"""Admin API endpoints for Flare
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Provides authentication, project, version, and API management endpoints.
"""

import os
import sys
import hashlib
import json
import jwt
import httpx
from datetime import datetime, timedelta, timezone
from typing import Optional, List, Dict, Any
from pathlib import Path
import threading
import time
import bcrypt

from fastapi import APIRouter, HTTPException, Depends, Body, Query
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
from pydantic import BaseModel, Field

from utils import log

# ===================== JWT Config =====================
def get_jwt_config():
    """Get JWT configuration based on environment"""
    work_mode = os.getenv("WORK_MODE", "on-premise")
    
    if work_mode == "hfcloud":
        # Cloud mode - use secrets from environment
        jwt_secret = os.getenv("JWT_SECRET")
        if not jwt_secret:
            log("⚠️  WARNING: JWT_SECRET not found in environment, using fallback")
            jwt_secret = "flare-admin-secret-key-change-in-production"  # Fallback
    else:
        # On-premise mode - use .env file
        from dotenv import load_dotenv
        load_dotenv()
        jwt_secret = os.getenv("JWT_SECRET", "flare-admin-secret-key-change-in-production")
    
    return {
        "secret": jwt_secret,
        "algorithm": os.getenv("JWT_ALGORITHM", "HS256"),
        "expiration_hours": int(os.getenv("JWT_EXPIRATION_HOURS", "24"))
    }

# ===================== Constants & Config =====================
router = APIRouter(prefix="/api")
security = HTTPBearer()

# ===================== Models =====================
class LoginRequest(BaseModel):
    username: str
    password: str

class LoginResponse(BaseModel):
    token: str
    username: str

class ChangePasswordRequest(BaseModel):
    current_password: str
    new_password: str
    
class EnvironmentUpdate(BaseModel):
    work_mode: str
    cloud_token: Optional[str] = None
    spark_endpoint: str
    internal_prompt: Optional[str] = None
    tts_engine: str = "no_tts"
    tts_engine_api_key: Optional[str] = None
    tts_settings: Optional[Dict[str, Any]] = None
    stt_engine: str = "no_stt"
    stt_engine_api_key: Optional[str] = None
    stt_settings: Optional[Dict[str, Any]] = None
    parameter_collection_config: Optional[Dict[str, Any]] = None

class ProjectCreate(BaseModel):
    name: str
    caption: Optional[str] = ""
    icon: Optional[str] = "folder"  
    description: Optional[str] = ""  
    default_language: str = "Türkçe"  # Locale'in name alanı (Türkçe, English vb.)
    supported_languages: List[str] = Field(default_factory=lambda: ["tr-TR"])  # Locale kodları
    timezone: str = "Europe/Istanbul"  
    region: str = "tr-TR"  
    
class ProjectUpdate(BaseModel):
    caption: str
    icon: Optional[str] = "folder"  
    description: Optional[str] = ""  
    default_language: str = "Türkçe"  # Locale'in name alanı
    supported_languages: List[str] = Field(default_factory=lambda: ["tr-TR"])  # Locale kodları
    timezone: str = "Europe/Istanbul"
    region: str = "tr-TR"
    last_update_date: str
    
class VersionCreate(BaseModel):
    caption: str
    source_version_id: int | None = None    # None → boş template

class IntentModel(BaseModel):
    name: str
    caption: Optional[str] = ""
    locale: str = "tr-TR"
    detection_prompt: str
    examples: List[str] = []
    parameters: List[Dict[str, Any]] = []
    action: str
    fallback_timeout_prompt: Optional[str] = None
    fallback_error_prompt: Optional[str] = None

class VersionUpdate(BaseModel):
    caption: str
    general_prompt: str
    llm: Dict[str, Any]
    intents: List[IntentModel]
    last_update_date: str

class APICreate(BaseModel):
    name: str
    url: str
    method: str = "POST"
    headers: Dict[str, str] = {}
    body_template: Dict[str, Any] = {}
    timeout_seconds: int = 10
    retry: Dict[str, Any] = Field(default_factory=lambda: {"retry_count": 3, "backoff_seconds": 2, "strategy": "static"})
    proxy: Optional[str] = None
    auth: Optional[Dict[str, Any]] = None
    response_prompt: Optional[str] = None
    response_mappings: List[Dict[str, Any]] = []

class APIUpdate(BaseModel):
    url: str
    method: str
    headers: Dict[str, str]
    body_template: Dict[str, Any]
    timeout_seconds: int
    retry: Dict[str, Any]
    proxy: Optional[str]
    auth: Optional[Dict[str, Any]]
    response_prompt: Optional[str]
    response_mappings: List[Dict[str, Any]] = []
    last_update_date: str
    
class TestRequest(BaseModel):
    test_type: str  # "all", "ui", "backend", "integration", "spark"

class EnvironmentUpdate(BaseModel):
    work_mode: str
    cloud_token: Optional[str] = None
    spark_endpoint: str
    internal_prompt: Optional[str] = None
    tts_engine: str = "no_tts"
    tts_engine_api_key: Optional[str] = None
    tts_settings: Optional[Dict[str, Any]] = None
    stt_engine: str = "no_stt"
    stt_engine_api_key: Optional[str] = None
    stt_settings: Optional[Dict[str, Any]] = None

class TTSRequest(BaseModel):
    text: str
    voice_id: Optional[str] = None
    model_id: Optional[str] = None
    output_format: Optional[str] = "mp3_44100_128"
    
    class Config:
        protected_namespaces = ()  # Pydantic uyarısını susturmak için

# ===================== Helpers =====================
def verify_token(credentials: HTTPAuthorizationCredentials = Depends(security)) -> str:
    """Verify JWT token and return username"""
    jwt_config = get_jwt_config()
    
    try:
        payload = jwt.decode(
            credentials.credentials, 
            jwt_config["secret"], 
            algorithms=[jwt_config["algorithm"]]
        )
        username = payload.get("sub")
        if username is None:
            raise HTTPException(status_code=401, detail="Invalid token")
        return username
    except jwt.ExpiredSignatureError:
        raise HTTPException(status_code=401, detail="Token expired")
    except jwt.InvalidTokenError:  # Bu genel JWT hatalarını yakalar
        raise HTTPException(status_code=401, detail="Invalid token")
        
def hash_password(password: str, salt: str = None) -> tuple[str, str]:
    """Hash password with bcrypt.
    Returns (hashed_password, salt)"""
    if salt is None:
        salt = bcrypt.gensalt().decode('utf-8')
    
    # Ensure salt is bytes
    salt_bytes = salt.encode('utf-8') if isinstance(salt, str) else salt
    
    # Hash the password
    hashed = bcrypt.hashpw(password.encode('utf-8'), salt_bytes)
    
    return hashed.decode('utf-8'), salt

def verify_password(password: str, hashed: str, salt: str = None) -> bool:
    """Verify password against hash"""
    try:
        # For bcrypt hashes (they contain salt)
        if hashed.startswith('$2b$') or hashed.startswith('$2a$'):
            return bcrypt.checkpw(password.encode('utf-8'), hashed.encode('utf-8'))
        
        # For legacy SHA256 hashes
        return hashlib.sha256(password.encode()).hexdigest() == hashed
    except Exception as e:
        log(f"Password verification error: {e}")
        return False

def load_config():
    """Load service_config.jsonc"""
    config_path = Path("service_config.jsonc")
    if not config_path.exists():
        return {"config": {}, "projects": [], "apis": []}
    
    with open(config_path, 'r', encoding='utf-8') as f:
        content = f.read()
        # Remove comments for JSON parsing
        lines = []
        for line in content.split('\n'):
            stripped = line.strip()
            if not stripped.startswith('//'):
                lines.append(line)
        clean_content = '\n'.join(lines)
        return json.loads(clean_content)

def save_config(config: dict):
    """Save config back to service_config.jsonc"""
    with open("service_config.jsonc", 'w', encoding='utf-8') as f:
        json.dump(config, f, indent=2, ensure_ascii=False)
        
def get_timestamp():
    """Get current timestamp in ISO format with milliseconds"""
    return datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%S.%f")[:-3] + "Z"

def add_activity_log(config: dict, username: str, action: str, 
                    entity_type: str, entity_id: Any, entity_name: str,
                    details: str = ""):
    """Add activity log entry"""
    if "activity_log" not in config:
        config["activity_log"] = []
    
    # Get next ID
    log_id = max([log.get("id", 0) for log in config["activity_log"]], default=0) + 1
    
    config["activity_log"].append({
        "id": log_id,
        "timestamp": get_timestamp(),
        "user": username,
        "action": action,
        "entity_type": entity_type,
        "entity_id": entity_id,
        "entity_name": entity_name,
        "details": details
    })
    
    # Keep only last 1000 entries
    if len(config["activity_log"]) > 1000:
        config["activity_log"] = config["activity_log"][-1000:]

async def _spark_project_control(action: str, project_name: str, username: str):
    """Common function for Spark project control"""
    if not project_name:
        raise HTTPException(status_code=400, detail="project_name is required")
    
    config = load_config()
    spark_endpoint = config.get("config", {}).get("spark_endpoint", "").rstrip("/")
    spark_token = _get_spark_token()
    
    if not spark_endpoint:
        raise HTTPException(status_code=400, detail="Spark endpoint not configured")
    
    if not spark_token:
        raise HTTPException(status_code=400, detail="Spark token not configured")
    
    headers = {
        "Authorization": f"Bearer {spark_token}",
        "Content-Type": "application/json"
    }
    
    try:
        async with httpx.AsyncClient(timeout=30) as client:
            # Hepsi POST request olarak gönderiliyor
            response = await client.post(
                f"{spark_endpoint}/project/{action}",
                json={"project_name": project_name},
                headers=headers
            )
            
            response.raise_for_status()
            return response.json()
            
    except httpx.HTTPStatusError as e:
        error_detail = e.response.json() if e.response.text else {"error": str(e)}
        raise HTTPException(status_code=e.response.status_code, detail=error_detail)
    except Exception as e:
        log(f"❌ Spark {action} failed: {e}")
        raise HTTPException(status_code=500, detail=str(e))

def _get_spark_token() -> Optional[str]:
    """Get Spark token based on work_mode"""
    config = load_config()
    work_mode = config.get("config", {}).get("work_mode", "on-premise")
    
    if work_mode in ("hfcloud", "cloud"):
        # Cloud mode - use HuggingFace Secrets
        token = os.getenv("SPARK_TOKEN")
        if not token:
            log("❌ SPARK_TOKEN not found in HuggingFace Secrets!")
        return token
    else:
        # On-premise mode - use .env file
        from dotenv import load_dotenv
        load_dotenv()
        return os.getenv("SPARK_TOKEN")

async def notify_spark_manual(project: dict, version: dict, global_config: dict):
    """Manual Spark notification (similar to notify_spark but returns response)"""
    import httpx
    
    spark_endpoint = global_config.get("spark_endpoint", "").rstrip("/")
    spark_token = _get_spark_token()
    
    if not spark_endpoint:
        raise ValueError("Spark endpoint not configured")
    
    if not spark_token:
        raise ValueError("Spark token not configured")
    
    work_mode = global_config.get("work_mode", "hfcloud")
    cloud_token = global_config.get("cloud_token", "")
    
    # Decrypt token if needed
    if cloud_token and cloud_token.startswith("enc:"):
        from encryption_utils import decrypt
        cloud_token = decrypt(cloud_token)
    
    payload = {
        "work_mode": work_mode,
        "cloud_token": cloud_token,
        "project_name": project["name"],
        "project_version": version["id"],
        "repo_id": version["llm"]["repo_id"],
        "generation_config": version["llm"]["generation_config"],
        "use_fine_tune": version["llm"]["use_fine_tune"],
        "fine_tune_zip": version["llm"]["fine_tune_zip"] if version["llm"]["use_fine_tune"] else None
    }
    
    headers = {
        "Authorization": f"Bearer {spark_token}",
        "Content-Type": "application/json"
    }
    
    log(f"🚀 Manually notifying Spark about {project['name']} v{version['id']}")
    
    async with httpx.AsyncClient(timeout=30) as client:
        response = await client.post(spark_endpoint + "/startup", json=payload, headers=headers)
        response.raise_for_status()
        result = response.json()
        log(f"✅ Spark manual notification successful: {result.get('message', 'OK')}")
        return result

# ===================== Auth Endpoints =====================
@router.post("/login", response_model=LoginResponse)
async def login(request: LoginRequest):
    """Authenticate user and return JWT token"""
    config = load_config()
    users = config.get("config", {}).get("users", [])
    
    # Find user
    user = next((u for u in users if u["username"] == request.username), None)
    if not user:
        raise HTTPException(status_code=401, detail="Invalid credentials")
    
    # Verify password
    if not verify_password(request.password, user["password_hash"], user.get("salt")):
        raise HTTPException(status_code=401, detail="Invalid credentials")
    
    # Generate JWT token
    jwt_config = get_jwt_config()
    
    payload = {
        "sub": request.username,
        "exp": datetime.now(timezone.utc) + timedelta(hours=jwt_config["expiration_hours"])
    }
    
    token = jwt.encode(payload, jwt_config["secret"], algorithm=jwt_config["algorithm"])
    
    log(f"✅ User '{request.username}' logged in")
    return LoginResponse(token=token, username=request.username)

@router.post("/change-password")
async def change_password(
    request: ChangePasswordRequest,
    username: str = Depends(verify_token)
):
    """Change user password"""
    config = load_config()
    users = config.get("config", {}).get("users", [])
    
    # Find user
    user = next((u for u in users if u["username"] == username), None)
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    
    # Verify current password
    if not verify_password(request.current_password, user["password_hash"], user.get("salt")):
        raise HTTPException(status_code=401, detail="Current password is incorrect")
    
    # Hash new password
    new_hash, new_salt = hash_password(request.new_password)
    user["password_hash"] = new_hash
    user["salt"] = new_salt
    
    # Save config
    save_config(config)
    
    log(f"✅ Password changed for user '{username}'")
    return {"success": True}

# ===================== Locales Endpoints =====================
@router.get("/locales")
async def get_available_locales(username: str = Depends(verify_token)):
    """Get all system-supported locales"""
    from locale_manager import LocaleManager
    
    locales = LocaleManager.get_available_locales_with_names()
    
    return {
        "locales": locales,
        "default": LocaleManager.get_default_locale()
    }

@router.get("/locales/{locale_code}")
async def get_locale_details(
    locale_code: str,
    username: str = Depends(verify_token)
):
    """Get detailed information for a specific locale"""
    from locale_manager import LocaleManager
    
    locale_info = LocaleManager.get_locale_details(locale_code)
    
    if not locale_info:
        raise HTTPException(status_code=404, detail=f"Locale '{locale_code}' not found")
    
    return locale_info
    
# ===================== Environment Endpoints =====================
@router.get("/environment")
async def get_environment(username: str = Depends(verify_token)):
    """Get environment configuration"""
    config = load_config()
    env_config = config.get("config", {})
    
    return {
        "work_mode": env_config.get("work_mode", "on-premise"),
        "cloud_token": env_config.get("cloud_token", ""),
        "spark_endpoint": env_config.get("spark_endpoint", "http://localhost:7861"),
        "internal_prompt": env_config.get("internal_prompt", ""),
        "tts_engine": env_config.get("tts_engine", "no_tts"),
        "tts_engine_api_key": env_config.get("tts_engine_api_key", ""),
        "tts_settings": env_config.get("tts_settings", {
            "use_ssml": False
        }),
        "stt_engine": env_config.get("stt_engine", "no_stt"),
        "stt_engine_api_key": env_config.get("stt_engine_api_key", ""),
        "stt_settings": env_config.get("stt_settings", {
            "speech_timeout_ms": 2000,
            "noise_reduction_level": 2,
            "vad_sensitivity": 0.5,
            "language": "tr-TR",
            "model": "latest_long",
            "use_enhanced": True,
            "enable_punctuation": True,
            "interim_results": True
            }),
        "parameter_collection_config": env_config.get("parameter_collection_config", {})
    }

@router.put("/environment")
async def update_environment(
    update: EnvironmentUpdate,
    username: str = Depends(verify_token)
):
    """Update environment configuration"""
    config = load_config()
    
    # Token validation based on mode
    if update.work_mode in ("gpt4o", "gpt4o-mini"):
        if not update.cloud_token:
            raise HTTPException(status_code=400, detail="OpenAI API key is required for GPT modes")
        if not update.cloud_token.startswith("sk-") and not update.cloud_token.startswith("enc:"):
            raise HTTPException(status_code=400, detail="Invalid OpenAI API key format")
    elif update.work_mode in ("hfcloud", "cloud"):
        if not update.cloud_token:
            raise HTTPException(status_code=400, detail="Cloud token is required for cloud modes")

    # Debug log - gelen değerleri kontrol et
    log(f"📥 Received TTS engine: {update.tts_engine}")
    log(f"📥 Received TTS key: {'***' + update.tts_engine_api_key[-4:] if update.tts_engine_api_key else 'None'}")

    # TTS/STT validation
    if update.tts_engine not in ("no_tts", "elevenlabs", "blaze"):
        raise HTTPException(status_code=400, detail="Invalid TTS engine")
    
    if update.stt_engine not in ("no_stt", "google", "azure", "amazon", "gpt4o_realtime", "flicker"):
        raise HTTPException(status_code=400, detail="Invalid STT engine")
    
    if update.tts_engine != "no_tts" and not update.tts_engine_api_key:
        raise HTTPException(status_code=400, detail=f"{update.tts_engine} API key is required")
    
    if update.stt_engine != "no_stt" and not update.stt_engine_api_key:
        raise HTTPException(status_code=400, detail=f"{update.stt_engine} API key or credentials required")
    
    # Spark endpoint validation
    if update.work_mode not in ("gpt4o", "gpt4o-mini") and not update.spark_endpoint:
        raise HTTPException(status_code=400, detail="Spark endpoint is required for non-GPT modes")
    
    # Encrypt API keys if needed
    from encryption_utils import encrypt
    
    # TTS key encryption
    if update.tts_engine_api_key:
        encrypted_tts_key = encrypt(update.tts_engine_api_key)
        log(f"🔐 Encrypted TTS key: {encrypted_tts_key[:20]}...")
    else:
        encrypted_tts_key = ""

    # STT key encryption
    if update.stt_engine_api_key:
        encrypted_stt_key = encrypt(update.stt_engine_api_key)
    else:
        encrypted_stt_key = ""

    # Update config
    config["config"]["work_mode"] = update.work_mode
    config["config"]["cloud_token"] = encrypt(update.cloud_token) if update.cloud_token else ""
    config["config"]["spark_endpoint"] = update.spark_endpoint
    config["config"]["internal_prompt"] = update.internal_prompt or ""
    config["config"]["tts_engine"] = update.tts_engine
    config["config"]["tts_engine_api_key"] = encrypted_tts_key
    config["config"]["stt_engine"] = update.stt_engine
    config["config"]["stt_engine_api_key"] = encrypted_stt_key
    config["config"]["last_update_date"] = get_timestamp()
    config["config"]["last_update_user"] = username
    config["config"]["parameter_collection_config"] = update.parameter_collection_config
    
    if update.tts_settings:
        config["config"]["tts_settings"] = update.tts_settings
    
    if update.stt_settings:
        config["config"]["stt_settings"] = update.stt_settings
    
    # Add activity log
    add_activity_log(config, username, "UPDATE_ENVIRONMENT", "config", None, 
                    "environment", f"Changed to {update.work_mode}, TTS: {update.tts_engine}, STT: {update.stt_engine}")
    
    # Save config
    save_config(config)
    
    # Reload ConfigProvider to reflect changes
    from config_provider import ConfigProvider
    ConfigProvider.reload()
    
    log(f"✅ Environment updated to {update.work_mode} with TTS: {update.tts_engine}, STT: {update.stt_engine} by {username}")
    return {"success": True}

# ===================== Project Endpoints =====================
@router.get("/projects/names")
def list_enabled_projects():
    """Get list of enabled project names for chat"""
    cfg = load_config()
    projects = cfg.get("projects", [])
    return [p["name"] for p in projects if p.get("enabled", False) and not p.get("deleted", False)]

@router.get("/projects")
async def list_projects(
    include_deleted: bool = False,
    username: str = Depends(verify_token)
):
    """List all projects"""
    config = load_config()
    projects = config.get("projects", [])
    
    # Filter deleted if needed
    if not include_deleted:
        projects = [p for p in projects if not p.get("deleted", False)]
    
    return projects

@router.get("/projects/{project_id}")
async def get_project(
    project_id: int,
    username: str = Depends(verify_token)
):
    """Get single project by ID"""
    try:
        config = load_config()
        projects = config.get("projects", [])
        
        project = next((p for p in projects if p.get("id") == project_id), None)
        if not project or project.get("deleted", False):
            raise HTTPException(status_code=404, detail="Project not found")
        
        return project
        
    except HTTPException:
        raise
    except Exception as e:
        log(f"Failed to get project: {e}")
        raise HTTPException(status_code=500, detail=str(e))

@router.post("/projects")
async def create_project(
    project: ProjectCreate,
    username: str = Depends(verify_token)
):
    """Create new project with initial version"""
    config = load_config()
    
    # Validate project name
    existing_names = [p["name"].lower() for p in config.get("projects", []) if not p.get("deleted", False)]
    if project.name.lower() in existing_names:
        raise HTTPException(status_code=400, detail="Project name already exists")
    
    # Validate supported languages
    from locale_manager import LocaleManager
    
    invalid_languages = LocaleManager.validate_project_languages(project.supported_languages)
    if invalid_languages:
        available_locales = LocaleManager.get_available_locales_with_names()
        available_codes = [locale['code'] for locale in available_locales]
        raise HTTPException(
            status_code=400, 
            detail=f"Unsupported languages: {', '.join(invalid_languages)}. Available languages: {', '.join(available_codes)}"
        )
    
    # Check if default language is in supported languages
    # NOT: default_language bir name (Türkçe), supported_languages ise code'lar (tr-TR)
    # Bu yüzden karşılaştırma yapamayız, sadece supported_languages'ın boş olmamasını kontrol edelim
    if not project.supported_languages:
        raise HTTPException(
            status_code=400,
            detail="At least one supported language must be selected"
        )
    
    # Get new project ID
    project_id = config.get("project_id_counter", 1)
    config["project_id_counter"] = project_id + 1
    
    # Create project with version
    new_project = {
        "id": project_id,
        "name": project.name,
        "caption": project.caption,
        "icon": project.icon,
        "description": project.description,
        "default_language": project.default_language,
        "supported_languages": project.supported_languages,
        "timezone": project.timezone,
        "region": project.region,
        "enabled": True,
        "deleted": False,
        "version_id_counter": 2,  # Start from 2 since we create version 1
        "last_version_number": 1,
        "created_date": get_timestamp(),
        "created_by": username,
        "last_update_date": get_timestamp(),
        "last_update_user": username,
        "versions": [
            {
                "id": 1,
                "no": 1,
                "caption": "Version 1",
                "published": False,
                "created_date": get_timestamp(),
                "created_by": username,
                "last_update_date": get_timestamp(),
                "last_update_user": username,
                "general_prompt": "",
                "llm": {
                    "repo_id": "Qwen/Qwen2.5-72B-Instruct",
                    "generation_config": {
                        "temperature": 0.5,
                        "max_tokens": 2048,
                        "top_p": 0.7,
                        "repetition_penalty": 1.1
                    },
                    "use_fine_tune": False,
                    "fine_tune_zip": ""
                },
                "intents": []
            }
        ]
    }
    
    # Add to config
    if "projects" not in config:
        config["projects"] = []
    config["projects"].append(new_project)
    
    # Add activity log
    add_activity_log(config, username, "CREATE_PROJECT", "project", project_id, project.name)
    
    # Save
    save_config(config)
    
    log(f"✅ Project '{project.name}' created by {username}")
    return new_project

@router.put("/projects/{project_id}")
async def update_project(
    project_id: int,
    update: ProjectUpdate,
    username: str = Depends(verify_token)
):
    """Update project"""
    config = load_config()
    
    # Find project
    project = next((p for p in config.get("projects", []) if p["id"] == project_id), None)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")
    
    # Check race condition
    if project.get("last_update_date") != update.last_update_date:
        raise HTTPException(status_code=409, detail="Project was modified by another user")
    
    # Update - yeni alanlarla
    project["caption"] = update.caption
    project["icon"] = update.icon
    project["description"] = update.description
    project["default_language"] = update.default_language
    project["supported_languages"] = update.supported_languages
    project["timezone"] = update.timezone
    project["region"] = update.region
    project["last_update_date"] = get_timestamp()
    project["last_update_user"] = username
    
    # Add activity log
    add_activity_log(config, username, "UPDATE_PROJECT", "project", project_id, project["name"])
    
    # Save
    save_config(config)
    
    log(f"✅ Project '{project['name']}' updated by {username}")
    return project

@router.delete("/projects/{project_id}")
async def delete_project(project_id: int, username: str = Depends(verify_token)):
    """Delete project (soft delete)"""
    config = load_config()
    
    # Find project
    project = next((p for p in config.get("projects", []) if p["id"] == project_id), None)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")
    
    # Soft delete
    project["deleted"] = True
    project["last_update_date"] = get_timestamp()
    project["last_update_user"] = username
    
    # Add activity log
    add_activity_log(config, username, "DELETE_PROJECT", "project", project_id, project["name"])
    
    # Save
    save_config(config)
    
    log(f"✅ Project '{project['name']}' deleted by {username}")
    return {"success": True}

@router.patch("/projects/{project_id}/toggle")
async def toggle_project(project_id: int, username: str = Depends(verify_token)):
    """Toggle project enabled status"""
    config = load_config()
    
    # Find project
    project = next((p for p in config.get("projects", []) if p["id"] == project_id), None)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")
    
    # Toggle
    project["enabled"] = not project.get("enabled", False)
    project["last_update_date"] = get_timestamp()
    project["last_update_user"] = username
    
    # Add activity log
    action = "ENABLE_PROJECT" if project["enabled"] else "DISABLE_PROJECT"
    add_activity_log(config, username, action, "project", project_id, project["name"])
    
    # Save
    save_config(config)
    
    log(f"✅ Project '{project['name']}' {'enabled' if project['enabled'] else 'disabled'} by {username}")
    return {"enabled": project["enabled"]}

# ===================== Version Endpoints =====================
@router.get("/projects/{project_id}/versions")
async def list_versions(
    project_id: int,
    include_deleted: bool = False,
    username: str = Depends(verify_token)
):
    """List project versions"""
    config = load_config()
    
    # Find project
    project = next((p for p in config.get("projects", []) if p["id"] == project_id), None)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")
    
    versions = project.get("versions", [])
    
    # Filter deleted if needed
    if not include_deleted:
        versions = [v for v in versions if not v.get("deleted", False)]
    
    return versions

@router.post("/projects/{project_id}/versions")
async def create_version(
    project_id: int,
    version_data: VersionCreate,
    username: str = Depends(verify_token)
):
    """Create new version"""
    config = load_config()
    
    # Find project
    project = next((p for p in config.get("projects", []) if p["id"] == project_id), None)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")
    
    # Get next version ID
    version_id = project.get("version_id_counter", 0) + 1
    project["version_id_counter"] = version_id
    
    # Get next version number
    existing_versions = [v for v in project.get("versions", []) if not v.get("deleted", False)]
    version_no = max([v.get("no", 0) for v in existing_versions], default=0) + 1
    
    # Create base version
    new_version = {
        "id": version_id,
        "no": version_no,
        "caption": version_data.caption,
        "description": f"Version {version_no}",
        "published": False,
        "deleted": False,
        "created_date": get_timestamp(),
        "created_by": username,
        "last_update_date": get_timestamp(),
        "last_update_user": username,
        "publish_date": None,
        "published_by": None
    }
    
    # Copy from source version if specified
    if version_data.source_version_id:
        source_version = next(
            (v for v in project.get("versions", []) if v["id"] == version_data.source_version_id),
            None
        )
        if source_version:
            # Copy configuration from source
            new_version.update({
                "general_prompt": source_version.get("general_prompt", ""),
                "llm": source_version.get("llm", {}).copy(),
                "intents": [intent.copy() for intent in source_version.get("intents", [])],
                "parameters": [param.copy() for param in source_version.get("parameters", [])]
            })
    else:
        # Empty template
        new_version.update({
            "general_prompt": "",
            "llm": {
                "repo_id": "",
                "generation_config": {
                    "max_new_tokens": 512,
                    "temperature": 0.7,
                    "top_p": 0.95,
                    "top_k": 50,
                    "repetition_penalty": 1.1
                },
                "use_fine_tune": False,
                "fine_tune_zip": ""
            },
            "intents": [],
            "parameters": []
        })
    
    # Add to project
    if "versions" not in project:
        project["versions"] = []
    project["versions"].append(new_version)
    
    # Update project timestamp
    project["last_update_date"] = get_timestamp()
    project["last_update_user"] = username
    
    # Add activity log
    add_activity_log(config, username, "CREATE_VERSION", "version", version_id,
                    f"{project['name']} v{version_no}")
    
    # Save
    save_config(config)
    
    log(f"✅ Version {version_no} created for project '{project['name']}' by {username}")
    return new_version

@router.put("/projects/{project_id}/versions/{version_id}")
async def update_version(
    project_id: int,
    version_id: int,
    update: VersionUpdate,
    username: str = Depends(verify_token)
):
    """Update version"""
    config = load_config()
    
    # Find project and version
    project = next((p for p in config.get("projects", []) if p["id"] == project_id), None)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")
    
    version = next((v for v in project.get("versions", []) if v["id"] == version_id), None)
    if not version:
        raise HTTPException(status_code=404, detail="Version not found")
    
    # Check race condition
    if version.get("last_update_date") != update.last_update_date:
        raise HTTPException(status_code=409, detail="Version was modified by another user")
    
    # Cannot update published version
    if version.get("published", False):
        raise HTTPException(status_code=400, detail="Cannot modify published version")
    
    # Update version
    version["caption"] = update.caption
    version["general_prompt"] = update.general_prompt
    version["llm"] = update.llm
    version["intents"] = [intent.dict() for intent in update.intents]
    version["last_update_date"] = get_timestamp()
    version["last_update_user"] = username
    
    # Update project timestamp
    project["last_update_date"] = get_timestamp()
    project["last_update_user"] = username
    
    # Add activity log
    add_activity_log(config, username, "UPDATE_VERSION", "version", version_id,
                    f"{project['name']} v{version['no']}")
    
    # Save
    save_config(config)
    
    log(f"✅ Version {version['no']} updated for project '{project['name']}' by {username}")
    return version

@router.post("/projects/{project_id}/versions/{version_id}/publish")
async def publish_version(
    project_id: int,
    version_id: int,
    username: str = Depends(verify_token)
):
    """Publish version"""
    config = load_config()
    
    # Find project and version
    project = next((p for p in config.get("projects", []) if p["id"] == project_id), None)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")
    
    version = next((v for v in project.get("versions", []) if v["id"] == version_id), None)
    if not version:
        raise HTTPException(status_code=404, detail="Version not found")
    
    # Unpublish all other versions
    for v in project.get("versions", []):
        if v["id"] != version_id:
            v["published"] = False
    
    # Publish this version
    version["published"] = True
    version["publish_date"] = get_timestamp()
    version["published_by"] = username
    version["last_update_date"] = get_timestamp()
    version["last_update_user"] = username
    
    # Update project timestamp
    project["last_update_date"] = get_timestamp()
    project["last_update_user"] = username
    
    # Add activity log
    add_activity_log(config, username, "PUBLISH_VERSION", "version", version_id,
                    f"{project['name']} v{version['no']}")
    
    # Save
    save_config(config)
    
    log(f"✅ Version {version_id} published for project '{project['name']}' by {username}")

    # Notify Spark if project is enabled
    if project.get("enabled", False):
        try:
            await notify_spark_manual(project, version, config.get("config", {}))
        except Exception as e:
            log(f"⚠️ Failed to notify Spark: {e}")
            # Don't fail the publish 

    return {"success": True}

@router.delete("/projects/{project_id}/versions/{version_id}")
async def delete_version(
    project_id: int,
    version_id: int,
    username: str = Depends(verify_token)
):
    """Delete version (soft delete)"""
    config = load_config()
    
    # Find project and version
    project = next((p for p in config.get("projects", []) if p["id"] == project_id), None)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")
    
    version = next((v for v in project.get("versions", []) if v["id"] == version_id), None)
    if not version:
        raise HTTPException(status_code=404, detail="Version not found")
    
    # Cannot delete published version
    if version.get("published", False):
        raise HTTPException(status_code=400, detail="Cannot delete published version")
    
    # Soft delete
    version["deleted"] = True
    version["last_update_date"] = get_timestamp()
    version["last_update_user"] = username
    
    project["last_update_date"] = get_timestamp()
    project["last_update_user"] = username
    
    # Add activity log
    add_activity_log(config, username, "DELETE_VERSION", "version", version_id,
                    f"{project['name']} v{version_id}")
    
    # Save
    save_config(config)
    
    log(f"✅ Version {version_id} deleted for project '{project['name']}' by {username}")
    return {"success": True}

@router.post("/validate/regex")
async def validate_regex(
    request: dict = Body(...),
    username: str = Depends(verify_token)
):
    """Validate regex pattern"""
    pattern = request.get("pattern", "")
    test_value = request.get("test_value", "")
    
    try:
        import re
        compiled_regex = re.compile(pattern)
        matches = bool(compiled_regex.match(test_value))
        
        return {
            "valid": True,
            "matches": matches,
            "pattern": pattern,
            "test_value": test_value
        }
    except Exception as e:
        return {
            "valid": False,
            "matches": False,
            "error": str(e),
            "pattern": pattern,
            "test_value": test_value
        }
        
# ===================== API Endpoints =====================
@router.get("/apis")
async def list_apis(
    include_deleted: bool = False,
    username: str = Depends(verify_token)
):
    """List all APIs"""
    config = load_config()
    apis = config.get("apis", [])
    
    # Filter deleted if needed
    if not include_deleted:
        apis = [a for a in apis if not a.get("deleted", False)]
    
    return apis

@router.post("/apis")
async def create_api(api: APICreate, username: str = Depends(verify_token)):
    """Create new API"""
    config = load_config()
    
    # Check duplicate name
    existing = [a for a in config.get("apis", []) if a["name"] == api.name]
    if existing:
        raise HTTPException(status_code=400, detail="API name already exists")
    
    # Create API
    new_api = api.dict()
    new_api["deleted"] = False
    new_api["created_date"] = get_timestamp()
    new_api["created_by"] = username
    new_api["last_update_date"] = get_timestamp()
    new_api["last_update_user"] = username
    
    if "apis" not in config:
        config["apis"] = []
    config["apis"].append(new_api)
    
    # Add activity log
    add_activity_log(config, username, "CREATE_API", "api", api.name, api.name)
    
    # Save
    save_config(config)
    
    log(f"✅ API '{api.name}' created by {username}")
    return new_api

@router.put("/apis/{api_name}")
async def update_api(
    api_name: str,
    update: APIUpdate,
    username: str = Depends(verify_token)
):
    """Update API"""
    config = load_config()
    
    # Find API
    api = next((a for a in config.get("apis", []) if a["name"] == api_name), None)
    if not api:
        raise HTTPException(status_code=404, detail="API not found")
    
    # Check race condition
    if api.get("last_update_date") != update.last_update_date:
        raise HTTPException(status_code=409, detail="API was modified by another user")
    
    # Check if API is in use
    for project in config.get("projects", []):
        for version in project.get("versions", []):
            for intent in version.get("intents", []):
                if intent.get("action") == api_name and version.get("published", False):
                    raise HTTPException(status_code=400,
                                      detail=f"API is used in published version of project '{project['name']}'")
    
    # Update
    update_dict = update.dict()
    del update_dict["last_update_date"]
    api.update(update_dict)
    api["last_update_date"] = get_timestamp()
    api["last_update_user"] = username
    
    # Add activity log
    add_activity_log(config, username, "UPDATE_API", "api", api_name, api_name)
    
    # Save
    save_config(config)
    
    log(f"✅ API '{api_name}' updated by {username}")
    return api

@router.delete("/apis/{api_name}")
async def delete_api(api_name: str, username: str = Depends(verify_token)):
    """Delete API (soft delete)"""
    config = load_config()
    
    # Find API
    api = next((a for a in config.get("apis", []) if a["name"] == api_name), None)
    if not api:
        raise HTTPException(status_code=404, detail="API not found")
    
    # Check if API is in use
    for project in config.get("projects", []):
        # Skip deleted projects
        if project.get("deleted", False):
            continue
            
        for version in project.get("versions", []):
            # Skip deleted versions
            if version.get("deleted", False):
                continue
            
            # Check in intents
            for intent in version.get("intents", []):
                if intent.get("action") == api_name:
                    raise HTTPException(status_code=400,
                                      detail=f"API is used in intent '{intent.get('name', 'unknown')}' in project '{project['name']}' version {version.get('version_number', version.get('id'))}")
    
    # Soft delete
    api["deleted"] = True
    api["last_update_date"] = get_timestamp()
    api["last_update_user"] = username
    
    # Add activity log
    add_activity_log(config, username, "DELETE_API", "api", api_name, api_name)
    
    # Save
    save_config(config)
    
    log(f"✅ API '{api_name}' deleted by {username}")
    return {"success": True}
    
# ===================== Spark Integration Endpoints =====================
@router.post("/spark/startup")
async def spark_startup(request: dict = Body(...), username: str = Depends(verify_token)):
    """Trigger Spark startup for a project"""
    project_name = request.get("project_name")
    if not project_name:
        raise HTTPException(status_code=400, detail="project_name is required")
    
    config = load_config()
    
    # Find project
    project = next((p for p in config.get("projects", []) if p["name"] == project_name), None)
    if not project:
        raise HTTPException(status_code=404, detail=f"Project not found: {project_name}")
    
    # Find published version
    version = next((v for v in project.get("versions", []) if v.get("published", False)), None)
    if not version:
        raise HTTPException(status_code=400, detail=f"No published version found for project: {project_name}")
    
    # Notify Spark
    try:
        result = await notify_spark_manual(project, version, config.get("config", {}))
        return {"message": result.get("message", "Spark startup initiated")}
    except Exception as e:
        log(f"❌ Spark startup failed: {e}")
        raise HTTPException(status_code=500, detail=str(e))

@router.get("/spark/projects")
async def spark_get_projects(username: str = Depends(verify_token)):
    """Get Spark project list"""
    config = load_config()
    spark_endpoint = config.get("config", {}).get("spark_endpoint", "").rstrip("/")
    spark_token = _get_spark_token()
    
    if not spark_endpoint:
        raise HTTPException(status_code=400, detail="Spark endpoint not configured")
    
    if not spark_token:
        raise HTTPException(status_code=400, detail="Spark token not configured")
    
    headers = {
        "Authorization": f"Bearer {spark_token}"
    }
    
    try:
        async with httpx.AsyncClient(timeout=30) as client:
            response = await client.get(spark_endpoint + "/project/list", headers=headers)
            response.raise_for_status()
            return response.json()
    except Exception as e:
        log(f"❌ Failed to get Spark projects: {e}")
        raise HTTPException(status_code=500, detail=str(e))

@router.post("/spark/project/enable")
async def spark_enable_project(request: dict = Body(...), username: str = Depends(verify_token)):
    """Enable project in Spark"""
    return await _spark_project_control("enable", request.get("project_name"), username)

@router.post("/spark/project/disable") 
async def spark_disable_project(request: dict = Body(...), username: str = Depends(verify_token)):
    """Disable project in Spark"""
    return await _spark_project_control("disable", request.get("project_name"), username)

@router.delete("/spark/project/{project_name}")
async def spark_delete_project(project_name: str, username: str = Depends(verify_token)):
    """Delete project from Spark"""
    return await _spark_project_control("delete", project_name, username)

# ===================== Test Endpoints =====================
@router.post("/apis/test")
async def test_api(api_data: dict = Body(...), username: str = Depends(verify_token)):
    """Test API endpoint with auth support"""
    import requests
    import time
    
    try:
        # Extract test request data if provided
        test_request = api_data.pop("test_request", None)
        
        # Parse the APICreate model
        api = APICreate(**api_data)
        
        # Prepare headers
        headers = api.headers.copy()
        
        # Handle authentication if enabled
        auth_token = None
        if api.auth and api.auth.get("enabled"):
            auth_config = api.auth
            try:
                log(f"🔑 Fetching auth token for test...")
                
                # Make auth request
                auth_response = requests.post(
                    auth_config["token_endpoint"],
                    json=auth_config.get("token_request_body", {}),
                    timeout=10
                )
                auth_response.raise_for_status()
                
                # Extract token from response
                auth_json = auth_response.json()
                token_path = auth_config.get("response_token_path", "token").split(".")
                
                auth_token = auth_json
                for path_part in token_path:
                    auth_token = auth_token.get(path_part)
                    if auth_token is None:
                        raise ValueError(f"Token not found at path: {auth_config.get('response_token_path')}")
                
                # Add token to headers
                headers["Authorization"] = f"Bearer {auth_token}"
                log(f"✅ Auth token obtained: {auth_token[:20]}...")
                
            except Exception as e:
                log(f"❌ Auth failed during test: {e}")
                return {
                    "success": False,
                    "error": f"Authentication failed: {str(e)}"
                }
        
        # Use test_request if provided, otherwise use body_template
        request_body = test_request if test_request is not None else api.body_template
        
        # Make the actual API request
        start_time = time.time()
        
        # Determine how to send the body based on method
        if api.method in ["POST", "PUT", "PATCH"]:
            response = requests.request(
                method=api.method,
                url=api.url,
                headers=headers,
                json=request_body,
                timeout=api.timeout_seconds,
                proxies={"http": api.proxy, "https": api.proxy} if api.proxy else None
            )
        elif api.method == "GET":
            response = requests.request(
                method=api.method,
                url=api.url,
                headers=headers,
                params=request_body if isinstance(request_body, dict) else None,
                timeout=api.timeout_seconds,
                proxies={"http": api.proxy, "https": api.proxy} if api.proxy else None
            )
        else:  # DELETE, HEAD, etc.
            response = requests.request(
                method=api.method,
                url=api.url,
                headers=headers,
                timeout=api.timeout_seconds,
                proxies={"http": api.proxy, "https": api.proxy} if api.proxy else None
            )
        
        response_time = int((time.time() - start_time) * 1000)
        
        # Prepare response body
        try:
            response_body = response.json()
        except:
            response_body = response.text
        
        # Check if request was successful (2xx status codes)
        is_success = 200 <= response.status_code < 300
        
        # Extract values if response mappings are defined
        extracted_values = []
        if api.response_mappings and isinstance(response_body, dict):
            from jsonpath_ng import parse
            for mapping in api.response_mappings:
                try:
                    jsonpath_expr = parse(mapping['json_path'])
                    matches = jsonpath_expr.find(response_body)
                    value = matches[0].value if matches else None
                    extracted_values.append({
                        "variable_name": mapping['variable_name'],
                        "value": value,
                        "type": mapping['type'],
                        "caption": mapping.get('caption', '')
                    })
                except Exception as e:
                    log(f"Failed to extract {mapping['variable_name']}: {e}")
                    extracted_values.append({
                        "variable_name": mapping['variable_name'],
                        "value": None,
                        "error": str(e),
                        "type": mapping['type'],
                        "caption": mapping.get('caption', '')
                    })
        
        result = {
            "success": is_success,
            "status_code": response.status_code,
            "response_time": response_time,
            "response_body": response_body,
            "response_headers": dict(response.headers),
            "request_body": request_body,
            "request_headers": headers
        }
        
        # Add extracted values if any
        if extracted_values:
            result["extracted_values"] = extracted_values
        
        # Add error info for non-2xx responses
        if not is_success:
            result["error"] = f"HTTP {response.status_code}: {response.reason}"
        
        log(f"📋 Test result: {response.status_code} in {response_time}ms")
        return result
        
    except requests.exceptions.Timeout:
        return {
            "success": False,
            "error": f"Request timed out after {api.timeout_seconds} seconds"
        }
    except requests.exceptions.ConnectionError as e:
        return {
            "success": False,
            "error": f"Connection error: {str(e)}"
        }
    except Exception as e:
        log(f"❌ Test API error: {e}")
        return {
            "success": False,
            "error": str(e)
        }

@router.post("/test/run-all")
async def run_all_tests(
    request: TestRequest,
    username: str = Depends(verify_token)
):
    """Run all tests"""
    # TODO: Implement test runner
    return {
        "status": "completed",
        "total": 10,
        "passed": 8,
        "failed": 2,
        "details": []
    }

# ===================== Import/Export Endpoints =====================
@router.post("/projects/import")
async def import_project(
    project_data: dict = Body(...),
    username: str = Depends(verify_token)
):
    """Import project from JSON"""
    config = load_config()
    
    # Validate structure
    if "name" not in project_data:
        raise HTTPException(status_code=400, detail="Invalid project data")
    
    # Check duplicate name
    existing = [p for p in config.get("projects", []) 
               if p["name"] == project_data["name"] and not p.get("deleted", False)]
    if existing:
        raise HTTPException(status_code=400, detail="Project name already exists")
    
    # Get new project ID
    project_id = config["config"].get("project_id_counter", 0) + 1
    config["config"]["project_id_counter"] = project_id
    
    # Create new project
    new_project = {
        "id": project_id,
        "name": project_data["name"],
        "caption": project_data.get("caption", ""),
        "icon": project_data.get("icon", "folder"),
        "description": project_data.get("description", ""),
        "enabled": False,
        "deleted": False,
        "created_date": get_timestamp(),
        "created_by": username,
        "last_update_date": get_timestamp(),
        "last_update_user": username,
        "version_id_counter": 1,
        "versions": []
    }
    
    # Import versions
    for idx, version_data in enumerate(project_data.get("versions", [])):
        new_version = {
            "id": idx + 1,
            "no": idx + 1,
            "caption": version_data.get("caption", f"Version {idx + 1}"),
            "description": version_data.get("description", ""),
            "published": False,
            "deleted": False,
            "created_date": get_timestamp(),
            "created_by": username,
            "last_update_date": get_timestamp(),
            "last_update_user": username,
            "publish_date": None,
            "published_by": None,
            "general_prompt": version_data.get("general_prompt", ""),
            "llm": version_data.get("llm", {}),
            "intents": version_data.get("intents", []),
            "parameters": version_data.get("parameters", [])
        }
        new_project["versions"].append(new_version)
        new_project["version_id_counter"] = idx + 1
    
    # Add to config
    if "projects" not in config:
        config["projects"] = []
    config["projects"].append(new_project)
    
    # Add activity log
    add_activity_log(config, username, "IMPORT_PROJECT", "project", project_id, new_project["name"])
    
    # Save
    save_config(config)
    
    log(f"✅ Project '{new_project['name']}' imported by {username}")
    return new_project

@router.get("/projects/{project_id}/export")
async def export_project(
    project_id: int,
    username: str = Depends(verify_token)
):
    """Export project as JSON"""
    config = load_config()
    
    # Find project
    project = next((p for p in config.get("projects", []) if p["id"] == project_id), None)
    if not project:
        raise HTTPException(status_code=404, detail="Project not found")
    
    # Create export data
    export_data = {
        "name": project["name"],
        "caption": project.get("caption", ""),
        "icon": project.get("icon", "folder"),
        "description": project.get("description", ""),
        "versions": []
    }
    
    # Export versions
    for version in project.get("versions", []):
        if not version.get("deleted", False):
            export_version = {
                "caption": version.get("caption", ""),
                "description": version.get("description", ""),
                "general_prompt": version.get("general_prompt", ""),
                "llm": version.get("llm", {}),
                "intents": version.get("intents", []),
                "parameters": version.get("parameters", [])
            }
            export_data["versions"].append(export_version)
    
    # Add activity log
    add_activity_log(config, username, "EXPORT_PROJECT", "project", project_id, project["name"])
    save_config(config)
    
    log(f"✅ Project '{project['name']}' exported by {username}")
    return export_data

# ===================== TTS Endpoints =====================
@router.post("/tts/generate")
async def generate_tts(
    request: TTSRequest,
    username: str = Depends(verify_token)
):
    """Generate TTS audio from text"""
    try:
        # ConfigProvider'dan reload ederek güncel config'i alalım
        from config_provider import ConfigProvider
        cfg = ConfigProvider.reload()
        
        tts_engine = cfg.global_config.tts_engine
        log(f"🔧 TTS Engine: {tts_engine}")
        
        if tts_engine == "no_tts":
            raise HTTPException(status_code=400, detail="TTS is not configured")
        
        # Get decrypted API key
        api_key = cfg.global_config.get_tts_api_key()
        
        if not api_key:
            log("❌ TTS API key not found in config")
            raise HTTPException(status_code=400, detail="TTS API key not configured")
        
        # Import here to avoid circular dependency
        from tts_interface import create_tts_provider
        
        tts_provider = create_tts_provider(tts_engine, api_key)
        if not tts_provider:
            raise HTTPException(status_code=500, detail="Failed to create TTS provider")
        
        log(f"🎤 Generating TTS for {len(request.text)} characters using {tts_engine}")
        log(f"📝 Voice: {request.voice_id}, Model: {request.model_id}, Format: {request.output_format}")
        
        # Generate audio
        audio_data = await tts_provider.synthesize(
            text=request.text,
            voice_id=request.voice_id,
            model_id=request.model_id,
            output_format=request.output_format
        )
        
        # Return audio data
        from fastapi.responses import Response
        
        content_type = "audio/mpeg" if request.output_format and request.output_format.startswith("mp3") else "audio/wav"
        
        return Response(
            content=audio_data,
            media_type=content_type,
            headers={
                "Content-Disposition": f"attachment; filename=tts_output.{request.output_format.split('_')[0] if request.output_format else 'mp3'}"
            }
        )
        
    except HTTPException:
        raise
    except Exception as e:
        log(f"❌ TTS generation error: {str(e)}")
        import traceback
        log(traceback.format_exc())
        raise HTTPException(status_code=500, detail=f"TTS generation failed: {str(e)}")

        
# ===================== Activity Log Endpoints =====================
@router.get("/activity-log")
async def get_activity_log(
    limit: int = Query(100, ge=1, le=1000),
    username: str = Depends(verify_token)
):
    """Get activity log"""
    config = load_config()
    logs = config.get("activity_log", [])
    
    # Return latest entries (format as paginated response if needed)
    return logs[-limit:]

# ===================== Cleanup Task =====================
def cleanup_old_logs():
    """Cleanup old activity logs (runs in background)"""
    while True:
        try:
            config = load_config()
            if "activity_log" in config and len(config["activity_log"]) > 5000:
                # Keep only last 1000 entries
                config["activity_log"] = config["activity_log"][-1000:]
                save_config(config)
                log("🧹 Cleaned up old activity logs")
        except Exception as e:
            log(f"Error in cleanup task: {e}")
        
        # Run every hour
        time.sleep(3600)

def start_cleanup_task():
    """Start cleanup task in background"""
    cleanup_thread = threading.Thread(target=cleanup_old_logs, daemon=True)
    cleanup_thread.start()
    log("🧹 Started activity log cleanup task")