"""
Flare – Prompt Builder  (v6 · date handling)
==============================================================
"""

from typing import List, Dict
from datetime import datetime, timedelta
from utils import log
from config_provider import ConfigProvider

# Date helper for Turkish date expressions
def _get_date_context() -> Dict[str, str]:
    """Generate date context for Turkish date expressions"""
    now = datetime.now()
    
    # Weekday names in Turkish
    weekdays_tr = ["Pazartesi", "Salı", "Çarşamba", "Perşembe", "Cuma", "Cumartesi", "Pazar"]
    today_weekday = weekdays_tr[now.weekday()]
    
    # Calculate various dates
    dates = {
        "today": now.strftime("%Y-%m-%d"),
        "tomorrow": (now + timedelta(days=1)).strftime("%Y-%m-%d"),
        "day_after_tomorrow": (now + timedelta(days=2)).strftime("%Y-%m-%d"),
        "this_weekend_saturday": (now + timedelta(days=(5-now.weekday())%7)).strftime("%Y-%m-%d"),
        "this_weekend_sunday": (now + timedelta(days=(6-now.weekday())%7)).strftime("%Y-%m-%d"),
        "next_week_same_day": (now + timedelta(days=7)).strftime("%Y-%m-%d"),
        "two_weeks_later": (now + timedelta(days=14)).strftime("%Y-%m-%d"),
        "today_weekday": today_weekday,
        "today_day": now.day,
        "today_month": now.month,
        "today_year": now.year
    }
    
    return dates


# ─────────────────────────────────────────────────────────────────────────────
# INTENT PROMPT
# ─────────────────────────────────────────────────────────────────────────────
def build_intent_prompt(general_prompt: str,
                        conversation: List[Dict[str, str]],
                        user_input: str,
                        intents: List,
                        project_name: str = None) -> str:
    
    # Get config when needed
    cfg = ConfigProvider.get()
    
    # Get internal prompt from config
    internal_prompt = cfg.global_config.internal_prompt or ""
    
    # Extract intent names and captions
    intent_names = [it.name for it in intents]
    intent_captions = [it.caption or it.name for it in intents]
    
    # Get project language
    project_language = "Turkish"  # Default
    if project_name:
        project = next((p for p in cfg.projects if p.name == project_name), None)
        if project:
            # Language code'u language name'e çevir
            lang_map = {
                "tr": "Turkish",
                "en": "English", 
                "de": "German",
                "fr": "French",
                "es": "Spanish"
            }
            project_language = lang_map.get(project.default_language, "Turkish")
    
    # Replace placeholders in internal prompt
    if internal_prompt:
        # Intent names - tırnak içinde ve virgülle ayrılmış
        intent_names_str = ', '.join([f'"{name}"' for name in intent_names])
        internal_prompt = internal_prompt.replace("<intent names>", intent_names_str)
        
        # Intent captions - tırnak içinde ve virgülle ayrılmış
        intent_captions_str = ', '.join([f'"{caption}"' for caption in intent_captions])
        internal_prompt = internal_prompt.replace("<intent captions>", intent_captions_str)
        
        # Project language
        internal_prompt = internal_prompt.replace("<project language>", project_language)

    # === INTENT INDEX ===
    lines = ["### INTENT INDEX ###"]
    for it in intents:
        # IntentConfig object attribute access
        det = it.detection_prompt.strip() if it.detection_prompt else ""
        det_part = f'  • detection_prompt → "{det}"' if det else ""
        exs = " | ".join(it.examples) if it.examples else ""
        ex_part = f"  • examples → {exs}" if exs else ""

        newline_between = "\n" if det_part and ex_part else ""
        lines.append(f"{it.name}:{det_part}{newline_between}{ex_part}")

    intent_index = "\n".join(lines)

    # === HISTORY ===
    history_block = "\n".join(
        f"{m['role'].upper()}: {m['content']}" for m in conversation[-10:]
    )

    # Combine prompts
    combined_prompt = internal_prompt + "\n\n" + general_prompt if internal_prompt else general_prompt

    prompt = (
        f"{combined_prompt}\n\n"
        f"{intent_index}\n\n"
        f"Conversation so far:\n{history_block}\n\n"
        f"USER: {user_input.strip()}"
    )
    log("✅ Intent prompt built (with internal prompt)")
    return prompt

# ─────────────────────────────────────────────────────────────────────────────
# RESPONSE PROMPT
# ─────────────────────────────────────────────────────────────────────────────
def build_api_response_prompt(api_config, api_response: Dict) -> str:
    """Build prompt for API response with mappings"""
    
    response_prompt = api_config.response_prompt or "API yanıtını kullanıcıya açıkla:"
    
    # Response mappings varsa, mapping bilgilerini ekle
    if api_config.response_mappings:
        mapping_info = []
        
        for mapping in api_config.response_mappings:
            # JSON path'e göre değeri bul
            value = extract_value_from_json_path(api_response, mapping.json_path)
            if value is not None:
                # Type'a göre formatlama
                if mapping.type == "date":
                    # ISO date'i Türkçe formata çevir
                    try:
                        dt = datetime.fromisoformat(value.replace('Z', '+00:00'))
                        value = dt.strftime("%d %B %Y %H:%M")
                    except:
                        pass
                elif mapping.type == "float":
                    try:
                        value = f"{float(value):,.2f}"
                    except:
                        pass
                
                mapping_info.append(f"{mapping.caption}: {value}")
        
        if mapping_info:
            # Response prompt'a mapping bilgilerini ekle
            mapping_text = "\n\nÖnemli Bilgiler:\n" + "\n".join(f"• {info}" for info in mapping_info)
            response_prompt = response_prompt.replace("{{api_response}}", f"{{{{api_response}}}}{mapping_text}")
    
    # API response'u JSON string olarak ekle
    response_json = json.dumps(api_response, ensure_ascii=False, indent=2)
    final_prompt = response_prompt.replace("{{api_response}}", response_json)
    
    return final_prompt

def extract_value_from_json_path(data: Dict, path: str):
    """Extract value from JSON using dot notation path"""
    try:
        parts = path.split('.')
        value = data
        for part in parts:
            if isinstance(value, dict):
                value = value.get(part)
            elif isinstance(value, list) and part.isdigit():
                value = value[int(part)]
            else:
                return None
        return value
    except:
        return None
# ─────────────────────────────────────────────────────────────────────────────
# PARAMETER PROMPT
# ─────────────────────────────────────────────────────────────────────────────
_FMT = """#PARAMETERS:{"extracted":[{"name":"<param>","value":"<val>"},...],"missing":["<param>",...]}"""

def build_parameter_prompt(intent_cfg,
                           missing_params: List[str],
                           user_input: str,
                           conversation: List[Dict[str, str]]) -> str:
    
    date_ctx = _get_date_context()
    
    parts: List[str] = [
        "You are extracting parameters from user messages in TURKISH.",
        f"Today is {date_ctx['today']} ({date_ctx['today_weekday']}). Tomorrow is {date_ctx['tomorrow']}.",
        "Extract ONLY the parameters listed below from the conversation.",
        "Look at BOTH the current message AND previous messages to find parameter values.",
        "If a parameter cannot be found, is invalid, or wasn't provided, keep it in the \"missing\" list.",
        "Never guess or make up values. Only extract values explicitly given by the user.",
        "",
        "IMPORTANT: If the user is NOT providing the requested parameter but instead:",
        "- Asking for recommendations or advice (e.g. 'nereye gitsem?', 'önerin var mı?')",
        "- Expressing uncertainty (e.g. 'tam net değil', 'emin değilim', 'bilmiyorum')",
        "- Changing the subject or asking something else",
        "Then DO NOT extract any value for that parameter. Keep it in the 'missing' list.",
        ""
    ]
    
    # Add parameter descriptions
    parts.append("Parameters to extract:")
    for p in intent_cfg.parameters:
        if p.name in missing_params:
            # Special handling for date type parameters
            if p.type == "date":
                date_prompt = (
                    f"• {p.name}: {p.extraction_prompt}\n"
                    f"  IMPORTANT DATE RULES:\n"
                    f"  - 'bugün' = {date_ctx['today']}\n"
                    f"  - 'yarın' = {date_ctx['tomorrow']}\n"
                    f"  - 'öbür gün' = {date_ctx['day_after_tomorrow']}\n"
                    f"  - 'bu hafta sonu' = {date_ctx['this_weekend_saturday']} or {date_ctx['this_weekend_sunday']}\n"
                    f"  - 'bu cumartesi' = {date_ctx['this_weekend_saturday']}\n"
                    f"  - 'bu pazar' = {date_ctx['this_weekend_sunday']}\n"
                    f"  - 'haftaya' or 'gelecek hafta' = add 7 days to current date\n"
                    f"  - 'haftaya bugün' = {date_ctx['next_week_same_day']}\n"
                    f"  - 'iki hafta sonra' = {date_ctx['two_weeks_later']}\n"
                    f"  - '15 gün sonra' = add 15 days to today\n"
                    f"  - '10 Temmuz' = {date_ctx['today_year']}-07-10\n"
                    f"  - Turkish months: Ocak=01, Şubat=02, Mart=03, Nisan=04, Mayıs=05, Haziran=06, "
                    f"Temmuz=07, Ağustos=08, Eylül=09, Ekim=10, Kasım=11, Aralık=12"
                )
                parts.append(date_prompt)
            else:
                parts.append(f"• {p.name}: {p.extraction_prompt}")
    
    # Add format instruction
    parts.append("")
    parts.append("IMPORTANT: Your response must start with '#PARAMETERS:' followed by the JSON.")
    parts.append("Return ONLY this format with no extra text before or after:")
    parts.append(_FMT)
    
    # Add conversation history
    history_block = "\n".join(
        f"{m['role'].upper()}: {m['content']}" for m in conversation[-10:]
    )
    
    prompt = (
        "\n".join(parts) + 
        "\n\nConversation so far:\n" + history_block +
        "\n\nUSER: " + user_input.strip()
    )
    
    log(f"📝 Parameter prompt built for missing: {missing_params}")
    return prompt