#main.py

from fastapi import FastAPI, Form, Depends, HTTPException, APIRouter
from fastapi.requests import Request
from fastapi.responses import HTMLResponse, RedirectResponse
from fastapi.templating import Jinja2Templates
from sqlalchemy.orm import Session
from auth import verify_token, oauth2_scheme, auth_views, register, UserCreate, authenticate_user, get_user_by_verification_token
from database import get_db, get_user_by_email
#import auth
#import tts
import os

my_secret_key = os.environ['my_secret_key']
app = FastAPI()
#router = APIRouter()
templates = Jinja2Templates(directory="templates")

# Include the authentication router with the prefix '/auth'
#app.include_router(auth.router, prefix="")

# Include the TTS router with the prefix '/tts'
#app.include_router(tts.router, prefix="/tts")

# Dependency for verifying the user's token
def get_current_user(token: str = Depends(verify_token)):
    if not token:
        raise HTTPException(status_code=401, detail="Token not valid")
    return token
# Route for the landing page
@app.get("/", response_class=HTMLResponse)
async def landing(request: Request):
    return templates.TemplateResponse("landing.html", {"request": request})

# Your other routes and app configuration go here

@app.get("/login", response_class=HTMLResponse)
async def login(request: Request):
    return templates.TemplateResponse("login.html", {"request": request})


@app.post("/login", response_class=HTMLResponse)
async def login_post(
    request: Request,
    email: str = Form(...),
    password: str = Form(...),
    db: Session = Depends(get_db)
):
    # Validate the email and password
    if not email or not password:
        raise HTTPException(status_code=400, detail="Invalid email or password")

    # Check user authentication (You should implement this function)
    user = authenticate_user(db, email, password)
    
    if user is not None:
        # Authentication succeeded
        # Create an access token and handle login success
        # You can use your access token creation logic here
        access_token = auth_views().create_access_token(
            data={"sub": user.email},
            expires_delta=timedelta(minutes=auth_views().ACCESS_TOKEN_EXPIRE_MINUTES),
        )
        # Redirect to a protected page or handle the login success as needed
        return RedirectResponse("/protected")
    else:
        # Authentication failed
        # Handle login failure, e.g., display an error message
        return templates.TemplateResponse("login.html", {"request": request, "error_message": "Invalid email or password"}) 
        #return RedirectResponse("/login?error=Authentication failed")

@app.get("/register", response_class=HTMLResponse)
async def register_get(request: Request):
    return templates.TemplateResponse("register.html", {"request": request})

@app.post("/register", response_class=HTMLResponse)
async def register_post(
    request: Request,
    username: str = Form(...),
    email: str = Form(...),
    password: str = Form(...),
    confirm_password: str = Form(...),
    db: Session = Depends(get_db)
):
    user = UserCreate(username=username, email=email, password=password, confirm_password=confirm_password)
    registered_user = register(user, db)
    return RedirectResponse("/registration_successful")
    
@app.get("/registration_successful", response_class=HTMLResponse)
async def registration_successful(request: Request):
    return templates.TemplateResponse("registration_successful.html", {"request": request})





@app.get("/verify/{verification_token}", response_class=HTMLResponse)
async def verify_email(verification_token: str, request: Request, db: Session = Depends(get_db)):
    # Verify the email using the token
    user = get_user_by_verification_token(db, verification_token)
    
    if not user:
        raise HTTPException(status_code=400, detail="Invalid verification token")

    if user.is_verified:
        raise HTTPException(status_code=400, detail="Email already verified")

    # Mark the email as verified in the database
    user.is_verified = True
    user.email_verification_token = None  # Optionally clear the verification token
    db.commit()

    # Handle a successful verification
  #  return templates.TemplateResponse("verification_successful.html", {"request": request})
    return RedirectResponse("/protected")

# User authentication (protected route)
@app.post("/protected", response_model=str)
async def protected_route(request: Request, token: str = Depends(oauth2_scheme), db: Session = Depends(get_db)):
    # Verify the access token
    user = verify_token(token, my_secret_key, "HS256")
    if user is None:
        raise HTTPException(status_code=401, detail="Invalid or expired token")

    # Check if the user exists in the database
    db_user = get_user_by_email(db, user)  # Modify this to match your database query

    if db_user is None:
        raise HTTPException(status_code=401, detail="User not found in the database")

    # The user exists in the database, and you can render the protected route template
    return templates.TemplateResponse("protected.html", {"request": request, "user": db_user.username})