#main.py

from fastapi import FastAPI, Form, Depends, HTTPException
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
from datetime import timedelta
#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),
 #   token: str = Depends(oauth2_scheme)  # Check if the user has a valid token
):
 #   if token:
        # If the user already has a valid token, redirect to protected.html
 #       return templates.TemplateResponse("protected.html", {"request": request, "user": token})

    # Validate the email and password
    if not email or not password:
        raise HTTPException(status_code=400, detail="Invalid email or password")

    # Check user authentication using the provided email and password
    user = authenticate_user(db, email, password)

    if user is not None:
        # Authentication succeeded
        # Create an access token and handle login success
        access_token = auth_views.create_access_token(
            data={"sub": user.email},
            expires_delta=timedelta(minutes=auth_views.ACCESS_TOKEN_EXPIRE_MINUTES),
        )

        # Set the access_token (if desired)
        user.token = access_token

        # Commit the changes to the database
        db.commit()

        # Handle the login success as needed
        return templates.TemplateResponse("protected.html", {"request": request, "user": user.username})
    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"})

@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)
):
    if password != confirm_password:
        # Return to the registration page with an error
        return templates.TemplateResponse("register.html", {
            "request": request,
            "error_message": "Passwords do not match."
        })

    try:
        user = UserCreate(username=username, email=email, password=password, confirm_password=confirm_password)
        register(user, db)  # If this function raises an HTTPException, it should be handled
    except HTTPException as e:
        # Return to the registration page with the error detail
        return templates.TemplateResponse("register.html", {
            "request": request,
            "error_message": e.detail
        })

    # Redirect to the successful registration page
    response = RedirectResponse("/registration_successful", status_code=status.HTTP_302_FOUND)
    return response
    
    
@app.post("/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_class=HTMLResponse)  # Specify response_class as HTMLResponse
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": user.email})