from fastapi import APIRouter, Request, Depends, HTTPException
import auth_utils
import db
import schemas
import session_utils
import uuid
from datetime import datetime, timedelta
import locales

router = APIRouter(prefix="/auth", tags=["auth"])

@router.post("/register", response_model=schemas.UserResponse)
async def register(request: Request, user: schemas.UserCreate, lang: str = "en"):
    existing_user = db.execute_query("SELECT id FROM users WHERE email = %s", (user.email,))
    if existing_user:
        raise HTTPException(status_code=400, detail=locales.translate_error("email_already_registered", lang))
    
    ip_address = request.client.host if request.client else None
    hashed_password = auth_utils.get_password_hash(user.password)
    
    query = """
    INSERT INTO users (email, password_hash, first_name, last_name, phone, shipping_address, preferred_language, role, ip_address)
    VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s)
    """
    params = (user.email, hashed_password, user.first_name, user.last_name, user.phone, user.shipping_address, user.preferred_language, 'user', ip_address)
    
    user_id = db.execute_commit(query, params)
    new_user = db.execute_query("SELECT id, email, first_name, last_name, phone, shipping_address, preferred_language, role, ip_address, created_at FROM users WHERE id = %s", (user_id,))
    return new_user[0]

@router.post("/login", response_model=schemas.Token)
async def login(user_data: schemas.UserLogin, lang: str = "en"):
    user = db.execute_query("SELECT * FROM users WHERE email = %s", (user_data.email,))
    if not user or not auth_utils.verify_password(user_data.password, user[0]['password_hash']):
        raise HTTPException(status_code=401, detail=locales.translate_error("incorrect_credentials", lang))
    
    access_token = auth_utils.create_access_token(
        data={"sub": user[0]['email'], "id": user[0]['id'], "role": user[0]['role']}
    )
    return {"access_token": access_token, "token_type": "bearer"}

@router.post("/social-login", response_model=schemas.Token)
async def social_login(request: Request, data: schemas.SocialLogin):
    user = db.execute_query("SELECT id, email, role FROM users WHERE email = %s", (data.email,))
    if user:
        access_token = auth_utils.create_access_token(
            data={"sub": user[0]['email'], "id": user[0]['id'], "role": user[0]['role']}
        )
        return {"access_token": access_token, "token_type": "bearer"}
    else:
        ip_address = request.client.host if request.client else None
        hashed_password = auth_utils.get_password_hash(str(uuid.uuid4()))
        query = "INSERT INTO users (email, password_hash, first_name, last_name, preferred_language, role, ip_address) VALUES (%s, %s, %s, %s, %s, %s, %s)"
        params = (data.email, hashed_password, data.first_name, data.last_name, data.preferred_language, 'user', ip_address)
        user_id = db.execute_commit(query, params)
        access_token = auth_utils.create_access_token(data={"sub": data.email, "id": user_id, "role": 'user'})
        return {"access_token": access_token, "token_type": "bearer"}

@router.post("/logout")
async def logout(token: str = Depends(auth_utils.oauth2_scheme)):
    payload = auth_utils.decode_token(token)
    if payload:
        sid = payload.get("sid")
        if sid: session_utils.delete_session(sid)
    return {"message": "Successfully logged out"}

@router.post("/forgot-password")
async def forgot_password(request: schemas.ForgotPassword):
    user = db.execute_query("SELECT id FROM users WHERE email = %s", (request.email,))
    if not user: raise HTTPException(status_code=404, detail="Email not found")
    token = str(uuid.uuid4())
    expires_at = datetime.utcnow() + timedelta(minutes=15)
    db.execute_commit("INSERT INTO password_reset_tokens (user_id, token, expires_at) VALUES (%s, %s, %s)", (user[0]['id'], token, expires_at))
    return {"message": "Reset instructions sent to your email", "demo_token": token}

@router.post("/reset-password")
async def reset_password(request: schemas.ResetPassword):
    reset_data = db.execute_query("SELECT user_id, expires_at FROM password_reset_tokens WHERE token = %s", (request.token,))
    if not reset_data: raise HTTPException(status_code=400, detail="Invalid token")
    if reset_data[0]['expires_at'] < datetime.utcnow(): raise HTTPException(status_code=400, detail="Token expired")
    hashed_password = auth_utils.get_password_hash(request.new_password)
    db.execute_commit("UPDATE users SET password_hash = %s WHERE id = %s", (hashed_password, reset_data[0]['user_id']))
    db.execute_commit("DELETE FROM password_reset_tokens WHERE token = %s", (request.token,))
    return {"message": "Password reset successfully"}

@router.get("/me", response_model=schemas.UserResponse)
async def get_me(token: str = Depends(auth_utils.oauth2_scheme)):
    payload = auth_utils.decode_token(token)
    if not payload: raise HTTPException(status_code=401, detail="Invalid token")
    user = db.execute_query("SELECT id, email, first_name, last_name, phone, shipping_address, preferred_language, role, ip_address, created_at FROM users WHERE id = %s", (payload.get("id"),))
    if not user: raise HTTPException(status_code=404, detail="User not found")
    return user[0]

@router.put("/me", response_model=schemas.UserResponse)
async def update_me(data: schemas.UserUpdate, token: str = Depends(auth_utils.oauth2_scheme)):
    payload = auth_utils.decode_token(token)
    if not payload: raise HTTPException(status_code=401, detail="Invalid token")
    user_id = payload.get("id")
    update_fields = []
    params = []
    for field, value in data.dict(exclude_unset=True).items():
        update_fields.append(f"{field} = %s")
        params.append(value)
    if update_fields:
        query = f"UPDATE users SET {', '.join(update_fields)} WHERE id = %s"
        params.append(user_id)
        db.execute_commit(query, tuple(params))
    user = db.execute_query("SELECT id, email, first_name, last_name, phone, shipping_address, preferred_language, role, ip_address, created_at FROM users WHERE id = %s", (user_id,))
    return user[0]

@router.post("/ping")
async def track_ping(token: str = Depends(auth_utils.oauth2_scheme)):
    payload = auth_utils.decode_token(token)
    unread_count = 0
    if payload and payload.get("id"):
        user_id = payload.get("id")
        role = payload.get("role")
        session_utils.track_user_ping(user_id)
        
        if role == 'admin':
            row = db.execute_query("SELECT count(*) as cnt FROM order_messages WHERE is_from_admin = FALSE AND is_read = FALSE")
        else:
            row = db.execute_query(
                "SELECT count(*) as cnt FROM order_messages om JOIN orders o ON om.order_id = o.id WHERE o.user_id = %s AND om.is_from_admin = TRUE AND om.is_read = FALSE",
                (user_id,)
            )
        if row:
            unread_count = row[0]['cnt']
            
    return {"status": "ok", "unread_count": unread_count}