from fastapi import APIRouter, HTTPException, status, Depends
from .Schema import (
    RegisterUserRequest,
    LoginUserRequest,
    AccessTokenResponse,
    ForgotPasswordRequest,
    VerifyResetTokenRequest,
    ResetPasswordRequest,
    BaseResponse,
    UserResponse,
)
from .Model import User
from jose import jwt
from typing import List
from datetime import datetime, timedelta
from App.Subscriptions.Model import Subscription
from App.Android.Android import AndroidClient
from App.Android.Schema import RegisterUserRequest as AndroidRegister
from App.Templates.Templates import MessageTemplate
from .dependencies import get_current_active_user

# JWT Configurations
SECRET_KEY = "your_secret_key_here"
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30
user_router = APIRouter(tags=["User"])
client = AndroidClient()
templates = MessageTemplate()


def create_access_token(data: dict, expires_delta: timedelta = None):
    to_encode = data.copy()
    expire = datetime.utcnow() + (
        expires_delta or timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
    )
    to_encode.update({"exp": expire})
    return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)


# The user registers
# It sends userdetails to the router
# It sends the user a message to welcome the user


@user_router.post(
    "/user/register", response_model=BaseResponse, status_code=status.HTTP_201_CREATED
)
async def register_user(request: RegisterUserRequest):
    existing_user = await User.filter(phoneNumber=request.phoneNumber).first()
    if existing_user:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST, detail="User already exists."
        )

    new_user = await User.create_user(request.dict())
    return BaseResponse(
        code=200, message="User created successfully", payload={"user_id": new_user.id}
    )


@user_router.post(
    "/user/login", response_model=AccessTokenResponse, status_code=status.HTTP_200_OK
)
async def login_user(request: LoginUserRequest):
    # Find user by phone number
    db_user = await User.filter(phoneNumber=request.phoneNumber).first()
    valid_password = await db_user.verify_password(request.password)
    # Check if user exists and password is correct
    if db_user and valid_password:
        # Fetch active subscription if it exists
        subscription = await Subscription.filter(user=db_user, active=True).first()

        # Handle case when no active subscription is found
        subscription_end = subscription.expiration_time if subscription else None

        access_token = create_access_token(
            data={
                "user_name": db_user.name,
                "sub": db_user.phoneNumber,
                "locked": db_user.account_locked,
                "userId": db_user.id,
                "subscription_end": subscription_end,
            }
        )
        return AccessTokenResponse(access_token=access_token, token_type="bearer")

    # Raise an error if credentials are invalid
    raise HTTPException(
        status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid credentials"
    )


@user_router.post(
    "/user/forgot-password", response_model=BaseResponse, status_code=status.HTTP_200_OK
)
async def forgot_password(request: ForgotPasswordRequest):
    user = await User.filter(phoneNumber=request.phoneNumber).first()
    if not user:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="User not found."
        )
    await user.initiate_password_reset()
    return BaseResponse(code=200, message="Password reset token sent to your phone.")


@user_router.post(
    "/user/verify-reset-token",
    response_model=BaseResponse,
    status_code=status.HTTP_200_OK,
)
async def verify_reset_token(request: VerifyResetTokenRequest):
    user = await User.filter(
        phoneNumber=request.phoneNumber, reset_token=request.reset_token
    ).first()
    if not user or datetime.utcnow() > user.reset_token_expiration:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid or expired token."
        )
    return BaseResponse(code=200, message="Token verified. Proceed to reset password.")


@user_router.post(
    "/user/reset-password", response_model=BaseResponse, status_code=status.HTTP_200_OK
)
async def reset_password(request: ResetPasswordRequest):
    user = await User.filter(phoneNumber=request.phoneNumber).first()
    if not user:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="User not found."
        )
    if not await user.reset_password(request.reset_token, request.new_password):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid or expired token."
        )
    return BaseResponse(code=200, message="Password has been reset successfully.")


@user_router.get(
    "/user/all", response_model=List[UserResponse], status_code=status.HTTP_200_OK
)
async def get_all_users():
    users = await User.all()
    return [UserResponse.from_orm(user) for user in users]


@user_router.delete(
    "/user/{user_id}", response_model=BaseResponse, status_code=status.HTTP_200_OK
)
async def delete_user(user_id: str):
    user = await User.filter(id=user_id).first()
    if not user:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="User not found."
        )
    await user.delete()
    return BaseResponse(code=200, message="User deleted successfully.")


@user_router.put(
    "/user/toggle_status/{user_id}",
    response_model=BaseResponse,
    status_code=status.HTTP_200_OK,
)
async def toggle_user_status(user_id: str):
    user = await User.filter(id=user_id).first()
    if not user:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="User not found."
        )
    user.account_locked = not user.account_locked
    await user.save()
    message = (
        "User disabled successfully."
        if user.account_locked
        else "User enabled successfully."
    )
    return BaseResponse(code=200, message=message)


@user_router.get(
    "/user/me", response_model=UserResponse, status_code=status.HTTP_200_OK
)
async def get_user_details(current_user: User = Depends(get_current_active_user)):
    """
    Get the current user's details and balance.
    """
    return UserResponse.from_orm(current_user)