from fastapi import Response, Request
from fastapi import Depends, FastAPI, HTTPException, status
from datetime import datetime, timedelta
from typing import List, Union

from fastapi import APIRouter, status
from pydantic import BaseModel
import time
import uuid
import re

from apps.web.models.auths import (
    SigninForm,
    SignupForm,
    UpdateProfileForm,
    UpdatePasswordForm,
    UserResponse,
    SigninResponse,
    Auths,
)
from apps.web.models.users import Users

from utils.utils import (
    get_password_hash,
    get_current_user,
    get_admin_user,
    create_token,
)
from utils.misc import parse_duration, validate_email_format
from utils.webhook import post_webhook
from constants import ERROR_MESSAGES, WEBHOOK_MESSAGES
from config import WEBUI_AUTH_TRUSTED_EMAIL_HEADER

router = APIRouter()

############################
# GetSessionUser
############################


@router.get("/", response_model=UserResponse)
async def get_session_user(user=Depends(get_current_user)):
    return {
        "id": user.id,
        "email": user.email,
        "name": user.name,
        "role": user.role,
        "profile_image_url": user.profile_image_url,
    }


############################
# Update Profile
############################


@router.post("/update/profile", response_model=UserResponse)
async def update_profile(
    form_data: UpdateProfileForm, session_user=Depends(get_current_user)
):
    if session_user:
        user = Users.update_user_by_id(
            session_user.id,
            {"profile_image_url": form_data.profile_image_url, "name": form_data.name},
        )
        if user:
            return user
        else:
            raise HTTPException(400, detail=ERROR_MESSAGES.DEFAULT())
    else:
        raise HTTPException(400, detail=ERROR_MESSAGES.INVALID_CRED)


############################
# Update Password
############################


@router.post("/update/password", response_model=bool)
async def update_password(
    form_data: UpdatePasswordForm, session_user=Depends(get_current_user)
):
    if WEBUI_AUTH_TRUSTED_EMAIL_HEADER:
        raise HTTPException(400, detail=ERROR_MESSAGES.ACTION_PROHIBITED)
    if session_user:
        user = Auths.authenticate_user(session_user.email, form_data.password)

        if user:
            hashed = get_password_hash(form_data.new_password)
            return Auths.update_user_password_by_id(user.id, hashed)
        else:
            raise HTTPException(400, detail=ERROR_MESSAGES.INVALID_PASSWORD)
    else:
        raise HTTPException(400, detail=ERROR_MESSAGES.INVALID_CRED)


############################
# SignIn
############################


@router.post("/signin", response_model=SigninResponse)
async def signin(request: Request, form_data: SigninForm):
    if WEBUI_AUTH_TRUSTED_EMAIL_HEADER:
        if WEBUI_AUTH_TRUSTED_EMAIL_HEADER not in request.headers:
            raise HTTPException(400,
                                detail=ERROR_MESSAGES.INVALID_TRUSTED_HEADER)
        trusted_email = request.headers[WEBUI_AUTH_TRUSTED_EMAIL_HEADER].lower(
        )
        user = Auths.authenticate_user_by_trusted_header(trusted_email)
    else:
        user = Auths.authenticate_user(form_data.email.lower(),
                                       form_data.password)
    if user:
        token = create_token(
            data={"id": user.id},
            expires_delta=parse_duration(request.app.state.JWT_EXPIRES_IN),
        )

        return {
            "token": token,
            "token_type": "Bearer",
            "id": user.id,
            "email": user.email,
            "name": user.name,
            "role": user.role,
            "profile_image_url": user.profile_image_url,
        }
    else:
        raise HTTPException(400, detail=ERROR_MESSAGES.INVALID_CRED)


############################
# SignUp
############################


@router.post("/signup", response_model=SigninResponse)
async def signup(request: Request, form_data: SignupForm):
    if not request.app.state.ENABLE_SIGNUP:
        raise HTTPException(
            status.HTTP_403_FORBIDDEN, detail=ERROR_MESSAGES.ACCESS_PROHIBITED
        )

    if not validate_email_format(form_data.email.lower()):
        raise HTTPException(
            status.HTTP_400_BAD_REQUEST, detail=ERROR_MESSAGES.INVALID_EMAIL_FORMAT
        )

    if Users.get_user_by_email(form_data.email.lower()):
        raise HTTPException(400, detail=ERROR_MESSAGES.EMAIL_TAKEN)

    if WEBUI_AUTH_TRUSTED_EMAIL_HEADER:
        if WEBUI_AUTH_TRUSTED_EMAIL_HEADER not in request.headers:
            raise HTTPException(400,
                                detail=ERROR_MESSAGES.INVALID_TRUSTED_HEADER)
        trusted_email = request.headers[WEBUI_AUTH_TRUSTED_EMAIL_HEADER].lower(
        )
        if trusted_email != form_data.email:
            raise HTTPException(400, detail=ERROR_MESSAGES.EMAIL_MISMATCH)
        # TODO: Yolo hack to assign a password
        form_data.password = str(uuid.uuid4())

    try:
        role = (
            "admin"
            if Users.get_num_users() == 0
            else request.app.state.DEFAULT_USER_ROLE
        )
        hashed = get_password_hash(form_data.password)
        user = Auths.insert_new_auth(
            form_data.email.lower(), hashed, form_data.name, role
        )

        if user:
            token = create_token(
                data={"id": user.id},
                expires_delta=parse_duration(request.app.state.JWT_EXPIRES_IN),
            )
            # response.set_cookie(key='token', value=token, httponly=True)

            if request.app.state.WEBHOOK_URL:
                post_webhook(
                    request.app.state.WEBHOOK_URL,
                    WEBHOOK_MESSAGES.USER_SIGNUP(user.name),
                    {
                        "action": "signup",
                        "message": WEBHOOK_MESSAGES.USER_SIGNUP(user.name),
                        "user": user.model_dump_json(exclude_none=True),
                    },
                )

            return {
                "token": token,
                "token_type": "Bearer",
                "id": user.id,
                "email": user.email,
                "name": user.name,
                "role": user.role,
                "profile_image_url": user.profile_image_url,
            }
        else:
            raise HTTPException(500, detail=ERROR_MESSAGES.CREATE_USER_ERROR)
    except Exception as err:
        raise HTTPException(500, detail=ERROR_MESSAGES.DEFAULT(err))


############################
# ToggleSignUp
############################


@router.get("/signup/enabled", response_model=bool)
async def get_sign_up_status(request: Request, user=Depends(get_admin_user)):
    return request.app.state.ENABLE_SIGNUP


@router.get("/signup/enabled/toggle", response_model=bool)
async def toggle_sign_up(request: Request, user=Depends(get_admin_user)):
    request.app.state.ENABLE_SIGNUP = not request.app.state.ENABLE_SIGNUP
    return request.app.state.ENABLE_SIGNUP


############################
# Default User Role
############################


@router.get("/signup/user/role")
async def get_default_user_role(request: Request, user=Depends(get_admin_user)):
    return request.app.state.DEFAULT_USER_ROLE


class UpdateRoleForm(BaseModel):
    role: str


@router.post("/signup/user/role")
async def update_default_user_role(
    request: Request, form_data: UpdateRoleForm, user=Depends(get_admin_user)
):
    if form_data.role in ["pending", "user", "admin"]:
        request.app.state.DEFAULT_USER_ROLE = form_data.role
    return request.app.state.DEFAULT_USER_ROLE


############################
# JWT Expiration
############################


@router.get("/token/expires")
async def get_token_expires_duration(request: Request, user=Depends(get_admin_user)):
    return request.app.state.JWT_EXPIRES_IN


class UpdateJWTExpiresDurationForm(BaseModel):
    duration: str


@router.post("/token/expires/update")
async def update_token_expires_duration(
    request: Request,
    form_data: UpdateJWTExpiresDurationForm,
    user=Depends(get_admin_user),
):
    pattern = r"^(-1|0|(-?\d+(\.\d+)?)(ms|s|m|h|d|w))$"

    # Check if the input string matches the pattern
    if re.match(pattern, form_data.duration):
        request.app.state.JWT_EXPIRES_IN = form_data.duration
        return request.app.state.JWT_EXPIRES_IN
    else:
        return request.app.state.JWT_EXPIRES_IN