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

from fastapi import APIRouter
from pydantic import BaseModel
import json

from apps.web.models.users import Users
from apps.web.models.chats import (
    ChatModel,
    ChatResponse,
    ChatTitleForm,
    ChatForm,
    ChatTitleIdResponse,
    Chats,
)

from utils.utils import (
    bearer_scheme,
)
from constants import ERROR_MESSAGES

router = APIRouter()

############################
# GetChats
############################


@router.get("/", response_model=List[ChatTitleIdResponse])
async def get_user_chats(request:Request, skip: int = 0, limit: int = 50):
    return Chats.get_chat_lists_by_user_id(request.user.id, skip, limit)


############################
# GetAllChats
############################


@router.get("/all", response_model=List[ChatResponse])
async def get_all_user_chats(request:Request,):
    return [
            ChatResponse(**{**chat.model_dump(), "chat": json.loads(chat.chat)})
            for chat in Chats.get_all_chats_by_user_id(request.user.id)
        ]


############################
# CreateNewChat
############################


@router.post("/new", response_model=Optional[ChatResponse])
async def create_new_chat(form_data: ChatForm,request:Request):
    chat = Chats.insert_new_chat(request.user.id, form_data)
    return ChatResponse(**{**chat.model_dump(), "chat": json.loads(chat.chat)})


############################
# GetChatById
############################


@router.get("/{id}", response_model=Optional[ChatResponse])
async def get_chat_by_id(id: str, request:Request):
    chat = Chats.get_chat_by_id_and_user_id(id, request.user.id)

    if chat:
        return ChatResponse(**{**chat.model_dump(), "chat": json.loads(chat.chat)})
    else:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED,
                            detail=ERROR_MESSAGES.NOT_FOUND)


############################
# UpdateChatById
############################


@router.post("/{id}", response_model=Optional[ChatResponse])
async def update_chat_by_id(id: str, form_data: ChatForm, request:Request):
    chat = Chats.get_chat_by_id_and_user_id(id, request.user.id)
    if chat:
            updated_chat = {**json.loads(chat.chat), **form_data.chat}

            chat = Chats.update_chat_by_id(id, updated_chat)
            return ChatResponse(**{**chat.model_dump(), "chat": json.loads(chat.chat)})
    else:
            raise HTTPException(
                status_code=status.HTTP_401_UNAUTHORIZED,
                detail=ERROR_MESSAGES.ACCESS_PROHIBITED,
            )


############################
# DeleteChatById
############################


@router.delete("/{id}", response_model=bool)
async def delete_chat_by_id(id: str, request: Request):
    result = Chats.delete_chat_by_id_and_user_id(id, request.user.id)
    return result