from fastapi import Depends, Request, HTTPException, status
from datetime import datetime, timedelta
from typing import List, Union, Optional
from utils.utils import get_current_user
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(
    user=Depends(get_current_user), skip: int = 0, limit: int = 50
):
    return Chats.get_chat_lists_by_user_id(user.id, skip, limit)


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


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


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


@router.post("/new", response_model=Optional[ChatResponse])
async def create_new_chat(form_data: ChatForm, user=Depends(get_current_user)):
    chat = Chats.insert_new_chat(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, user=Depends(get_current_user)):
    chat = Chats.get_chat_by_id_and_user_id(id, 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, user=Depends(get_current_user)
):
    chat = Chats.get_chat_by_id_and_user_id(id, 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, user=Depends(get_current_user)):
    result = Chats.delete_chat_by_id_and_user_id(id, user.id)
    return result


############################
# DeleteAllChats
############################


@router.delete("/", response_model=bool)
async def delete_all_user_chats(user=Depends(get_current_user)):
    result = Chats.delete_chats_by_user_id(user.id)
    return result
