from fastapi import FastAPI, HTTPException, status, Depends, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse
from fastapi.security import OAuth2PasswordRequestForm

from pydantic import EmailStr

from . import pydentic, JWT, password
from server.database import db

from datetime import datetime, timedelta
import asyncio

api = FastAPI()
from dotenv import load_dotenv                              #Работа с env для CORS
import os
load_dotenv()
origins = os.getenv("ALLOW_ORIGINS").split(",")
credentials = os.getenv("ALLOW_CREDENTIALS").lower() == "true"
methods = os.getenv("ALLOW_METHODS").split(",")
headers = os.getenv("ALLOW_HEADERS").split(",")
api.add_middleware(
    CORSMiddleware,
    allow_origins=origins,
    allow_credentials=credentials,
    allow_methods=methods,
    allow_headers=headers,
)

@api.get("/protected")                                      #test
async def protected(current_user: str = Depends(JWT.current_user)):
    return {"msg": f"Hello, {current_user}"}

@api.get("/", response_model=list[pydentic.UserOut])  #список!
async def get_all_rows(current_user: str = Depends(JWT.current_user)):
    users = await db.get_all_rows()
    if not user:
        raise HTTPException(status_code=401, detail="The user isn't found")
    return users
@api.get("/get_user_by_email/{email}", response_model=pydentic.UserOut)
async def get_user_by_email(email:str, current_user: str = Depends(JWT.current_user)):
    user = await db.get_user_by_email(email)
    if user:
        return user
    else:
        raise HTTPException(status_code=401, detail="The user isn't found")
@api.post("/user_create", response_model=pydentic.UserOut)
async def create_user(row:pydentic.CreateUser):
    new_row = pydentic.CreateUser(email=row.email, description=row.description, activated = row.activated, password = row.password)
    try:
        await db.create_user(new_row)
    except:
        raise HTTPException(status_code=409, detail="User with this email already exists")
    return new_row
@api.delete("/user_delete/{email}", response_model=pydentic.UserOut)
async def delete_user(email:str,current_user: str = Depends(JWT.current_user)):
    user = await db.get_user_by_email(email)
    if not user:
        raise HTTPException(status_code=401, detail="The user isn't found")
    await db.delete_user(email)
    return user
@api.put("/user_update/{email}", response_model=pydentic.UserOut)
async def update_user(email:str, updated_row: pydentic.UserUpdate, current_user: str = Depends(JWT.current_user)):
    user = await db.get_user_by_email(email)
    if not user:
        raise HTTPException(status_code=401, detail="The user isn't found")
    changed = False
    if updated_row.email is not None and updated_row.email != user.email:
        user.email = updated_row.email
        changed = True
    if updated_row.description is not None and updated_row.description != user.description:
        user.description = updated_row.description
        changed = True
    if updated_row.activated is not None and updated_row.activated != user.activated:
        user.activated = updated_row.activated
        changed = True
    if updated_row.password is not None and updated_row.password != user.password:
        user.password = updated_row.password
        changed = True
    if changed:
        await db.update_user(user)
    else:
        pass
    return user
@api.post("/login")
async def login_user(form_data: OAuth2PasswordRequestForm = Depends()):
    try:    
        creds = pydentic.UserLogin(email=form_data.username, password=form_data.password)
    except:
        raise HTTPException(status_code=422, detail="Email is not a valid email address")
    user = await db.login_user(creds)
    if not user:
        raise HTTPException(status_code=401, detail="The user isn't found")
    access_token = await JWT.AccessToken.create(
        {"sub": user.email},
        timedelta(minutes=JWT.ACCESS_TOKEN_EXPIRE_MINUTES)
    )
    return {"access_token": access_token, "token_type": "bearer"}
@api.post("/reset", response_model=pydentic.UserOut)
async def reset_user(row:pydentic.UserReset):
    user = await db.get_user_by_email(row.email)
    if not user:
        raise HTTPException(status_code=401, detail="The user isn't found")
    new_password = password.generate_password()
    new_row = pydentic.UserReset(email=row.email, new_password=new_password)
    password.send_password(new_row)
    user = await db.reset_user(new_row)
    return user