from fastapi import FastAPI, Depends, HTTPException, status
from fastapi.middleware.cors import CORSMiddleware
from fastapi.security import OAuth2PasswordRequestForm
from sqlalchemy.orm import Session
from typing import Optional

from app.utils import create_access_token
from . import schemas, crud
from .database import SessionLocal, engine, Base

Base.metadata.create_all(bind=engine)

app = FastAPI()

app.add_middleware(
    CORSMiddleware,
    allow_origins=[
        "http://localhost:3000",
        "http://192.168.125.129:3000",
        "https://192.168.125.129:3000",
        "http://192.168.125.129:8000",
        "https://192.168.125.129:8000",
        "https://site.muszyn.dev",
    ],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


# Dependency
def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


@app.get("/check-health")
def health_check():
    return {"Health": "Super Healthy!"}


@app.post("/blogs/", response_model=schemas.Blog)
def create_blog(
    blog: schemas.BlogCreate,
    db: Session = Depends(get_db),
):
    return crud.create_blog(db, blog)


@app.get("/blogs/", response_model=list[schemas.Blog])
def read_blogs(
    skip: int = 0,
    limit: int = 10,
    author_id: Optional[int] = None,
    db: Session = Depends(get_db),
):
    return crud.get_blogs(
        db,
        skip=skip,
        limit=limit,
        author_id=author_id,
    )


@app.get("/blogs/{blog_id}", response_model=schemas.Blog)
def read_blog(
    blog_id: int,
    db: Session = Depends(get_db),
):
    db_blog = crud.get_blog(db, blog_id)
    if not db_blog:
        raise HTTPException(status_code=404, detail="Blog not found")
    return db_blog


@app.put("/blogs/{blog_id}", response_model=schemas.Blog)
def update_blog(
    blog_id: int,
    blog_in: schemas.BlogUpdate,
    db: Session = Depends(get_db),
):
    updated = crud.update_blog(db, blog_id, blog_in)
    if not updated:
        raise HTTPException(status_code=404, detail="Blog not found")
    return updated


@app.delete("/blogs/{blog_id}", response_model=schemas.Blog)
def delete_blog(
    blog_id: int,
    db: Session = Depends(get_db),
):
    deleted = crud.delete_blog(db, blog_id)
    if not deleted:
        raise HTTPException(status_code=404, detail="Blog not found")
    return deleted


# Users
@app.post("/login", response_model=schemas.Token)
def user_login(
    form_data: OAuth2PasswordRequestForm = Depends(), db: Session = Depends(get_db)
):
    user = crud.authenticate_user(db, form_data.username, form_data.password)
    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password",
            headers={"WWW-Authenticate": "Bearer"},
        )
    access_token = create_access_token(data={"sub": user.username})
    return {"access_token": access_token, "token_type": "bearer", "user_id": user.id}


@app.post("/register", response_model=schemas.UserOut)
def register_user(user: schemas.UserCreate, db: Session = Depends(get_db)):
    if crud.get_user_by_username(db, user.username):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Username already registered",
        )
    if crud.get_user_by_email(db, user.email):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Account with that email already registered",
        )
    # Default Cases
    return crud.create_user(db, user)