from typing import List
from fastapi import FastAPI, Depends, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from sqlalchemy.orm import Session

from app.db.session import get_db, engine
from app.db.base import Base
from app import crud, schemas

Base.metadata.create_all(bind=engine)

app = FastAPI(
    title="Todo App API",
    description="A simple Todo application API",
    version="1.0.0",
    openapi_url="/openapi.json",
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.get("/")
def read_root():
    return {"title": "Todo App API", "documentation": "/docs", "health": "/health"}


@app.get("/health")
def health_check():
    return {"status": "healthy", "service": "Todo App API"}


@app.get("/todos/", response_model=List[schemas.Todo])
def read_todos(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
    todos = crud.get_todos(db, skip=skip, limit=limit)
    return todos


@app.post("/todos/", response_model=schemas.Todo)
def create_todo(todo: schemas.TodoCreate, db: Session = Depends(get_db)):
    return crud.create_todo(db=db, todo=todo)


@app.get("/todos/{todo_id}", response_model=schemas.Todo)
def read_todo(todo_id: int, db: Session = Depends(get_db)):
    db_todo = crud.get_todo(db, todo_id=todo_id)
    if db_todo is None:
        raise HTTPException(status_code=404, detail="Todo not found")
    return db_todo


@app.put("/todos/{todo_id}", response_model=schemas.Todo)
def update_todo(todo_id: int, todo: schemas.TodoUpdate, db: Session = Depends(get_db)):
    db_todo = crud.update_todo(db, todo_id=todo_id, todo_update=todo)
    if db_todo is None:
        raise HTTPException(status_code=404, detail="Todo not found")
    return db_todo


@app.delete("/todos/{todo_id}")
def delete_todo(todo_id: int, db: Session = Depends(get_db)):
    if not crud.delete_todo(db, todo_id=todo_id):
        raise HTTPException(status_code=404, detail="Todo not found")
    return {"message": "Todo deleted successfully"}