from typing import List, Optional
from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.orm import Session
from app.db.session import get_db
from app.crud import task_crud
from app.schemas.task import TaskCreate, TaskUpdate, TaskResponse

router = APIRouter()


@router.post("/tasks", response_model=TaskResponse, status_code=201)
def create_task(task: TaskCreate, db: Session = Depends(get_db)):
    return task_crud.create_task(db=db, task=task)


@router.get("/tasks", response_model=List[TaskResponse])
def get_tasks(
    skip: int = Query(0, ge=0),
    limit: int = Query(100, ge=1, le=1000),
    completed: Optional[bool] = Query(None),
    db: Session = Depends(get_db),
):
    return task_crud.get_tasks(db=db, skip=skip, limit=limit, completed=completed)


@router.get("/tasks/{task_id}", response_model=TaskResponse)
def get_task(task_id: int, db: Session = Depends(get_db)):
    db_task = task_crud.get_task(db=db, task_id=task_id)
    if not db_task:
        raise HTTPException(status_code=404, detail="Task not found")
    return db_task


@router.put("/tasks/{task_id}", response_model=TaskResponse)
def update_task(task_id: int, task_update: TaskUpdate, db: Session = Depends(get_db)):
    db_task = task_crud.update_task(db=db, task_id=task_id, task_update=task_update)
    if not db_task:
        raise HTTPException(status_code=404, detail="Task not found")
    return db_task


@router.delete("/tasks/{task_id}", status_code=204)
def delete_task(task_id: int, db: Session = Depends(get_db)):
    success = task_crud.delete_task(db=db, task_id=task_id)
    if not success:
        raise HTTPException(status_code=404, detail="Task not found")


@router.get("/tasks/priority/{priority}", response_model=List[TaskResponse])
def get_tasks_by_priority(priority: str, db: Session = Depends(get_db)):
    return task_crud.get_tasks_by_priority(db=db, priority=priority)