"""
===============================================================================
FILE: modules/web_api/routers/tasks.py
ROLE: REST API управления задачами (GET / POST / PATCH / DELETE).
===============================================================================
"""

# ANCHOR[TASKS_ROUTER_IMPORTS]
from typing import Dict, Any, Optional
from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel

from .auth import get_current_user
from llm.db_tools import (
    db_get_tasks,
    db_add_task,
    db_update_task_status,
    db_delete_task
)

router = APIRouter(prefix="/api/v1/tasks", tags=["tasks"])

# ANCHOR[TASKS_SCHEMAS]
class CreateTaskRequest(BaseModel):
    title: str
    priority: Optional[str] = "MEDIUM"
    module: Optional[str] = "general"
    due_date: Optional[str] = None

class UpdateTaskRequest(BaseModel):
    status: Optional[str] = "COMPLETED"
    due_date: Optional[str] = None

# ANCHOR[TASKS_ENDPOINTS]
@router.get("")
def get_tasks(user: Dict[str, Any] = Depends(get_current_user)):
    """Получить список всех задач текущего авторизованного пользователя."""
    return db_get_tasks(user_id=user["id"])

@router.post("")
def create_task_endpoint(req: CreateTaskRequest, user: Dict[str, Any] = Depends(get_current_user)):
    """Прямое создание задачи."""
    res = db_add_task(
        user_id=user["id"],
        module=req.module or "general",
        title=req.title.strip(),
        priority=req.priority or "MEDIUM",
        due_date=req.due_date
    )
    return res

@router.patch("/{task_id}")
def update_task_endpoint(task_id: str, req: UpdateTaskRequest, user: Dict[str, Any] = Depends(get_current_user)):
    """Прямое обновление статуса и срока задачи."""
    res = db_update_task_status(
        user_id=user["id"],
        task_id=task_id,
        status=req.status or "COMPLETED",
        due_date=req.due_date
    )
    if "error" in res:
        raise HTTPException(status_code=404, detail=res["error"])
    return res

@router.delete("/{task_id}")
def delete_task_endpoint(task_id: str, user: Dict[str, Any] = Depends(get_current_user)):
    """Прямое удаление задачи."""
    res = db_delete_task(user_id=user["id"], task_id=task_id)
    if "error" in res:
        raise HTTPException(status_code=404, detail=res["error"])
    return res