"""
===============================================================================
FILE: modules/web_api/routers/tasks.py
PROJECT: SCUD Orion AI (Unified Architecture)
MODULE: web_api / routers
ROLE: REST API эндпоинты реестра задач (получение, создание и обновление).
===============================================================================
"""

from fastapi import APIRouter, Depends, HTTPException, Request
from pydantic import BaseModel
from typing import Optional, Dict, Any

from routers.auth import get_current_user
from llm.db_tools import db_get_tasks, db_add_task, db_update_task_details

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

class TaskCreateRequest(BaseModel):
    title: str
    priority: Optional[str] = "MEDIUM"
    module: Optional[str] = "general"
    due_date: Optional[str] = None
    status: Optional[str] = "BACKLOG"

class TaskUpdateRequest(BaseModel):
    title: Optional[str] = None
    priority: Optional[str] = None
    due_date: Optional[str] = None
    status: Optional[str] = None


def resolve_user_id(current_user: Dict[str, Any]) -> int:
    """Извлекает корректный ID пользователя из JWT payload или ставит дефолтный 1."""
    if not current_user:
        return 1
    return current_user.get("id") or current_user.get("user_id") or 1


@router.get("")
async def get_tasks_endpoint(status: Optional[str] = None, current_user = Depends(get_current_user)):
    user_id = resolve_user_id(current_user)
    return {"tasks": db_get_tasks(user_id=user_id, status=status)}


@router.post("")
async def create_task_endpoint(req: TaskCreateRequest, current_user = Depends(get_current_user)):
    user_id = resolve_user_id(current_user)
    res = db_add_task(
        user_id=user_id,
        module=req.module,
        title=req.title,
        priority=req.priority,
        due_date=req.due_date,
        status=req.status
    )
    if "error" in res:
        raise HTTPException(status_code=400, detail=res["error"])
    return res


@router.patch("/{task_id}")
async def update_task_endpoint(task_id: str, req: TaskUpdateRequest, current_user = Depends(get_current_user)):
    user_id = resolve_user_id(current_user)
    res = db_update_task_details(
        user_id=user_id,
        task_id=task_id,
        title=req.title,
        priority=req.priority,
        status=req.status,
        due_date=req.due_date
    )
    if "error" in res:
        raise HTTPException(status_code=404, detail=res["error"])
    return res