"""
文件锁 API 路由
接入 FileLockService 服务，管理文件的排他锁
"""
from fastapi import APIRouter
from pydantic import BaseModel
from typing import Optional
from dataclasses import asdict

from ..services.file_lock import get_file_lock_service

router = APIRouter()


class LockAcquireRequest(BaseModel):
    file_path: str
    agent_id: str
    agent_name: Optional[str] = ""


class LockReleaseRequest(BaseModel):
    file_path: str
    agent_id: str


@router.get("")
@router.get("/")
async def list_locks():
    """获取所有文件锁列表"""
    service = get_file_lock_service()
    locks = await service.get_locks()
    return {
        "locks": [
            {
                "file_path": lock.file_path,
                "agent_id": lock.agent_id,
                "agent_name": lock.agent_name,
                "acquired_at": lock.acquired_at,
                "elapsed_display": lock.elapsed_display
            }
            for lock in locks
        ]
    }


@router.post("/acquire")
async def acquire_lock(request: LockAcquireRequest):
    """获取文件锁"""
    service = get_file_lock_service()
    success = await service.acquire_lock(
        file_path=request.file_path,
        agent_id=request.agent_id,
        agent_name=request.agent_name or ""
    )
    if success:
        return {"success": True, "message": "Lock acquired"}
    return {"success": False, "message": "File already locked by another agent"}


@router.post("/release")
async def release_lock(request: LockReleaseRequest):
    """释放文件锁"""
    service = get_file_lock_service()
    success = await service.release_lock(
        file_path=request.file_path,
        agent_id=request.agent_id
    )
    if success:
        return {"success": True, "message": "Lock released"}
    return {"success": False, "message": "Lock not found or not owned by this agent"}


@router.get("/check")
async def check_lock(file_path: str):
    """检查文件锁定状态"""
    service = get_file_lock_service()
    locked_by = await service.check_locked(file_path)
    return {
        "file_path": file_path,
        "locked": locked_by is not None,
        "locked_by": locked_by
    }