"""请假申请 API — 工作流测试"""
from __future__ import annotations

import logging
from typing import Optional

from fastapi import APIRouter, Depends, Query
from sqlalchemy.orm import Session

from app.core.menu_guard import require_admin_or_super_admin
from app.core.database import get_db
from app.core.response import success_response, error_response
from app.crud import leave as leave_crud
from app.crud.leave import total_pages
from app.schemas.leave import LeaveCreate, LeaveUpdate

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/web/admin/leave", tags=["请假管理"])

_LEAVE_TYPE_MAP = {"personal": "事假", "sick": "病假", "annual": "年假", "other": "其他"}


def _leave_local_callback(db: Session, business_id: str, event: str) -> None:
    if not business_id:
        return
    if event == "completed":
        leave_crud.update_leave_status(db, business_id, "approved")
    elif event == "rejected":
        leave_crud.update_leave_status(db, business_id, "rejected")
    db.commit()


from app.services.workflow_callback import register_local_callback
register_local_callback("/api/admin/leave/callback", _leave_local_callback)


@router.get("")
def list_leaves(
    page: int = Query(1, ge=1),
    pageSize: int = Query(10, ge=1, le=100),
    keyword: Optional[str] = Query(None),
    status: Optional[str] = Query(None),
    _user: dict = Depends(require_admin_or_super_admin),
    db: Session = Depends(get_db),
):
    tenant_no = _user.get("tenant_no", "")
    user_id = _user.get("user_id") or _user.get("id", "")
    items, total = leave_crud.list_leaves(
        db, page=page, page_size=pageSize, keyword=keyword, status=status,
        tenant_no=tenant_no, create_by=user_id, user_info=_user,
    )
    for item in items:
        item["leaveTypeLabel"] = _LEAVE_TYPE_MAP.get(item.get("leaveType", ""), item.get("leaveType", ""))
    return success_response({
        "list": items, "total": total, "page": page, "pageSize": pageSize,
        "totalPages": total_pages(total, pageSize),
    })


@router.post("")
def create_leave(
    body: LeaveCreate,
    _user: dict = Depends(require_admin_or_super_admin),
    db: Session = Depends(get_db),
):
    tenant_no = _user.get("tenant_no", "")
    user_id = _user.get("user_id") or _user.get("id", "")
    dept_id = _user.get("region_id", "")
    row = leave_crud.create_leave(
        db,
        leave_type=body.leaveType,
        start_date=body.startDate,
        end_date=body.endDate,
        days=body.days,
        reason=body.reason or "",
        tenant_no=tenant_no,
        user_id=user_id,
        dept_id=dept_id,
        remark=body.remark or "",
    )
    db.commit()
    return success_response(leave_crud._row_to_dict(row))


@router.post("/{leave_id}/submit")
def submit_leave(
    leave_id: str,
    _user: dict = Depends(require_admin_or_super_admin),
    db: Session = Depends(get_db),
):
    from app.models.models import WfProcessDef
    from app.services.workflow_engine import WorkflowEngine

    tenant_no = _user.get("tenant_no", "")
    user_id = _user.get("user_id") or _user.get("id", "")

    leave = leave_crud.get_leave(db, leave_id)
    if not leave:
        return error_response(404, "请假记录不存在")

    if leave["status"] not in ("draft", "rejected"):
        return error_response(400, "只有草稿或已驳回的请假单可以提交")

    defn = db.query(WfProcessDef).filter(
        WfProcessDef.process_code == "leave_request",
        WfProcessDef.del_flag == 0,
        WfProcessDef.status == "1",
    ).first()
    if not defn:
        return error_response(400, "未找到请假审批流程(leave_request)，请先在流程配置中创建并发布")

    variables = {
        "days": leave["days"],
        "leave_days": leave["days"],
        "leaveType": leave["leaveType"],
        "applicant": user_id,
    }

    try:
        engine = WorkflowEngine(db)
        instance = engine.start_process(
            process_def_id=defn.id,
            business_type="leave",
            business_id=leave_id,
            starter_user_id=user_id,
            variables=variables,
            callback_url="/api/admin/leave/callback",
            tenant_no=tenant_no,
            user_id=user_id,
        )
        leave_crud.update_leave_status(db, leave_id, "pending", wf_instance_id=instance.id, user_id=user_id)
        db.commit()
        return success_response({"instanceId": instance.id, "status": "pending"})
    except Exception as e:
        db.rollback()
        logger.exception("发起请假审批失败: %s", e)
        return error_response(500, f"发起审批失败: {e}")


@router.post("/callback")
def leave_workflow_callback(
    body: dict,
    db: Session = Depends(get_db),
):
    logger.info("请假工作流回调: %s", body)
    business_id = body.get("businessId", "")
    event = body.get("event", "")
    if not business_id:
        return success_response({"received": True})

    if event == "completed":
        leave_crud.update_leave_status(db, business_id, "approved")
    elif event == "rejected":
        leave_crud.update_leave_status(db, business_id, "rejected")
    db.commit()
    return success_response({"received": True})


@router.get("/{leave_id}")
def get_leave(
    leave_id: str,
    _user: dict = Depends(require_admin_or_super_admin),
    db: Session = Depends(get_db),
):
    item = leave_crud.get_leave(db, leave_id)
    if not item:
        return error_response(404, "请假记录不存在")
    item["leaveTypeLabel"] = _LEAVE_TYPE_MAP.get(item.get("leaveType", ""), item.get("leaveType", ""))
    return success_response(item)


@router.delete("/{leave_id}")
def delete_leave(
    leave_id: str,
    _user: dict = Depends(require_admin_or_super_admin),
    db: Session = Depends(get_db),
):
    user_id = _user.get("user_id") or _user.get("id", "")
    leave = leave_crud.get_leave(db, leave_id)
    if not leave:
        return error_response(404, "请假记录不存在")
    if leave["status"] == "pending":
        return error_response(400, "审批中的请假单不能删除")
    leave_crud.soft_delete_leave(db, leave_id, user_id=user_id, user_info=_user)
    db.commit()
    return success_response(None)


@router.put("/{leave_id}")
def update_leave(
    leave_id: str,
    body: LeaveUpdate,
    _user: dict = Depends(require_admin_or_super_admin),
    db: Session = Depends(get_db),
):
    user_id = _user.get("user_id") or _user.get("id", "")
    leave = leave_crud.get_leave(db, leave_id)
    if not leave:
        return error_response(404, "请假记录不存在")
    if leave["status"] not in ("draft", "rejected"):
        return error_response(400, "只有草稿或已驳回状态可以编辑")
    leave_crud.update_leave(db, leave_id, user_id=user_id, **body.model_dump(exclude_none=True))
    db.commit()
    return success_response(leave_crud.get_leave(db, leave_id))