<?php

/**
 * 文件功能：后台任命管理控制器
 * 管理员可以在此查看所有在职人员、进行新增任命和撤销职务
 * 任命/撤销通过 AppointmentService 执行，权限日志自动记录
 *
 * @author   ChatRoom Laravel
 *
 * @version  1.0.0
 */

namespace App\Http\Controllers\Admin;

use App\Events\AppointmentAnnounced;
use App\Http\Controllers\Controller;
use App\Models\Department;
use App\Models\Position;
use App\Models\User;
use App\Models\UserPosition;
use App\Services\AppointmentService;
use App\Services\ChatStateService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\View\View;

class AppointmentController extends Controller
{
    /**
     * 注入任命服务
     */
    public function __construct(
        private readonly AppointmentService $appointmentService,
        private readonly ChatStateService $chatState,
    ) {}

    /**
     * 任命管理主列表（当前全部在职人员）
     */
    public function index(): View
    {
        // 所有在职记录（按部门 rank 倒序、职务 rank 倒序）
        $activePositions = UserPosition::query()
            ->where('is_active', true)
            ->with([
                'user',
                'position.department',
                'appointedBy',
            ])
            ->join('positions', 'user_positions.position_id', '=', 'positions.id')
            ->join('departments', 'positions.department_id', '=', 'departments.id')
            ->orderByDesc('departments.rank')
            ->orderByDesc('positions.rank')
            ->select('user_positions.*')
            ->get();

        // 部门+职务（供新增任命弹窗下拉选择，带在职人数统计）
        $departments = Department::with([
            'positions' => fn ($q) => $q->withCount('activeUserPositions')->ordered(),
        ])->ordered()->get();

        return view('admin.appointments.index', compact('activePositions', 'departments'));
    }

    /**
     * 执行新增任命
     * 管理员在后台直接任命用户，操作人为当前登录管理员
     */
    public function store(Request $request): RedirectResponse
    {
        $request->validate([
            'username' => 'required|string|exists:users,username',
            'position_id' => 'required|exists:positions,id',
            'remark' => 'nullable|string|max:255',
        ]);

        $operator = Auth::user();
        $target = User::where('username', $request->username)->firstOrFail();
        $targetPosition = Position::with('department')->findOrFail($request->position_id);

        $result = $this->appointmentService->appoint($operator, $target, $targetPosition, $request->remark);

        if ($result['ok']) {
            // 向所有当前有人在线的聊天室广播礼花公告（后台操作人不在聊天室内）
            foreach ($this->chatState->getAllActiveRoomIds() as $roomId) {
                broadcast(new AppointmentAnnounced(
                    roomId: $roomId,
                    targetUsername: $target->username,
                    positionIcon: $targetPosition->icon ?? '🎖️',
                    positionName: $targetPosition->name,
                    departmentName: $targetPosition->department?->name ?? '',
                    operatorName: $operator->username,
                ));
            }

            return redirect()->route('admin.appointments.index')->with('success', $result['message']);
        }

        return redirect()->route('admin.appointments.index')->with('error', $result['message']);
    }

    /**
     * 撤销职务
     */
    public function revoke(Request $request, UserPosition $userPosition): RedirectResponse
    {
        $operator = Auth::user();
        $target = $userPosition->user;

        // 撤销前先记录职务信息（撤销后关联就断了）
        $userPosition->load('position.department');
        $posIcon = $userPosition->position?->icon ?? '🎖️';
        $posName = $userPosition->position?->name ?? '';
        $deptName = $userPosition->position?->department?->name ?? '';

        $result = $this->appointmentService->revoke($operator, $target, $request->remark);

        if ($result['ok']) {
            // 向所有活跃房间广播撤销公告
            if ($posName) {
                foreach ($this->chatState->getAllActiveRoomIds() as $roomId) {
                    broadcast(new AppointmentAnnounced(
                        roomId: $roomId,
                        targetUsername: $target->username,
                        positionIcon: $posIcon,
                        positionName: $posName,
                        departmentName: $deptName,
                        operatorName: $operator->username,
                        type: 'revoke',
                    ));
                }
            }

            return redirect()->route('admin.appointments.index')->with('success', $result['message']);
        }

        return redirect()->route('admin.appointments.index')->with('error', $result['message']);
    }

    /**
     * 查看某任职记录的在职登录日志
     */
    public function dutyLogs(UserPosition $userPosition): View
    {
        $userPosition->load(['user', 'position.department', 'appointedBy']);

        $logs = $userPosition->dutyLogs()
            ->orderByDesc('login_at')
            ->paginate(30);

        return view('admin.appointments.duty-logs', compact('userPosition', 'logs'));
    }

    /**
     * 查看某任职记录的权限操作日志
     */
    public function authorityLogs(UserPosition $userPosition): View
    {
        $userPosition->load(['user', 'position.department']);

        $logs = $userPosition->authorityLogs()
            ->with(['targetUser', 'targetPosition'])
            ->orderByDesc('created_at')
            ->paginate(30);

        return view('admin.appointments.authority-logs', compact('userPosition', 'logs'));
    }

    /**
     * 历史任职记录（全部 is_active=false 的记录）
     */
    public function history(): View
    {
        $history = UserPosition::query()
            ->where('is_active', false)
            ->with(['user', 'position.department', 'appointedBy', 'revokedBy'])
            ->orderByDesc('revoked_at')
            ->paginate(30);

        return view('admin.appointments.history', compact('history'));
    }

    /**
     * 搜索用户（供任命弹窗 Ajax 快速查找）
     */
    public function searchUsers(Request $request): JsonResponse
    {
        $keyword = $request->input('q', '');

        $users = User::query()
            ->where('id', '!=', 1)                    // 排除超级管理员
            ->where('username', 'like', "%{$keyword}%")
            ->whereDoesntHave('activePosition')        // 排除已有职务的用户
            ->select('id', 'username', 'user_level')
            ->limit(10)
            ->get();

        return response()->json($users);
    }
}