<?php

namespace App\Http\Controllers\Admin;

use App\Models\Machine\Machine;
use Illuminate\Http\Request;
use Illuminate\View\View;

class MachineController extends AdminController
{
    /**
     * 顯示所有機台列表
     */
    public function index(Request $request): View
    {
        $per_page = $request->input('per_page', 10);
        $query = Machine::query();

        // 搜尋：名稱或序號
        if ($search = $request->input('search')) {
            $query->where(function ($q) use ($search) {
                $q->where('name', 'like', "%{$search}%")
                  ->orWhere('serial_no', 'like', "%{$search}%");
            });
        }

        $machines = $query->when($request->status, function ($query, $status) {
                return $query->where('status', $status);
            })
            ->latest()
            ->paginate($per_page)
            ->withQueryString();

        return view('admin.machines.index', compact('machines'));
    }

    /**
     * 顯示特定機台的日誌與詳細資訊
     */
    public function show(int $id): View
    {
        $machine = Machine::with(['logs' => function ($query) {
            $query->latest()->limit(50);
        }])->findOrFail($id);

        return view('admin.machines.show', compact('machine'));
    }

    /**
     * 顯示所有機台日誌列表
     */
    public function logs(Request $request): View
    {
        $per_page = $request->input('per_page', 10);
        $logs = \App\Models\Machine\MachineLog::with('machine')
            ->when($request->level, function ($query, $level) {
                return $query->where('level', $level);
            })
            ->when($request->machine_id, function ($query, $machineId) {
                return $query->where('machine_id', $machineId);
            })
            ->latest()
            ->paginate($per_page)->withQueryString();

        $machines = Machine::select('id', 'name')->get();

        return view('admin.machines.logs', compact('logs', 'machines'));
    }


    /**
     * AJAX: 取得特定帳號的機台分配狀態
     */
    public function getAccountMachines(\App\Models\System\User $user)
    {
        $currentUser = auth()->user();

        // 安全檢查：只能操作自己公司的帳號（除非是系統管理員）
        if (!$currentUser->isSystemAdmin() && $user->company_id !== $currentUser->company_id) {
            return response()->json(['error' => 'Unauthorized'], 403);
        }

        // 取得該公司所有機台 (限定 company_id 以實作資料隔離)
        $machines = Machine::where('company_id', $user->company_id)
            ->get(['id', 'name', 'serial_no']);
            
        $assignedIds = $user->machines()->pluck('machines.id')->toArray();

        return response()->json([
            'user' => $user,
            'machines' => $machines,
            'assigned_ids' => $assignedIds
        ]);
    }

    /**
     * AJAX: 儲存特定帳號的機台分配
     */
    public function syncAccountMachines(Request $request, \App\Models\System\User $user)
    {
        $currentUser = auth()->user();

        // 安全檢查
        if (!$currentUser->isSystemAdmin() && $user->company_id !== $currentUser->company_id) {
            return response()->json(['error' => 'Unauthorized'], 403);
        }

        $request->validate([
            'machine_ids' => 'nullable|array',
            'machine_ids.*' => 'exists:machines,id'
        ]);

        // 加固驗證：確保所有機台 ID 都屬於該使用者的公司
        if ($request->has('machine_ids')) {
            $machineIds = array_unique($request->machine_ids);
            $validCount = Machine::where('company_id', $user->company_id)
                ->whereIn('id', $machineIds)
                ->count();
            
            if ($validCount !== count($machineIds)) {
                return response()->json(['error' => 'Invalid machine IDs provided.'], 422);
            }
        }

        $user->machines()->sync($request->machine_ids ?? []);

        return response()->json([
            'success' => true, 
            'message' => __('Permissions updated successfully.'),
            'assigned_machines' => $user->machines()->select('machines.id', 'machines.name', 'machines.serial_no')->get()
        ]);
    }

    /**
     * 機台使用率統計 (開發中)
     */
    public function utilization(Request $request): View
    {
        return view('admin.machines.index', ['machines' => Machine::paginate(1)]); // Placeholder
    }

    /**
     * 機台到期管理 (開發中)
     */
    public function expiry(Request $request): View
    {
        return view('admin.machines.index', ['machines' => Machine::paginate(1)]); // Placeholder
    }

    /**
     * 機台維護紀錄 (開發中)
     */
    public function maintenance(Request $request): View
    {
        return view('admin.machines.index', ['machines' => Machine::paginate(1)]); // Placeholder
    }
}