<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Models\Transaction\PickupCode;
use App\Models\Transaction\PassCode;
use App\Models\Machine\Machine;
use Carbon\Carbon;
use Illuminate\Support\Facades\Auth;

use App\Models\System\SystemOperationLog;

class SalesController extends Controller
{
    // 銷售&金流紀錄
    public function index()
    {
        return view('admin.placeholder', [
            'title' => '銷售&金流紀錄',
            'description' => '銷售交易與金流明細查詢',
            'features' => [
                '銷售記錄查詢',
                '金流對帳',
                '發票管理',
                '退款處理',
            ]
        ]);
    }

    // 取貨碼設定
    public function pickupCodes(Request $request)
    {
        $tab = $request->input('tab', 'list');
        $isAjax = $request->ajax();

        $data = [
            'title' => '取貨碼設定',
            'description' => '產生與管理商品取貨驗證碼',
            'tab' => $tab,
        ];

        // 1. 取貨碼列表 (list)
        if (!$isAjax || $tab === 'list') {
            $query = PickupCode::with(['machine.slots.product', 'creator'])->latest();

            if ($request->search) {
                $query->where(function ($q) use ($request) {
                    $q->where('code', 'like', "%{$request->search}%")
                        ->orWhereHas('machine', function ($mq) use ($request) {
                            $mq->where('name', 'like', "%{$request->search}%")
                                ->orWhere('serial_no', 'like', "%{$request->search}%");
                        });
                });
            }

            if ($request->status && trim($request->status) !== '') {
                $query->where('status', trim($request->status));
            }

            $per_page = $request->input('per_page', 15);
            $data['pickupCodes'] = $query->paginate($per_page, ['*'], 'list_page')->withQueryString();
            
            // 供新增彈窗使用的機台清單
            $data['machines'] = Machine::all();
        }

        // 2. 操作紀錄 (logs)
        if (!$isAjax || $tab === 'logs') {
            $logQuery = SystemOperationLog::with('user:id,name')
                ->where('module', 'pickup_code');

            if ($request->filled('search_log')) {
                $search = $request->input('search_log');
                $logQuery->where(function ($q) use ($search) {
                    $q->where('target_id', 'like', "%{$search}%")
                      ->orWhere('new_values', 'like', "%{$search}%")
                      ->orWhere('old_values', 'like', "%{$search}%");
                });
            }

            // 新增：類型篩選
            if ($request->filled('action')) {
                $logQuery->where('action', $request->action);
            }

            // 新增：日期區間篩選
            if ($request->filled('start_date') && $request->filled('end_date')) {
                try {
                    $start = \Carbon\Carbon::parse($request->start_date)->startOfMinute();
                    $end = \Carbon\Carbon::parse($request->end_date)->endOfMinute();
                    $logQuery->whereBetween('created_at', [$start, $end]);
                } catch (\Exception $e) { }
            }

            $data['logs'] = $logQuery->latest()
                ->paginate($request->input('per_page', 15), ['*'], 'log_page')
                ->withQueryString();

            // 定義可用動作
            $data['actions'] = [
                'create' => __('create'),
                'update' => __('update'),
                'cancel' => __('cancel'),
                'used' => __('used'),
                'consume' => __('consume'),
                'consume_failed' => __('consume_failed'),
                'verify_success' => __('verify_success'),
            ];
        }

        if ($isAjax) {
            return response()->json([
                'success' => true,
                'tab' => $tab,
                'html' => view('admin.sales.pickup-codes.partials.tab-' . $tab, $data)->render()
            ]);
        }

        return view('admin.sales.pickup-codes.index', $data);
    }

    /**
     * 產生取貨碼
     */
    public function storePickupCode(Request $request)
    {
        $validated = $request->validate([
            'machine_id' => 'required|exists:machines,id',
            'slot_no' => 'required|string',
            'expires_hours' => 'nullable|integer|min:1|max:720', // 最長一個月
            'custom_code' => 'nullable|string|min:4|max:12',
        ]);

        $machine = Machine::findOrFail($validated['machine_id']);
        $expiresAt = now()->addHours((int) ($request->expires_hours ?? 24));

        $pickupCode = PickupCode::create([
            'machine_id' => $validated['machine_id'],
            'slot_no' => $validated['slot_no'],
            'code' => $request->custom_code ?? PickupCode::generateUniqueCode($validated['machine_id']),
            'expires_at' => $expiresAt,
            'status' => 'active',
            'company_id' => $machine->company_id,
            'created_by' => Auth::id(),
        ]);

        SystemOperationLog::create([
            'company_id' => $machine->company_id,
            'user_id' => Auth::id(),
            'module' => 'pickup_code',
            'action' => 'create',
            'target_id' => $pickupCode->id,
            'target_type' => PickupCode::class,
            'new_values' => $pickupCode->toArray(),
        ]);

        return back()->with('success', __('Pickup code generated: :code', ['code' => $pickupCode->code]));
    }

    /**
     * 更新取貨碼 (僅限修改時間)
     */
    public function updatePickupCode(Request $request, PickupCode $pickupCode)
    {
        $validated = $request->validate([
            'expires_at' => 'required|date|after:now',
        ]);

        $oldValues = $pickupCode->toArray();

        $pickupCode->update([
            'expires_at' => $validated['expires_at'],
        ]);

        SystemOperationLog::create([
            'company_id' => $pickupCode->company_id,
            'user_id' => Auth::id(),
            'module' => 'pickup_code',
            'action' => 'update',
            'target_id' => $pickupCode->id,
            'target_type' => PickupCode::class,
            'old_values' => $oldValues,
            'new_values' => $pickupCode->toArray(),
        ]);

        return back()->with('success', __('Pickup code updated.'));
    }

    /**
     * 刪除/取消取貨碼
     */
    public function destroyPickupCode(PickupCode $pickupCode)
    {
        $oldValues = $pickupCode->toArray();
        $pickupCode->update(['status' => 'cancelled']);

        SystemOperationLog::create([
            'company_id' => $pickupCode->company_id,
            'user_id' => Auth::id(),
            'module' => 'pickup_code',
            'action' => 'cancel',
            'target_id' => $pickupCode->id,
            'target_type' => PickupCode::class,
            'old_values' => $oldValues,
            'new_values' => $pickupCode->toArray(),
        ]);

        return back()->with('success', __('Pickup code cancelled.'));
    }

    // 購買單
    public function orders()
    {
        return view('admin.placeholder', [
            'title' => '購買單',
            'description' => '購買訂單管理',
        ]);
    }

    // 促銷時段設定
    public function promotions()
    {
        return view('admin.placeholder', [
            'title' => '促銷時段設定',
            'description' => '促銷活動時間設定',
        ]);
    }

    // 通行碼設定
    public function passCodes(Request $request)
    {
        $tab = $request->input('tab', 'list');
        $isAjax = $request->ajax();

        $data = [
            'title' => '通行碼設定',
            'description' => '特殊通行權限碼管理 (測試/補貨用)',
            'tab' => $tab,
        ];

        // 1. 通行碼列表 (list)
        if (!$isAjax || $tab === 'list') {
            $query = PassCode::with(['machine', 'creator'])->latest();

            if ($request->search) {
                $query->where(function ($q) use ($request) {
                    $q->where('code', 'like', "%{$request->search}%")
                        ->orWhere('name', 'like', "%{$request->search}%")
                        ->orWhereHas('machine', function ($mq) use ($request) {
                            $mq->where('name', 'like', "%{$request->search}%")
                                ->orWhere('serial_no', 'like', "%{$request->search}%");
                        });
                });
            }

            if ($request->status && trim($request->status) !== '') {
                $status = trim($request->status);
                if ($status === 'active') {
                    $query->where('status', 'active')
                        ->where(function ($q) {
                            $q->whereNull('expires_at')
                                ->orWhere('expires_at', '>', now());
                        });
                } elseif ($status === 'expired') {
                    $query->where('status', 'active')
                        ->whereNotNull('expires_at')
                        ->where('expires_at', '<=', now());
                } else {
                    $query->where('status', $status);
                }
            }

            $data['passCodes'] = $query->paginate($request->input('per_page', 15), ['*'], 'list_page')->withQueryString();
            $data['machines'] = Machine::all();
        }

        // 2. 操作紀錄 (logs)
        if (!$isAjax || $tab === 'logs') {
            $logQuery = SystemOperationLog::with('user:id,name')
                ->where('module', 'pass_code');

            if ($request->filled('search_log')) {
                $search = $request->input('search_log');
                $logQuery->where(function ($q) use ($search) {
                    $q->where('target_id', 'like', "%{$search}%")
                      ->orWhere('new_values', 'like', "%{$search}%")
                      ->orWhere('old_values', 'like', "%{$search}%");
                });
            }

            // 新增：類型篩選
            if ($request->filled('action')) {
                $logQuery->where('action', $request->action);
            }

            // 新增：日期區間篩選
            if ($request->filled('start_date') && $request->filled('end_date')) {
                try {
                    $start = \Carbon\Carbon::parse($request->start_date)->startOfMinute();
                    $end = \Carbon\Carbon::parse($request->end_date)->endOfMinute();
                    $logQuery->whereBetween('created_at', [$start, $end]);
                } catch (\Exception $e) { }
            }

            $data['logs'] = $logQuery->latest()
                ->paginate($request->input('per_page', 15), ['*'], 'log_page')
                ->withQueryString();

            // 定義可用動作
            $data['actions'] = [
                'create' => __('create'),
                'update' => __('update'),
                'cancel' => __('cancel'),
                'used' => __('used'),
                'consume' => __('consume'),
                'verify_success' => __('verify_success'),
            ];
        }

        if ($isAjax) {
            return response()->json([
                'success' => true,
                'tab' => $tab,
                'html' => view('admin.sales.pass-codes.partials.tab-' . $tab, $data)->render()
            ]);
        }

        return view('admin.sales.pass-codes.index', $data);
    }

    /**
     * 產生通行碼
     */
    public function storePassCode(Request $request)
    {
        $validated = $request->validate([
            'machine_id' => 'required|exists:machines,id',
            'name' => 'required|string|max:50',
            'expires_days' => 'nullable|integer|min:0',
            'custom_code' => 'required|string|min:4|max:12',
        ]);

        $machine = Machine::findOrFail($validated['machine_id']);
        $expiresAt = $request->expires_days ? now()->addDays((int) $request->expires_days) : null;

        $passCode = PassCode::create([
            'machine_id' => $validated['machine_id'],
            'name' => $validated['name'] ?? 'Manual Generate',
            'code' => $validated['custom_code'] ?? PassCode::generateUniqueCode($validated['machine_id']),
            'expires_at' => $expiresAt,
            'status' => 'active',
            'company_id' => $machine->company_id,
            'created_by' => Auth::id(),
        ]);

        SystemOperationLog::create([
            'company_id' => $machine->company_id,
            'user_id' => Auth::id(),
            'module' => 'pass_code',
            'action' => 'create',
            'target_id' => $passCode->id,
            'target_type' => PassCode::class,
            'new_values' => $passCode->toArray(),
        ]);

        return back()->with('success', __('Pass code created: :code', ['code' => $passCode->code]));
    }

    /**
     * 更新通行碼
     */
    public function updatePassCode(Request $request, PassCode $passCode)
    {
        $validated = $request->validate([
            'name' => 'nullable|string|max:50',
            'expires_at' => 'nullable|date',
            'status' => 'nullable|in:active,disabled',
        ]);

        // 確保 expires_at 為空字串時轉為 null
        if (isset($validated['expires_at']) && empty($validated['expires_at'])) {
            $validated['expires_at'] = null;
        }

        $oldValues = $passCode->toArray();

        $passCode->update(array_filter($validated, function ($value, $key) use ($request) {
            return $request->has($key);
        }, ARRAY_FILTER_USE_BOTH));

        SystemOperationLog::create([
            'company_id' => $passCode->company_id,
            'user_id' => Auth::id(),
            'module' => 'pass_code',
            'action' => 'update',
            'target_id' => $passCode->id,
            'target_type' => PassCode::class,
            'old_values' => $oldValues,
            'new_values' => $passCode->toArray(),
        ]);

        return back()->with('success', __('Pass code updated.'));
    }

    /**
     * 刪除通行碼 (改為停用)
     */
    public function destroyPassCode(PassCode $passCode)
    {
        $oldValues = $passCode->toArray();
        $passCode->update(['status' => 'disabled']);

        SystemOperationLog::create([
            'company_id' => $passCode->company_id,
            'user_id' => Auth::id(),
            'module' => 'pass_code',
            'action' => 'cancel',
            'target_id' => $passCode->id,
            'target_type' => PassCode::class,
            'old_values' => $oldValues,
            'new_values' => $passCode->toArray(),
        ]);

        return back()->with('success', __('Pass code cancelled.'));
    }

    // 來店禮設定
    public function storeGifts()
    {
        return view('admin.placeholder', [
            'title' => '來店禮設定',
            'description' => '來店優惠活動設定',
        ]);
    }
}