<?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;

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)
    {
        $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) {
            $query->where('status', $request->status);
        }

        $pickupCodes = $query->paginate(15)->withQueryString();
        
        // 供新增彈窗使用的機台清單
        $machines = Machine::all();

        return view('admin.sales.pickup-codes.index', [
            'title' => '取貨碼設定',
            'description' => '產生與管理商品取貨驗證碼',
            'pickupCodes' => $pickupCodes,
            'machines' => $machines,
        ]);
    }

    /**
     * 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
        ]);

        $machine = Machine::findOrFail($validated['machine_id']);
        $expiresAt = now()->addHours((int) ($request->expires_hours ?? 24));
        
        $pickupCode = PickupCode::create([
            'machine_id' => $validated['machine_id'],
            'slot_no' => $validated['slot_no'],
            'code' => PickupCode::generateUniqueCode($validated['machine_id']),
            'expires_at' => $expiresAt,
            'status' => 'active',
            'company_id' => $machine->company_id,
            'created_by' => Auth::id(),
        ]);

        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',
        ]);

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

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

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

        $passCodes = $query->paginate(15)->withQueryString();
        $machines = Machine::all();

        return view('admin.sales.pass-codes.index', [
            'title' => '通行碼設定',
            'description' => '特殊通行權限碼管理 (測試/補貨用)',
            'passCodes' => $passCodes,
            'machines' => $machines,
        ]);
    }

    /**
     * 產生通行碼
     */
    public function storePassCode(Request $request)
    {
        $validated = $request->validate([
            'machine_id' => 'required|exists:machines,id',
            'name' => 'nullable|string|max:50',
            'expires_days' => 'nullable|integer|min:1',
            'custom_code' => 'nullable|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(),
        ]);

        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' => 'required|in:active,disabled',
        ]);

        $passCode->update($validated);

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

    /**
     * 刪除通行碼
     */
    public function destroyPassCode(PassCode $passCode)
    {
        $passCode->delete();
        return back()->with('success', __('Pass code deleted.'));
    }

    // 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',
        ]);
    }
}