<?php

namespace App\Http\Controllers\Admin\BasicSettings;

use App\Http\Controllers\Admin\AdminController;
use App\Models\Machine\Machine;
use App\Models\Machine\MachineModel;
use App\Models\System\PaymentConfig;
use Illuminate\Http\Request;
use Illuminate\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;

use Illuminate\Support\Facades\Log;

class MachineSettingController extends AdminController
{
    /**
     * 顯示機台與型號設定列表 (採用標籤頁整合)
     */
    public function index(Request $request): View
    {
        $tab = $request->input('tab', 'machines');
        $per_page = $request->input('per_page', 20);
        $search = $request->input('search');

        // 1. 處理機台清單 (Machines Tab)
        $machineQuery = Machine::query()->with(['machineModel', 'paymentConfig', 'company']);
        if ($tab === 'machines' && $search) {
            $machineQuery->where(function ($q) use ($search) {
                $q->where('name', 'like', "%{$search}%")
                  ->orWhere('serial_no', 'like', "%{$search}%");
            });
        }
        $machines = $machineQuery->latest()->paginate($per_page, ['*'], 'machines_page')->withQueryString();

        // 2. 處理型號清單 (Models Tab)
        $modelQuery = MachineModel::query()->withCount('machines');
        if ($tab === 'models' && $search) {
            $modelQuery->where('name', 'like', "%{$search}%");
        }
        $models_list = $modelQuery->latest()->paginate($per_page, ['*'], 'models_page')->withQueryString();

        // 3. 基礎下拉資料 (用於新增/編輯機台的彈窗)
        $models = MachineModel::select('id', 'name')->get();
        $paymentConfigs = PaymentConfig::select('id', 'name')->get();
        $companies = \App\Models\System\Company::select('id', 'name')->get();

        return view('admin.basic-settings.machines.index', compact(
            'machines', 
            'models_list', 
            'models', 
            'paymentConfigs', 
            'companies',
            'tab'
        ));
    }

    /**
     * 儲存新機台 (僅核心欄位)
     */
    public function store(Request $request): RedirectResponse
    {
        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'serial_no' => 'required|string|unique:machines,serial_no',
            'company_id' => 'required|exists:companies,id',
            'machine_model_id' => 'required|exists:machine_models,id',
            'payment_config_id' => 'nullable|exists:payment_configs,id',
            'location' => 'nullable|string|max:255',
            'images.*' => 'image|mimes:jpeg,png,jpg,gif|max:2048',
        ]);

        $imagePaths = [];
        if ($request->hasFile('images')) {
            foreach (array_slice($request->file('images'), 0, 3) as $image) {
                $imagePaths[] = $this->processAndStoreImage($image);
            }
        }

        $machine = Machine::create(array_merge($validated, [
            'status' => 'offline',
            'creator_id' => auth()->id(),
            'updater_id' => auth()->id(),
            'card_reader_seconds' => 30, // 預設值
            'card_reader_checkout_time_1' => '22:30:00',
            'card_reader_checkout_time_2' => '23:45:00',
            'payment_buffer_seconds' => 5,
            'images' => $imagePaths,
        ]));

        return redirect()->route('admin.basic-settings.machines.index')
            ->with('success', __('Machine created successfully.'));
    }

    /**
     * 顯示詳細編輯頁面
     */
    public function edit(Machine $machine): View
    {
        $models = MachineModel::select('id', 'name')->get();
        $paymentConfigs = PaymentConfig::select('id', 'name')->get();
        $companies = \App\Models\System\Company::select('id', 'name')->get();

        return view('admin.basic-settings.machines.edit', compact('machine', 'models', 'paymentConfigs', 'companies'));
    }

    /**
     * 更新機台詳細參數
     */
    public function update(Request $request, Machine $machine): RedirectResponse
    {
        Log::info('Machine Update Request', ['machine_id' => $machine->id, 'data' => $request->all()]);

        try {
            $validated = $request->validate([
                'name' => 'required|string|max:255',
                'card_reader_seconds' => 'required|integer|min:0',
                'payment_buffer_seconds' => 'required|integer|min:0',
                'card_reader_checkout_time_1' => 'nullable|string',
                'card_reader_checkout_time_2' => 'nullable|string',
                'heating_start_time' => 'nullable|string',
                'heating_end_time' => 'nullable|string',
                'card_reader_no' => 'nullable|string|max:255',
                'key_no' => 'nullable|string|max:255',
                'invoice_status' => 'required|integer|in:0,1,2',
                'welcome_gift_enabled' => 'boolean',
                'is_spring_slot_1_10' => 'boolean',
                'is_spring_slot_11_20' => 'boolean',
                'is_spring_slot_21_30' => 'boolean',
                'is_spring_slot_31_40' => 'boolean',
                'is_spring_slot_41_50' => 'boolean',
                'is_spring_slot_51_60' => 'boolean',
                'member_system_enabled' => 'boolean',
                'machine_model_id' => 'required|exists:machine_models,id',
                'payment_config_id' => 'nullable|exists:payment_configs,id',
                'location' => 'nullable|string|max:255',
            ]);
            
            Log::info('Machine Update Validated Data', ['data' => $validated]);
        } catch (\Illuminate\Validation\ValidationException $e) {
            Log::error('Machine Update Validation Failed', ['errors' => $e->errors()]);
            throw $e;
        }

        $machine->update(array_merge($validated, [
            'updater_id' => auth()->id(),
        ]));

        // 處理圖片更新 (支援 3 個獨立槽位)
        if ($request->hasFile('images')) {
            $currentImages = $machine->images ?? [];
            $newImages = $request->file('images');
            $updated = false;

            foreach ($newImages as $index => $file) {
                // 限制 3 個槽位 (0, 1, 2)
                if ($index < 0 || $index > 2) continue;

                // 刪除該槽位的舊圖
                if (isset($currentImages[$index]) && !empty($currentImages[$index])) {
                    \Illuminate\Support\Facades\Storage::disk('public')->delete($currentImages[$index]);
                }

                // 處理並儲存新圖
                $currentImages[$index] = $this->processAndStoreImage($file);
                $updated = true;
            }

            if ($updated) {
                ksort($currentImages);
                $machine->update(['images' => array_values($currentImages)]);
            }
        }

        return redirect()->route('admin.basic-settings.machines.index')
            ->with('success', __('Machine settings updated successfully.'));
    }

    /**
     * 處理並儲存圖片 (轉換為 WebP 並調整大小)
     */
    protected function processAndStoreImage($file)
    {
        $path = 'machines/' . \Illuminate\Support\Str::random(40) . '.webp';
        
        // 載入原圖
        $imageInfo = getimagesize($file->getRealPath());
        $mime = $imageInfo['mime'];
        
        switch ($mime) {
            case 'image/jpeg':
                $image = imagecreatefromjpeg($file->getRealPath());
                break;
            case 'image/png':
                $image = imagecreatefrompng($file->getRealPath());
                break;
            case 'image/gif':
                $image = imagecreatefromgif($file->getRealPath());
                break;
            default:
                return $file->store('machines', 'public');
        }

        if ($image) {
            // [修正] imagewebp(): Palette image not supported by webp
            // 若為 Palette 圖片 (例如 GIF)，轉換為 Truecolor
            if (!imageistruecolor($image)) {
                imagepalettetotruecolor($image);
            }

            \Illuminate\Support\Facades\Storage::disk('public')->makeDirectory('machines');
            $fullPath = \Illuminate\Support\Facades\Storage::disk('public')->path($path);
            
            // 轉換並儲存 (品質 80)
            imagewebp($image, $fullPath, 80);
            imagedestroy($image);
            
            return $path;
        }

        return $file->store('machines', 'public');
    }
}