<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Types;
use Illuminate\Support\Facades\Artisan;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Str;
use Illuminate\Support\Facades\File;

class ModuleGeneratorController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth');
    }

    public function index()
    {
        $contents = \App\Contents::where("kid","main")->orderBy("s","ASC")->get();
        return view('admin.module-generator', compact('contents'));
    }

    public function generate(Request $request)
    {
        $request->validate([
            'title' => 'required|string|max:255',
            'columns' => 'required|array',
        ]);

        $title = $request->title;
        $slug = Str::slug($title);
        $tableName = str_replace('-', '_', $slug);
        $modelName = Str::studly($slug);

        // 1. Create Migration File
        $timestamp = date('Y_m_d_His');
        $migrationFilename = "{$timestamp}_create_{$tableName}_table.php";
        $migrationPath = database_path("migrations/{$migrationFilename}");

        $migrationContent = "<?php\n\nuse Illuminate\Database\Migrations\Migration;\nuse Illuminate\Database\Schema\Blueprint;\nuse Illuminate\Support\Facades\Schema;\n\nclass Create" . Str::studly($tableName) . "Table extends Migration\n{\n    public function up()\n    {\n        Schema::create('{$tableName}', function (Blueprint \$table) {\n            \$table->id();\n";
        
        foreach ($request->columns as $column) {
            $uiType = $column['type'];
            if ($uiType === 'separator') continue; // No column for separator

            $colName = Str::snake($column['name']);
            
            $dbType = 'string';
            switch ($uiType) {
                case 'integer': $dbType = 'integer'; break;
                case 'decimal': $dbType = 'decimal'; break;
                case 'date': $dbType = 'date'; break;
                case 'datetime': $dbType = 'dateTime'; break;
                case 'time': $dbType = 'time'; break;
                case 'long-text': $dbType = 'longText'; break;
                case 'boolean': $dbType = 'boolean'; break;
                case 'multiple-choice': $dbType = 'text'; break; // Use text for multiple selection
                default: $dbType = 'string'; break;
            }

            if ($dbType == 'decimal') {
                $migrationContent .= "            \$table->decimal('{$colName}', 15, 2)->nullable();\n";
            } else {
                $migrationContent .= "            \$table->{$dbType}('{$colName}')->nullable();\n";
            }
        }
        
        $migrationContent .= "            \$table->timestamps();\n            \$table->softDeletes();\n        });\n    }\n\n    public function down()\n    {\n        Schema::dropIfExists('{$tableName}');\n    }\n}\n";
        
        File::put($migrationPath, $migrationContent);

        // Run the specific migration
        Artisan::call('migrate', [
            '--path' => "database/migrations/{$migrationFilename}",
            '--force' => true
        ]);

        // 2. Create Model
        $modelPath = app_path("Models/{$modelName}.php");
        if (!File::exists($modelPath)) {
            $modelContent = "<?php\n\nnamespace App\Models;\n\nuse Illuminate\Database\Eloquent\Model;\nuse Illuminate\Database\Eloquent\SoftDeletes;\n\nclass {$modelName} extends Model\n{\n    use SoftDeletes;\n    protected \$table = '{$tableName}';\n    protected \$guarded = [];\n}\n";
            File::put($modelPath, $modelContent);
        }

        // 3. Create Blade View
        $viewPath = resource_path("views/admin/type/{$slug}.blade.php");
        if (!File::exists($viewPath)) {
            $templatePath = resource_path("views/admin/type/datagrid-module-template.blade.php");
            if (File::exists($templatePath)) {
                $templateContent = File::get($templatePath);

                // Placeholder replacements
                $templateContent = str_replace('[[MODEL_NAME]]', $modelName, $templateContent);
                $templateContent = str_replace('[[TITLE]]', $title, $templateContent);
                $templateContent = str_replace('[[TABLE_NAME]]', $tableName, $templateContent);

                // Generate relationDatas
                $relationDatasCode = "[\n";
                foreach ($request->columns as $column) {
                    $uiType = $column['type'];
                    if ($uiType === 'separator') {
                        $label = $column['label'] ?? 'Separator';
                        $relationDatasCode .= "    'separator_" . rand(100, 999) . "' => [\n        'type' => 'separator',\n        'label' => '{$label}',\n    ],\n";
                        continue;
                    }

                    $colName = Str::snake($column['name']);
                    $relationDatasCode .= "    '{$colName}' => [\n        'type' => '{$uiType}',\n";
                    
                    if ($uiType === 'select' || $uiType === 'multiple-choice') {
                        $optionsStr = $column['options'] ?? '';
                        $optionsArr = array_map('trim', explode(',', $optionsStr));
                        $relationDatasCode .= "        'datas' => [\n";
                        foreach ($optionsArr as $opt) {
                            if (empty($opt)) continue;
                            $relationDatasCode .= "            ['id' => '{$opt}', 'name' => '{$opt}'],\n";
                        }
                        $relationDatasCode .= "        ],\n";
                        if ($uiType === 'select') {
                            $relationDatasCode .= "        'value' => 'id',\n";
                        }
                        if ($uiType === 'multiple-choice') {
                            $relationDatasCode .= "        'pattern' => '{name}',\n";
                            $relationDatasCode .= "        'seperator' => ',',\n";
                        }
                    } elseif ($uiType === 'select-dropdown') {
                        $source = $column['source'] ?? '';
                        $relationDatasCode .= "        'dataSource' => '{$source}',\n";
                        $relationDatasCode .= "        'datas' => [],\n";
                        $relationDatasCode .= "        'pattern' => '{name}',\n";
                    }

                    $relationDatasCode .= "    ],\n";
                }
                $relationDatasCode .= "]";

                $templateContent = str_replace('[[RELATION_DATAS]]', $relationDatasCode, $templateContent);

                File::put($viewPath, $templateContent);
            }
        }

        // 4. Handle Icon
        $iconName = $slug;
        if ($request->hasFile('icon')) {
            $request->file('icon')->move(base_path('assets/icons'), $iconName . '.png');
        }

        // 5. Insert into types table
        $type = Types::where('slug', $slug)->first();
        if (!$type) {
            $type = new Types();
            $type->title = $title;
            $type->slug = $slug;
            $type->icon = $iconName;
            $type->enabled = 1;
            $type->full_control = "1";
            $type->write = "1";
            $type->read = "1";
            $type->modify = "1";
            $type->save();
        }

        return redirect("admin/types/{$slug}")->with('success', 'Module generated successfully!');
    }
}