<?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()
    {
        return view('admin.module-generator');
    }

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

        $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) {
            $colName = Str::snake($column['name']);
            $uiType = $column['type'];
            
            $dbType = 'string';
            switch ($uiType) {
                case 'integer': $dbType = 'integer'; break;
                case 'decimal': $dbType = 'decimal'; break;
                case 'date': $dbType = 'date'; break;
                case 'datetime': $dbType = 'dateTime'; break;
                case 'long-text': $dbType = 'longText'; break;
                case 'boolean': $dbType = 'boolean'; break;
                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);

                // Simple replacements in template
                $templateContent = str_replace('use App\Models\RadiographicTest;', "use App\Models\\{$modelName};", $templateContent);
                $templateContent = str_replace('$title = "Radiographic Test";', "\$title = \"{$title}\";", $templateContent);
                $templateContent = str_replace('$tableName = "radiographic_tests";', "\$tableName = \"{$tableName}\";", $templateContent);

                // Generate relationDatas
                $relationDatasCode = "\$relationDatas = [\n";
                foreach ($request->columns as $column) {
                    $colName = Str::snake($column['name']);
                    $colType = $column['type'];
                    $relationDatasCode .= "    '{$colName}' => [\n        'type' => '{$colType}',\n    ],\n";
                }
                $relationDatasCode .= "];";

                // Replace the hardcoded relationDatas in template
                $pattern = '/\$relationDatas = \[.*?\];/s';
                $templateContent = preg_replace($pattern, $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"; // Default admin level
            $type->write = "1";
            $type->read = "1";
            $type->modify = "1";
            $type->save();
        }

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