<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateMediaGalleriesStructure extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {

        if (!Schema::hasTable('media_gallery_items')) {
            Schema::create('media_gallery_items', function (Blueprint $table) {
                $table->bigIncrements('id');
                $table->unsignedBigInteger('backend_user_id')->nullable();
                $table->unsignedBigInteger('image_id');
                $table->unsignedBigInteger('exhibition_id');

                $table->nullableTimestamps();

                $table->foreign('backend_user_id')->references('id')
                    ->on('backend_users')->onDelete('SET NULL')->onUpdate('CASCADE');

                $table->foreign('image_id')
                    ->references('id')
                    ->on('media_items')
                    ->onDelete('CASCADE')
                    ->onUpdate('CASCADE');

                $table->foreign('exhibition_id')
                    ->references('id')
                    ->on('exhibitions')
                    ->onDelete('CASCADE')
                    ->onUpdate('CASCADE');
            });
        }

        if (!Schema::hasTable('media_gallery_item_languages')) {
            Schema::create('media_gallery_item_languages', function (Blueprint $table) {
                $table->bigIncrements('translation_id');
                $table->unsignedBigInteger('media_gallery_item_id');
                $table->string('language_id', 10);
                $table->string('title', 150);

                // Languages
                $table->unique(['media_gallery_item_id', 'language_id'], 'idx_media_gallery_item_lang');
                $table->foreign('media_gallery_item_id')
                    ->references('id')
                    ->on('media_gallery_items')
                    ->onDelete('CASCADE')
                    ->onUpdate('CASCADE');
            });
        }
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('media_gallery_item_languages');
        Schema::dropIfExists('media_gallery_items');
    }
}