<?php

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

return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::create('tg_chats', function (Blueprint $table) {
            $table->id(); // Laravel 主鍵
            $table->bigInteger('chat_id')->unique();   // Telegram 群組/頻道 ID（可能為負數）
            $table->string('type')->nullable()->comment('群类型');                 // group、supergroup、channel、private
            $table->string('title')->nullable()->comment('群名稱');
            $table->string('creator')->nullable()->comment('群主ID');
            $table->text('description')->nullable()->comment('群組描述');           // 群組描述（如有）
            $table->string('invite_link')->nullable()->comment('群組邀請連結');      // 群組邀請連結（如有）

            // 可選擴充
            $table->string('photo_small_file_id')->nullable()->comment('群头像160x160');
            $table->string('photo_big_file_id')->nullable()->comment('群头像640x640');

            $table->timestamps(); // 建立/更新時間
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('tg_chats');
    }
};