<?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('announcements', function (Blueprint $table) {
            $table->id();

            // 基本資訊
            $table->string('title');
            $table->text('content');

            // 狀態管理
            $table->enum('status', ['draft', 'published', 'archived'])->default('draft');

            // 顯示控制
            $table->boolean('is_pinned')->default(false);
            $table->integer('display_order')->default(0);

            // 訪問控制
            $table->enum('access_level', ['public', 'members', 'board', 'admin'])->default('members');

            // 時間控制
            $table->timestamp('published_at')->nullable();
            $table->timestamp('expires_at')->nullable();
            $table->timestamp('archived_at')->nullable();

            // 統計
            $table->integer('view_count')->default(0);

            // 用戶關聯
            $table->foreignId('created_by_user_id')->constrained('users')->onDelete('cascade');
            $table->foreignId('last_updated_by_user_id')->nullable()->constrained('users')->onDelete('set null');

            $table->timestamps();
            $table->softDeletes();

            // 索引
            $table->index('status');
            $table->index('access_level');
            $table->index('published_at');
            $table->index('expires_at');
            $table->index(['is_pinned', 'display_order']);
        });
    }

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