<?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('timeline_years', function (Blueprint $table) {
            $table->id();
            $table->foreignId('group_id')->constrained('timeline_groups')->onDelete('cascade');
            $table->integer('year');
            $table->string('image')->nullable();
            $table->integer('sort')->default(999);
            $table->enum('status', ['draft', 'publish'])->default('publish');
            $table->dateTime('published_at')->nullable();
            $table->timestamps();

            // Indexes
            $table->index('sort');
            $table->index('status');
            $table->index('published_at');

            // Unique constraint: year must be unique within a group
            $table->unique(['group_id', 'year']);
        });
    }

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