<?php

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

/**
 * Creates the "relationships" table.
 *
 * Social graph between characters: friends, spouses and parent-child links.
 * For parent_child, character_a is the child and character_b is the parent.
 */
return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::create('relationships', function (Blueprint $table): void {
            $table->id();
            $table->foreignId('character_a_id')->constrained('characters')->cascadeOnDelete();
            $table->foreignId('character_b_id')->constrained('characters')->cascadeOnDelete();
            $table->string('type', 30);
            $table->string('status', 20)->default('pending');
            $table->timestamps();

            $table->unique(['character_a_id', 'character_b_id', 'type']);
            $table->index(['character_b_id', 'type', 'status']);
        });
    }

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