<?php

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

return new class extends Migration
{
    /**
     * Named, user-owned server configs ("llama.cpp DFlash spec-decode, 131k
     * ctx"). The full harness args that /props cannot expose live here;
     * runs link via config_id and the identity joins the session grouping
     * key — same hardware + model but a different draft model or
     * reasoning-budget regroups into its own session.
     */
    public function up(): void
    {
        Schema::create('server_configs', function (Blueprint $table) {
            $table->id();
            $table->foreignId('user_id')->constrained()->cascadeOnDelete();
            $table->string('name', 128);
            $table->string('engine', 64)->default('llama.cpp');
            $table->text('config_yaml')->comment('full harness args (YAML blob or argv list)');
            $table->timestamps();

            $table->unique(['user_id', 'name']);
        });

        Schema::table('benchmark_runs', function (Blueprint $table) {
            $table->foreignId('config_id')->nullable()->after('gpu_source')
                ->constrained('server_configs')->nullOnDelete();
        });
    }

    public function down(): void
    {
        Schema::table('benchmark_runs', function (Blueprint $table) {
            $table->dropConstrainedForeignId('config_id');
        });
        Schema::dropIfExists('server_configs');
    }
};