<?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('ai_usage_logs', function (Blueprint $table) {
            $table->id();
            $table->foreignId('user_id')->nullable()->constrained()->onDelete('set null');
            $table->string('provider');
            $table->string('model');
            $table->longText('prompt')->nullable();
            $table->longText('response')->nullable();
            $table->integer('prompt_tokens')->default(0);
            $table->integer('completion_tokens')->default(0);
            $table->integer('total_tokens')->default(0);
            $table->decimal('estimated_cost', 10, 6)->default(0);
            $table->string('status')->default('success'); // success, failed
            $table->text('error_message')->nullable();
            $table->json('metadata')->nullable();
            $table->timestamps();
        });
    }

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