<?php

namespace Database\Factories;

use App\Models\Backtest;
use Illuminate\Database\Eloquent\Factories\Factory;

/** @extends Factory<Backtest> */
class BacktestFactory extends Factory
{
    public function definition(): array
    {
        return [
            'model_version' => 'test-'.fake()->unique()->bothify('????????'),
            'features_json' => ['features' => ['delta_ulsp_lag_0']],
            'coefficients_json' => null,
            'train_start' => '2018-01-01',
            'train_end' => '2024-01-01',
            'eval_start' => '2024-01-08',
            'eval_end' => '2026-04-27',
            'directional_accuracy' => fake()->randomFloat(2, 50, 75),
            'mae_pence' => fake()->randomFloat(2, 0.4, 1.0),
            'calibration_table' => ['0.0-0.5' => 0.55, '0.5-1.0' => 0.65, '1.0+' => 0.72],
            'leak_suspected' => false,
            'ran_at' => now(),
        ];
    }
}
