<?php

declare(strict_types=1);

namespace App\Framework\Cache\Warming\ValueObjects;

/**
 * Result of a cache warmup operation
 */
final readonly class WarmupResult
{
    public function __construct(
        public string $strategyName,
        public int $itemsWarmed,
        public int $itemsFailed,
        public float $durationSeconds,
        public int $memoryUsedBytes,
        public array $errors = [],
        public array $metadata = []
    ) {
        if ($itemsWarmed < 0) {
            throw new \InvalidArgumentException('Items warmed cannot be negative');
        }
        if ($itemsFailed < 0) {
            throw new \InvalidArgumentException('Items failed cannot be negative');
        }
        if ($durationSeconds < 0.0) {
            throw new \InvalidArgumentException('Duration cannot be negative');
        }
        if ($memoryUsedBytes < 0) {
            throw new \InvalidArgumentException('Memory used cannot be negative');
        }
    }

    public function isSuccess(): bool
    {
        return $this->itemsFailed === 0;
    }

    public function getSuccessRate(): float
    {
        $total = $this->itemsWarmed + $this->itemsFailed;
        if ($total === 0) {
            return 0.0;
        }
        return $this->itemsWarmed / $total;
    }

    public function getItemsPerSecond(): float
    {
        if ($this->durationSeconds === 0.0) {
            return 0.0;
        }
        return $this->itemsWarmed / $this->durationSeconds;
    }

    public function getMemoryUsedMB(): float
    {
        return $this->memoryUsedBytes / 1024 / 1024;
    }

    public function toArray(): array
    {
        return [
            'strategy_name' => $this->strategyName,
            'items_warmed' => $this->itemsWarmed,
            'items_failed' => $this->itemsFailed,
            'duration_seconds' => $this->durationSeconds,
            'memory_used_bytes' => $this->memoryUsedBytes,
            'memory_used_mb' => round($this->getMemoryUsedMB(), 2),
            'success_rate' => round($this->getSuccessRate() * 100, 2),
            'items_per_second' => round($this->getItemsPerSecond(), 2),
            'is_success' => $this->isSuccess(),
            'errors' => $this->errors,
            'metadata' => $this->metadata
        ];
    }
}