<?php

declare(strict_types=1);

namespace App\Framework\Queue\ValueObjects;

use App\Framework\Core\ValueObjects\Percentage;

final readonly class JobMetrics
{
    public function __construct(
        public string $jobId,
        public string $queueName,
        public string $status,
        public int $attempts,
        public int $maxAttempts,
        public float $executionTimeMs,
        public int $memoryUsageBytes,
        public ?string $errorMessage,
        public string $createdAt,
        public ?string $startedAt,
        public ?string $completedAt,
        public ?string $failedAt,
        public array $metadata = []
    ) {
    }

    public static function create(
        string $jobId,
        string $queueName,
        string $status = 'pending',
        int $attempts = 0,
        int $maxAttempts = 3
    ): self {
        $now = date('Y-m-d H:i:s');

        return new self(
            jobId: $jobId,
            queueName: $queueName,
            status: $status,
            attempts: $attempts,
            maxAttempts: $maxAttempts,
            executionTimeMs: 0.0,
            memoryUsageBytes: 0,
            errorMessage: null,
            createdAt: $now,
            startedAt: null,
            completedAt: null,
            failedAt: null,
            metadata: []
        );
    }

    public function withStarted(float $executionStartTime, int $memoryUsage): self
    {
        return new self(
            jobId: $this->jobId,
            queueName: $this->queueName,
            status: 'running',
            attempts: $this->attempts + 1,
            maxAttempts: $this->maxAttempts,
            executionTimeMs: $executionStartTime,
            memoryUsageBytes: $memoryUsage,
            errorMessage: $this->errorMessage,
            createdAt: $this->createdAt,
            startedAt: date('Y-m-d H:i:s'),
            completedAt: $this->completedAt,
            failedAt: $this->failedAt,
            metadata: $this->metadata
        );
    }

    public function withCompleted(float $totalExecutionTime, int $peakMemoryUsage): self
    {
        return new self(
            jobId: $this->jobId,
            queueName: $this->queueName,
            status: 'completed',
            attempts: $this->attempts,
            maxAttempts: $this->maxAttempts,
            executionTimeMs: $totalExecutionTime,
            memoryUsageBytes: $peakMemoryUsage,
            errorMessage: $this->errorMessage,
            createdAt: $this->createdAt,
            startedAt: $this->startedAt,
            completedAt: date('Y-m-d H:i:s'),
            failedAt: $this->failedAt,
            metadata: $this->metadata
        );
    }

    public function withFailed(string $errorMessage, float $executionTime, int $memoryUsage): self
    {
        return new self(
            jobId: $this->jobId,
            queueName: $this->queueName,
            status: 'failed',
            attempts: $this->attempts,
            maxAttempts: $this->maxAttempts,
            executionTimeMs: $executionTime,
            memoryUsageBytes: $memoryUsage,
            errorMessage: $errorMessage,
            createdAt: $this->createdAt,
            startedAt: $this->startedAt,
            completedAt: $this->completedAt,
            failedAt: date('Y-m-d H:i:s'),
            metadata: $this->metadata
        );
    }

    public function withMetadata(array $metadata): self
    {
        return new self(
            jobId: $this->jobId,
            queueName: $this->queueName,
            status: $this->status,
            attempts: $this->attempts,
            maxAttempts: $this->maxAttempts,
            executionTimeMs: $this->executionTimeMs,
            memoryUsageBytes: $this->memoryUsageBytes,
            errorMessage: $this->errorMessage,
            createdAt: $this->createdAt,
            startedAt: $this->startedAt,
            completedAt: $this->completedAt,
            failedAt: $this->failedAt,
            metadata: array_merge($this->metadata, $metadata)
        );
    }

    public function getSuccessRate(): Percentage
    {
        if ($this->attempts === 0) {
            return Percentage::from(100.0);
        }

        $successfulAttempts = $this->status === 'completed' ? 1 : 0;

        return Percentage::from(($successfulAttempts / max(1, $this->attempts)) * 100);
    }

    public function getExecutionTimeSeconds(): float
    {
        return $this->executionTimeMs / 1000.0;
    }

    public function getMemoryUsageMB(): float
    {
        return $this->memoryUsageBytes / (1024 * 1024);
    }

    public function getDuration(): ?int
    {
        if (! $this->startedAt) {
            return null;
        }

        $endTime = $this->completedAt ?? $this->failedAt ?? date('Y-m-d H:i:s');

        return strtotime($endTime) - strtotime($this->startedAt);
    }

    public function isCompleted(): bool
    {
        return $this->status === 'completed';
    }

    public function isFailed(): bool
    {
        return $this->status === 'failed';
    }

    public function isRunning(): bool
    {
        return $this->status === 'running';
    }

    public function isPending(): bool
    {
        return $this->status === 'pending';
    }

    public function hasMaxAttempts(): bool
    {
        return $this->attempts >= $this->maxAttempts;
    }

    public function toArray(): array
    {
        return [
            'job_id' => $this->jobId,
            'queue_name' => $this->queueName,
            'status' => $this->status,
            'attempts' => $this->attempts,
            'max_attempts' => $this->maxAttempts,
            'execution_time_ms' => $this->executionTimeMs,
            'execution_time_seconds' => $this->getExecutionTimeSeconds(),
            'memory_usage_bytes' => $this->memoryUsageBytes,
            'memory_usage_mb' => $this->getMemoryUsageMB(),
            'success_rate' => $this->getSuccessRate()->getValue(),
            'duration_seconds' => $this->getDuration(),
            'error_message' => $this->errorMessage,
            'created_at' => $this->createdAt,
            'started_at' => $this->startedAt,
            'completed_at' => $this->completedAt,
            'failed_at' => $this->failedAt,
            'metadata' => $this->metadata,
        ];
    }
}