package queue

import (
	"time"
)

/*
Queue Configuration and Constants

This package provides a Redis-based job queue system for managing
document scraping tasks in a distributed manner.
*/

const (
	// Queue names
	DocumentScraperQueue = "scraper:document:queue"
	DocumentScraperDLQ   = "scraper:document:dlq" // Dead Letter Queue

	// Job status keys
	JobStatusPrefix = "job:"
	QueueMetricsKey = "queue:metrics"

	// Default timeouts
	DefaultJobTimeout    = 5 * time.Minute
	DefaultMaxRetries    = 3
	DefaultRetryBackoff  = 10 * time.Second
	MaxRetryBackoff      = 5 * time.Minute  // Cap retry backoff at 5 minutes
	InProgressExpiration = 10 * time.Minute // Job must complete within this time
)

// QueueConfig represents configuration for the queue service
type QueueConfig struct {
	RedisURL       string
	MaxRetries     int
	RetryBackoff   time.Duration
	JobTimeout     time.Duration
	PoolSize       int
	IsDLQEnabled   bool
	MaxQueueLength int // 0 means unlimited
}

// DefaultConfig returns default queue configuration
func DefaultConfig() QueueConfig {
	return QueueConfig{
		RedisURL:       "redis://localhost:6379",
		MaxRetries:     DefaultMaxRetries,
		RetryBackoff:   DefaultRetryBackoff,
		JobTimeout:     DefaultJobTimeout,
		PoolSize:       10,
		IsDLQEnabled:   true,
		MaxQueueLength: 0, // Unlimited by default
	}
}