package cache

import (
	"fmt"
	"time"
)

// CachedPage represents a cached HTML page
type CachedPage struct {
	Content     string
	ETag        string
	LastUpdated time.Time
	Compressed  []byte // Pre-compressed gzip content
}

// IsStale checks if the cached page is stale based on maxAge
func (cp *CachedPage) IsStale(maxAge time.Duration) bool {
	return time.Since(cp.LastUpdated) > maxAge
}

// GenerateETag generates an ETag for the content
func GenerateETag(content string) string {
	// Simple ETag based on content hash
	hash := 0
	for _, b := range []byte(content) {
		hash = hash*31 + int(b)
	}
	return fmt.Sprintf(`"%x"`, hash)
}