package gemlog

import (
	"crypto/rand"
	"encoding/hex"
	"fmt"
	"time"
)

// GemlogEntry represents a single gemlog post entry
type GemlogEntry struct {
	Title  string    `json:"title"`
	Slug   string    `json:"slug"`
	Date   time.Time `json:"date"`
	Tags   []string  `json:"tags"`
	Gemtxt string    `json:"gemtxt"`
}

type GemlogListEntry struct {
	Title string    `json:"title"`
	Slug  string    `json:"slug"`
	Date  time.Time `json:"date"`
	ID    string    `json:"id"`
	Rev   string    `json:"rev"`
}

// NewUUID generates a new UUID v4 using crypto/rand
func NewUUID() (string, error) {
	uuid := make([]byte, 16)
	_, err := rand.Read(uuid)
	if err != nil {
		return "", fmt.Errorf("failed to generate UUID: %w", err)
	}

	// Set version (4) and variant bits according to RFC 4122
	uuid[6] = (uuid[6] & 0x0f) | 0x40 // Version 4
	uuid[8] = (uuid[8] & 0x3f) | 0x80 // Variant bits

	// Format as standard UUID string: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
	return fmt.Sprintf("%s-%s-%s-%s-%s",
		hex.EncodeToString(uuid[0:4]),
		hex.EncodeToString(uuid[4:6]),
		hex.EncodeToString(uuid[6:8]),
		hex.EncodeToString(uuid[8:10]),
		hex.EncodeToString(uuid[10:16]),
	), nil
}