package main

import (
	"fmt"
	"math/rand"
	"time"
)

// Base62 characters
const base62 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"

// Converts a number to Base-62
func toBase62(num int64) string {
	result := ""
	for num > 0 {
		result = string(base62[num%62]) + result
		num /= 62
	}
	return result
}

// Generate an 8-character unique ID
func generateID() string {
	EPOCH_START := time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC)
	now := time.Now().UTC().UnixMilli() - EPOCH_START.UnixMilli()
	random := rand.Intn(1000) // 3-digit random number (000-999)
	id := now*1000 + int64(random) // Combine timestamp + randomness
	return fmt.Sprintf("%08s", toBase62(id))[:8] // Ensure fixed 8 chars
}

func main() {
	fmt.Println(generateID()) // Example output: "5F3G8kL2"
}