package main

import (
	"collatz/collatz"
	"collatz/parsing"
	"log"
	"strings"
)

func main() {
	sequence, err := runCollatz()
	if err != nil {
		log.Fatalf("Error calculating Collatz: %v", err)
	}
	printSequence(sequence)
}

func printSequence(sequence collatz.Sequence) {
	builder := new(strings.Builder)
	log.Printf("Collatz sequence with %d iterations:", sequence.Iterations)
	for i, num := range sequence.Sequence {
		if i != 0 {
			builder.WriteString("\n-> ")
		}
		builder.WriteString(num.String())
	}
	log.Println(builder.String())
}

func runCollatz() (collatz.Sequence, error) {
	parser := new(parsing.Cliargs)
	calculator := collatz.NewCalculator(parser)
	sequence, err := calculator.CalculateCollatz()
	return sequence, err
}