package one

import (
	"bytes"
	"strconv"
	"strings"
)

type operand int
type instructionFn func(operand) (int, bool, int, bool)

func Solve(buf []byte) (string, error) {
	r := bytes.NewReader(buf)
	registers, program, err := parseLines(r)
	if err != nil {
		return "", err
	}

	computer := newComputer(registers)
	results := computer.run(program)

	var sb strings.Builder
	for i, n := range results {
		sb.WriteString(strconv.Itoa(n))
		if i < len(results)-1 {
			sb.WriteRune(',')
		}
	}

	return sb.String(), nil
}