refactor: make not ugly

cmd/10/machine/machine.go

@@ -0,0 +1,117 @@
+// Package machine defines a model for a machine and methods to manipulate it.
+package machine
+
+import (
+	"math"
+	"regexp"
+	"slices"
+	"strconv"
+	"strings"
+
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/10/button"
+)
+
+type Machine interface {
+	ConfigureLights() int
+}
+
+type machine struct {
+	desiredLightState []bool
+	buttons           []button.Button
+	desiredJoltages   []int
+}
+
+func From(line string) Machine {
+	parts := strings.Split(line, " ")
+	lastPartIndex := len(parts) - 1
+
+	lightDiagramPart := parts[0]
+	desiredLightState := []bool{}
+
+	for _, c := range lightDiagramPart {
+		if c == '.' {
+			desiredLightState = append(desiredLightState, false)
+		}
+
+		if c == '#' {
+			desiredLightState = append(desiredLightState, true)
+		}
+	}
+
+	buttonsPart := parts[1:lastPartIndex]
+
+	buttons := []button.Button{}
+
+	for _, bs := range buttonsPart {
+		b := button.From(bs)
+		buttons = append(buttons, b)
+	}
+
+	joltagesPart := parts[lastPartIndex]
+	desiredJoltages := []int{}
+	joltageRegex := regexp.MustCompile(`\d+`)
+	matches := joltageRegex.FindAllString(joltagesPart, -1)
+
+	for _, m := range matches {
+		num, _ := strconv.Atoi(m)
+		desiredJoltages = append(desiredJoltages, num)
+	}
+
+	return machine{
+		desiredLightState: desiredLightState,
+		buttons:           buttons,
+		desiredJoltages:   desiredJoltages,
+	}
+}
+
+func (m machine) ConfigureLights() int {
+	combinations := [][]bool{}
+	minPresses := math.MaxInt
+	numberOfButtons := len(m.buttons)
+	numberOfCombinations := int(math.Pow(2, float64(numberOfButtons)))
+	currentCombination := make([]bool, numberOfButtons)
+
+	for range numberOfCombinations {
+		temp := make([]bool, numberOfButtons)
+		copy(temp, currentCombination)
+
+		combinations = append(combinations, temp)
+
+		for j := range numberOfButtons {
+			if currentCombination[j] == false {
+				currentCombination[j] = true
+				break
+			} else {
+				currentCombination[j] = false
+			}
+		}
+	}
+
+	for _, currentCombination := range combinations {
+		currentPresses := 0
+		initialLightState := make([]bool, len(m.desiredLightState))
+
+		for bi, bs := range currentCombination {
+			if bs == false {
+				continue
+			}
+
+			currentPresses++
+			switchesToToggle := m.buttons[bi].Switches()
+
+			for _, switchToToggle := range switchesToToggle {
+				initialLightState[switchToToggle] = !initialLightState[switchToToggle]
+			}
+		}
+
+		if slices.Equal(initialLightState, m.desiredLightState) == false {
+			continue
+		}
+
+		if currentPresses < minPresses {
+			minPresses = currentPresses
+		}
+	}
+
+	return minPresses
+}