package part_01

import "testing"

func TestParseTimeLine(t *testing.T) {
	tests := map[string]struct {
		input    string
		expected []int
	}{
		"empty":  {"", []int{}},
		"sample": {"Time:      7  15   30", []int{7, 15, 30}},
	}

	for name, test := range tests {
		t.Run(name, func(t *testing.T) {
			actual := parseTimeLine(test.input)
			if len(actual) != len(test.expected) {
				t.Errorf("Expected %d, got %d", len(test.expected), len(actual))
			}
			for i := 0; i < len(actual); i++ {
				if actual[i] != test.expected[i] {
					t.Errorf("Expected %d, got %d", test.expected[i], actual[i])
				}
			}
		})
	}
}

func TestParseDistLine(t *testing.T) {
	tests := map[string]struct {
		input    string
		expected []int
	}{
		"empty":  {"", []int{}},
		"sample": {"Distance:  9  40  200", []int{9, 40, 200}},
	}

	for name, test := range tests {
		t.Run(name, func(t *testing.T) {
			actual := parseDistanceLine(test.input)
			if len(actual) != len(test.expected) {
				t.Errorf("Expected %d, got %d", len(test.expected), len(actual))
			}
			for i := 0; i < len(actual); i++ {
				if actual[i] != test.expected[i] {
					t.Errorf("Expected %d, got %d", test.expected[i], actual[i])
				}
			}
		})
	}
}

func TestCalculateAnswer(t *testing.T) {
	tests := map[string]struct {
		times     []int
		distances []int
		expected  int
	}{
		"sample": {[]int{7, 15, 30}, []int{9, 40, 200}, 288},
	}

	for name, test := range tests {
		t.Run(name, func(t *testing.T) {
			actual := calculateAnswer(test.times, test.distances)
			if actual != test.expected {
				t.Errorf("Expected %d, got %d", test.expected, actual)
			}
		})
	}
}

func TestCalculateDistance(t *testing.T) {
	tests := map[string]struct {
		maxTime          int
		buttonPressedFor int
		expected         int
	}{
		"7_7": {7, 7, 0},
		"7_6": {7, 6, 6},
		"7_5": {7, 5, 10},
		"7_4": {7, 4, 12},
		"7_3": {7, 3, 12},
		"7_2": {7, 2, 10},
		"7_1": {7, 1, 6},
		"7_0": {7, 0, 0},
	}

	for name, test := range tests {
		t.Run(name, func(t *testing.T) {
			actual := calculateDistance(test.buttonPressedFor, test.maxTime)
			if actual != test.expected {
				t.Errorf("Expected %d, got %d", test.expected, actual)
			}
		})
	}
}