package utils

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestSplitLines(t *testing.T) {
	type scenario struct {
		multilineString string
		expected        []string
	}

	scenarios := []scenario{
		{
			"",
			[]string{},
		},
		{
			"\n",
			[]string{},
		},
		{
			"hello world !\nhello universe !\n",
			[]string{
				"hello world !",
				"hello universe !",
			},
		},
	}

	for _, s := range scenarios {
		assert.EqualValues(t, s.expected, SplitLines(s.multilineString))
	}
}

func TestWithPadding(t *testing.T) {
	type scenario struct {
		str      string
		padding  int
		expected string
	}

	scenarios := []scenario{
		{
			"hello world !",
			1,
			"hello world !",
		},
		{
			"hello world !",
			14,
			"hello world ! ",
		},
	}

	for _, s := range scenarios {
		assert.EqualValues(t, s.expected, WithPadding(s.str, s.padding))
	}
}

func TestTrimTrailingNewline(t *testing.T) {
	type scenario struct {
		str      string
		expected string
	}

	scenarios := []scenario{
		{
			"hello world !\n",
			"hello world !",
		},
		{
			"hello world !",
			"hello world !",
		},
	}

	for _, s := range scenarios {
		assert.EqualValues(t, s.expected, TrimTrailingNewline(s.str))
	}
}

func TestNormalizeLinefeeds(t *testing.T) {
	type scenario struct {
		byteArray []byte
		expected  []byte
	}
	var scenarios = []scenario{
		{
			// \r\n
			[]byte{97, 115, 100, 102, 13, 10},
			[]byte{97, 115, 100, 102, 10},
		},
		{
			// bash\r\nblah
			[]byte{97, 115, 100, 102, 13, 10, 97, 115, 100, 102},
			[]byte{97, 115, 100, 102, 10, 97, 115, 100, 102},
		},
		{
			// \r
			[]byte{97, 115, 100, 102, 13},
			[]byte{97, 115, 100, 102},
		},
		{
			// \n
			[]byte{97, 115, 100, 102, 10},
			[]byte{97, 115, 100, 102, 10},
		},
	}

	for _, s := range scenarios {
		assert.EqualValues(t, string(s.expected), NormalizeLinefeeds(string(s.byteArray)))
	}
}

func TestResolvePlaceholderString(t *testing.T) {
	type scenario struct {
		templateString string
		arguments      map[string]string
		expected       string
	}

	scenarios := []scenario{
		{
			"",
			map[string]string{},
			"",
		},
		{
			"hello",
			map[string]string{},
			"hello",
		},
		{
			"hello {{arg}}",
			map[string]string{},
			"hello {{arg}}",
		},
		{
			"hello {{arg}}",
			map[string]string{"arg": "there"},
			"hello there",
		},
		{
			"hello",
			map[string]string{"arg": "there"},
			"hello",
		},
		{
			"{{nothing}}",
			map[string]string{"nothing": ""},
			"",
		},
		{
			"{{}} {{ this }} { should not throw}} an {{{{}}}} error",
			map[string]string{
				"blah": "blah",
				"this": "won't match",
			},
			"{{}} {{ this }} { should not throw}} an {{{{}}}} error",
		},
	}

	for _, s := range scenarios {
		assert.EqualValues(t, string(s.expected), ResolvePlaceholderString(s.templateString, s.arguments))
	}
}