// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package base

import (
	"testing"

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

func TestEncodeMD5(t *testing.T) {
	assert.Equal(t,
		"3858f62230ac3c915f300c664312c63f",
		EncodeMD5("foobar"),
	)
}

func TestEncodeSha1(t *testing.T) {
	assert.Equal(t,
		"8843d7f92416211de9ebb963ff4ce28125932878",
		EncodeSha1("foobar"),
	)
}

func TestEncodeSha256(t *testing.T) {
	assert.Equal(t,
		"c3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2",
		EncodeSha256("foobar"),
	)
}

func TestShortSha(t *testing.T) {
	assert.Equal(t, "veryverylo", ShortSha("veryverylong"))
}

func TestBasicAuthDecode(t *testing.T) {
	_, _, err := BasicAuthDecode("?")
	assert.Equal(t, "illegal base64 data at input byte 0", err.Error())

	user, pass, err := BasicAuthDecode("Zm9vOmJhcg==")
	assert.NoError(t, err)
	assert.Equal(t, "foo", user)
	assert.Equal(t, "bar", pass)
}

func TestBasicAuthEncode(t *testing.T) {
	assert.Equal(t, "Zm9vOmJhcg==", BasicAuthEncode("foo", "bar"))
}

// TODO: Test PBKDF2()
// TODO: Test VerifyTimeLimitCode()
// TODO: Test CreateTimeLimitCode()

func TestFileSize(t *testing.T) {
	var size int64 = 512
	assert.Equal(t, "512 B", FileSize(size))
	size *= 1024
	assert.Equal(t, "512 KiB", FileSize(size))
	size *= 1024
	assert.Equal(t, "512 MiB", FileSize(size))
	size *= 1024
	assert.Equal(t, "512 GiB", FileSize(size))
	size *= 1024
	assert.Equal(t, "512 TiB", FileSize(size))
	size *= 1024
	assert.Equal(t, "512 PiB", FileSize(size))
	size *= 4
	assert.Equal(t, "2.0 EiB", FileSize(size))
}

func TestSubtract(t *testing.T) {
	toFloat64 := func(n interface{}) float64 {
		switch v := n.(type) {
		case int:
			return float64(v)
		case int8:
			return float64(v)
		case int16:
			return float64(v)
		case int32:
			return float64(v)
		case int64:
			return float64(v)
		case float32:
			return float64(v)
		case float64:
			return v
		default:
			return 0.0
		}
	}
	values := []interface{}{
		int(-3),
		int8(14),
		int16(81),
		int32(-156),
		int64(1528),
		float32(3.5),
		float64(-15.348),
	}
	for _, left := range values {
		for _, right := range values {
			expected := toFloat64(left) - toFloat64(right)
			sub := Subtract(left, right)
			assert.InDelta(t, expected, sub, 1e-3)
		}
	}
}

func TestEllipsisString(t *testing.T) {
	assert.Equal(t, "...", EllipsisString("foobar", 0))
	assert.Equal(t, "...", EllipsisString("foobar", 1))
	assert.Equal(t, "...", EllipsisString("foobar", 2))
	assert.Equal(t, "...", EllipsisString("foobar", 3))
	assert.Equal(t, "f...", EllipsisString("foobar", 4))
	assert.Equal(t, "fo...", EllipsisString("foobar", 5))
	assert.Equal(t, "foobar", EllipsisString("foobar", 6))
	assert.Equal(t, "foobar", EllipsisString("foobar", 10))
}

func TestTruncateString(t *testing.T) {
	assert.Equal(t, "", TruncateString("foobar", 0))
	assert.Equal(t, "f", TruncateString("foobar", 1))
	assert.Equal(t, "fo", TruncateString("foobar", 2))
	assert.Equal(t, "foo", TruncateString("foobar", 3))
	assert.Equal(t, "foob", TruncateString("foobar", 4))
	assert.Equal(t, "fooba", TruncateString("foobar", 5))
	assert.Equal(t, "foobar", TruncateString("foobar", 6))
	assert.Equal(t, "foobar", TruncateString("foobar", 7))
}

func TestStringsToInt64s(t *testing.T) {
	testSuccess := func(input []string, expected []int64) {
		result, err := StringsToInt64s(input)
		assert.NoError(t, err)
		assert.Equal(t, expected, result)
	}
	testSuccess([]string{}, []int64{})
	testSuccess([]string{"-1234"}, []int64{-1234})
	testSuccess([]string{"1", "4", "16", "64", "256"},
		[]int64{1, 4, 16, 64, 256})

	_, err := StringsToInt64s([]string{"-1", "a", "$"})
	assert.Error(t, err)
}

func TestInt64sToStrings(t *testing.T) {
	assert.Equal(t, []string{}, Int64sToStrings([]int64{}))
	assert.Equal(t,
		[]string{"1", "4", "16", "64", "256"},
		Int64sToStrings([]int64{1, 4, 16, 64, 256}),
	)
}

func TestInt64sToMap(t *testing.T) {
	assert.Equal(t, map[int64]bool{}, Int64sToMap([]int64{}))
	assert.Equal(t,
		map[int64]bool{1: true, 4: true, 16: true},
		Int64sToMap([]int64{1, 4, 16}),
	)
}

func TestIsLetter(t *testing.T) {
	assert.True(t, IsLetter('a'))
	assert.True(t, IsLetter('e'))
	assert.True(t, IsLetter('q'))
	assert.True(t, IsLetter('z'))
	assert.True(t, IsLetter('A'))
	assert.True(t, IsLetter('E'))
	assert.True(t, IsLetter('Q'))
	assert.True(t, IsLetter('Z'))
	assert.True(t, IsLetter('_'))
	assert.False(t, IsLetter('-'))
	assert.False(t, IsLetter('1'))
	assert.False(t, IsLetter('$'))
}

func TestIsTextFile(t *testing.T) {
	assert.True(t, IsTextFile([]byte{}))
	assert.True(t, IsTextFile([]byte("lorem ipsum")))
}

func TestFormatNumberSI(t *testing.T) {
	assert.Equal(t, "125", FormatNumberSI(int(125)))
	assert.Equal(t, "1.3k", FormatNumberSI(int64(1317)))
	assert.Equal(t, "21.3M", FormatNumberSI(21317675))
	assert.Equal(t, "45.7G", FormatNumberSI(45721317675))
	assert.Equal(t, "", FormatNumberSI("test"))
}

// TODO: IsImageFile(), currently no idea how to test
// TODO: IsPDFFile(), currently no idea how to test