package fs

import (
	"os"
	"os/user"
	"testing"

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

func TestFileExists(t *testing.T) {
	assert.True(t, FileExists("./testdata/test.jpg"))
	assert.False(t, FileExists("./foo.jpg"))
	assert.False(t, FileExists(""))
}

func TestPathExists(t *testing.T) {
	assert.True(t, PathExists("./testdata"))
	assert.False(t, PathExists("./testdata/test.jpg"))
	assert.False(t, PathExists("./testdata3ggdtgdg"))
}

func TestPathWritable(t *testing.T) {
	assert.True(t, PathExists("./testdata"))
	assert.False(t, PathExists("./testdata/test.jpg"))
	assert.False(t, PathExists("./testdata3ggdtgdg"))
}

func TestOverwrite(t *testing.T) {
	data := make([]byte, 3)
	data[1] = 3
	data[2] = 8
	tmpPath := "./testdata/_tmp"
	os.Mkdir(tmpPath, 0777)

	defer os.RemoveAll(tmpPath)
	result := Overwrite("./testdata/_tmp/notyetexisting.jpg", data)
	assert.FileExists(t, "./testdata/_tmp/notyetexisting.jpg")
	assert.True(t, result)
}

func TestExpandedFilename(t *testing.T) {
	t.Run("test.jpg", func(t *testing.T) {
		filename := Abs("./testdata/test.jpg")
		assert.Contains(t, filename, "/testdata/test.jpg")
		assert.IsType(t, "", filename)
	})
	t.Run("empty filename", func(t *testing.T) {
		filename := Abs("")
		assert.Equal(t, "", filename)
		assert.IsType(t, "", filename)
	})
	t.Run("~ in filename", func(t *testing.T) {
		usr, _ := user.Current()
		expected := usr.HomeDir + "/test.jpg"
		filename := Abs("~/test.jpg")
		assert.Equal(t, expected, filename)
		assert.IsType(t, "", filename)
	})
}

func TestDirectoryIsEmpty(t *testing.T) {
	t.Run("not empty path", func(t *testing.T) {
		assert.Equal(t, false, IsEmpty("./testdata"))
	})
	t.Run("not existing path", func(t *testing.T) {
		assert.Equal(t, false, IsEmpty("./xxx"))
	})
	t.Run("empty path", func(t *testing.T) {
		os.Mkdir("./testdata/emptyDir", 0777)
		defer os.RemoveAll("./testdata/emptyDir")
		assert.Equal(t, true, IsEmpty("./testdata/emptyDir"))
	})
}