package remove

import (
	"testing"

	"github.com/stretchr/testify/assert"

	"b612.me/apps/b612/gdu/internal/testdir"
	"b612.me/apps/b612/gdu/pkg/analyze"
	"b612.me/apps/b612/gdu/pkg/fs"
)

func TestTruncateFile(t *testing.T) {
	fin := testdir.CreateTestDir()
	defer fin()

	dir := &analyze.Dir{
		File: &analyze.File{
			Name:  "test_dir",
			Size:  5,
			Usage: 12,
		},
		ItemCount: 3,
		BasePath:  ".",
	}

	subdir := &analyze.Dir{
		File: &analyze.File{
			Name:   "nested",
			Size:   4,
			Usage:  8,
			Parent: dir,
		},
		ItemCount: 2,
	}
	file := &analyze.File{
		Name:   "file2",
		Size:   3,
		Usage:  4,
		Parent: subdir,
	}
	dir.Files = fs.Files{subdir}
	subdir.Files = fs.Files{file}

	err := EmptyFileFromDir(subdir, file)

	assert.Nil(t, err)
	assert.Equal(t, 1, len(subdir.Files))
	assert.Equal(t, 2, subdir.ItemCount)
	assert.Equal(t, int64(1), subdir.Size)
	assert.Equal(t, int64(4), subdir.Usage)
	assert.Equal(t, 1, len(dir.Files))
	assert.Equal(t, 3, dir.ItemCount)
	assert.Equal(t, int64(2), dir.Size)
}

func TestRemoveFile(t *testing.T) {
	dir := &analyze.Dir{
		File: &analyze.File{
			Name:  "xxx",
			Size:  5,
			Usage: 12,
		},
		ItemCount: 3,
		BasePath:  ".",
	}

	subdir := &analyze.Dir{
		File: &analyze.File{
			Name:   "yyy",
			Size:   4,
			Usage:  8,
			Parent: dir,
		},
		ItemCount: 2,
	}
	file := &analyze.File{
		Name:   "zzz",
		Size:   3,
		Usage:  4,
		Parent: subdir,
	}
	dir.Files = fs.Files{subdir}
	subdir.Files = fs.Files{file}

	err := ItemFromDir(subdir, file)
	assert.Nil(t, err)

	assert.Equal(t, 0, len(subdir.Files))
	assert.Equal(t, 1, subdir.ItemCount)
	assert.Equal(t, int64(1), subdir.Size)
	assert.Equal(t, int64(4), subdir.Usage)
	assert.Equal(t, 1, len(dir.Files))
	assert.Equal(t, 2, dir.ItemCount)
	assert.Equal(t, int64(2), dir.Size)
}

func TestTruncateFileWithErr(t *testing.T) {
	dir := &analyze.Dir{
		File: &analyze.File{
			Name:  "xxx",
			Size:  5,
			Usage: 12,
		},
		ItemCount: 3,
		BasePath:  ".",
	}

	subdir := &analyze.Dir{
		File: &analyze.File{
			Name:   "yyy",
			Size:   4,
			Usage:  8,
			Parent: dir,
		},
		ItemCount: 2,
	}
	file := &analyze.File{
		Name:   "zzz",
		Size:   3,
		Usage:  4,
		Parent: subdir,
	}
	dir.Files = fs.Files{subdir}
	subdir.Files = fs.Files{file}

	err := EmptyFileFromDir(subdir, file)

	assert.Contains(t, err.Error(), "no such file or directory")
}