// Copyright 2019 Sorint.lab
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
// See the License for the specific language governing permissions and
// limitations under the License.

package objectstorage

import (
	"bytes"
	"io/ioutil"
	"os"
	"path/filepath"
	"testing"

	errors "golang.org/x/xerrors"
)

func TestEscapeUnescape(t *testing.T) {
	tests := []struct {
		in       string
		expected string
		err      error
	}{
		{"", "", nil},
		{"/", "%2F", nil},
		{"//", "%2F%2F", nil},
		{"☺", "☺", nil},
		{"☺☺☺☺☺☺☺☺", "☺☺☺☺☺☺☺☺.f", nil},
		{"☺☺☺☺☺☺☺☺", "☺☺☺☺☺☺☺☺.f", nil},
		{"☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺", "☺☺☺☺☺☺☺☺/☺☺☺☺☺☺☺☺.f", nil},
		{"☺☺☺☺a☺☺☺☺☺☺☺☺☺☺☺", "☺☺☺☺a☺☺☺/☺☺☺☺☺☺☺☺.f", nil},
		{"☺☺☺☺a☺☺☺☺☺☺b☺☺☺☺", "☺☺☺☺a☺☺☺/☺☺☺b☺☺☺☺.f", nil},
		{"⌘", "⌘", nil},
		{"⌘⌘⌘⌘⌘⌘⌘⌘⌘⌘⌘", "⌘⌘⌘⌘⌘⌘⌘⌘/⌘⌘⌘", nil},

		// These are 16 chars on purpose to test the filemarker behavior
		{"s3/is/not/a/file", "s3%2Fis%2Fno/t%2Fa%2Ffile.f", nil},
		{"s3/is/nota/file/", "s3%2Fis%2Fno/ta%2Ffile%2F.f", nil},
		{"s3/is/nota/files", "s3%2Fis%2Fno/ta%2Ffiles.f", nil},
		{"s3/is/nota/fil.f", "s3%2Fis%2Fno/ta%2Ffil.f.f", nil},

		{"s3/is/nota/fil.fa", "s3%2Fis%2Fno/ta%2Ffil.f/a", nil},
		{"/s3/is/nota/fil.fa/", "%2Fs3%2Fis%2Fn/ota%2Ffil./fa%2F", nil},
		{"s3/is/not/a/file///system/fi%l%%e01", "s3%2Fis%2Fno/t%2Fa%2Ffile/%2F%2F%2Fsyste/m%2Ffi%25l%25%25/e01", nil},
		{"s3/is/not/a/file///system/file01", "s3%2Fis%2Fno/t%2Fa%2Ffile/%2F%2F%2Fsyste/m%2Ffile01.f", nil},
		{"s3/is/not/a/file///system/file01/", "s3%2Fis%2Fno/t%2Fa%2Ffile/%2F%2F%2Fsyste/m%2Ffile01/%2F", nil},
		{"s3/is/not/a/file///system/file01/a", "s3%2Fis%2Fno/t%2Fa%2Ffile/%2F%2F%2Fsyste/m%2Ffile01/%2Fa", nil},
	}

	for i, tt := range tests {
		out := escape(tt.in)
		if out != tt.expected {
			t.Errorf("%d: escape: expected %q got %q", i, tt.expected, out)
		}

		unescaped, _, err := unescape(out)
		if err != nil {
			if tt.err == nil {
				t.Errorf("%d: unescape: expected no error got %v", i, err)
			} else if !errors.Is(tt.err, err) {
				t.Errorf("%d: unescape: expected error %v got %v", i, tt.err, err)
			}
		} else {
			if tt.err != nil {
				t.Errorf("%d: unescape: expected error %v got no error", i, tt.err)
			} else if unescaped != tt.in {
				t.Errorf("%d: unescape: expected %q got %q", i, tt.in, unescaped)
			}
		}
	}
}

func TestPosixFlatDeleteObject(t *testing.T) {
	objects := []string{"/", "//", "☺☺☺☺a☺☺☺☺☺☺b☺☺☺☺", "s3/is/nota/fil.fa", "s3/is/not/a/file///system/fi%l%%e01"}

	dir, err := ioutil.TempDir("", "objectstorage")
	if err != nil {
		t.Fatalf("unexpected err: %v", err)
	}
	//defer os.RemoveAll(dir)

	ls, err := NewPosixFlat(dir)
	if err != nil {
		t.Fatalf("unexpected err: %v", err)
	}

	for _, obj := range objects {
		if err := ls.WriteObject(obj, bytes.NewReader([]byte{}), 0, true); err != nil {
			t.Fatalf("unexpected err: %v", err)
		}
		if err := ls.DeleteObject(obj); err != nil {
			t.Fatalf("unexpected err: %v", err)
		}
	}

	// no files and directories should be left
	bd, err := os.Open(filepath.Join(dir, dataDirName))
	if err != nil {
		t.Fatalf("unexpected err: %v", err)
	}
	files, err := bd.Readdirnames(0)
	if err != nil {
		t.Fatalf("unexpected err: %v", err)
	}
	if len(files) > 0 {
		t.Fatalf("expected 0 files got %d files", len(files))
	}
}