package filestate

import (
	"os/user"
	"path/filepath"
	"runtime"
	"testing"

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

func TestMassageBlobPath(t *testing.T) {
	testMassagePath := func(t *testing.T, s string, want string) {
		massaged, err := massageBlobPath(s)
		assert.NoError(t, err)
		assert.Equal(t, want, massaged,
			"massageBlobPath(%s) didn't return expected result.\nWant: %q\nGot:  %q", s, want, massaged)
	}

	// URLs not prefixed with "file://" are kept as-is. Also why we add FilePathPrefix as a prefix for other tests.
	t.Run("NonFilePrefixed", func(t *testing.T) {
		testMassagePath(t, "asdf-123", "asdf-123")
	})

	// The home directory is converted into the user's actual home directory.
	// Which requires even more tweaks to work on Windows.
	t.Run("PrefixedWithTilde", func(t *testing.T) {
		usr, err := user.Current()
		if err != nil {
			t.Fatalf("Unable to get current user: %v", err)
		}

		homeDir := usr.HomeDir

		// When running on Windows, the "home directory" takes on a different meaning.
		if runtime.GOOS == "windows" {
			t.Logf("Running on %v", runtime.GOOS)

			t.Run("NormalizeDirSeparator", func(t *testing.T) {
				testMassagePath(t, FilePathPrefix+`C:\Users\steve\`, FilePathPrefix+"/C:/Users/steve")
			})

			newHomeDir := "/" + filepath.ToSlash(homeDir)
			t.Logf("Changed homeDir to expect from %q to %q", homeDir, newHomeDir)
			homeDir = newHomeDir
		}

		testMassagePath(t, FilePathPrefix+"~", FilePathPrefix+homeDir)
		testMassagePath(t, FilePathPrefix+"~/alpha/beta", FilePathPrefix+homeDir+"/alpha/beta")
	})

	t.Run("MakeAbsolute", func(t *testing.T) {
		// Run the expected result through filepath.Abs, since on Windows we expect "C:\1\2".
		expected := "/1/2"
		abs, err := filepath.Abs(expected)
		assert.NoError(t, err)

		expected = filepath.ToSlash(abs)
		if expected[0] != '/' {
			expected = "/" + expected // A leading slash is added on Windows.
		}

		testMassagePath(t, FilePathPrefix+"/1/2/3/../4/..", FilePathPrefix+expected)
	})
}
