#!/usr/bin/env python

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
# You can obtain one at http://mozilla.org/MPL/2.0/.

from __future__ import absolute_import

import os
import shutil
import tempfile
import unittest

import mozunit

from manifestparser import convert, ManifestParser


class TestSymlinkConversion(unittest.TestCase):
    """
    test conversion of a directory tree with symlinks to a manifest structure
    """

    def create_stub(self, directory=None):
        """stub out a directory with files in it"""

        files = ("foo", "bar", "fleem")
        if directory is None:
            directory = tempfile.mkdtemp()
        for i in files:
            open(os.path.join(directory, i), "w").write(i)
        subdir = os.path.join(directory, "subdir")
        os.mkdir(subdir)
        open(os.path.join(subdir, "subfile"), "w").write("baz")
        return directory

    def test_relpath(self):
        """test convert `relative_to` functionality"""

        oldcwd = os.getcwd()
        stub = self.create_stub()
        try:
            # subdir with in-memory manifest
            files = ["../bar", "../fleem", "../foo", "subfile"]
            subdir = os.path.join(stub, "subdir")
            os.chdir(subdir)
            parser = convert([stub], relative_to=".")
            self.assertEqual([i["name"] for i in parser.tests], files)
        except BaseException:
            raise
        finally:
            shutil.rmtree(stub)
            os.chdir(oldcwd)

    @unittest.skipIf(
        not hasattr(os, "symlink"), "symlinks unavailable on this platform"
    )
    def test_relpath_symlink(self):
        """
        Ensure `relative_to` works in a symlink.
        Not available on windows.
        """

        oldcwd = os.getcwd()
        workspace = tempfile.mkdtemp()
        try:
            tmpdir = os.path.join(workspace, "directory")
            os.makedirs(tmpdir)
            linkdir = os.path.join(workspace, "link")
            os.symlink(tmpdir, linkdir)
            self.create_stub(tmpdir)

            # subdir with in-memory manifest
            files = ["../bar", "../fleem", "../foo", "subfile"]
            subdir = os.path.join(linkdir, "subdir")
            os.chdir(os.path.realpath(subdir))
            for directory in (tmpdir, linkdir):
                parser = convert([directory], relative_to=".")
                self.assertEqual([i["name"] for i in parser.tests], files)
        finally:
            shutil.rmtree(workspace)
            os.chdir(oldcwd)

        # a more complicated example
        oldcwd = os.getcwd()
        workspace = tempfile.mkdtemp()
        try:
            tmpdir = os.path.join(workspace, "directory")
            os.makedirs(tmpdir)
            linkdir = os.path.join(workspace, "link")
            os.symlink(tmpdir, linkdir)
            self.create_stub(tmpdir)
            files = ["../bar", "../fleem", "../foo", "subfile"]
            subdir = os.path.join(linkdir, "subdir")
            subsubdir = os.path.join(subdir, "sub")
            os.makedirs(subsubdir)
            linksubdir = os.path.join(linkdir, "linky")
            linksubsubdir = os.path.join(subsubdir, "linky")
            os.symlink(subdir, linksubdir)
            os.symlink(subdir, linksubsubdir)
            for dest in (subdir,):
                os.chdir(dest)
                for directory in (tmpdir, linkdir):
                    parser = convert([directory], relative_to=".")
                    self.assertEqual([i["name"] for i in parser.tests], files)
        finally:
            shutil.rmtree(workspace)
            os.chdir(oldcwd)

    @unittest.skipIf(
        not hasattr(os, "symlink"), "symlinks unavailable on this platform"
    )
    def test_recursion_symlinks(self):
        workspace = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, workspace)

        # create two dirs
        os.makedirs(os.path.join(workspace, "dir1"))
        os.makedirs(os.path.join(workspace, "dir2"))

        # create cyclical symlinks
        os.symlink(os.path.join("..", "dir1"), os.path.join(workspace, "dir2", "ldir1"))
        os.symlink(os.path.join("..", "dir2"), os.path.join(workspace, "dir1", "ldir2"))

        # create one file in each dir
        open(os.path.join(workspace, "dir1", "f1.txt"), "a").close()
        open(os.path.join(workspace, "dir1", "ldir2", "f2.txt"), "a").close()

        data = []

        def callback(rootdirectory, directory, subdirs, files):
            for f in files:
                data.append(f)

        ManifestParser._walk_directories([workspace], callback)
        self.assertEqual(sorted(data), ["f1.txt", "f2.txt"])


if __name__ == "__main__":
    mozunit.main()