# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under the
# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/

from io import BytesIO
import os.path as osp
from pathlib import Path
import subprocess

import pytest

from git.objects import Blob, Tree
from git.repo import Repo
from git.util import cwd

from test.lib import TestBase, with_rw_directory
from .lib.helper import PathLikeMock, with_rw_repo


class TestTree(TestBase):
    def test_serializable(self):
        # Tree at the given commit contains a submodule as well.
        roottree = self.rorepo.tree("6c1faef799095f3990e9970bc2cb10aa0221cf9c")
        for item in roottree.traverse(ignore_self=False):
            if item.type != Tree.type:
                continue
            # END skip non-trees
            tree = item
            # Trees have no dict.
            self.assertRaises(AttributeError, setattr, tree, "someattr", 1)

            orig_data = tree.data_stream.read()
            orig_cache = tree._cache

            stream = BytesIO()
            tree._serialize(stream)
            assert stream.getvalue() == orig_data

            stream.seek(0)
            testtree = Tree(self.rorepo, Tree.NULL_BIN_SHA, 0, "")
            testtree._deserialize(stream)
            assert testtree._cache == orig_cache

            # Replaces cache, but we make sure of it.
            del testtree._cache
            testtree._deserialize(stream)
        # END for each item in tree

    @with_rw_directory
    def _get_git_ordered_files(self, rw_dir):
        """Get files as git orders them, to compare in test_tree_modifier_ordering."""
        # Create directory contents.
        Path(rw_dir, "file").mkdir()
        for filename in (
            "bin",
            "bin.d",
            "file.to",
            "file.toml",
            "file.toml.bin",
            "file0",
        ):
            Path(rw_dir, filename).touch()
        Path(rw_dir, "file", "a").touch()

        with cwd(rw_dir):
            # Prepare the repository.
            subprocess.run(["git", "init", "-q"], check=True)
            subprocess.run(["git", "add", "."], check=True)
            subprocess.run(["git", "commit", "-m", "c1"], check=True)

            # Get git output from which an ordered file list can be parsed.
            rev_parse_command = ["git", "rev-parse", "HEAD^{tree}"]
            tree_hash = subprocess.check_output(rev_parse_command).decode().strip()
            cat_file_command = ["git", "cat-file", "-p", tree_hash]
            cat_file_output = subprocess.check_output(cat_file_command).decode()

        return [line.split()[-1] for line in cat_file_output.split("\n") if line]

    def test_tree_modifier_ordering(self):
        """TreeModifier.set_done() sorts files in the same order git does."""
        git_file_names_in_order = self._get_git_ordered_files()

        hexsha = "6c1faef799095f3990e9970bc2cb10aa0221cf9c"
        roottree = self.rorepo.tree(hexsha)
        blob_mode = Tree.blob_id