# -*- coding: utf-8 -*-
"""
    :codeauthor: Erik Johnson <erik@saltstack.com>
"""

# Import Python libs
from __future__ import absolute_import, print_function, unicode_literals

import copy
import logging
import os
import subprocess

import salt.modules.git as git_mod  # Don't potentially shadow GitPython

# Import Salt Libs
from salt.utils.versions import LooseVersion

# Import Salt Testing Libs
from tests.support.mixins import LoaderModuleMockMixin
from tests.support.mock import MagicMock, Mock, patch
from tests.support.unit import TestCase

log = logging.getLogger(__name__)

WORKTREE_ROOT = "/tmp/salt-tests-tmpdir/main"
WORKTREE_INFO = {
    WORKTREE_ROOT: {
        "HEAD": "119f025073875a938f2456f5ffd7d04e79e5a427",
        "branch": "refs/heads/master",
        "stale": False,
    },
    "/tmp/salt-tests-tmpdir/worktree1": {
        "HEAD": "d8d19cf75d7cc3bdc598dc2d472881d26b51a6bf",
        "branch": "refs/heads/worktree1",
        "stale": False,
    },
    "/tmp/salt-tests-tmpdir/worktree2": {
        "HEAD": "56332ca504aa8b37bb62b54272d52b1d6d832629",
        "branch": "refs/heads/worktree2",
        "stale": True,
    },
    "/tmp/salt-tests-tmpdir/worktree3": {
        "HEAD": "e148ea2d521313579f661373fbb93a48a5a6d40d",
        "branch": "detached",
        "tags": ["v1.1"],
        "stale": False,
    },
    "/tmp/salt-tests-tmpdir/worktree4": {
        "HEAD": "6bbac64d3ad5582b3147088a708952df185db020",
        "branch": "detached",
        "stale": True,
    },
}


def _git_version():
    git_version = subprocess.Popen(
        ["git", "--version"],
        shell=False,
        close_fds=True,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
    ).communicate()[0]
    if not git_version:
        log.error("Git not installed")
        return False
    log.debug("Detected git version %s", git_version)
    return LooseVersion(git_version.split()[-1])


class GitTestCase(TestCase, LoaderModuleMockMixin):
    """
    Test cases for salt.modules.git
    """

    def setup_loader_modules(self):
        return {
            git_mod: {"__utils__": {"ssh.key_is_encrypted": Mock(return_value=False)}}
        }

    def test_list_worktrees(self):
        """
        This tests git.list_worktrees
        """

        def _build_worktree_output(path):
            """
            Build 'git worktree list' output for a given path
            """
            return "worktree {0}\nHEAD {1}\n{2}\n".format(
                path,
                WORKTREE_INFO[path]["HEAD"],
                "branch {0}".format(WORKTREE_INFO[path]["branch"])
                if WORKTREE_INFO[path]["branch"] != "detached"
                else "detached",
            )

        # Build dict for _cmd_run_side_effect below. Start with the output from
        # 'git worktree list'.
        _cmd_run_values = {
            "git worktree list --porcelain": "\n".join(
                [_build_worktree_output(x) for x in WORKTREE_INFO]
            ),
            "git --version": "git version 2.7.0",
        }
        # Add 'git tag --points-at' output for detached HEAD worktrees with
        # tags pointing at HEAD.
        for path in WORKTREE_INFO:
            if WORKTREE_INFO[path]["branch"] != "detached":
                continue
            key = "git tag --points-at " + WORKTREE_INFO[path]["HEAD"]
            _cmd_run_values[key] = "\n".join(WORKTREE_INFO[path].get("tags", []))

        def _cmd_run_side_effect(key, **kwargs):
            # Not using dict.get() here because we want to know if
            # _cmd_run_values doesn't account for all uses of cmd.run_all.
            return {
                "stdout": _cmd_run_values[" ".join(key)],
                "stderr": "",
                "retcode": 0,
                "pid": 12345,
            }

        def _isdir_side_effect(key):
            # os.path.isdir() would return True on a non-stale worktree
            return not WORKTREE_INFO[key].get("stale", False)

        # Build return dict for comparison
        worktree_ret = copy.deepcopy(WORKTREE_INFO)
        for key in worktree_ret:
            ptr = worktree_ret.get(key)
            ptr["detached"] = ptr["branch"] == "detached"
            ptr["branch"] = (
                None if ptr["detached"] else ptr["branch"].replace("refs/heads/", "", 1)
            )

        cmd_run_mock = MagicMock(side_effect=_cmd_run_side_effect)
        isdir_mock = MagicMock(side_effect=_isdir_side_effect)
        with patch.dict(git_mod.__salt__, {"cmd.run_all": cmd_run_mock}):
            with patch.object(os.path, "isdir", isdir_mock):
                # Test all=True. Include all return data.
                self.maxDiff = None
                self.assertEqual(
                    git_mod.list_worktrees(WORKTREE_ROOT, all=True, stale=False),
                    worktree_ret,
                )
                # Test all=False and stale=False. Exclude stale worktrees from
                # return data.
                self.assertEqual(
                    git_mod.list_worktrees(WORKTREE_ROOT, all=False, stale=False),
                    dict(
                        [
                            (x, worktree_ret[x])
                            for x in WORKTREE_INFO
                            if not WORKTREE_INFO[x].get("stale", False)
                        ]
                    ),
                )
                # Test stale=True. Exclude non-stale worktrees from return
                # data.
                self.assertEqual(
                    git_mod.list_worktrees(WORKTREE_ROOT, all=False, stale=True),
                    dict(
                        [
                            (x, worktree_ret[x])
                            for x in WORKTREE_INFO
                            if WORKTREE_INFO[x].get("stale", False)
                        ]
                    ),
                )

    def test__git_run_tmp_wrapper(self):
        """
        When an identity file is specified, make sure we don't attempt to
        remove a temp wrapper that wasn't created. Windows doesn't use temp
        wrappers, and *NIX won't unless no username was specified and the path
        is not executable.
        """
        file_remove_mock = Mock()
        mock_true = Mock(return_value=True)
        mock_false = Mock(return_value=False)
        cmd_mock = MagicMock(return_value={"retcode": 0, "stdout": "", "stderr": ""})
        with patch.dict(
            git_mod.__salt__,
            {
                "file.file_exists": mock_true,
                "file.remove": file_remove_mock,
                "cmd.run_all": cmd_mock,
                "ssh.key_is_encrypted": mock_false,
            },
        ):

            # Non-windows
            with patch("salt.utils.platform.is_windows", mock_false), patch.object(
                git_mod, "_path_is_executable_others", mock_true
            ):

                # Command doesn't really matter here since we're mocking
                git_mod._git_run(
                    ["git", "rev-parse", "HEAD"],
                    cwd="/some/path",
                    user=None,
                    identity="/root/.ssh/id_rsa",
                )

                file_remove_mock.assert_not_called()

            file_remove_mock.reset_mock()
            with patch("salt.utils.platform.is_windows", mock_true), patch.object(
                git_mod, "_find_ssh_exe", MagicMock(return_value=r"C:\Git\ssh.exe")
            ):
                # Command doesn't really matter here since we're mocking
                git_mod._git_run(
                    ["git", "rev-parse", "HEAD"],
                    cwd=r"C:\some\path",
                    user=None,
                    identity=r"C:\ssh\id_rsa",
                )

                file_remove_mock.assert_not_called()
