# Copyright (C) 2007 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Test that all WorkingTree's implement get_file_mtime."""

import os

from breezy import errors, transport
from breezy.tests import TestNotApplicable
from breezy.tests.per_workingtree import TestCaseWithWorkingTree
from breezy.tree import FileTimestampUnavailable


class TestGetFileMTime(TestCaseWithWorkingTree):
    """Test WorkingTree.get_file_mtime.

    These are more involved because we need to handle files which have been
    renamed, etc.
    """

    def make_basic_tree(self):
        tree = self.make_branch_and_tree("tree")
        self.build_tree(["tree/one"])
        tree.add(["one"])
        return tree

    def test_get_file_mtime_nested(self):
        tree = self.make_basic_tree()
        subtree = self.make_branch_and_tree("tree/sub")
        self.build_tree(["tree/sub/one"])
        subtree.add(["one"])
        subtree.commit("one")
        try:
            tree.add_reference(subtree)
        except errors.UnsupportedOperation:
            raise TestNotApplicable("subtrees not supported")
        tree.commit("sub")

        with tree.lock_read(), subtree.lock_read():
            self.assertEqual(
                tree.get_file_mtime("sub/one"), subtree.get_file_mtime("one")
            )
            self.assertEqual(
                tree.basis_tree().get_file_mtime("sub/one"),
                subtree.basis_tree().get_file_mtime("one"),
            )

    def test_get_file_mtime(self):
        tree = self.make_basic_tree()

        st = os.lstat("tree/one")
        with tree.lock_read():
            mtime_file_id = tree.get_file_mtime("one")
            self.assertIsInstance(mtime_file_id, (float, int))
            self.assertAlmostEqual(st.st_mtime, mtime_file_id)

    def test_after_commit(self):
        """Committing shouldn't change the mtime."""
        tree = self.make_basic_tree()

        st = os.lstat("tree/one")
        tree.commit("one")

        with tree.lock_read():
            mtime = tree.get_file_mtime("one")
            self.assertAlmostEqual(st.st_mtime, mtime)

    def test_get_renamed_time(self):
        """We should handle renamed files."""
        tree = self.make_basic_tree()

        tree.rename_one("one", "two")
        st = os.lstat("tree/two")

        with tree.lock_read():
            mtime = tree.get_file_mtime("two")
            self.assertAlmostEqual(st.st_mtime, mtime)

    def test_get_renamed_in_subdir_time(self):
        tree = self.make_branch_and_tree("tree")
        self.build_tree(["tree/d/", "tree/d/a"])
        tree.add(["d", "d/a"])
        rev_1 = tree.commit("1")

        tree.rename_one("d", "e")

        st = os.lstat("tree/e/a")
        with tree.lock_read():
            mtime = tree.get_file_mtime("e/a")
            self.assertAlmostEqual(st.st_mtime, mtime)

    def test_missing(self):
        tree = self.make_basic_tree()

        os.remove("tree/one")
        with tree.lock_read():
            self.assertRaises(transport.NoSuchFile, tree.get_file_mtime, "one")
