# Copyright (C) 2011 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

import os
import tarfile
import zipfile

from breezy import osutils, tests
from breezy.errors import UnsupportedOperation
from breezy.export import export
from breezy.tests import TestNotApplicable, features
from breezy.tests.per_tree import TestCaseWithTree


class ExportTest:
    def prepare_export(self):
        work_a = self.make_branch_and_tree("wta")
        self.build_tree_contents([("wta/file", b"a\nb\nc\nd\n"), ("wta/dir", b"")])
        work_a.add("file")
        work_a.add("dir")
        work_a.commit("add file")
        tree_a = self.workingtree_to_test_tree(work_a)
        export(tree_a, "output", self.exporter)

    def prepare_symlink_export(self):
        self.requireFeature(features.SymlinkFeature(self.test_dir))
        work_a = self.make_branch_and_tree("wta")
        os.symlink("target", "wta/link")
        work_a.add("link")
        work_a.commit("add link")
        tree_a = self.workingtree_to_test_tree(work_a)
        export(tree_a, "output", self.exporter)

    def test_export(self):
        self.prepare_export()
        names = self.get_export_names()
        self.assertIn("output/file", names)
        self.assertIn("output/dir", names)

    def test_export_symlink(self):
        self.prepare_symlink_export()
        names = self.get_export_names()
        self.assertIn("output/link", names)

    def prepare_nested_export(self, recurse_nested):
        tree = self.make_branch_and_tree("dir")
        self.build_tree(["dir/a"])
        tree.add("a")
        tree.commit("1")

        subtree = self.make_branch_and_tree("dir/subdir")

        self.build_tree(["dir/subdir/b"])
        subtree.add("b")
        subtree.commit("1a")

        try:
            tree.add_reference(subtree)
        except UnsupportedOperation:
            raise TestNotApplicable("format does not supported nested trees")
        tree.commit("2")
        export(tree, "output", self.exporter, recurse_nested=recurse_nested)

    def test_export_nested_recurse(self):
        self.prepare_nested_export(True)
        names = self.get_export_names()
        self.assertIn("output/subdir/b", names)

    def test_export_nested_nonrecurse(self):
        self.prepare_nested_export(False)
        names = self.get_export_names()
        self.assertNotIn("output/subdir/b", names)


class TestTar(ExportTest, TestCaseWithTree):
    exporter = "tar"

    def get_export_names(self):
        tf = tarfile.open("output")
        try:
            return tf.getnames()
        finally:
            tf.close()


class TestZip(ExportTest, TestCaseWithTree):
    exporter = "zip"

    def get_export_names(self):
        zf = zipfile.ZipFile("output")
        try:
            return zf.namelist()
        finally:
            zf.close()

    def test_export_symlink(self):
        self.prepare_symlink_export()
        names = self.get_export_names()
        self.assertIn("output/link.lnk", names)


class TestDir(ExportTest, TestCaseWithTree):
    exporter = "dir"

    def get_export_names(self):
        ret = []
        for dirpath, dirnames, filenames in os.walk("output"):
            for dirname in dirnames:
                ret.append(osutils.pathjoin(dirpath, dirname))
            for filename in filenames:
                ret.append(osutils.pathjoin(dirpath, filename))
        return ret
