# Created By: Virgil Dupras
# Created On: 2011-01-11
# Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
#
# This software is licensed under the "GPLv3" License as described in the "LICENSE" file,
# which should be included with this package. The terms are also available at
# http://www.gnu.org/licenses/gpl-3.0.html

from io import StringIO

from pytest import raises

from hscommon.testutil import eq_
from pathlib import Path
from hscommon.util import (
    nonone,
    tryint,
    first,
    flatten,
    dedupe,
    extract,
    allsame,
    format_time,
    format_time_decimal,
    format_size,
    multi_replace,
    delete_if_empty,
    open_if_filename,
    FileOrPath,
    iterconsume,
    escape,
    get_file_ext,
    rem_file_ext,
    pluralize,
)


def test_nonone():
    eq_("foo", nonone("foo", "bar"))
    eq_("bar", nonone(None, "bar"))


def test_tryint():
    eq_(42, tryint("42"))
    eq_(0, tryint("abc"))
    eq_(0, tryint(None))
    eq_(42, tryint(None, 42))


# --- Sequence


def test_first():
    eq_(first([3, 2, 1]), 3)
    eq_(first(i for i in [3, 2, 1] if i < 3), 2)


def test_flatten():
    eq_([1, 2, 3, 4], flatten([[1, 2], [3, 4]]))
    eq_([], flatten([]))


def test_dedupe():
    reflist = [0, 7, 1, 2, 3, 4, 4, 5, 6, 7, 1, 2, 3]
    eq_(dedupe(reflist), [0, 7, 1, 2, 3, 4, 5, 6])


def test_extract():
    wheat, shaft = extract(lambda n: n % 2 == 0, list(range(10)))
    eq_(wheat, [0, 2, 4, 6, 8])
    eq_(shaft, [1, 3, 5, 7, 9])


def test_allsame():
    assert allsame([42, 42, 42])
    assert not allsame([42, 43, 42])
    assert not allsame([43, 42, 42])
    # Works on non-sequence as well
    assert allsame(iter([42, 42, 42]))


def test_iterconsume():
    # We just want to make sure that we return *all* items and that we're not mistakenly skipping
    # one.
    eq_(list(range(2500)), list(iterconsume(list(range(2500)))))
    eq_(list(reversed(range(2500))), list(iterconsume(list(range(2500)), reverse=False)))


# --- String


def test_escape():
    eq_("f\\o\\ob\\ar", escape("foobar", "oa"))
    eq_("f*o*ob*ar", escape("foobar", "oa", "*"))
    eq_("f*o*ob*ar", escape("foobar", set("oa"), "*"))


def test_get_file_ext():
    eq_(get_file_ext("foobar"), "")
    eq_(get_file_ext("foo.bar"), "bar")
    eq_(get_file_ext("foobar."), "")
    eq_(get_file_ext(".foobar"), "foobar")


def test_rem_file_ext():
    eq_(rem_file_ext("foobar"), "foobar")
    eq_(rem_file_ext("foo.bar"), "foo")
    eq_(rem_file_ext("foobar."), "foobar")
    eq_(rem_file_ext(".foobar"), "")


def test_pluralize():
    eq_("0 song", pluralize(0, "song"))
    eq_("1 song", pluralize(1, "song"))
    eq_("2 songs", pluralize(2, "song"))
    eq_("1 song", pluralize(1.1, "song"))
    eq_("2 songs", pluralize(1.5, "song"))
    eq_("1.1 songs", pluralize(1.1, "song", 1))
    eq_("1.5 songs", pluralize(1.5, "song", 1))
    eq_("2 entries", pluralize(2, "entry", plural_word="entries"))


def test_format_time():
    eq_(format_time(0), "00:00:00")
    eq_(format_time(1), "00:00:01")
    eq_(format_time(23), "00:00:23")
    eq_(format_time(60), "00:01:00")
    eq_(format_time(101), "00:01:41")
    eq_(format_time(683), "00:11:23")
    eq_(format_time(3600), "01:00:00")
    eq_(format_time(3754), "01:02:34")
    eq_(format_time(36000), "10:00:00")
    eq_(format_time(366666), "101:51:06")
    eq_(format_time(0, with_hours=False), "00:00")
    eq_(format_time(1, with_hours=False), "00:01")
    eq_(format_time(23, with_hours=False), "00:23")
    eq_(format_time(60, with_hours=False), "01:00")
    eq_(format_time(101, with_hours=False), "01:41")
    eq_(format_time(683, with_hours=False), "11:23")
    eq_(format_time(3600, with_hours=False), "60:00")
    eq_(format_time(6036, with_hours=False), "100:36")
    eq_(format_time(60360, with_hours=False), "1006:00")


def test_format_time_decimal():
    eq_(format_time_decimal(0), "0.0 second")
    eq_(format_time_decimal(1), "1.0 second")
    eq_(format_time_decimal(23), "23.0 seconds")
    eq_(format_time_decimal(60), "1.0 minute")
    eq_(format_time_decimal(101), "1.7 minutes")
    eq_(format_time_decimal(683), "11.4 minutes")
    eq_(format_time_decimal(3600), "1.0 hour")
    eq_(format_time_decimal(6036), "1.7 hours")
    eq_(format_time_decimal(86400), "1.0 day")
    eq_(format_time_decimal(160360), "1.9 days")


def test_format_size():
    eq_(format_size(1024), "1 KB")
    eq_(format_size(1024, 2), "1.00 KB")
    eq_(format_size(1024, 0, 2), "1 MB")
    eq_(format_size(1024, 2, 2), "0.01 MB")
    eq_(format_size(1024, 3, 2), "0.001 MB")
    eq_(format_size(1024, 3, 2, False), "0.001")
    eq_(format_size(1023), "1023 B")
    eq_(format_size(1023, 0, 1), "1 KB")
    eq_(format_size(511, 0, 1), "1 KB")
    eq_(format_size(9), "9 B")
    eq_(format_size(99), "99 B")
    eq_(format_size(999), "999 B")
    eq_(format_size(9999), "10 KB")
    eq_(format_size(99999), "98 KB")
    eq_(format_size(999999), "977 KB")
    eq_(format_size(9999999), "10 MB")
    eq_(format_size(99999999), "96 MB")
    eq_(format_size(999999999), "954 MB")
    eq_(format_size(9999999999), "10 GB")
    eq_(format_size(99999999999), "94 GB")
    eq_(format_size(999999999999), "932 GB")
    eq_(format_size(9999999999999), "10 TB")
    eq_(format_size(99999999999999), "91 TB")
    eq_(format_size(999999999999999), "910 TB")
    eq_(format_size(9999999999999999), "9 PB")
    eq_(format_size(99999999999999999), "89 PB")
    eq_(format_size(999999999999999999), "889 PB")
    eq_(format_size(9999999999999999999), "9 EB")
    eq_(format_size(99999999999999999999), "87 EB")
    eq_(format_size(999999999999999999999), "868 EB")
    eq_(format_size(9999999999999999999999), "9 ZB")
    eq_(format_size(99999999999999999999999), "85 ZB")
    eq_(format_size(999999999999999999999999), "848 ZB")


def test_multi_replace():
    eq_("136", multi_replace("123456", ("2", "45")))
    eq_("1 3 6", multi_replace("123456", ("2", "45"), " "))
    eq_("1 3  6", multi_replace("123456", "245", " "))
    eq_("173896", multi_replace("123456", "245", "789"))
    eq_("173896", multi_replace("123456", "245", ("7", "8", "9")))
    eq_("17386", multi_replace("123456", ("2", "45"), "78"))
    eq_("17386", multi_replace("123456", ("2", "45"), ("7", "8")))
    with raises(ValueError):
        multi_replace("123456", ("2", "45"), ("7", "8", "9"))
    eq_("17346", multi_replace("12346", ("2", "45"), "78"))


# --- Files


class TestCaseDeleteIfEmpty:
    def test_is_empty(self, tmpdir):
        testpath = Path(str(tmpdir))
        assert delete_if_empty(testpath)
        assert not testpath.exists()

    def test_not_empty(self, tmpdir):
        testpath = Path(str(tmpdir))
        testpath.joinpath("foo").mkdir()
        assert not delete_if_empty(testpath)
        assert testpath.exists()

    def test_with_files_to_delete(self, tmpdir):
        testpath = Path(str(tmpdir))
        testpath.joinpath("foo").touch()
        testpath.joinpath("bar").touch()
        assert delete_if_empty(testpath, ["foo", "bar"])
        assert not testpath.exists()

    def test_directory_in_files_to_delete(self, tmpdir):
        testpath = Path(str(tmpdir))
        testpath.joinpath("foo").mkdir()
        assert not delete_if_empty(testpath, ["foo"])
        assert testpath.exists()

    def test_delete_files_to_delete_only_if_dir_is_empty(self, tmpdir):
        testpath = Path(str(tmpdir))
        testpath.joinpath("foo").touch()
        testpath.joinpath("bar").touch()
        assert not delete_if_empty(testpath, ["foo"])
        assert testpath.exists()
        assert testpath.joinpath("foo").exists()

    def test_doesnt_exist(self):
        # When the 'path' doesn't exist, just do nothing.
        delete_if_empty(Path("does_not_exist"))  # no crash

    def test_is_file(self, tmpdir):
        # When 'path' is a file, do nothing.
        p = Path(str(tmpdir)).joinpath("filename")
        p.touch()
        delete_if_empty(p)  # no crash

    def test_ioerror(self, tmpdir, monkeypatch):
        # if an IO error happens during the operation, ignore it.
        def do_raise(*args, **kw):
            raise OSError()

        monkeypatch.setattr(Path, "rmdir", do_raise)
        delete_if_empty(Path(str(tmpdir)))  # no crash


class TestCaseOpenIfFilename:
    FILE_NAME = "test.txt"

    def test_file_name(self, tmpdir):
        filepath = str(tmpdir.join(self.FILE_NAME))
        open(filepath, "wb").write(b"test_data")
        file, close = open_if_filename(filepath)
        assert close
        eq_(b"test_data", file.read())
        file.close()

    def test_opened_file(self):
        sio = StringIO()
        sio.write("test_data")
        sio.seek(0)
        file, close = open_if_filename(sio)
        assert not close
        eq_("test_data", file.read())

    def test_mode_is_passed_to_open(self, tmpdir):
        filepath = str(tmpdir.join(self.FILE_NAME))
        open(filepath, "w").close()
        file, close = open_if_filename(filepath, "a")
        eq_("a", file.mode)
        file.close()


class TestCaseFileOrPath:
    FILE_NAME = "test.txt"

    def test_path(self, tmpdir):
        filepath = str(tmpdir.join(self.FILE_NAME))
        open(filepath, "wb").write(b"test_data")
        with FileOrPath(filepath) as fp:
            eq_(b"test_data", fp.read())

    def test_opened_file(self):
        sio = StringIO()
        sio.write("test_data")
        sio.seek(0)
        with FileOrPath(sio) as fp:
            eq_("test_data", fp.read())

    def test_mode_is_passed_to_open(self, tmpdir):
        filepath = str(tmpdir.join(self.FILE_NAME))
        open(filepath, "w").close()
        with FileOrPath(filepath, "a") as fp:
            eq_("a", fp.mode)