from pathlib import Path
from typing import List, Iterable

import pytest

from modules.files import lib
from modules.files.models import File
from wrolpi.errors import InvalidFile
from wrolpi.media_path import MediaPathType


def test_list_files(make_files_structure, test_directory):
    files = [
        'archives/bar.txt',
        'archives/baz/bar.txt',
        'archives/baz/foo.txt',
        'archives/foo.txt',
        'empty directory/',
        'videos/other video.mp4',
        'videos/some video.mp4',
    ]
    make_files_structure(files)

    def check_list_files(path, expected):
        result = lib.list_files(path)
        result = sorted(result)
        assert [str(i.relative_to(test_directory)) for i in result] == expected

    check_list_files([], ['archives', 'empty directory', 'videos'])
    # Falsey directories are ignored.
    check_list_files([None, ''], ['archives', 'empty directory', 'videos'])
    check_list_files(['empty directory'], ['archives', 'empty directory', 'videos'])
    check_list_files(['empty directory'], ['archives', 'empty directory', 'videos'])
    # Trailing slash is ignored.
    check_list_files(['empty directory/'], ['archives', 'empty directory', 'videos'])

    check_list_files(['archives'], [
        'archives',
        'archives/bar.txt',
        'archives/baz',
        'archives/foo.txt',
        'empty directory',
        'videos',
    ])
    check_list_files(['archives/baz'], [
        'archives',
        'archives/bar.txt',
        'archives/baz',
        'archives/baz/bar.txt',
        'archives/baz/foo.txt',
        'archives/foo.txt',
        'empty directory',
        'videos',
    ])
    # Including duplicate directories does not change results.
    check_list_files(['archives/baz', 'archives'], [
        'archives',
        'archives/bar.txt',
        'archives/baz',
        'archives/baz/bar.txt',
        'archives/baz/foo.txt',
        'archives/foo.txt',
        'empty directory',
        'videos',
    ])
    check_list_files(['videos'], [
        'archives',
        'empty directory',
        'videos',
        'videos/other video.mp4',
        'videos/some video.mp4',
    ])
    # All files and directories are listed.
    check_list_files(['videos', 'archives/baz'], [
        'archives',
        'archives/bar.txt',
        'archives/baz',
        'archives/baz/bar.txt',
        'archives/baz/foo.txt',
        'archives/foo.txt',
        'empty directory',
        'videos',
        'videos/other video.mp4',
        'videos/some video.mp4',
    ])


@pytest.mark.parametrize(
    'directories,expected', [
        ([Path('foo')], [Path('foo')]),
        ([Path('foo'), Path('bar')], [Path('foo'), Path('bar')]),
        ([Path('foo'), Path('foo/bar'), Path('baz')], [Path('foo/bar'), Path('baz')]),
        ([Path('foo/bar'), Path('foo'), Path('baz')], [Path('foo/bar'), Path('baz')]),
        ([Path('baz'), Path('foo/bar'), Path('foo')], [Path('baz'), Path('foo/bar')]),
        ([Path('foo/bar'), Path('foo'), Path('foo/bar/baz')], [Path('foo/bar/baz')]),
    ]
)
def test_filter_parent_directories(directories, expected):
    assert lib.filter_parent_directories(directories) == expected


def test_delete_file(make_files_structure, test_directory):
    """
    File in the media directory can be deleted.
    """
    files = [
        'archives/foo.txt',
        'bar.txt',
        'baz/',
    ]
    make_files_structure(files)

    lib.delete_file('bar.txt')
    assert (test_directory / 'archives/foo.txt').is_file()
    assert not (test_directory / 'bar.txt').is_file()
    assert (test_directory / 'baz').is_dir()

    lib.delete_file('archives/foo.txt')
    assert not (test_directory / 'archives/foo.txt').is_file()
    assert not (test_directory / 'bar.txt').is_file()

    with pytest.raises(InvalidFile):
        lib.delete_file('baz')
    with pytest.raises(InvalidFile):
        lib.delete_file('does not exist')

    assert (test_directory / 'baz').is_dir()


@pytest.mark.parametrize(
    'path,expected',
    [
        ('foo.mp4', ['foo']),
        ('foo bar.txt', ['foo', 'bar']),
        ('foo_bar.mp4', ['foo', 'bar']),
        ('foo-bar', ['foo-bar']),
        ('123 foo bar', ['123', 'foo', 'bar']),
        ('123foo bar', ['123foo', 'bar']),
    ]
)
def test_split_file_name(path, expected):
    assert lib.split_file_name(Path(path)) == expected


def test_refresh_files(test_session, make_files_structure, test_directory):
    files = make_files_structure([
        'foo.txt',
        'bar.txt',
        'baz.txt',
    ])
    foo, bar, baz = files

    def get_relative_strs(files_: Iterable[MediaPathType]) -> List[str]:
        return sorted([str(i.path.path.relative_to(test_directory)) for i in files_])

    lib.refresh_files()
    results = test_session.query(File)
    assert get_relative_strs(results) == ['bar.txt', 'baz.txt', 'foo.txt']

    baz.unlink()

    lib.refresh_files()
    results = test_session.query(File)
    assert get_relative_strs(results) == ['bar.txt', 'foo.txt']

    foo.unlink()
    bar.unlink()

    lib.refresh_files()
    results = test_session.query(File)
    assert get_relative_strs(results) == []