#!/usr/bin/env python3
# coding=utf-8
from datetime import datetime, timedelta
from pathlib import Path
from typing import Iterator
from unittest.mock import MagicMock

import praw
import praw.models
import pytest

from bdfr.configuration import Configuration
from bdfr.connector import RedditConnector, RedditTypes
from bdfr.download_filter import DownloadFilter
from bdfr.exceptions import BulkDownloaderException
from bdfr.file_name_formatter import FileNameFormatter
from bdfr.site_authenticator import SiteAuthenticator


@pytest.fixture()
def args() -> Configuration:
    args = Configuration()
    args.time_format = 'ISO'
    return args


@pytest.fixture()
def downloader_mock(args: Configuration):
    downloader_mock = MagicMock()
    downloader_mock.args = args
    downloader_mock.sanitise_subreddit_name = RedditConnector.sanitise_subreddit_name
    downloader_mock.create_filtered_listing_generator = lambda x: RedditConnector.create_filtered_listing_generator(
        downloader_mock, x)
    downloader_mock.split_args_input = RedditConnector.split_args_input
    downloader_mock.master_hash_list = {}
    return downloader_mock


def assert_all_results_are_submissions(result_limit: int, results: list[Iterator]) -> list:
    results = [sub for res in results for sub in res]
    assert all([isinstance(res, praw.models.Submission) for res in results])
    assert not any([isinstance(m, MagicMock) for m in results])
    if result_limit is not None:
        assert len(results) == result_limit
    return results


def assert_all_results_are_submissions_or_comments(result_limit: int, results: list[Iterator]) -> list:
    results = [sub for res in results for sub in res]
    assert all([isinstance(res, praw.models.Submission) or isinstance(res, praw.models.Comment) for res in results])
    assert not any([isinstance(m, MagicMock) for m in results])
    if result_limit is not None:
        assert len(results) == result_limit
    return results


def test_determine_directories(tmp_path: Path, downloader_mock: MagicMock):
    downloader_mock.args.directory = tmp_path / 'test'
    downloader_mock.config_directories.user_config_dir = tmp_path
    RedditConnector.determine_directories(downloader_mock)
    assert Path(tmp_path / 'test').exists()


@pytest.mark.parametrize(('skip_extensions', 'skip_domains'), (
    ([], []),
    (['.test'], ['test.com'],),
))
def test_create_download_filter(skip_extensions: list[str], skip_domains: list[str], downloader_mock: MagicMock):
    downloader_mock.args.skip = skip_extensions
    downloader_mock.args.skip_domain = skip_domains
    result = RedditConnector.create_download_filter(downloader_mock)

    assert isinstance(result, DownloadFilter)
    assert result.excluded_domains == skip_domains
    assert result.excluded_extensions == skip_extensions


@pytest.mark.parametrize(('test_time', 'expected'), (
    ('all', 'all'),
    ('hour', 'hour'),
    ('day', 'day'),
    ('week', 'week'),
    ('random', 'all'),
    ('', 'all'),
))
def test_create_time_filter(test_time: str, expected: str, downloader_mock: MagicMock):
    downloader_mock.args.time = test_time
    result = RedditConnector.create_time_filter(downloader_mock)

    assert isinstance(result, RedditTypes.TimeType)
    assert result.name.lower() == expected


@pytest.mark.parametrize(('test_sort', 'expected'), (
    ('', 'hot'),
    ('hot', 'hot'),
    ('controversial', 'controversial'),
    ('new', 'new'),
))
def test_create_sort_filter(test_sort: str, expected: str, downloader_mock: MagicMock):
    downloader_mock.args.sort = test_sort
    result = RedditConnector.create_sort_filter(downloader_mock)

    assert isinstance(result, RedditTypes.SortType)
    assert result.name.lower() == expected


@pytest.mark.parametrize(('test_file_scheme', 'test_folder_scheme'), (
    ('{POSTID}', '{SUBREDDIT}'),
    ('{REDDITOR}_{TITLE}_{POSTID}', '{SUBREDDIT}'),
    ('{POSTID}', 'test'),
    ('{POSTID}', ''),
    ('{POSTID}', '{SUBREDDIT}/{REDDITOR}'),
))
def test_create_file_name_formatter(test_file_scheme: str, test_folder_scheme: str, downloader_mock: MagicMock):
    downloader_mock.args.file_scheme = test_file_scheme
    downloader_mock.args.folder_scheme = test_folder_scheme
    result = RedditConnector.create_file_name_formatter(downloader_mock)

    assert isinstance(result, FileNameFormatter)
    assert result.file_format_string == test_file_scheme
    assert result.directory_format_string == test_folder_scheme.split('/')


@pytest.mark.parametrize(('test_file_scheme', 'test_folder_scheme'), (
    ('', ''),
    ('', '{SUBREDDIT}'),
    ('test', '{SUBREDDIT}'),
))
def test_create_file_name_formatter_bad(test_file_scheme: str, test_folder_scheme: str, downloader_mock: MagicMock):
    downloader_mock.args.file_scheme = test_file_scheme
    downloader_mock.args.folder_scheme = test_folder_scheme
    with pytest.raises(BulkDownloaderException):
        RedditConnector.create_file_name_formatter(downloader_mock)


def test_create_authenticator(downloader_mock: MagicMock):
    result = RedditConnector.create_authenticator(downloader_mock)
    assert isinstance(result, SiteAuthenticator)


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize('test_submission_ids', (
    ('lvpf4l',),
    ('lvpf4l', 'lvqnsn'),
    ('lvpf4l', 'lvqnsn', 'lvl9kd'),
))
def test_get_submissions_from_link(
        test_submission_ids: list[str],
        reddit_instance: praw.Reddit,
        downloader_mock: MagicMock):
    downloader_mock.args.link = test_submission_ids
    downloader_mock.reddit_instance = reddit_instance
    results = RedditConnector.get_submissions_from_link(downloader_mock)
    assert all([isinstance(sub, praw.models.Submission) for res in results for sub in res])
    assert len(results[0]) == len(test_submission_ids)


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize(('test_subreddits', 'limit', 'sort_type', 'time_filter', 'max_expected_len'), (
    (('Futurology',), 10, 'hot', 'all', 10),
    (('Futurology', 'Mindustry, Python'), 10, 'hot', 'all', 30),
    (('Futurology',), 20, 'hot', 'all', 20),
    (('Futurology', 'Python'), 10, 'hot', 'all', 20),
    (('Futurology',), 100, 'hot', 'all', 100),
    (('Futurology',), 0, 'hot', 'all', 0),
    (('Futurology',), 10, 'top', 'all', 10),
    (('Futurology',), 10, 'top', 'week', 10),
    (('Futurology',), 10, 'hot', 'week', 10),
))
def test_get_subreddit_normal(
        test_subreddits: list[str],
        limit: int,
        sort_type: str,
        time_filter: str,
        max_expected_len: int,
        downloader_mock: MagicMock,
        reddit_instance: praw.Reddit,
):
    downloader_mock.args.limit = limit
    downloader_mock.args.sort = sort_type
    downloader_mock.time_filter = RedditConnector.create_time_filter(downloader_mock)
    downloader_mock.sort_filter = RedditConnector.create_sort_filter(downloader_mock)
    downloader_mock.determine_sort_function.return_value = RedditConnector.determine_sort_function(downloader_mock)
    downloader_mock.args.subreddit = test_subreddits
    downloader_mock.reddit_instance = reddit_instance
    results = RedditConnector.get_subreddits(downloader_mock)
    test_subreddits = downloader_mock.split_args_input(test_subreddits)
    results = [sub for res1 in results for sub in res1]
    assert all([isinstance(res1, praw.models.Submission) for res1 in results])
    assert all([res.subreddit.display_name in test_subreddits for res in results])
    assert len(results) <= max_expected_len
    assert not any([isinstance(m, MagicMock) for m in results])


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize(('test_time', 'test_delta'), (
    ('hour', timedelta(hours=1)),
    ('day', timedelta(days=1)),
    ('week', timedelta(days=7)),
    ('month', timedelta(days=31)),
    ('year', timedelta(days=365)),
))
def test_get_subreddit_time_verification(
        test_time: str,
        test_delta: timedelta,
        downloader_mock: MagicMock,
        reddit_instance: praw.Reddit,
):
    downloader_mock.args.limit = 10
    downloader_mock.args.sort = 'top'
    downloader_mock.args.time = test_time
    downloader_mock.time_filter = RedditConnector.create_time_filter(downloader_mock)
    downloader_mock.sort_filter = RedditConnector.create_sort_filter(downloader_mock)
    downloader_mock.determine_sort_function.return_value = RedditConnector.determine_sort_function(downloader_mock)
    downloader_mock.args.subreddit = ['all']
    downloader_mock.reddit_instance = reddit_instance
    results = RedditConnector.get_subreddits(downloader_mock)
    results = [sub for res1 in results for sub in res1]
    assert all([isinstance(res1, praw.models.Submission) for res1 in results])
    nowtime = datetime.now()
    for r in results:
        result_time = datetime.fromtimestamp(r.created_utc)
        time_diff = nowtime - result_time
        assert time_diff < test_delta


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize(('test_subreddits', 'search_term', 'limit', 'time_filter', 'max_expected_len'), (
    (('Python',), 'scraper', 10, 'all', 10),
    (('Python',), '', 10, 'all', 0),
    (('Python',), 'djsdsgewef', 10, 'all', 0),
    (('Python',), 'scraper', 10, 'year', 10),
))
def test_get_subreddit_search(
        test_subreddits: list[str],
        search_term: str,
        time_filter: str,
        limit: int,
        max_expected_len: int,
        downloader_mock: MagicMock,
        reddit_instance: praw.Reddit,
):
    downloader_mock._determine_sort_function.return_value = praw.models.Subreddit.hot
    downloader_mock.args.limit = limit
    downloader_mock.args.search = search_term
    downloader_mock.args.subreddit = test_subreddits
    downloader_mock.reddit_instance = reddit_instance
    downloader_mock.sort_filter = RedditTypes.SortType.HOT
    downloader_mock.args.time = time_filter
    downloader_mock.time_filter = RedditConnector.create_time_filter(downloader_mock)
    results = RedditConnector.get_subreddits(downloader_mock)
    results = [sub for res in results for sub in res]
    assert all([isinstance(res, praw.models.Submission) for res in results])
    assert all([res.subreddit.display_name in test_subreddits for res in results])
    assert len(results) <= max_expected_len
    if max_expected_len != 0:
        assert len(results) > 0
    assert not any([isinstance(m, MagicMock) for m in results])


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize(('test_user', 'test_multireddits', 'limit'), (
    ('helen_darten', ('cuteanimalpics',), 10),
    ('korfor', ('chess',), 100),
))
# Good sources at https://www.reddit.com/r/multihub/
def test_get_multireddits_public(
        test_user: str,
        test_multireddits: list[str],
        limit: int,
        reddit_instance: praw.Reddit,
        downloader_mock: MagicMock,
):
    downloader_mock.determine_sort_function.return_value = praw.models.Subreddit.hot
    downloader_mock.sort_filter = RedditTypes.SortType.HOT
    downloader_mock.args.limit = limit
    downloader_mock.args.multireddit = test_multireddits
    downloader_mock.args.user = [test_user]
    downloader_mock.reddit_instance = reddit_instance
    downloader_mock.create_filtered_listing_generator.return_value = \
        RedditConnector.create_filtered_listing_generator(
            downloader_mock,
            reddit_instance.multireddit(test_user, test_multireddits[0]),
        )
    results = RedditConnector.get_multireddits(downloader_mock)
    results = [sub for res in results for sub in res]
    assert all([isinstance(res, praw.models.Submission) for res in results])
    assert len(results) == limit
    assert not any([isinstance(m, MagicMock) for m in results])


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize(('test_user', 'limit'), (
    ('danigirl3694', 10),
    ('danigirl3694', 50),
    ('CapitanHam', None),
))
def test_get_user_submissions(test_user: str, limit: int, downloader_mock: MagicMock, reddit_instance: praw.Reddit):
    downloader_mock.args.limit = limit
    downloader_mock.determine_sort_function.return_value = praw.models.Subreddit.hot
    downloader_mock.sort_filter = RedditTypes.SortType.HOT
    downloader_mock.args.submitted = True
    downloader_mock.args.user = [test_user]
    downloader_mock.authenticated = False
    downloader_mock.reddit_instance = reddit_instance
    downloader_mock.create_filtered_listing_generator.return_value = \
        RedditConnector.create_filtered_listing_generator(
            downloader_mock,
            reddit_instance.redditor(test_user).submissions,
        )
    results = RedditConnector.get_user_data(downloader_mock)
    results = assert_all_results_are_submissions(limit, results)
    assert all([res.author.name == test_user for res in results])
    assert not any([isinstance(m, MagicMock) for m in results])


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.authenticated
@pytest.mark.parametrize('test_flag', (
    'upvoted',
    'saved',
))
def test_get_user_authenticated_lists(
        test_flag: str,
        downloader_mock: MagicMock,
        authenticated_reddit_instance: praw.Reddit,
):
    downloader_mock.args.__dict__[test_flag] = True
    downloader_mock.reddit_instance = authenticated_reddit_instance
    downloader_mock.args.limit = 10
    downloader_mock.determine_sort_function.return_value = praw.models.Subreddit.hot
    downloader_mock.sort_filter = RedditTypes.SortType.HOT
    downloader_mock.args.user = [RedditConnector.resolve_user_name(downloader_mock, 'me')]
    results = RedditConnector.get_user_data(downloader_mock)
    assert_all_results_are_submissions_or_comments(10, results)


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.authenticated
def test_get_subscribed_subreddits(downloader_mock: MagicMock, authenticated_reddit_instance: praw.Reddit):
    downloader_mock.reddit_instance = authenticated_reddit_instance
    downloader_mock.args.limit = 10
    downloader_mock.args.authenticate = True
    downloader_mock.args.subscribed = True
    downloader_mock.determine_sort_function.return_value = praw.models.Subreddit.hot
    downloader_mock.determine_sort_function.return_value = praw.models.Subreddit.hot
    downloader_mock.sort_filter = RedditTypes.SortType.HOT
    results = RedditConnector.get_subreddits(downloader_mock)
    assert all([isinstance(s, praw.models.ListingGenerator) for s in results])
    assert len(results) > 0


@pytest.mark.parametrize(('test_name', 'expected'), (
    ('Mindustry', 'Mindustry'),
    ('Futurology', 'Futurology'),
    ('r/Mindustry', 'Mindustry'),
    ('TrollXChromosomes', 'TrollXChromosomes'),
    ('r/TrollXChromosomes', 'TrollXChromosomes'),
    ('https://www.reddit.com/r/TrollXChromosomes/', 'TrollXChromosomes'),
    ('https://www.reddit.com/r/TrollXChromosomes', 'TrollXChromosomes'),
    ('https://www.reddit.com/r/Futurology/', 'Futurology'),
    ('https://www.reddit.com/r/Futurology', 'Futurology'),
))
def test_sanitise_subreddit_name(test_name: str, expected: str):
    result = RedditConnector.sanitise_subreddit_name(test_name)
    assert result == expected


@pytest.mark.parametrize(('test_subreddit_entries', 'expected'), (
    (['test1', 'test2', 'test3'], {'test1', 'test2', 'test3'}),
    (['test1,test2', 'test3'], {'test1', 'test2', 'test3'}),
    (['test1, test2', 'test3'], {'test1', 'test2', 'test3'}),
    (['test1; test2', 'test3'], {'test1', 'test2', 'test3'}),
    (['test1, test2', 'test1,test2,test3', 'test4'], {'test1', 'test2', 'test3', 'test4'}),
    ([''], {''}),
    (['test'], {'test'}),
))
def test_split_subreddit_entries(test_subreddit_entries: list[str], expected: set[str]):
    results = RedditConnector.split_args_input(test_subreddit_entries)
    assert results == expected


def test_read_submission_ids_from_file(downloader_mock: MagicMock, tmp_path: Path):
    test_file = tmp_path / 'test.txt'
    test_file.write_text('aaaaaa\nbbbbbb')
    results = RedditConnector.read_id_files([str(test_file)])
    assert results == {'aaaaaa', 'bbbbbb'}


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize('test_redditor_name', (
    'nasa',
    'crowdstrike',
    'HannibalGoddamnit',
))
def test_check_user_existence_good(
        test_redditor_name: str,
        reddit_instance: praw.Reddit,
        downloader_mock: MagicMock,
):
    downloader_mock.reddit_instance = reddit_instance
    RedditConnector.check_user_existence(downloader_mock, test_redditor_name)


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize('test_redditor_name', (
    'lhnhfkuhwreolo',
    'adlkfmnhglojh',
))
def test_check_user_existence_nonexistent(
        test_redditor_name: str,
        reddit_instance: praw.Reddit,
        downloader_mock: MagicMock,
):
    downloader_mock.reddit_instance = reddit_instance
    with pytest.raises(BulkDownloaderException, match='Could not find'):
        RedditConnector.check_user_existence(downloader_mock, test_redditor_name)


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize('test_redditor_name', (
    'Bree-Boo',
))
def test_check_user_existence_banned(
        test_redditor_name: str,
        reddit_instance: praw.Reddit,
        downloader_mock: MagicMock,
):
    downloader_mock.reddit_instance = reddit_instance
    with pytest.raises(BulkDownloaderException, match='is banned'):
        RedditConnector.check_user_existence(downloader_mock, test_redditor_name)


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize(('test_subreddit_name', 'expected_message'), (
    ('donaldtrump', 'cannot be found'),
    ('submitters', 'private and cannot be scraped'),
    ('lhnhfkuhwreolo', 'does not exist')
))
def test_check_subreddit_status_bad(test_subreddit_name: str, expected_message: str, reddit_instance: praw.Reddit):
    test_subreddit = reddit_instance.subreddit(test_subreddit_name)
    with pytest.raises(BulkDownloaderException, match=expected_message):
        RedditConnector.check_subreddit_status(test_subreddit)


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize('test_subreddit_name', (
    'Python',
    'Mindustry',
    'TrollXChromosomes',
    'all',
))
def test_check_subreddit_status_good(test_subreddit_name: str, reddit_instance: praw.Reddit):
    test_subreddit = reddit_instance.subreddit(test_subreddit_name)
    RedditConnector.check_subreddit_status(test_subreddit)