#!/usr/bin/env python3
# coding=utf-8

import os
import re
from pathlib import Path
from unittest.mock import MagicMock, patch

import praw.models
import pytest

from bdfr.__main__ import setup_logging
from bdfr.configuration import Configuration
from bdfr.connector import RedditConnector
from bdfr.downloader import RedditDownloader


@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._split_args_input = RedditConnector.split_args_input
    downloader_mock.master_hash_list = {}
    return downloader_mock


@pytest.mark.parametrize(('test_ids', 'test_excluded', 'expected_len'), (
    (('aaaaaa',), (), 1),
    (('aaaaaa',), ('aaaaaa',), 0),
    ((), ('aaaaaa',), 0),
    (('aaaaaa', 'bbbbbb'), ('aaaaaa',), 1),
    (('aaaaaa', 'bbbbbb', 'cccccc'), ('aaaaaa',), 2),
))
@patch('bdfr.site_downloaders.download_factory.DownloadFactory.pull_lever')
def test_excluded_ids(
        mock_function: MagicMock,
        test_ids: tuple[str],
        test_excluded: tuple[str],
        expected_len: int,
        downloader_mock: MagicMock,
):
    downloader_mock.excluded_submission_ids = test_excluded
    mock_function.return_value = MagicMock()
    mock_function.return_value.__name__ = 'test'
    test_submissions = []
    for test_id in test_ids:
        m = MagicMock()
        m.id = test_id
        m.subreddit.display_name.return_value = 'https://www.example.com/'
        m.__class__ = praw.models.Submission
        test_submissions.append(m)
    downloader_mock.reddit_lists = [test_submissions]
    for submission in test_submissions:
        RedditDownloader._download_submission(downloader_mock, submission)
    assert mock_function.call_count == expected_len


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize('test_submission_id', (
    'm1hqw6',
))
def test_mark_hard_link(
        test_submission_id: str,
        downloader_mock: MagicMock,
        tmp_path: Path,
        reddit_instance: praw.Reddit
):
    downloader_mock.reddit_instance = reddit_instance
    downloader_mock.args.make_hard_links = True
    downloader_mock.download_directory = tmp_path
    downloader_mock.args.folder_scheme = ''
    downloader_mock.args.file_scheme = '{POSTID}'
    downloader_mock.file_name_formatter = RedditConnector.create_file_name_formatter(downloader_mock)
    submission = downloader_mock.reddit_instance.submission(id=test_submission_id)
    original = Path(tmp_path, f'{test_submission_id}.png')

    RedditDownloader._download_submission(downloader_mock, submission)
    assert original.exists()

    downloader_mock.args.file_scheme = 'test2_{POSTID}'
    downloader_mock.file_name_formatter = RedditConnector.create_file_name_formatter(downloader_mock)
    RedditDownloader._download_submission(downloader_mock, submission)
    test_file_1_stats = original.stat()
    test_file_2_inode = Path(tmp_path, f'test2_{test_submission_id}.png').stat().st_ino

    assert test_file_1_stats.st_nlink == 2
    assert test_file_1_stats.st_ino == test_file_2_inode


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize(('test_submission_id', 'test_creation_date'), (
    ('ndzz50', 1621204841.0),
))
def test_file_creation_date(
        test_submission_id: str,
        test_creation_date: float,
        downloader_mock: MagicMock,
        tmp_path: Path,
        reddit_instance: praw.Reddit
):
    downloader_mock.reddit_instance = reddit_instance
    downloader_mock.download_directory = tmp_path
    downloader_mock.args.folder_scheme = ''
    downloader_mock.args.file_scheme = '{POSTID}'
    downloader_mock.file_name_formatter = RedditConnector.create_file_name_formatter(downloader_mock)
    submission = downloader_mock.reddit_instance.submission(id=test_submission_id)

    RedditDownloader._download_submission(downloader_mock, submission)

    for file_path in Path(tmp_path).iterdir():
        file_stats = os.stat(file_path)
        assert file_stats.st_mtime == test_creation_date


def test_search_existing_files():
    results = RedditDownloader.scan_existing_files(Path('.'))
    assert len(results.keys()) != 0


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize(('test_submission_id', 'test_hash'), (
    ('m1hqw6', 'a912af8905ae468e0121e9940f797ad7'),
))
def test_download_submission_hash_exists(
        test_submission_id: str,
        test_hash: str,
        downloader_mock: MagicMock,
        reddit_instance: praw.Reddit,
        tmp_path: Path,
        capsys: pytest.CaptureFixture
):
    setup_logging(3)
    downloader_mock.reddit_instance = reddit_instance
    downloader_mock.download_filter.check_url.return_value = True
    downloader_mock.args.folder_scheme = ''
    downloader_mock.args.no_dupes = True
    downloader_mock.file_name_formatter = RedditConnector.create_file_name_formatter(downloader_mock)
    downloader_mock.download_directory = tmp_path
    downloader_mock.master_hash_list = {test_hash: None}
    submission = downloader_mock.reddit_instance.submission(id=test_submission_id)
    RedditDownloader._download_submission(downloader_mock, submission)
    folder_contents = list(tmp_path.iterdir())
    output = capsys.readouterr()
    assert len(folder_contents) == 0
    assert re.search(r'Resource hash .*? downloaded elsewhere', output.out)


@pytest.mark.online
@pytest.mark.reddit
def test_download_submission_file_exists(
        downloader_mock: MagicMock,
        reddit_instance: praw.Reddit,
        tmp_path: Path,
        capsys: pytest.CaptureFixture
):
    setup_logging(3)
    downloader_mock.reddit_instance = reddit_instance
    downloader_mock.download_filter.check_url.return_value = True
    downloader_mock.args.folder_scheme = ''
    downloader_mock.file_name_formatter = RedditConnector.create_file_name_formatter(downloader_mock)
    downloader_mock.download_directory = tmp_path
    submission = downloader_mock.reddit_instance.submission(id='m1hqw6')
    Path(tmp_path, 'Arneeman_Metagaming isn\'t always a bad thing_m1hqw6.png').touch()
    RedditDownloader._download_submission(downloader_mock, submission)
    folder_contents = list(tmp_path.iterdir())
    output = capsys.readouterr()
    assert len(folder_contents) == 1
    assert 'Arneeman_Metagaming isn\'t always a bad thing_m1hqw6.png'\
           ' from submission m1hqw6 already exists' in output.out


@pytest.mark.online
@pytest.mark.reddit
@pytest.mark.parametrize(('test_submission_id', 'expected_files_len'), (
    ('ljyy27', 4),
))
def test_download_submission(
        test_submission_id: str,
        expected_files_len: int,
        downloader_mock: MagicMock,
        reddit_instance: praw.Reddit,
        tmp_path: Path):
    downloader_mock.reddit_instance = reddit_instance
    downloader_mock.download_filter.check_url.return_value = True
    downloader_mock.args.folder_scheme = ''
    downloader_mock.file_name_formatter = RedditConnector.create_file_name_formatter(downloader_mock)
    downloader_mock.download_directory = tmp_path
    submission = downloader_mock.reddit_instance.submission(id=test_submission_id)
    RedditDownloader._download_submission(downloader_mock, submission)
    folder_contents = list(tmp_path.iterdir())
    assert len(folder_contents) == expected_files_len


@pytest.mark.parametrize('test_ignore_user', (
    'alice',
))
def test_download_ignores_user(
        test_ignore_user: str,
        mock_function: MagicMock,
        downloader_mock: MagicMock,
):
    downloader_mock.args.ignore_user = test_ignore_user
    submission = downloader_mock.reddit_instance.submission(id='m1hqw6')
    mock_function.return_value = MagicMock()
    mock_function.return_value.__name__ = 'test'
    submission.author.name = test_ignore_user
    RedditDownloader._download_submission(downloader_mock, submission)
    assert mock_function.call_count == 0