"""
Tests are named 'test_nnn_xxxx' where 'nn n' is a number. This is used to ensure that
the tests run in order as we rely (in some cases) upon the results of an earlier test.
Yes, we shouldn't do that.
"""

# Standard library imports
import os
import shutil
import tempfile
import unittest
from unittest.mock import MagicMock, patch

# PyQt imports
from PyQt6.QtWidgets import QDialog

# Third party imports
import pytest
from pytestqt.plugin import QtBot  # type: ignore

# App imports
from app import musicmuster
from app.models import (
    db,
    Playlists,
    Tracks,
)
from config import Config
from file_importer import FileImporter


# Custom fixture to adapt qtbot for use with unittest.TestCase
@pytest.fixture(scope="class")
def qtbot_adapter(qapp, request):
    """Adapt qtbot fixture for usefixtures and unittest.TestCase"""
    request.cls.qtbot = QtBot(request)


@pytest.mark.usefixtures("qtbot_adapter")
class MyTestCase(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        """Runs once before any test in this class"""

        db.create_all()

        cls.widget = musicmuster.Window()

        # Create a playlist for all tests
        playlist_name = "file importer playlist"
        with db.Session() as session:
            playlist = Playlists(session, playlist_name)
            cls.widget.create_playlist_tab(playlist)

        # Create our musicstore
        cls.import_source = tempfile.mkdtemp(suffix="_MMsource_pytest", dir="/tmp")
        Config.REPLACE_FILES_DEFAULT_SOURCE = cls.import_source
        cls.musicstore = tempfile.mkdtemp(suffix="_MMstore_pytest", dir="/tmp")
        Config.IMPORT_DESTINATION = cls.musicstore

    @classmethod
    def tearDownClass(cls):
        """Runs once after all tests"""

        db.drop_all()
        shutil.rmtree(cls.musicstore)
        shutil.rmtree(cls.import_source)

    def setUp(self):
        """Runs before each test"""

        with self.qtbot.waitExposed(self.widget):
            self.widget.show()

    def tearDown(self):
        """Runs after each test"""
        self.widget.close()  # Close UI to prevent side effects

    def test_001_import_no_files(self):
        """Try importing with no files to import"""

        with patch("file_importer.show_OK") as mock_show_ok:
            self.widget.import_files_wrapper()
            mock_show_ok.assert_called_once_with(
                "File import",
                f"No files in {Config.REPLACE_FILES_DEFAULT_SOURCE} to import",
                None,
            )

    def test_002_import_file_and_cancel(self):
        """Cancel file import"""

        test_track_path = "testdata/isa.mp3"
        shutil.copy(test_track_path, self.import_source)

        with (
            patch("file_importer.PickMatch") as MockPickMatch,
            patch("file_importer.show_OK") as mock_show_ok,
        ):
            # Create a mock instance of PickMatch
            mock_dialog_instance = MagicMock()
            MockPickMatch.return_value = mock_dialog_instance

            # Simulate the user clicking OK in the dialog
            mock_dialog_instance.exec.return_value = QDialog.DialogCode.Rejected
            mock_dialog_instance.selected_track_id = -1  # Simulated return value

            self.widget.import_files_wrapper()

            # Ensure PickMatch was instantiated correctly
            MockPickMatch.assert_called_once_with(
                new_track_description="I'm So Afraid (Fleetwood Mac)",
                choices=[("Do not import", -1, ""), ("Import as new track", 0, "")],
                default=1,
            )

            # Verify exec() was called
            mock_dialog_instance.exec.assert_called_once()

            # Ensure selected_track_id was accessed after dialog.exec()
            assert mock_dialog_instance.selected_track_id < 0

            mock_show_ok.assert_called_once_with(
                "File not imported",
                "isa.mp3 will not be imported because you asked not to import this file",
            )

    def test_003_import_first_file(self):
        """Import file into empty directory"""

        test_track_path = "testdata/isa.mp3"
        shutil.copy(test_track_path, self.import_source)

        with patch("file_importer.PickMatch") as MockPickMatch:
            # Create a mock instance of PickMatch
            mock_dialog_instance = MagicMock()
            MockPickMatch.return_value = mock_dialog_instance

            # Simulate the user clicking OK in the dialog
            mock_dialog_instance.exec.return_value = QDialog.DialogCode.Accepted
            mock_dialog_instance.selected_track_id = 0  # Simulated return value

            self.widget.import_files_wrapper()

            # Ensure PickMatch was instantiated correctly
            MockPickMatch.assert_called_once_with(
                new_track_description="I'm So Afraid (Fleetwood Mac)",
                choices=[("Do not import", -1, ""), ("Import as new track", 0, "")],
                default=1,
            )

            # Verify exec() was called
            mock_dialog_instance.exec.assert_called_once()

            # Ensure selected_track_id was accessed after dialog.exec()
            assert mock_dialog_instance.selected_track_id == 0

        # Wait until workers have run to completion
        # self.qtbot.wait(3000)
        def workers_empty():
            assert FileImporter.workers == {}

        self.qtbot.waitUntil(workers_empty, timeout=10000)

        # Check track was imported
        with db.Session() as session:
            tracks = Tracks.get_all(session)
            assert len(tracks) == 1
            track = tracks[0]
            assert track.title == "I'm So Afraid"
            assert track.artist == "Fleetwood Mac"
            track_file = os.path.join(
                self.musicstore, os.path.basename(test_track_path)
            )
            assert track.path == track_file
            assert os.path.exists(track_file)
            assert os.listdir(self.import_source) == []

    def test_004_import_second_file(self):
        """Import a second file"""

        test_track_path = "testdata/lovecats.mp3"
        shutil.copy(test_track_path, self.import_source)

        with patch("file_importer.PickMatch") as MockPickMatch:
            # Create a mock instance of PickMatch
            mock_dialog_instance = MagicMock()
            MockPickMatch.return_value = mock_dialog_instance

            # Simulate the user clicking OK in the dialog
            mock_dialog_instance.exec.return_value = QDialog.DialogCode.Accepted
            mock_dialog_instance.selected_track_id = 0  # Simulated return value

            self.widget.import_files_wrapper()

            # Ensure PickMatch was instantiated correctly
            MockPickMatch.assert_called_once_with(
                new_track_description="The Lovecats (The Cure)",
                choices=[("Do not import", -1, ""), ("Import as new track", 0, "")],
                default=1,
            )

            # Verify exec() was called
            mock_dialog_instance.exec.assert_called_once()

            # Ensure selected_track_id was accessed after dialog.exec()
            assert mock_dialog_instance.selected_track_id == 0

        # Allow time for import thread to run
        self.qtbot.wait(3000)

        # Check track was imported
        with db.Session() as session:
            tracks = Tracks.get_all(session)
            assert len(tracks) == 2
            track = tracks[1]
            assert track.title == "The Lovecats"
            assert track.artist == "The Cure"
            track_file = os.path.join(
                self.musicstore, os.path.basename(test_track_path)
            )
            assert track.path == track_file
            assert os.path.exists(track_file)
            assert os.listdir(self.import_source) == []

    def test_005_replace_file(self):
        """Import the same file again"""

        test_track_path = "testdata/lovecats.mp3"
        shutil.copy(test_track_path, self.import_source)

        with patch("file_importer.PickMatch") as MockPickMatch:
            # Create a mock instance of PickMatch
            mock_dialog_instance = MagicMock()
            MockPickMatch.return_value = mock_dialog_instance

            # Simulate the user clicking OK in the dialog
            mock_dialog_instance.exec.return_value = QDialog.DialogCode.Accepted
            mock_dialog_instance.selected_track_id = 1  # Simulated return value

            self.widget.import_files_wrapper()

            # Ensure PickMatch was instantiated correctly
            MockPickMatch.assert_called_once_with(
                new_track_description="The Lovecats (The Cure)",
                choices=[("Do not import", -1, ""),
                         ("Import as new track", 0, ""),
                         ("The Lovecats (The Cure) (100%)", 2,
                          os.path.join(self.musicstore, os.path.basename(test_track_path))
                          ),
                         ],
                default=2,
            )

            # Verify exec() was called
            mock_dialog_instance.exec.assert_called_once()

            # Ensure selected_track_id was accessed after dialog.exec()
            assert mock_dialog_instance.selected_track_id == 1

        # Allow time for import thread to run
        self.qtbot.wait(3000)

        # Check track was imported
        with db.Session() as session:
            tracks = Tracks.get_all(session)
            assert len(tracks) == 2
            track = tracks[1]
            assert track.title == "The Lovecats"
            assert track.artist == "The Cure"
            track_file = os.path.join(
                self.musicstore, os.path.basename(test_track_path)
            )
            assert track.path == track_file
            assert os.path.exists(track_file)
            assert os.listdir(self.import_source) == []

    # def test_import_replace_file
    # def test_import_similar_file
    # def test_import_new_file_existing_destination
    # def test_import_file_and_cancel
    # def test_import_file_no_tags
    # def test_import_unreadable_file