import pytest
import aqt.operations.note
from plugin.edit import Edit, DecentPreviewer, history


def test_edit_dialog_opens(setup):
    Edit.open_dialog_and_show_note_with_id(setup.note1_id)


def test_edit_dialog_opens_only_once(setup):
    dialog1 = Edit.open_dialog_and_show_note_with_id(setup.note1_id)
    dialog2 = Edit.open_dialog_and_show_note_with_id(setup.note1_id)
    assert dialog1 is dialog2


def test_edit_dialog_fails_to_open_with_invalid_note(setup):
    with pytest.raises(Exception):
        Edit.open_dialog_and_show_note_with_id(123)


def test_browser_dialog_opens(setup):
    dialog = Edit.open_dialog_and_show_note_with_id(setup.note1_id)
    dialog.show_browser()


class TestPreviewDialog:
    def test_opens(self, setup):
        edit_dialog = Edit.open_dialog_and_show_note_with_id(setup.note1_id)
        edit_dialog.show_preview()

    @pytest.fixture
    def dialog(self, setup):
        edit_dialog = Edit.open_dialog_and_show_note_with_id(setup.note1_id)
        preview_dialog: DecentPreviewer = edit_dialog.show_preview()

        def press_next_button(times=0):
            for _ in range(times):
                preview_dialog._last_render = 0         # render without delay
                preview_dialog._on_next()

        preview_dialog.press_next_button = press_next_button

        yield preview_dialog

    @pytest.mark.parametrize(
        "next_button_presses, current_card, "
        "showing_question_only, previous_enabled, next_enabled",
        [
            pytest.param(0, 0, True, False, True,
                    id="next button pressed 0 times; first card, question"),
            pytest.param(1, 0, False, True, True,
                    id="next button pressed 1 time;  first card, answer"),
            pytest.param(2, 1, True,  True, True,
                    id="next button pressed 2 times; second card, question"),
            pytest.param(3, 1, False, True, False,
                    id="next button pressed 3 times; second card, answer"),
            pytest.param(4, 1, False, True, False,
                    id="next button pressed 4 times; second card still, answer"),
        ]
    )
    def test_navigation(self, dialog, next_button_presses, current_card,
            showing_question_only, previous_enabled, next_enabled):
        dialog.press_next_button(times=next_button_presses)
        assert dialog.adapter.current == current_card
        assert dialog.showing_question_and_can_show_answer() is showing_question_only
        assert dialog._should_enable_prev() is previous_enabled
        assert dialog._should_enable_next() is next_enabled


class TestHistory:
    @pytest.fixture(autouse=True)
    def cleanup(self):
        history.note_ids = []

    def test_single_note(self, setup):
        assert history.note_ids == []
        Edit.open_dialog_and_show_note_with_id(setup.note1_id)
        assert history.note_ids == [setup.note1_id]

    def test_two_notes(self, setup):
        Edit.open_dialog_and_show_note_with_id(setup.note1_id)
        Edit.open_dialog_and_show_note_with_id(setup.note2_id)
        assert history.note_ids == [setup.note1_id, setup.note2_id]

    def test_old_note_reopened(self, setup):
        Edit.open_dialog_and_show_note_with_id(setup.note1_id)
        Edit.open_dialog_and_show_note_with_id(setup.note2_id)
        Edit.open_dialog_and_show_note_with_id(setup.note1_id)
        assert history.note_ids == [setup.note2_id, setup.note1_id]

    def test_navigation(self, setup):
        dialog = Edit.open_dialog_and_show_note_with_id(setup.note1_id)
        Edit.open_dialog_and_show_note_with_id(setup.note2_id)

        dialog.show_previous()
        assert dialog.note.id == setup.note1_id

        dialog.show_previous()
        assert dialog.note.id == setup.note1_id

        dialog.show_next()
        assert dialog.note.id == setup.note2_id

        dialog.show_next()
        assert dialog.note.id == setup.note2_id


class TestNoteDeletionElsewhere:
    @pytest.fixture
    def delete_note(self, run_background_tasks_on_main_thread):
        """
        Yields a function that accepts a single note id and deletes the note,
        running the required hooks in sync
        """
        return (
            lambda note_id: aqt.operations.note
                .remove_notes(parent=None, note_ids=[note_id])  # noqa
                .run_in_background()
        )

    @staticmethod
    def edit_dialog_is_open():
        return aqt.dialogs._dialogs[Edit.dialog_registry_tag][1] is not None  # noqa

    @pytest.fixture
    def dialog(self, setup):
        Edit.open_dialog_and_show_note_with_id(setup.note1_id)
        yield Edit.open_dialog_and_show_note_with_id(setup.note2_id)

    def test_one_of_the_history_notes_is_deleted_and_dialog_stays(self,
            setup, dialog, delete_note):
        assert dialog.note.id == setup.note2_id

        delete_note(setup.note2_id)
        assert self.edit_dialog_is_open()
        assert dialog.note.id == setup.note1_id

    def test_all_of_the_history_notes_are_deleted_and_dialog_closes(self,
            setup, dialog, delete_note):
        delete_note(setup.note1_id)
        delete_note(setup.note2_id)
        assert not self.edit_dialog_is_open()