import functools
import json
import logging
import os
import platform
import subprocess
from functools import partial
from pathlib import Path
from typing import Optional, List

from PySide2 import QtCore, QtWidgets, QtGui
from PySide2.QtCore import QUrl, Signal, Qt
from qasync import asyncSlot

from randovania import VERSION
from randovania.game_description.resources.trick_resource_info import TrickResourceInfo
from randovania.games.game import RandovaniaGame
from randovania.gui.generated.main_window_ui import Ui_MainWindow
from randovania.gui.lib import common_qt_lib, async_dialog, theme
from randovania.gui.lib.trick_lib import used_tricks, difficulties_for_trick
from randovania.gui.lib.window_manager import WindowManager
from randovania.interface_common import update_checker
from randovania.interface_common.enum_lib import iterate_enum
from randovania.interface_common.options import Options
from randovania.interface_common.preset_manager import PresetManager
from randovania.layout.layout_description import LayoutDescription
from randovania.layout.trick_level import LayoutTrickLevel
from randovania.resolver import debug

_DISABLE_VALIDATION_WARNING = """
<html><head/><body>
<p>While it sometimes throws errors, the validation is what guarantees that your seed is completable.<br/>
Do <span style=" font-weight:600;">not</span> disable if you're uncomfortable with possibly unbeatable seeds.
</p><p align="center">Are you sure you want to disable validation?</p></body></html>
"""


def _update_label_on_show(label: QtWidgets.QLabel, text: str):
    def showEvent(_):
        if label._delayed_text is not None:
            label.setText(label._delayed_text)
            label._delayed_text = None

    label._delayed_text = text
    label.showEvent = showEvent


class MainWindow(WindowManager, Ui_MainWindow):
    newer_version_signal = Signal(str, str)
    options_changed_signal = Signal()
    _is_preview_mode: bool = False

    menu_new_version: Optional[QtWidgets.QAction] = None
    _current_version_url: Optional[str] = None
    _options: Options
    _data_visualizer: Optional[QtWidgets.QWidget] = None
    _map_tracker: QtWidgets.QWidget
    _preset_manager: PresetManager
    GameDetailsSignal = Signal(LayoutDescription)

    InitPostShowSignal = Signal()

    @property
    def _tab_widget(self):
        return self.main_tab_widget

    @property
    def preset_manager(self) -> PresetManager:
        return self._preset_manager

    @property
    def main_window(self) -> QtWidgets.QMainWindow:
        return self

    @property
    def is_preview_mode(self) -> bool:
        return self._is_preview_mode

    def __init__(self, options: Options, preset_manager: PresetManager,
                 network_client, preview: bool):
        super().__init__()
        self.setupUi(self)
        self.setWindowTitle("Randovania {}".format(VERSION))
        self._is_preview_mode = preview
        self.setAcceptDrops(True)
        common_qt_lib.set_default_window_icon(self)

        # Remove all hardcoded link color
        about_document: QtGui.QTextDocument = self.about_text_browser.document()
        about_document.setHtml(about_document.toHtml().replace("color:#0000ff;", ""))
        self.browse_racetime_label.setText(self.browse_racetime_label.text().replace("color:#0000ff;", ""))

        self.intro_label.setText(self.intro_label.text().format(version=VERSION))

        self._preset_manager = preset_manager
        self.network_client = network_client

        if preview:
            debug.set_level(2)

        # Signals
        self.newer_version_signal.connect(self.display_new_version)
        self.options_changed_signal.connect(self.on_options_changed)
        self.GameDetailsSignal.connect(self._open_game_details)
        self.InitPostShowSignal.connect(self.initialize_post_show)

        self.intro_play_now_button.clicked.connect(lambda: self.welcome_tab_widget.setCurrentWidget(self.tab_play))
        self.open_faq_button.clicked.connect(self._open_faq)
        self.open_database_viewer_button.clicked.connect(partial(self._open_data_visualizer_for_game,
                                                                 RandovaniaGame.PRIME2))

        for game in RandovaniaGame:
            self.hint_item_names_game_combo.addItem(game.long_name, game)
            self.hint_location_game_combo.addItem(game.long_name, game)

        self.hint_item_names_game_combo.currentIndexChanged.connect(self._update_hints_text)
        self.hint_location_game_combo.currentIndexChanged.connect(self._update_hint_locations)

        self.import_permalink_button.clicked.connect(self._import_permalink)
        self.import_game_file_button.clicked.connect(self._import_spoiler_log)
        self.browse_racetime_button.clicked.connect(self._browse_racetime)
        self.create_new_seed_button.clicked.connect(
            lambda: self.welcome_tab_widget.setCurrentWidget(self.tab_create_seed))

        # Menu Bar
        for action, game in ((self.menu_action_prime_1_data_visualizer, RandovaniaGame.PRIME1),
                             (self.menu_action_prime_2_data_visualizer, RandovaniaGame.PRIME2),
                             (self.menu_action_prime_3_data_visualizer, RandovaniaGame.PRIME3)):
            action.triggered.connect(partial(self._open_data_visualizer_for_game, game))

        for action, game in ((self.menu_action_edit_prime_1, RandovaniaGame.PRIME1),
                             (self.menu_action_edit_prime_2, RandovaniaGame.PRIME2),
                             (self.menu_action_edit_prime_3, RandovaniaGame.PRIME3)):
            action.triggered.connect(partial(self._open_data_editor_for_game, game))

        self.menu_action_item_tracker.triggered.connect(self._open_item_tracker)
        self.menu_action_map_tracker.triggered.connect(self._on_menu_action_map_tracker)
        self.menu_action_edit_existing_database.triggered.connect(self._open_data_editor_prompt)
        self.menu_action_validate_seed_after.triggered.connect(self._on_validate_seed_change)
        self.menu_action_timeout_generation_after_a_time_limit.triggered.connect(self._on_generate_time_limit_change)
        self.menu_action_dark_mode.triggered.connect(self._on_menu_action_dark_mode)
        self.menu_action_open_auto_tracker.triggered.connect(self._open_auto_tracker)
        self.menu_action_previously_generated_games.triggered.connect(self._on_menu_action_previously_generated_games)
        self.menu_action_layout_editor.triggered.connect(self._on_menu_action_layout_editor)

        self.menu_prime_1_trick_details.aboutToShow.connect(self._create_trick_details_prime_1)
        self.menu_prime_2_trick_details.aboutToShow.connect(self._create_trick_details_prime_2)
        self.menu_prime_3_trick_details.aboutToShow.connect(self._create_trick_details_prime_3)

        # Setting this event only now, so all options changed trigger only once
        options.on_options_changed = self.options_changed_signal.emit
        self._options = options

        self.main_tab_widget.setCurrentIndex(0)

    def closeEvent(self, event):
        self.generate_seed_tab.stop_background_process()
        super().closeEvent(event)

    def dragEnterEvent(self, event: QtGui.QDragEnterEvent):
        from randovania.layout.preset_migration import VersionedPreset

        valid_extensions = [
            LayoutDescription.file_extension(),
            VersionedPreset.file_extension(),
        ]
        valid_extensions_with_dot = {
            f".{extension}"
            for extension in valid_extensions
        }

        for url in event.mimeData().urls():
            ext = os.path.splitext(url.toLocalFile())[1]
            if ext in valid_extensions_with_dot:
                event.acceptProposedAction()
                return

    def dropEvent(self, event: QtGui.QDropEvent):
        from randovania.layout.preset_migration import VersionedPreset

        for url in event.mimeData().urls():
            path = Path(url.toLocalFile())
            if path.suffix == f".{LayoutDescription.file_extension()}":
                self.open_game_details(LayoutDescription.from_file(path))
                return

            elif path.suffix == f".{VersionedPreset.file_extension()}":
                self.main_tab_widget.setCurrentWidget(self.welcome_tab)
                self.welcome_tab_widget.setCurrentWidget(self.tab_create_seed)
                self.generate_seed_tab.import_preset_file(path)
                return

    def showEvent(self, event: QtGui.QShowEvent):
        self.InitPostShowSignal.emit()

    # Delayed Initialization
    @asyncSlot()
    async def initialize_post_show(self):
        self.InitPostShowSignal.disconnect(self.initialize_post_show)
        logging.info("Will initialize things in post show")
        await self._initialize_post_show_body()
        logging.info("Finished initializing post show")

    async def _initialize_post_show_body(self):
        logging.info("Will load OnlineInteractions")
        from randovania.gui.main_online_interaction import OnlineInteractions
        logging.info("Creating OnlineInteractions...")
        self.online_interactions = OnlineInteractions(self, self.preset_manager, self.network_client, self,
                                                      self._options)

        logging.info("Will load GenerateSeedTab")
        from randovania.gui.generate_seed_tab import GenerateSeedTab
        logging.info("Creating GenerateSeedTab...")
        self.generate_seed_tab = GenerateSeedTab(self, self, self._options)
        logging.info("Running GenerateSeedTab.setup_ui")
        self.generate_seed_tab.setup_ui()

        # Update hints text
        logging.info("Will _update_hints_text")
        self._update_hints_text()
        logging.info("Will hide hint locations combo")
        self.hint_location_game_combo.setVisible(False)
        self.hint_location_game_combo.setCurrentIndex(1)

        logging.info("Will update for modified options")
        with self._options:
            self.on_options_changed()

    def _update_hints_text(self):
        from randovania.gui.lib import hints_text
        hints_text.update_hints_text(self.hint_item_names_game_combo.currentData(), self.hint_item_names_tree_widget)

    def _update_hint_locations(self):
        from randovania.gui.lib import hints_text
        hints_text.update_hint_locations(self.hint_location_game_combo.currentData(), self.hint_tree_widget)

    # Generate Seed
    def _open_faq(self):
        self.main_tab_widget.setCurrentWidget(self.help_tab)
        self.help_tab_widget.setCurrentWidget(self.tab_faq)

    async def generate_seed_from_permalink(self, permalink):
        from randovania.interface_common.status_update_lib import ProgressUpdateCallable
        from randovania.gui.dialog.background_process_dialog import BackgroundProcessDialog

        def work(progress_update: ProgressUpdateCallable):
            from randovania.interface_common import simplified_patcher
            layout = simplified_patcher.generate_layout(progress_update=progress_update,
                                                        permalink=permalink,
                                                        options=self._options)
            progress_update(f"Success! (Seed hash: {layout.shareable_hash})", 1)
            return layout

        new_layout = await BackgroundProcessDialog.open_for_background_task(work, "Creating a game...")
        self.open_game_details(new_layout)

    @asyncSlot()
    async def _import_permalink(self):
        from randovania.gui.dialog.permalink_dialog import PermalinkDialog
        dialog = PermalinkDialog()
        result = await async_dialog.execute_dialog(dialog)
        if result == QtWidgets.QDialog.Accepted:
            permalink = dialog.get_permalink_from_field()
            await self.generate_seed_from_permalink(permalink)

    def _import_spoiler_log(self):
        json_path = common_qt_lib.prompt_user_for_input_game_log(self)
        if json_path is not None:
            layout = LayoutDescription.from_file(json_path)
            self.open_game_details(layout)

    @asyncSlot()
    async def _browse_racetime(self):
        from randovania.gui.dialog.racetime_browser_dialog import RacetimeBrowserDialog
        dialog = RacetimeBrowserDialog()
        if not await dialog.refresh():
            return
        result = await async_dialog.execute_dialog(dialog)
        if result == QtWidgets.QDialog.Accepted:
            await self.generate_seed_from_permalink(dialog.permalink)

    def open_game_details(self, layout: LayoutDescription):
        self.GameDetailsSignal.emit(layout)

    def _open_game_details(self, layout: LayoutDescription):
        from randovania.gui.seed_details_window import SeedDetailsWindow
        details_window = SeedDetailsWindow(self, self._options)
        details_window.update_layout_description(layout)
        details_window.show()
        self.track_window(details_window)

    # Releases info
    async def request_new_data(self):
        from randovania.interface_common import github_releases_data
        await self._on_releases_data(await github_releases_data.get_releases())

    async def _on_releases_data(self, releases: Optional[List[dict]]):
        import markdown

        current_version = update_checker.strict_current_version()
        last_changelog = self._options.last_changelog_displayed

        all_change_logs, new_change_logs, version_to_display = update_checker.versions_to_display_for_releases(
            current_version, last_changelog, releases)

        if version_to_display is not None:
            self.display_new_version(version_to_display)

        if all_change_logs:
            changelog_tab = QtWidgets.QWidget()
            changelog_tab.setObjectName("changelog_tab")
            changelog_tab_layout = QtWidgets.QVBoxLayout(changelog_tab)
            changelog_tab_layout.setContentsMargins(0, 0, 0, 0)
            changelog_tab_layout.setObjectName("changelog_tab_layout")
            changelog_scroll_area = QtWidgets.QScrollArea(changelog_tab)
            changelog_scroll_area.setWidgetResizable(True)
            changelog_scroll_area.setObjectName("changelog_scroll_area")
            changelog_scroll_contents = QtWidgets.QWidget()
            changelog_scroll_contents.setGeometry(QtCore.QRect(0, 0, 489, 337))
            changelog_scroll_contents.setObjectName("changelog_scroll_contents")
            changelog_scroll_layout = QtWidgets.QVBoxLayout(changelog_scroll_contents)
            changelog_scroll_layout.setObjectName("changelog_scroll_layout")

            for entry in all_change_logs:
                changelog_label = QtWidgets.QLabel(changelog_scroll_contents)
                _update_label_on_show(changelog_label, markdown.markdown(entry))
                changelog_label.setObjectName("changelog_label")
                changelog_label.setWordWrap(True)
                changelog_scroll_layout.addWidget(changelog_label)

            changelog_scroll_area.setWidget(changelog_scroll_contents)
            changelog_tab_layout.addWidget(changelog_scroll_area)
            self.help_tab_widget.addTab(changelog_tab, "Change Log")

        if new_change_logs:
            await async_dialog.message_box(self, QtWidgets.QMessageBox.Information,
                                           "What's new", markdown.markdown("\n".join(new_change_logs)))
            with self._options as options:
                options.last_changelog_displayed = current_version

    def display_new_version(self, version: update_checker.VersionDescription):
        if self.menu_new_version is None:
            self.menu_new_version = QtWidgets.QAction("", self)
            self.menu_new_version.triggered.connect(self.open_version_link)
            self.menu_bar.addAction(self.menu_new_version)

        self.menu_new_version.setText("New version available: {}".format(version.tag_name))
        self._current_version_url = version.html_url

    def open_version_link(self):
        if self._current_version_url is None:
            raise RuntimeError("Called open_version_link, but _current_version_url is None")

        QtGui.QDesktopServices.openUrl(QUrl(self._current_version_url))

    # Options
    def on_options_changed(self):
        self.menu_action_validate_seed_after.setChecked(self._options.advanced_validate_seed_after)
        self.menu_action_timeout_generation_after_a_time_limit.setChecked(
            self._options.advanced_timeout_during_generation)
        self.menu_action_dark_mode.setChecked(self._options.dark_mode)

        self.generate_seed_tab.on_options_changed(self._options)
        theme.set_dark_theme(self._options.dark_mode)

    # Menu Actions
    def _open_data_visualizer_for_game(self, game: RandovaniaGame):
        self.open_data_visualizer_at(None, None, game)

    def open_data_visualizer_at(self,
                                world_name: Optional[str],
                                area_name: Optional[str],
                                game: RandovaniaGame = RandovaniaGame.PRIME2,
                                ):
        from randovania.gui.data_editor import DataEditorWindow
        data_visualizer = DataEditorWindow.open_internal_data(game, False)
        self._data_visualizer = data_visualizer

        if world_name is not None:
            data_visualizer.focus_on_world(world_name)

        if area_name is not None:
            data_visualizer.focus_on_area(area_name)

        self._data_visualizer.show()

    def _open_data_editor_for_game(self, game: RandovaniaGame):
        from randovania.gui.data_editor import DataEditorWindow
        self._data_editor = DataEditorWindow.open_internal_data(game, True)
        self._data_editor.show()

    def _open_data_editor_prompt(self):
        from randovania.gui.data_editor import DataEditorWindow

        database_path = common_qt_lib.prompt_user_for_database_file(self)
        if database_path is None:
            return

        with database_path.open("r") as database_file:
            self._data_editor = DataEditorWindow(json.load(database_file), database_path, False, True)
            self._data_editor.show()

    @asyncSlot()
    async def _on_menu_action_map_tracker(self):
        dialog = QtWidgets.QInputDialog(self)
        dialog.setWindowTitle("Map Tracker")
        dialog.setLabelText("Select preset used for the tracker.")
        dialog.setComboBoxItems([preset.name for preset in self._preset_manager.all_presets])
        dialog.setTextValue(self._options.selected_preset_name)
        result = await async_dialog.execute_dialog(dialog)
        if result == QtWidgets.QDialog.Accepted:
            preset = self._preset_manager.preset_for_name(dialog.textValue())
            self.open_map_tracker(preset.get_preset().configuration)

    def open_map_tracker(self, configuration: "EchoesConfiguration"):
        from randovania.gui.tracker_window import TrackerWindow, InvalidLayoutForTracker

        try:
            self._map_tracker = TrackerWindow(self._options.tracker_files_path, configuration)
        except InvalidLayoutForTracker as e:
            QtWidgets.QMessageBox.critical(
                self,
                "Unsupported configuration for Tracker",
                str(e)
            )
            return

        self._map_tracker.show()

    def _open_item_tracker(self):
        # Importing this at root level seems to crash linux tests :(
        from PySide2.QtWebEngineWidgets import QWebEngineView

        tracker_window = QtWidgets.QMainWindow()
        tracker_window.setWindowTitle("Item Tracker")
        tracker_window.resize(370, 380)

        web_view = QWebEngineView(tracker_window)
        tracker_window.setCentralWidget(web_view)

        self.web_view = web_view

        def update_window_icon():
            tracker_window.setWindowIcon(web_view.icon())

        web_view.iconChanged.connect(update_window_icon)
        web_view.load(QUrl("https://spaghettitoastbook.github.io/echoes/tracker/"))

        tracker_window.show()
        self._item_tracker_window = tracker_window

    # Difficulties stuff

    def _exec_trick_details(self, popup: "TrickDetailsPopup"):
        self._trick_details_popup = popup
        self._trick_details_popup.setWindowModality(Qt.WindowModal)
        self._trick_details_popup.open()

    def _open_trick_details_popup(self, game, trick: TrickResourceInfo, level: LayoutTrickLevel):
        from randovania.gui.dialog.trick_details_popup import TrickDetailsPopup
        self._exec_trick_details(TrickDetailsPopup(self, self, game, trick, level))

    def _create_trick_details_prime_1(self):
        self.menu_prime_1_trick_details.aboutToShow.disconnect(self._create_trick_details_prime_1)
        self._setup_difficulties_menu(RandovaniaGame.PRIME1, self.menu_prime_1_trick_details)

    def _create_trick_details_prime_2(self):
        self.menu_prime_2_trick_details.aboutToShow.disconnect(self._create_trick_details_prime_2)
        self._setup_difficulties_menu(RandovaniaGame.PRIME2, self.menu_prime_2_trick_details)

    def _create_trick_details_prime_3(self):
        self.menu_prime_3_trick_details.aboutToShow.disconnect(self._create_trick_details_prime_3)
        self._setup_difficulties_menu(RandovaniaGame.PRIME3, self.menu_prime_3_trick_details)

    def _setup_difficulties_menu(self, game: RandovaniaGame, menu: QtWidgets.QMenu):
        from randovania.game_description import default_database
        game = default_database.game_description_for(game)
        tricks_in_use = used_tricks(game)

        menu.clear()
        for trick in sorted(game.resource_database.trick, key=lambda _trick: _trick.long_name):
            if trick not in tricks_in_use:
                continue

            trick_menu = QtWidgets.QMenu(self)
            trick_menu.setTitle(trick.long_name)
            menu.addAction(trick_menu.menuAction())

            used_difficulties = difficulties_for_trick(game, trick)
            for i, trick_level in enumerate(iterate_enum(LayoutTrickLevel)):
                if trick_level in used_difficulties:
                    difficulty_action = QtWidgets.QAction(self)
                    difficulty_action.setText(trick_level.long_name)
                    trick_menu.addAction(difficulty_action)
                    difficulty_action.triggered.connect(
                        functools.partial(self._open_trick_details_popup, game, trick, trick_level))

    # ==========

    @asyncSlot()
    async def _on_validate_seed_change(self):
        old_value = self._options.advanced_validate_seed_after
        new_value = self.menu_action_validate_seed_after.isChecked()

        if old_value and not new_value:
            box = QtWidgets.QMessageBox(self)
            box.setWindowTitle("Disable validation?")
            box.setText(_DISABLE_VALIDATION_WARNING)
            box.setIcon(QtWidgets.QMessageBox.Warning)
            box.setStandardButtons(QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No)
            box.setDefaultButton(QtWidgets.QMessageBox.No)
            user_response = await async_dialog.execute_dialog(box)
            if user_response != QtWidgets.QMessageBox.Yes:
                self.menu_action_validate_seed_after.setChecked(True)
                return

        with self._options as options:
            options.advanced_validate_seed_after = new_value

    def _on_generate_time_limit_change(self):
        is_checked = self.menu_action_timeout_generation_after_a_time_limit.isChecked()
        with self._options as options:
            options.advanced_timeout_during_generation = is_checked

    def _on_menu_action_dark_mode(self):
        with self._options as options:
            options.dark_mode = self.menu_action_dark_mode.isChecked()

    def _open_auto_tracker(self):
        from randovania.gui.auto_tracker_window import AutoTrackerWindow
        self.auto_tracker_window = AutoTrackerWindow(common_qt_lib.get_game_connection(), self._options)
        self.auto_tracker_window.show()

    def _on_menu_action_previously_generated_games(self):
        path = self._options.data_dir.joinpath("game_history")
        try:
            if platform.system() == "Windows":
                os.startfile(path)
            elif platform.system() == "Darwin":
                subprocess.run(["open", path])
            else:
                subprocess.run(["xdg-open", path])
        except OSError:
            print("Exception thrown :)")
            box = QtWidgets.QMessageBox(QtWidgets.QMessageBox.Information, "Game History",
                                        f"Previously generated games can be found at:\n{path}",
                                        QtWidgets.QMessageBox.Ok, self)
            box.setTextInteractionFlags(Qt.TextSelectableByMouse)
            box.show()

    def _on_menu_action_layout_editor(self):
        from randovania.gui.corruption_layout_editor import CorruptionLayoutEditor
        self.corruption_editor = CorruptionLayoutEditor()
        self.corruption_editor.show()
