import urllib.parse

from datetime import datetime
from slugify import slugify  # type: ignore
from typing import Dict
from PyQt6.QtCore import QUrl  # type: ignore
from PyQt6.QtWebEngineWidgets import QWebEngineView
from PyQt6.QtWidgets import QTabWidget
from config import Config

from classes import MusicMusterSignals


class InfoTabs(QTabWidget):
    """
    Class to manage info tabs
    """

    def __init__(self, parent=None) -> None:
        super().__init__(parent)

        self.signals = MusicMusterSignals()
        self.signals.search_songfacts_signal.connect(self.open_in_songfacts)
        self.signals.search_wikipedia_signal.connect(self.open_in_wikipedia)
        # re-use the oldest one later)
        self.last_update: Dict[QWebEngineView, datetime] = {}
        self.tabtitles: Dict[int, str] = {}

        # Create one tab which (for some reason) creates flickering if
        # done later
        widget = QWebEngineView()
        widget.setZoomFactor(Config.WEB_ZOOM_FACTOR)
        self.last_update[widget] = datetime.now()
        _ = self.addTab(widget, "")

    def open_in_songfacts(self, title):
        """Search Songfacts for title"""

        slug = slugify(title, replacements=([["'", ""]]))
        url = f"https://www.songfacts.com/search/songs/{slug}"

        self.open_tab(url, title)

    def open_in_wikipedia(self, title):
        """Search Wikipedia for title"""

        str = urllib.parse.quote_plus(title)
        url = f"https://www.wikipedia.org/w/index.php?search={str}"

        self.open_tab(url, title)

    def open_tab(self, url: str, title: str) -> None:
        """
        Open passed URL. If URL currently displayed, switch to that tab.
        Create new tab if we're below the maximum
        number otherwise reuse oldest content tab.
        """

        if url in self.tabtitles.values():
            self.setCurrentIndex(
                list(self.tabtitles.keys())[list(self.tabtitles.values()).index(url)]
            )
            return

        short_title = title[: Config.INFO_TAB_TITLE_LENGTH]

        if self.count() < Config.MAX_INFO_TABS:
            # Create a new tab
            widget = QWebEngineView()
            widget.setZoomFactor(Config.WEB_ZOOM_FACTOR)
            tab_index = self.addTab(widget, short_title)

        else:
            # Reuse oldest widget
            widget = min(self.last_update, key=self.last_update.get)  # type: ignore
            tab_index = self.indexOf(widget)
            self.setTabText(tab_index, short_title)

        widget.setUrl(QUrl(url))
        self.last_update[widget] = datetime.now()
        self.tabtitles[tab_index] = url

        # Show newly updated tab
        self.setCurrentIndex(tab_index)