# ============================================================
# Tab Counter - plugin for Falkon
# Copyright (C) 2020 Juraj Oravec <sgd.orava@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
# ============================================================

import Falkon

from PySide2 import QtWidgets

from tabcounter.constants import DISPLAY_TYPE
from tabcounter.i18n import i18n


class Label(QtWidgets.QLabel):
    window = None
    config = None

    allTabs = 0
    loadedTabs = 0

    def __init__(self, window, config):
        super().__init__()

        self.window = window
        self.config = config

        self.setFrameStyle(QtWidgets.QFrame.StyledPanel)

        self.updateText()

        self.window.tabWidget().changed.connect(self.updateText)
        self.window.tabWidget().tabRemoved.connect(self.updateText)
        self.config.displayTypeChanged.connect(lambda x: self.updateText())

    def id(self):
        return "tab-counter-button"

    def name(self):
        return "Tab Counter"

    def updateText(self):
        self.ubdateCounts()

        if self.config.displayType == DISPLAY_TYPE.ALL:
            self.setText("%d" % self.allTabs)
        elif self.config.displayType == DISPLAY_TYPE.LOADED:
            self.setText("%d" % self.loadedTabs)
        elif self.config.displayType == DISPLAY_TYPE.UNLOADED:
            self.setText("%d" % self.unloadedTabs())
        elif self.config.displayType == DISPLAY_TYPE.LOADED_AND_ALL:
            self.setText("%d/%d" % (self.loadedTabs, self.allTabs))
        else:
            self.setText("%d/%d" % (self.loadedTabs, self.allTabs))

    def ubdateCounts(self):
        tabs = self.window.tabWidget().allTabs()

        self.allTabs = len(tabs)
        self.loadedTabs = 0

        for tab in tabs:
            if tab.isRestored():
                self.loadedTabs += 1

    def unloadedTabs(self):
        return self.allTabs - self.loadedTabs

    def updateToolTip(self):
        windows_all = 0
        tabs_all = 0
        tabs_active = 0

        windows = Falkon.MainApplication.instance().windows()
        windows_all = len(windows)

        for window in windows:
            tabs = self.window.tabWidget().allTabs()
            tabs_all += len(tabs)

            for tab in tabs:
                if tab.isRestored():
                    tabs_active += 1

        tooltip = """<table>
        <tr><td>{tr_windows}:</td><td style='text-align:right;'>{windows}</td></tr>
        <tr><td>{tr_active}:</td><td style='text-align:right;'>{tabs_active}</td></tr>
        <tr><td>{tr_inactive}:</td><td style='text-align:right;'>{tabs_inactive}</td></tr>
        <tr><td>{tr_all}:</td><td style='text-align:right;'>{tabs_all}</td></tr>
        </table>"""

        self.setToolTip(tooltip.format(
            windows=windows_all,
            tabs_active=tabs_active,
            tabs_inactive=(tabs_all - tabs_active),
            tabs_all=tabs_all,
            tr_windows=i18n("Windows"),
            tr_active=i18n("Active"),
            tr_inactive=i18n("Inactive"),
            tr_all=i18n("All")
        ))

    def enterEvent(self, event):
        self.setToolTip("");

        if self.config.enableTooltip:
            self.updateToolTip()

        super().enterEvent(event)