#! /usr/bin/env python
# -*- coding: utf-8 -*-

# Copyright (C) 2015 Deepin Technology Co., Ltd.
#
# 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.

import json
from PyQt5.QtCore import QObject, pyqtSlot, pyqtSignal
from PyQt5.QtDBus import QDBusReply
from DBusInterfaces import MenuManagerInterface, MenuObjectInterface

def parseMenuItem(menuItem):
    assert len(menuItem) >= 2
    result = MenuItem(menuItem[0], menuItem[1])
    if len(menuItem) > 2:
        result.setIcons(menuItem[2])
    if len(menuItem) > 3:
        result.setSubMenu(parseMenu(Menu(is_root=False), menuItem[3]))
    if len(menuItem) > 4:
        result.extra = menuItem[4]
    return result

def parseMenu(obj, menu):
    result = obj
    for menuItem in menu:
        if menuItem == None:
            result.addMenuItem(MenuSeparator())
        elif isinstance(menuItem, MenuItem):
            result.addMenuItem(menuItem)
        else:
            result.addMenuItem(parseMenuItem(menuItem))
    return result

def validateItemGroupInfo(item, groupId, groupType):
    info = item.id.split(":")
    item.id = "%s:%s:%s" % (groupId, groupType, info[-1])

class MenuItem(QObject):
    def __init__(self, id, text, icons=None, subMenu=None,
                 isActive=True, isCheckable=False, checked=False, showCheckmark=True, extra=""):
        super(MenuItem, self).__init__()
        self.id = id
        self.text = text
        self.extra = extra
        self.icons = icons or ()
        self.subMenu = subMenu or Menu(is_root=False)
        self.isActive = isActive
        self.isCheckable = isCheckable
        self.checked = checked
        self.showCheckmark = self.isCheckable and showCheckmark

    @property
    def serializableContent(self):
        iconNormal = ""
        iconHover = ""
        iconInactive = ""

        if len(self.icons) > 0:
            iconNormal = self.icons[0]
            iconHover = self.icons[0]
            iconInactive = self.icons[0]
        if len(self.icons) > 1:
            iconHover = self.icons[1]
        if len(self.icons) > 2:
            iconInactive = self.icons[2]

        return {"itemId": self.id,
                "itemIcon": iconNormal,
                "itemIconHover": iconHover,
                "itemIconInactive": iconInactive,
                "itemText": self.text,
                "itemExtra": self.extra,
                "itemSubMenu": self.subMenu.serializableItemList,
                "isActive": self.isActive,
                "isCheckable": self.isCheckable,
                "checked": self.checked,
                "showCheckmark": self.showCheckmark}

    def setSubMenu(self, menu):
        self.subMenu = menu

    def setIcons(self, icons):
        self.icons = icons

    @property
    def hasSubMenu(self):
        return len(self.subMenu.items) != 0

    def __str__(self):
        return json.dumps(self.serializableContent)

class CheckableMenuItem(MenuItem):
    def __init__(self, id, text, checked=False, showCheckmark=True, extra=""):
        super(CheckableMenuItem, self).__init__(id, text, isCheckable=True,
                                                checked=checked, showCheckmark=showCheckmark, extra=extra)

class MenuSeparator(MenuItem):
    def __init__(self):
        super(MenuSeparator, self).__init__("", "", isActive=False)

class Menu(QObject):
    itemClicked = pyqtSignal(str, bool)
    menuDismissed = pyqtSignal()

    def __init__(self, items=None, is_root=True, checkableMenu=False,
        singleCheck=False):
        super(Menu, self).__init__()
        self.items = []
        if items:
            parseMenu(self, items)
        if is_root:
            self.managerIface = MenuManagerInterface()
        self.menuIface = None
        self.checkableMenu = checkableMenu
        self.singleCheck = singleCheck

    @property
    def serializableItemList(self):
        items= []
        for item in self.items:
            items.append(item.serializableContent)
        return {"items": items,
                "checkableMenu": self.checkableMenu,
                "singleCheck": self.singleCheck}

    def addMenuItem(self, item):
        self.items.append(item)

    def addMenuItems(self, items):
        for item in items:
            self.addMenuItem(item)

    def getItemById(self, id):
        for item in self.items:
            if item.hasSubMenu:
                if item.subMenu.getItemById(id):
                    return item.subMenu.getItemById(id)
            if item.id == id:
                return item
        return None

    def setItemActivity(self, id, value):
        item = self.getItemById(id)
        if item:
            item.isActive = value
            if self.menuIface:
                self.menuIface.setItemActivity(id, value)

    def setItemText(self, id, value):
        item = self.getItemById(id)
        if item:
            item.text = value
            if self.menuIface:
                self.menuIface.setItemText(id, value)

    def showRectMenu(self, x, y):
        msg = self.managerIface.registerMenu()
        reply = QDBusReply(msg)
        self.menuIface = MenuObjectInterface(reply.value())
        self.menuIface.showMenu(json.dumps({"x": x,
                                            "y": y,
                                            "isDockMenu": False,
                                            "menuJsonContent": str(self)}))
        self.menuIface.ItemInvoked.connect(self.itemInvokedSlot)
        self.menuIface.MenuUnregistered.connect(self.menuUnregisteredSlot)

    def showDockMenu(self, x, y, cornerDirection="down"):
        msg = self.managerIface.registerMenu()
        reply = QDBusReply(msg)
        self.menuIface = MenuObjectInterface(reply.value())
        self.menuIface.showMenu(json.dumps({"x": x,
                                            "y": y,
                                            "isDockMenu": True,
                                            "cornerDirection": cornerDirection,
                                            "menuJsonContent": str(self)}))
        self.menuIface.ItemInvoked.connect(self.itemInvokedSlot)
        self.menuIface.MenuUnregistered.connect(self.menuUnregisteredSlot)

    @pyqtSlot(str, bool)
    def itemInvokedSlot(self, itemId, checked):
        self.itemClicked.emit(itemId, checked)

    @pyqtSlot()
    def menuUnregisteredSlot(self):
        self.menuDismissed.emit()

    def __str__(self):
        return json.dumps(self.serializableItemList)

class CheckboxMenu(Menu):
    def __init__(self, groupId, items):
        self.groupId = groupId
        super(CheckboxMenu, self).__init__(items, checkableMenu=True,
            singleCheck=False)

    def addMenuItem(self, item):
        validateItemGroupInfo(item, self.groupId, "checkbox")
        item.isCheckable = True
        item.showCheckmark = True
        self.items.append(item)

class RadioButtonMenu(Menu):
    def __init__(self, groupId, items):
        self.groupId = groupId
        super(RadioButtonMenu, self).__init__(items, checkableMenu=True,
            singleCheck=True)

    def addMenuItem(self, item):
        validateItemGroupInfo(item, self.groupId, "radio")
        item.isCheckable = True
        item.showCheckmark = True
        self.items.append(item)

if __name__ == "__main__":
    import sys
    from PyQt5.QtCore import QCoreApplication

    app = QCoreApplication([])

    @pyqtSlot(str, bool)
    def invoked(s, c):
        print "id: ", s, ", checked: ", c
        # menu.setItemText("id_nonactive", "hello")
        # menu.setItemActivity("id_nonactive", True)

    @pyqtSlot()
    def dismissed():
        print "dismissed"

    # 1)
    # driver = MenuItem("id_driver", "Driver", "/usr/share/icons/Deepin/apps/16/preferences-driver.png")
    # display = MenuItem("id_display", "Display", "/usr/share/icons/Deepin/apps/16/preferences-display.png")
    # show = Menu()
    # show.addMenuItem(MenuItem("id_sub_display", "Display", "/usr/share/icons/Deepin/apps/16/preferences-display.png"))
    # display.setSubMenu(show)
    # menu = Menu(is_root=True)
    # menu.addMenuItems([driver, display])
    # menu.showMenu(200, 200)

    # 2)
    menu = Menu([("id_driver", "Driver", ("/usr/share/icons/Deepin/apps/16/preferences-display.png",)),
                 None,
                 ("id_display", "_Display", (), [("display_sub1", "Display One"), ("display_sub2", "Display Two"),]),
                 ("id_radio", "RadioButtonMenu"),
                 ("id_checkbox", "_CheckBoxMenu"),
                 ("id_extra", "_ExtraTest", (), [], "Ctrl-X"),
                 MenuSeparator(),
                 CheckableMenuItem("radio_group_2:radio:radio2_sub1", "One"),
                 CheckableMenuItem("radio_group_2:radio:radio2_sub2", "Two"),
                 None,
                 CheckableMenuItem("checkbox_group_2:checkbox:checkbox2_sub1", "One"),
                 CheckableMenuItem("checkbox_group_2:checkbox:checkbox2_sub2", "Two"),
                 None,
                 MenuItem("id_nonactive", "NotActive", isActive=False),
                 CheckableMenuItem("id_check", "CheckMe", True)], is_root=True,)
    radio_sub = RadioButtonMenu("radio_group_1", [("id_radio1", "Radio One"), ("id_radio2", "Radio Two"),])
    checkbox_sub = CheckboxMenu("checkbox_group_1", [("id_checkbox1", "Checkbox One"), ("id_checkbox2", "Checkbox Two")])
    menu.getItemById("id_radio").setSubMenu(radio_sub)
    menu.getItemById("id_checkbox").setSubMenu(checkbox_sub)
    # menu.getItemById("id_radio2").showCheckmark = False
    menu.itemClicked.connect(invoked)
    menu.menuDismissed.connect(dismissed)
    menu.showRectMenu(300, 300)
    #menu.showDockMenu(1366, 768)

    sys.exit(app.exec_())