from collections import OrderedDict
from itertools import chain

# noinspection PyPackageRequirements
import wx

import gui.globalEvents as GE
import gui.mainFrame
from gui.contextMenu import ContextMenuUnconditional
from gui.utils.sorter import smartSort
from service.damagePattern import DamagePattern as DmgPatternSvc
from service.fit import Fit


class ChangeDamagePattern(ContextMenuUnconditional):

    def __init__(self):
        self.mainFrame = gui.mainFrame.MainFrame.getInstance()

    def display(self, callingWindow, srcContext):
        return srcContext == "resistancesViewFull"

    @property
    def enabled(self):
        return self.mainFrame.getActiveFit() is not None

    def getText(self, callingWindow, itmContext):
        sDP = DmgPatternSvc.getInstance()
        sFit = Fit.getInstance()
        fitID = self.mainFrame.getActiveFit()
        self.fit = sFit.getFit(fitID)

        builtinPatterns = sDP.getBuiltinDamagePatternList()
        userPatterns = sorted(sDP.getUserDamagePatternList(), key=lambda p: smartSort(p.fullName))
        # Order here is important: patterns with duplicate names from the latter will overwrite
        # patterns from the former
        self.patterns = sorted(
                chain(builtinPatterns, userPatterns),
                key=lambda p: p.fullName not in ["Uniform", "Selected Ammo"])

        self.patternEventMap = {}
        self.items = (OrderedDict(), OrderedDict())
        for pattern in self.patterns:
            container = self.items
            for categoryName in pattern.hierarchy:
                container = container[1].setdefault(categoryName, (OrderedDict(), OrderedDict()))
            container[0][pattern.shortName] = pattern

        return list(self.items[0].keys()) + list(self.items[1].keys())

    def _addPattern(self, parentMenu, pattern, name):
        id = ContextMenuUnconditional.nextID()
        self.patternEventMap[id] = pattern
        menuItem = wx.MenuItem(parentMenu, id, name, kind=wx.ITEM_CHECK)
        parentMenu.Bind(wx.EVT_MENU, self.handlePatternSwitch, menuItem)

        # determine active pattern
        sFit = Fit.getInstance()
        fitID = self.mainFrame.getActiveFit()
        fit = sFit.getFit(fitID)
        checked = fit.damagePattern is pattern if fit else False
        return menuItem, checked

    def _addCategory(self, parentMenu, name):
        id = ContextMenuUnconditional.nextID()
        menuItem = wx.MenuItem(parentMenu, id, name)
        parentMenu.Bind(wx.EVT_MENU, self.handlePatternSwitch, menuItem)
        return menuItem

    def isChecked(self, i):
        try:
            patternName = list(self.items[0].keys())[i]
        except IndexError:
            return super().isChecked(i)
        pattern = self.items[0][patternName]
        if self.fit and pattern is self.fit.damagePattern:
            return True
        return False

    def getSubMenu(self, callingWindow, context, rootMenu, i, pitem):

        # Pattern as menu item
        if i < len(self.items[0]):
            id = pitem.GetId()
            self.patternEventMap[id] = list(self.items[0].values())[i]
            rootMenu.Bind(wx.EVT_MENU, self.handlePatternSwitch, pitem)
            return False

        # Category as menu item - expands further
        msw = "wxMSW" in wx.PlatformInfo

        def makeMenu(container, parentMenu):
            menu = wx.Menu()
            for name, subcontainer in container[1].items():
                menuItem = self._addCategory(rootMenu if msw else parentMenu, name)
                subMenu = makeMenu(subcontainer, menu)
                menuItem.SetSubMenu(subMenu)
                menu.Append(menuItem)
            for name, pattern in container[0].items():
                menuItem, checked = self._addPattern(rootMenu if msw else parentMenu, pattern, name)
                menu.Append(menuItem)
                menuItem.Check(checked)
            menu.Bind(wx.EVT_MENU, self.handlePatternSwitch)
            return menu

        container = list(self.items[1].values())[i - len(self.items[0])]
        subMenu = makeMenu(container, rootMenu)
        return subMenu

    def handlePatternSwitch(self, event):
        pattern = self.patternEventMap.get(event.Id, False)
        if pattern is False:
            event.Skip()
            return

        sFit = Fit.getInstance()
        fitID = self.mainFrame.getActiveFit()
        sFit.setDamagePattern(fitID, pattern)
        setattr(self.mainFrame, "_activeDmgPattern", pattern)
        wx.PostEvent(self.mainFrame, GE.FitChanged(fitIDs=(fitID,)))


ChangeDamagePattern.register()