# -*- mode: python; coding: utf-8 -*-

import logging
import gtk

import formulator
import util


# Where the item can be
TOOLBAR, MOUSE, MENUBAR = [2**x for x in range(3)]

# What type of item is
MENUITEM, TOOLITEM, SEPARATOR = [x**2 for x in range(3)]


class ActionManager:
    "Gestiona un gtk.ActionGroup para desacoplar el inspector del UI"

    def __init__(self, ui_name):
        self.ui_name = ui_name
        self.actions = []
        self.group = gtk.ActionGroup(ui_name)
        self.locations = util.SortedDict()   # action(string):(where(flag),type(menu.TYPE))
        self.merge_ids = []
        self.desc = ''
        self.auto_desc = ''
        self.__getitem__ = self.group.get_action
        #self.__affected_cb = None
        self.uimgr = None

        self.ui_layout = None


    def __repr__(self):
        return "<ActionManager '%s'>" % self.ui_name

    def add_desc(self, desc):
        self.desc += desc

    def add_menu(self, values, desc):
        #print 'ADD_MENU', values, desc
        self.group.add_actions([values])
        self.desc += desc

    def append_action_with_desc(self, defin, arg, desc):
        #print 'ADD_ACTION_WITH_DESC', defin, desc
        self.group.add_actions([defin], arg)
        self.desc += desc

    def add_action(self, name, icon=None, label='', accel='',
                   tip=None, form=None, callback=None, location=0,
                   code=None,  arg=(), is_toggle=False, itype=None):


        def without_action(func):
            def decorated(action, *args):
                func(*args)
            return decorated

        self.locations[name] = (location, itype)
        if not label: label = name

        callback = formulator.UI_FormAction(callback, form, code)

        action_def = [(name, icon, label, accel, tip, without_action(callback))]
        if is_toggle:
            self.group.add_toggle_actions(action_def, *arg)
        else:
            self.group.add_actions(action_def, *arg)


    def add_separator(self, name, location):
        self.locations[name] = (location, SEPARATOR)


    # defs: (name, stock, label, accel, tip, callbak, location, type)
    def add_actions(self, defs, arg=None):
        block = []
        for action in defs:
            assert len(action) == 8
            name = action[0]
            self.locations[name] = (action[6],action[7])
            block.append(action[:6])

        self.group.add_actions(block, arg)
        self.auto_desc = ''


    def gen_desc(self):
        "Automatic UI descriptions"

        TOOLBAR_ITEM = '''
<toolbar action="Toolbar_%s">
  <placeholder action="local">
    <toolitem action="%s"/>
  </placeholder>
</toolbar>'''

        TOOLBAR_SEPARATOR = '''
<toolbar action="Toolbar_%s">
  <placeholder action="local">
    <separator/>
  </placeholder>
</toolbar>'''


        POPUP_ITEM = '''
<popup action="Popup_%s">
  <menuitem action="%s"/>
</popup>'''

        POPUP_SEPARATOR = '''
<popup action="Popup_%s">
  <separator/>
</popup>'''


        MENUBAR_ITEM = '''
<menubar action="Menubar">
  <menu action="Panel">
    <placeholder action="PanelActions">
      <menuitem action="%s"/>
    </placeholder>
  </menu>
</menubar>'''

        MENUBAR_SEPARATOR = '''
<menubar action="Menubar">
  <menu action="Panel">
    <placeholder action="PanelActions">
      <separator/>
    </placeholder>
  </menu>
</menubar>'''

        for name in self.locations:
            loc, itype = self.locations[name]

            if itype == SEPARATOR:
                if loc & TOOLBAR:
                    self.auto_desc += TOOLBAR_SEPARATOR % self.ui_name

                if loc & MOUSE:
                    self.auto_desc += POPUP_SEPARATOR % self.ui_name

                if loc & MENUBAR:
                    self.auto_desc += MENUBAR_SEPARATOR % self.ui_name

            else:
                if loc & TOOLBAR:
                    self.auto_desc += TOOLBAR_ITEM % (self.ui_name, name)

                if loc & MOUSE:
                    self.auto_desc += POPUP_ITEM % (self.ui_name, name)

                if loc & MENUBAR:
                    self.auto_desc += MENUBAR_ITEM % name


    def insert_ui(self, uimgr, priority=1):
        self.uimgr = uimgr
        if self.group in uimgr.get_action_groups(): return

        uimgr.insert_action_group(self.group, priority)

        if self.auto_desc == '': self.gen_desc()
        self.merge_ids.append(uimgr.add_ui_from_string(self.desc + self.auto_desc))

        uimgr.ensure_update()


    def remove_ui(self, uimgr):
        for id in self.merge_ids:
            uimgr.remove_ui(id)

        uimgr.remove_action_group(self.group)