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

"""
Libervia: a Salut à Toi frontend
Copyright (C) 2011  Jérôme Poisson (goffi@goffi.org)

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""

import pyjd # this is dummy in pyjs
from pyjamas.ui.SimplePanel import SimplePanel
from pyjamas.ui.VerticalPanel import VerticalPanel
from pyjamas.ui.HorizontalPanel import HorizontalPanel
from pyjamas.ui.ScrollPanel import ScrollPanel
from pyjamas.ui.HTMLPanel import HTMLPanel
from pyjamas.ui.Grid import Grid
from pyjamas.ui.MenuBar import MenuBar
from pyjamas.ui.MenuItem import MenuItem
from pyjamas.ui.Label import Label
from pyjamas.ui.DropWidget import DropWidget
from pyjamas.ui.ClickListener import ClickHandler
from pyjamas.ui import HasAlignment
from pyjamas import Window
from pyjamas import DOM

from pyjamas.dnd import makeDraggable
from pyjamas.ui.DragWidget import DragWidget, DragContainer
from jid import JID
from datetime import datetime
from time import time

class MenuCmd:

    def __init__(self, object, handler):
        self._object  = object
        self._handler = handler

    def execute(self):
        handler = getattr(self._object, self._handler)
        handler()

class Menu(SimplePanel):

    def __init__(self):
        SimplePanel.__init__(self)

        menu_general = MenuBar(vertical=True)
        menu_general.addItem("Properties", MenuCmd(self, "onProperties"))

        menu_games = MenuBar(vertical=True)
        menu_games.addItem("Tarot", MenuCmd(self, "onTarotGame"))
        menu_games.addItem("Xiangqi", MenuCmd(self, "onXiangqiGame"))

        menubar = MenuBar(vertical=False)
        menubar.addItem(MenuItem("General", menu_general))
        menubar.addItem(MenuItem("Games", True, menu_games))
        self.add(menubar)

    def onProperties(self):
        Window.alert("Properties selected")

    def onTarotGame(self):
        Window.alert("Tarot selected")

    def onXiangqiGame(self):
        Window.alert("Xiangqi selected")

class DropCell(DropWidget):
    """Cell in the middle grid which replace itself with the dropped widget on DnD"""
    
    def __init__(self):
        DropWidget.__init__(self)
    
    def onDragEnter(self, event):
        print "drag enter"
        self.addStyleName('dragover')
        DOM.eventPreventDefault(event)

    def onDragLeave(self, event):
        print "drag leave"
        self.removeStyleName('dragover')

    def onDragOver(self, event):
        DOM.eventPreventDefault(event)

    def _getCellAndRow(self, grid, event):
        """Return cell and row index where the event is occuring"""
        cell = grid.getEventTargetCell(event)
        row = DOM.getParent(cell)
        return (row.rowIndex, cell.cellIndex)


    def onDrop(self, event):
        print "Empty Panel: onDrop"
        dt = event.dataTransfer
        #'text', 'text/plain', and 'Text' are equivalent.
        try:
            item = dt.getData("text/plain")
            item_type = dt.getData("type")
            print "message: %s" % item
            print "type: %s" % item_type
        except:
            print "no message found"
            item='&nbsp;'
            item_type = None
        DOM.eventPreventDefault(event)
        if item_type=="GROUP":
            _new_panel = MicroblogPanel(self.host, item)
            _new_panel.setAcceptedGroup(item)
        elif item_type=="CONTACT":
            _contact = JID(item)
            _new_panel = ChatPanel(self.host, _contact)
            _new_panel.historyPrint()
        elif item_type=="CONTACT_TITLE":
            _new_panel = MicroblogPanel(self.host, accept_all=True)
        self.host.mpanels.remove(self)
        self.host.mpanels.append(_new_panel)
        grid = self.getParent()
        row_idx, cell_idx = self._getCellAndRow(grid, event)
        self.removeFromParent()
        if self.host.selected == self:
            self.host.select(None)
        grid.setWidget(row_idx, cell_idx, _new_panel)
        #FIXME: delete object ? Check the right way with pyjamas

class EmptyPanel(DropCell, SimplePanel):
    """Empty dropable panel"""

    def __init__(self, host):
        SimplePanel.__init__(self)
        self.host = host
        _panel = HTMLPanel("&nbsp;")
        self.add(_panel)
        self.setHeight('100%')
        DropCell.__init__(self)
    
class MicroblogEntry(SimplePanel):

    def __init__(self, body, author, timestamp):
        SimplePanel.__init__(self)

        _datetime = datetime.fromtimestamp(timestamp)

        panel = HTMLPanel("<div class='mb_entry_header'><span class='mb_entry_author'>%(author)s</span> on <span class='mb_entry_timestamp'>%(timestamp)s</span></div><div class='mb_entry_body'>%(body)s</div>" %
            {"author": author,
            "timestamp": _datetime,
            "body": body}
            )
        panel.setStyleName('microblogEntry')
        self.add(panel)

class MicroblogPanel(DropCell, ScrollPanel):

    def __init__(self,host, title='&nbsp;', accept_all=False):
        """Panel used to show microblog
        @param title: title of the panel
        @param accept_all: if true, show every message, without filtering jids"""
        self.host = host
        self.accept_all = accept_all
        title=title.replace('<','&lt;').replace('>','&gt;')
        self.accepted_groups = []
        _class = ['mb_panel_header']
        if title == '&nbsp;':
            _class.append('empty_header')
        ScrollPanel.__init__(self)
        self.vpanel = VerticalPanel()
        self.vpanel.add(HTMLPanel("<div class='%s'>%s</div>" % (','.join(_class),title)))
        self.vpanel.setWidth('100%')
        self.setHeight('100%')
        self.setStyleName('microblogPanel')
        self.add(self.vpanel)
        DropCell.__init__(self)

    def addEntry(self, text, author=None, timestamp=None):
        """Add an entry to the panel
        @param text: main text of the entry
        @param author: who wrote the entry
        @param date: when the entry was written"""
        _entry = MicroblogEntry(text, author, timestamp)
        self.vpanel.insert(_entry,1)

    def setAcceptedGroup(self, group):
        """Set the group which can be displayed in this panel
        @param group: string of the group, or list of string
        """
        if isinstance(group, list):
            self.accepted_groups.extend(group)
        else:
            self.accepted_groups.append(group)

    def isJidAccepted(self, jid):
        """Tell if a jid is actepted and show in this panel
        @param jid: jid
        @return: True if the jid is accepted"""
        if self.accept_all:
            return True
        for group in self.accepted_groups:
            if self.host.contactPanel.isContactInGroup(group, jid):
                return True
        return False

class StatusPanel(HTMLPanel, ClickHandler):
    def __init__(self, host, status=''):
        self.host = host
        self.status = status or '&nbsp;'
        HTMLPanel.__init__(self, self.__getContent())
        self.setStyleName('statusPanel')
        ClickHandler.__init__(self)
        self.addClickListener(self)

    def __getContent(self):
        return "<span class='status'>%(status)s</span>" % {'status':self.status}

    def changeStatus(self, new_status):
        self.status = new_status or '&nbsp;'
        self.setHTML(self.__getContent())

    def onClick(self, sender, event):
        #As status is the default target of uniBar, we don't want to select anything if click on it
        self.host.select(None)

class ChatText(HTMLPanel):

    def __init__(self, timestamp, nick, mymess, msg):
        _date = datetime.fromtimestamp(float(timestamp or time()))
        _msg_class = ["chat_text_msg"]
        if mymess:
            _msg_class.append("chat_text_mymess")
        HTMLPanel.__init__(self, "<span class='chat_text_timestamp'>%(timestamp)s</span> <span class='chat_text_nick'>%(nick)s</span> <span class='%(msg_class)s'>%(msg)s</span>" %
            {"timestamp": _date.strftime("%H:%M"),
            "nick": "[%s]" % nick,
            "msg_class": ' '.join(_msg_class),
            "msg": msg}
            )
        self.setStyleName('chatText')
    
class ChatPanel(DropCell, ClickHandler, ScrollPanel):

    def __init__(self, host, target, type='one2one'):
        """Panel used for conversation (one 2 one or group chat)
        @param host: SatWebFrontend instance
        @param target: entity (JID) with who we have a conversation (contact's jid for one 2 one chat, or MUC room)
        @param type: one2one for simple conversation, group for MUC"""
        self.host = host
        if not target:
            print "ERROR: Empty target !"
            return
        self.target = target
        title="%s" % target.bare
        title.replace('<','&lt;').replace('>','&gt;')
        _class = ['mb_panel_header']
        ScrollPanel.__init__(self)
        self.content = VerticalPanel()
        self.content.add(HTMLPanel("<div class='%s'>%s</div>" % (','.join(_class),title)))
        self.content.setWidth('100%')
        self.setHeight('100%')
        self.setStyleName('chatPanel')
        self.add(self.content)
        DropCell.__init__(self)
        ClickHandler.__init__(self)
        self.addClickListener(self)

    def onClick(self, sender, event):
        self.host.select(self)
    
    def setUserNick(self, nick):
        """Set the nick of the user, usefull for e.g. change the color of the user"""
        self.nick = nick
    
    def historyPrint(self, size=20):
        """Print the initial history"""
        def getHistoryCB(history):
            stamps=history.keys()
            stamps.sort()
            for stamp in stamps: 
                self.printMessage(history[stamp][0], history[stamp][1], stamp)
        self.host.bridge.call('getHistory', getHistoryCB, self.host.whoami.bare, str(self.target), 20)
    
    def printMessage(self, from_jid, msg, timestamp=None):
        """Print message in chat window. Must be implemented by child class"""
        _jid=JID(from_jid)
        nick = _jid.node 
        mymess = _jid.bare == self.host.whoami.bare #mymess = True if message comes from local user
        """if msg.startswith('/me '):
            self.printInfo('* %s %s' % (nick, msg[4:]),type='me')
            return"""
        self.content.add(ChatText(timestamp, nick, mymess, msg))

class MiddlePannel(HorizontalPanel):
    
    def __init__(self, host):
        self.host=host
        HorizontalPanel.__init__(self)
        self._left = self.host.contactPanel
        self._right = Grid(1,3)
        self._right.setWidth('100%')
        self._right.setHeight('100%')
        self.add(self._left)
        self.setCellWidth(self._left, "15%")
        self.add(self._right)
        self.setCellWidth(self._right, "85%")
        self.setHeight('100%')

    def changePanel(self, idx, panel):
        self._right.setWidget(0,idx,panel)

class MainPanel(VerticalPanel):

    def __init__(self, host):
        self.host=host
        VerticalPanel.__init__(self)

        self.setHorizontalAlignment(HasAlignment.ALIGN_LEFT)
        self.setVerticalAlignment(HasAlignment.ALIGN_TOP)

        menu = Menu()
        uni_box = host.uniBox
        status = host.statusPanel
        self.middle_panel = MiddlePannel(self.host)
        self.middle_panel.setWidth('100%')

        self.add(menu)
        self.add(uni_box)
        self.add(status)
        self.add(self.middle_panel)
        
        self.setCellHeight(menu, "5%")
        self.setCellHeight(uni_box, "5%")
        self.setCellVerticalAlignment(uni_box, HasAlignment.ALIGN_CENTER)
        self.setCellHorizontalAlignment(uni_box, HasAlignment.ALIGN_CENTER)
        self.setCellHeight(self.middle_panel, "90%")
        self.setCellWidth(self.middle_panel, "100%")

        self.setWidth("100%")
        self.setHeight("100%")