#!/usr/local/bin/python


import Tkinter as tk
from datetime import datetime,timedelta
import bisect
from sets import Set
from gnosis.xml.objectify import XML_Objectify

"""here's what's in an event:
    <event description="tester"
           location="Office"
           categories="-1009861468"
           uid="-1076871148" rid="18"
           rinfo="1"
           type="AllDay"
           alarm="10" sound="silent"
           rtype="Daily" rfreq="2" rhasenddate="1" enddt="1077868800"
           created="1076871138"
           start="1076821200" end="1076907599"
           note="note"  />
"""
datebookxml = "/home/drewp/zaurus-mirror/home/root/Applications/datebook/datebook.xml"

def datetime_field(txt):
    return datetime.fromtimestamp(float(txt))

def sortedevents(filename=datebookxml):
    """read xml, get events, sort by date, and return the ones before
    now, and the ones after now"""
    events={}
    doc = XML_Objectify(filename).make_instance()[0]
    for ev in doc.events.event:
        start,end = [datetime.fromtimestamp(float(t)) for t
                     in [ev.start,ev.end]]
        events[(start,end)] = ev
    events = events.items()
    events.sort() # by start, then end
    todaystart = datetime.now().date()
    todayend=datetime.now().date()+timedelta(days=1)
    i = bisect.bisect(events,((todaystart,todaystart),None))
    j = bisect.bisect(events,((todayend,todayend),None))
    events=[e[1] for e in events] # normal events again
    before,today,after = events[:i],events[i:j],events[j:]
    return before,today,after
    

seendates=Set()
def ev_widget(master,ev):
    global seendates
    now=datetime.now()
    f=tk.Frame(master,bd=2,relief='raised')
    start=datetime_field(ev.start)
    if start.date()<now.date():
        color='#442265','#442265','#a688c3'
        timetxt=start.strftime("%a %m/%d %H:%M")
    elif start.date()==now.date():
        color='#008744','#00cc66','#6ae1a6'
        if start<now:
            color='#008744','#008744','#6ae1a6'
        timetxt=start.strftime("%H:%M")
    else: # future
        color='#656565','#999999','#c3c3c3'
        if start not in seendates:
            timetxt=start.strftime("%a %m/%d %H:%M")
            if (start-now).days<7:
                timetxt="This "+timetxt
        else:
            timetxt=start.strftime("%H:%M")
            
    tk.Label(f,bg=color[0],fg=color[2],text=timetxt,
             font="verdana 8 bold",width=20,anchor='w',
             pady=0).pack(side='left')
    tk.Label(f,text=ev.description,bg=color[1],
             font="verdana 8 bold",fg='white',
             anchor='w',pady=0).pack(side='left',fill='x',exp=1)
    return f

root=tk.Tk()
root.wm_title("nothing_zview")
root.wm_geometry("1384x214+0+829")
root.tk_setPalette("steelblue4")

def eventsarea(master,**kw):
    f=tk.Frame(master,**kw)
    before,today,after=sortedevents()

    displayed=before[-2:]+today+after[:5]
    if len(displayed)>9:
        displayed=displayed[2:] # lose the past events

    for ev in displayed:
        w=ev_widget(f,ev)
        w.pack(side='top',fill='x',exp=1)
    return f

ea=None
def redraw():
    global ea
    if ea is not None:
        ea.destroy()
    ea=eventsarea(root,width=300)
    ea.pack(side='left',fill='y')
    root.after(3600*1000,redraw)

redraw()

root.mainloop()