import sys
import re
import parsedatetime.parsedatetime as pdt
import parsedatetime.parsedatetime_consts as pdc
import datetime



# Define Globals
theTask = sys.argv[1] # Accepts a command line argument from the terminal
# theTask = "Lunch next monday with John @work"
taskContext = 0
taskProject = 0
taskStart = 0
taskDue = 0
taskDate = 0


# Function for parsing a string and returning a datetime value
def datetimeFromString( s ):
    c = pdc.Constants()
    p = pdt.Calendar(c)
    result, what = p.parse( s )
    dt = 0
	# See http://stackoverflow.com/questions/1810432/handling-the-different-results-from-parsedatetime
    # what was returned (see http://code-bear.com/code/parsedatetime/docs/)
    # 0 = failed to parse
    # 1 = date (with current time, as a struct_time)
    # 2 = time (with current date, as a struct_time)
    # 3 = datetime
    if what in (1,2,3):
        # result is struct_time
        dt = datetime.datetime( *result[:6] )

    if what == 0:
        # Failed to parse
        raise ValueError, ("Don't understand date '"+s+"'")
		dt = "Don't understand date "

    return dt

# Function for getting a specified tag. 
def getFlag(taskString, flag):
    global theTask
    if flag not in taskString: return 0;
    stringArray = re.split('\s', taskString);
    newStringArray = [];
    returnArray = [];
    for w in stringArray:
        if w.startswith(flag):
            flagString = w.strip(flag);
        else:
            newStringArray.append(w);
    theTask = " ".join(newStringArray)
    return flagString

def testFlag(taskString, flag):
    if flag in taskString: return 1;


taskDate = datetimeFromString(theTask)
if taskDate is not 0:
    taskStart = taskDate
    print "Start Date: %s" % (taskStart)
taskContext = getFlag(theTask, '@')
taskProject = getFlag(theTask, '>')
taskDue = getFlag(theTask, 'Due:')
if taskContext is not 0:
    print "Context: %s" % (taskContext)
if taskProject is not 0:
    print "Project: %s" % (taskProject)
print theTask