#!/usr/bin/env python3

import os
import re
import subprocess
import sys
from datetime import datetime

TAGS = ['t', 'due']

def getTag(item):
    if ":" not in item:
        return None
    try:
        sub = re.findall("[^ ]+:\\d\\d\\d\\d-\\d\\d-\\d\\d", item)[0].strip()
    except IndexError:
        return None
    return sub.split(":")

def getDate(date):
    return datetime.strptime(date, "%Y-%m-%d")

def highlightDate(item):
    full_tag = item[1] + ":" + item[0]
    if getDate(item[0]) < datetime.today():
        #if the date has already passed, wrap with bold/unbold escapes
        item[2] = item[2].replace(full_tag, '\033[1m' + full_tag + '\033[22m')
    return item

def relativeDate(item):
    full_tag = item[1] + ":" + item[0]
    difference = getDate(item[0]) - datetime.today()
    item[2] = item[2].replace(full_tag, item[1] + ":" + str(difference.days) + "days")
    return item

def main(argv):
    lines = subprocess.check_output(["todo.sh", "list"]).decode(encoding='UTF-8').split('\n')
    items = []
    for line in lines:
        tag = getTag(line)
        if tag is not None:
            items.append([tag[1], tag[0], line])

    items.sort()
    for i in items:
        if len(argv) > 2 and argv[2] == "rel":
            print(relativeDate(highlightDate(i))[2])
        else:
            print(highlightDate(i)[2])

#if __name__ == '__main__':
main(sys.argv)