#!/usr/bin/python

# GPL3.0 licensed
# Developed by r3dwall
# http://git.qwik.i2p/r3dwall/newday

import sys
import os

# Input file
t = 0

# Get command line options
opts = {"help":0, "override":0, "output":0}

for i, o in enumerate(sys.argv):
    if i == 1:
        t = o

    elif o == "-o":
        opts["output"] = sys.argv[i+1]

    elif o == "-y":
        opts["override"] = 1

    elif o == "-h" or o == "--help":
        opts["help"] = 1
    else:
        pass

# Help message
if opts["help"] or not t:
    print("Usage: ./newday_emacs.py <input_file> <options>")
    print("Simple util developed in python to take a daily emacs org file and transform it into another one with the name 'today.org' with only things that were left undone for the day")
    print("-y | overwrite output file")
    print("-o | output file")
    print("-h | this help")

    sys.exit()

# Locate file
try:
    f1 = open(t, "r")

except:
    print("File {} does not exist. For help type ./newday_emacs.py -h".format(t))
    sys.exit()

# Read file
read = f1.readlines()
f1.close()

d = []

# Save lines with only undone tasks ([]), todos and metainfo from the beginning of the file
for l in read:
    if "TODO" in l:
        d.append(l)

    elif "[ ]" in l:
        d.append(l)
    
    elif "#+" in l:
        d.append(l)

    else:
        pass


# Write everything to today.org
t = opts["output"] if opts["output"] != 0 else "today.org"

if opts["override"]:
    pass    
elif t in os.listdir():
    print("File exists. Use -y to overwrite.")
    sys.exit()

# Transform d into string
c = ""
for e in d:
    if "TODO" in e or "#!" in e:
        c += "\n{}".format(e)
    else:
        c += e

del d

f2 = open(t, "w+")
f2.write(c)
f2.close()