#!/usr/bin/env python3

from __future__ import print_function
import sys
sys.path.append('/usr/share/botch')
from util import read_reduced_deps

if __name__ == '__main__':
    import argparse
    parser = argparse.ArgumentParser(
        description=("Display the difference between two files with " +
                     "droppable build dependencies"))
    parser.add_argument('droppable1', type=read_reduced_deps, help='file 1')
    parser.add_argument('droppable2', type=read_reduced_deps, help='file 2')
    parser.add_argument(
        '-v', '--verbose', action='store_true', help='be verbose')
    args = parser.parse_args()

    only_in_1 = set(args.droppable1.keys()) - set(args.droppable2.keys())
    only_in_2 = set(args.droppable2.keys()) - set(args.droppable1.keys())
    in_both = set(args.droppable1.keys()) & set(args.droppable2.keys())

    for srcpkg in in_both:
        d1 = set(args.droppable1[srcpkg])
        d2 = set(args.droppable2[srcpkg])
        o_i_1 = d1 - d2
        o_i_2 = d2 - d1
        if not o_i_1 and not o_i_2:
            continue
        print(srcpkg)
        if o_i_1:
            print("< %s" % (" ".join(o_i_1)))
        if o_i_2:
            print("> %s" % (" ".join(o_i_2)))

    if only_in_1:
        print("only in <: %s", ",".join(only_in_1))

    if only_in_2:
        print("only in >: %s", ",".join(only_in_2))