#!/usr/bin/env python

import json
import sys
import shlex

try:
    import commentjson
    json_load = commentjson.load
except ImportError:
    json_load = json.load

def main(params_list):
    params = dict(x.split("=", 1) for x in params_list)
    path = params.pop('path')
    changed = False

    for key in params.keys():
      if key.startswith('_ansible_'):
        params.pop(key)

    with open(path) as f:
        obj = json_load(f)
        for (key, target) in params.items():
            parts = key.split('.')
            ref = obj
            for part in parts[:-1]:
                if part not in ref:
                    ref[part] = {}
                ref = ref[part]

            last_part = parts[-1]
            if target == 'unset':
                if last_part in ref:
                    del ref[last_part]
                    changed = True
            else:
#                if target.isdigit():
#                    target = int(target)
#                if target == 'null':
#                    target = None
#                if target == 'false':
#                    target = False
#                if target == 'true':
#                    target = True
                if last_part not in ref or ref[last_part] != target:
                    ref[last_part] = target
                    changed = True

    if changed:
        with open(path, 'w') as f:
            json.dump(obj, f, indent=2, separators=(',', ': '), sort_keys=True)

    print(json.dumps({'changed': changed}))


if __name__ == '__main__':
    if len(sys.argv) == 2:
        main(shlex.split(open(sys.argv[1]).read()))
    else:
        main(sys.argv[1:])