#!/usr/bin/python3

# update the format of the admitted_date field in JSON files related to individuals.

import os
import json


def convert_year(date):
    """ convert date string d/m/y to a standardized format. """
    d, m, y = date.split('/')
    return "/".join(['%d%s' % (19 if int(y) >= 50 else 20, y), m, d])


def write_json_file(workspace, file, data):
    """  write data to a JSON with sorted keys. """
    file = workspace + file
    print(file)
    print(data)
    with open(file, "w") as jsonFile:
        json_contents = json.dumps(data, sort_keys=True, indent=4)
        print(json_contents)
        jsonFile.write(json_contents)


def documents(workspace, fileList):
    """ load each file's JSON content and yielding the file name along with its contents."""
    print("Entering documents function")
    print("length of fileList: " + str(len(fileList)))
    # for file in fileList:
    for index, file in enumerate(fileList):
        print(index, '--->', file)
        # For each file in the list, read its json and provide a generator
        contents = json.load(open(workspace + file))
        # print(contents)
        yield file, contents


# workspace_home = '/var/tmp/lawsoc_new/'
workspace_home = os.getcwd()
workspace = workspace_home + "/json_out/"
person_workspace = workspace + "person/"


if __name__ == '__main__':
    # Get a list of files in the workspace...
    person_fileList = os.listdir(person_workspace)

    for file, data in documents(person_workspace, person_fileList):
        tmp = data["admitted_date"]
        # print("Person fileList: ", person_fileList)
        # print("Person workspace: ", person_workspace)
        # print("File: ", file)
        # print(type(tmp))
        # print(len(tmp))
        if len(tmp):
            data["admitted_date"] = convert_year(tmp)
            # print(tmp)
            # print(data["admitted_date"])
            write_json_file(person_workspace, file, data)
        else:
            data["admitted_date"] = None
            # print(tmp)
            # print(data["admitted_date"])
            write_json_file(person_workspace, file, data)