#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import re
import os
import pprint
import json


def create_paths_list(dirname, filenames):
    paths = []
    for basename in filenames:
        path = dirname + basename
        paths.append(path)
    return paths


def read_files(paths):
    content = []
    for path in paths:
        file_info = read_file(path)
        content.append(file_info)
    return content


def read_file(path):
    with open(path) as f:
        file_content = f.read()
        item = {"path": path,
                "content": file_content}
    return item


def extract_functions(file_content):
    pattr = re.compile("DYNAMIC_API.*?\);", re.DOTALL)
    res = pattr.findall(file_content)
    return res


def process(header, out_dir):
    # Process and create data structure
    print("processing path: " + header.get("path") + "...")
    basename = os.path.basename(header.get("path"))
    # strip suffix, will be added output format dependently
    basename_minus_suffix = re.sub("\..*$",'',basename)

    # add outpath
    outpath = out_dir + basename_minus_suffix
    header["outpath"] = outpath

    # add functions
    functions = extract_functions(header.get("content"))
    header["functions"] = functions

    return header


def write_json(header):
    header["outpath"] += ".json"
    with open(header.get("outpath"), "w+") as f:
        json.dump(header, f, indent=4)



def main():
    # Input
    prefix = r"/Users/heck/local-default/"
    filenames = ["pEpEngine.h",
                 "keymanagement.h"]
    # Output
    out_dir = "data/"

    basename = prefix + r"include/pEp/"

    if not os.path.isdir(out_dir):
        os.makedirs(out_dir)

    paths = create_paths_list(basename, filenames)
    headers = read_files(paths)

    for header in headers:
        # Process
        header = process(header, out_dir)
        # Output
        write_json(header)


if __name__ == "__main__":
    main()