#!/usr/bin/env python3

# HACK: seems 'requests' module bundled with blender isn't bundled with 'idna' module. So force system python for now
import sys
sys.path.insert(0, '/usr/lib/python3.6/site-packages')

import requests
import json
import os
import pathlib
import ast
import argparse
import zipfile
import logging

log = logging.getLogger(__name__)

REQUIRED_KEYS = set(['name', 'blender', 'version'])
SCHEMA_VERSION = 1

class BadAddon(Exception):
    pass


# TODO add repolist class

def load_repo(url):
    """
    Searches local repo.json for repository with a matching 'url' and returns it
    """
    pass #TODO

def write_repo(repo):
    """
    Writes repo to local repolist json
    """
    pass #TODO

def fetch_repo(url: str) -> dict:
    """ Requests repo.json from URL and embeds etag/last-modification headers"""
    local_copy = load_repo(url)
    headers = {}
    if 'etag' in local_copy: headers['If-None-Match'] = local_copy['etag']
    if 'last-modified' in local_copy: headers['If-Modified-Since'] = local_copy['last-modified']

    resp = requests.get(url, headers=headers)

    repo = json.loads(resp.json())
    repo['etag'] = resp.headers.get('etag')
    repo['last-modified'] = resp.headers.get('last-modified')

    write_repo(repo)

def refresh(url):
    # we have to explicitly close the end of the pipe we are NOT using,
    # otherwise no exception will be generated when the other process closes its end.
    pipe[0].close()

    local_repo_path = pathlib.Path(__file__).parent / 'packages'
    local_repo_path.mkdir(exist_ok=True)

    try:
        fetch_repojson(url)
        pipe[1].send(re.status_code)
    finally:
        pipe[1].close()


# class Package:
#     def __init__(self):
#         self.bl_info = None
#         self.url     = None
#         self.type    = None
#
# class Repository:
#     def __init__(self, name):
#         self.name     = name
#         self.packages = None
#
#     def json(self):
#         return json.dumps(self.__dict__)



def main():
    pass
    # print(args)


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Search, install, and manage packages for Blender')
    subparsers = parser.add_subparsers()

    make = subparsers.add_parser('make')
    make.add_argument('path')
    make.set_defaults(func=lambda args: make_repo(pathlib.Path(args.path)))

    args = parser.parse_args()
    args.func(args)

    main()