#!/usr/bin/env python3

import configparser
import json
import os
import sys


from provider import getDefaultProvider
from provider import getProviderData

OUTFILE = 'providers.json'
SCRIPT_NAME = 'gen-providers-json'


def generateProvidersJSON(configPath, outputJSONPath):
    print("output:", outputJSONPath)
    config = configparser.ConfigParser()
    config.read(configPath)

    # TODO as a first step, we just get the defaultProvider.
    # For multi-provider, just add more providers to the dict

    providers = {}
    defaultProvider = getDefaultProvider(config)

    providers['default'] = defaultProvider
    providers['providers'] = []
    providerData = getProviderData(defaultProvider, config)
    addCaData(providerData, configPath)

    providers['providers'].append(providerData)
    with open(outputJSONPath, 'w', encoding='utf-8') as f:
        json.dump(providers, f, ensure_ascii=False, indent=4)

def addCaData(data, configfile):
    provider = data.get('name').lower()
    folder, f = os.path.split(configfile)
    caFile = os.path.join(folder, provider, provider + '-ca.crt')
    if not os.path.isfile(caFile):
        bail('[!] Cannot find CA file in {path}'.format(path=caFile))
    with open(caFile) as ca:
        data['caCertString'] = ca.read().strip()

def bail(msg=None):
    if not msg:
        print("ERROR: not enough arguments!")
        print('Usage: {scriptname}.py <output>'.format(
            scriptname=SCRIPT_NAME))
    else:
        print(msg)
    sys.exit(1)

if __name__ == "__main__":
    print("[+] Generating providers.json...")
    if len(sys.argv) != 2:
        bail()

    VENDOR_PATH = os.environ.get('VENDOR_PATH')
    conf = os.path.join(VENDOR_PATH, 'vendor.conf')
    output = sys.argv[1]
    generateProvidersJSON(conf, output)