import json
import os
import sys
import requests
import helpers
import argparse


# for test usage:
# python3 echotrail.py '{"artifactType":"hash", "value":"438b6ccd84f4dd32d9684ed7d58fd7d1e5a75fe3f3d12ab6c788e6bb0ffad5e7"}'
# You will need to provide an API key in the .yaml file.
def checkConfigRequirements(conf):
    if not conf['api_key']:
        sys.exit(126)
    else:
        return True


def sendReq(conf, observ_value):
    # send a get requests using a user-provided API key and the API url
    url = conf['base_url'] + observ_value
    headers = {'x-api-key': conf['api_key']}
    response = requests.request('GET', url=url, headers=headers)
    return response.json()


def prepareResults(raw):
    # checking for the 'filenames' key alone does
    # not work when querying by filename.
    # So, we can account for a hash query, a filename query,
    # and anything else with these if statements.
    if 'filenames' in raw.keys():
        summary = raw['filenames'][0][0]
    elif 'tags' in raw.keys():
        summary = raw['tags'][0][0]
    else:
        summary = 'inconclusive'
    status = 'info'
    return {'response': raw, 'summary': summary, 'status': status}


def analyze(conf, input):
    # put all of our methods together and return a properly formatted output.
    checkConfigRequirements(conf)
    meta = helpers.loadMetadata(__file__)
    data = helpers.parseArtifact(input)
    helpers.checkSupportedType(meta, data['artifactType'])
    response = sendReq(conf, data['value'])
    return prepareResults(response)


def main():
    dir = os.path.dirname(os.path.realpath(__file__))
    parser = argparse.ArgumentParser(
        description='Search Echotrail for a given artifact')
    parser.add_argument(
        'artifact', help='the artifact represented in JSON format')
    parser.add_argument('-c', '--config', metavar='CONFIG_FILE', default=dir + '/echotrail.yaml',
                        help='optional config file to use instead of the default config file')
    args = parser.parse_args()
    if args.artifact:
        results = analyze(helpers.loadConfig(args.config), args.artifact)
        print(json.dumps(results))


if __name__ == '__main__':
    main()