import json
import sys
import urllib.request
import logging
logging.basicConfig(filename='tomcat/logs/collation_editor.log',level=logging.DEBUG)

def eprint(*args, **kwargs):
    print(*args, file=sys.stderr, **kwargs)
    logging.debug(*args, **kwargs)

class VMRCollate (object) :

    def doCollate(self, data, options) :

        eprint('Hey!!! We\'re calling our special gift from Cat!!!')
        #use collateX Java microservices
        if 'algorithm' in options:
            data['algorithm'] = options['algorithm'] #'needleman-wunsch'#'dekker' #'needleman-wunsch'#'dekker-experimental'#
        if 'tokenComparator' in options:
            data['tokenComparator'] = options['tokenComparator'] #{"type": "levenshtein", "distance": 2}#{'type': 'equality'}

        if 'collatexHost' in options:
            target = 'http://%s/collate' % options['collatexHost']
        else:
            target = 'http://localhost:7369//collate'

        json_witnesses = json.dumps(data)#, default=json_util.default)
        if 'outputFormat' in options:
            accept_header = self.convert_header_argument(options['outputFormat'])
        else:
            accept_header = "application/json"

        req = urllib.request.Request(target)
        req.add_header('content-type', 'application/json')
        req.add_header('Accept', accept_header)
        eprint('about to open target: ' + target)
        # with open("small_witness.json", "w") as write_file:
        #     json.dump(payload, write_file)
        try:
            response = urllib.request.urlopen(req, json_witnesses.encode('utf-8'))
        except urllib.error.HTTPError as e:
            eprint(e.code)
            eprint(e.read())
            return

        #print(response.read().decode('utf-8'))
        return response.read()


    def convert_header_argument(self, accept):
        """Convert shortname to MIME type."""
        if accept == 'json' or accept == 'lcs':
            return "application/json"
        elif accept == 'tei':
            return "application/tei+xml"
        elif accept == 'graphml':
            return 'application/graphml+xml'
        elif accept == 'dot':
            return 'text/plain'
        elif accept == 'svg':
            return 'image/svg+xml'