#!/usr/bin/env python3

"""
Loads a text document into TrustGraph processing.
"""

import pulsar
from pulsar.schema import JsonSchema
import hashlib
import argparse
import os
import time
import uuid

from trustgraph.api import Api
from trustgraph.knowledge import hash, to_uri
from trustgraph.knowledge import PREF_PUBEV, PREF_DOC, PREF_ORG
from trustgraph.knowledge import Organization, PublicationEvent
from trustgraph.knowledge import DigitalDocument

default_url = os.getenv("TRUSTGRAPH_URL", 'http://localhost:8088/')
default_user = 'trustgraph'
default_collection = 'default'

class Loader:

    def __init__(
            self,
            url,
            user,
            collection,
            metadata,
    ):

        self.api = Api(url)

        self.user = user
        self.collection = collection
        self.metadata = metadata

    def load(self, files):

        for file in files:
            self.load_file(file)

    def load_file(self, file):

        try:

            path = file
            data = open(path, "rb").read()

            # Create a SHA256 hash from the data
            id = hash(data)

            id = to_uri(PREF_DOC, id)

            self.metadata.id = id

            self.api.load_text(
                text=data, id=id, metadata=self.metadata, 
#                user=self.user,
#                    collection=self.collection,
            )

            print(f"{file}: Loaded successfully.")

        except Exception as e:
            print(f"{file}: Failed: {str(e)}", flush=True)

def main():

    parser = argparse.ArgumentParser(
        prog='tg-load-text',
        description=__doc__,
    )

    parser.add_argument(
        '-u', '--url',
        default=default_url,
        help=f'API URL (default: {default_url})',
    )

    parser.add_argument(
        '-U', '--user',
        default=default_user,
        help=f'User ID (default: {default_user})'
    )

    parser.add_argument(
        '-C', '--collection',
        default=default_collection,
        help=f'Collection ID (default: {default_collection})'
    )

    parser.add_argument(
        '--name', help=f'Document name'
    )

    parser.add_argument(
        '--description', help=f'Document description'
    )

    parser.add_argument(
        '--copyright-notice', help=f'Copyright notice'
    )

    parser.add_argument(
        '--copyright-holder', help=f'Copyright holder'
    )

    parser.add_argument(
        '--copyright-year', help=f'Copyright year'
    )

    parser.add_argument(
        '--license', help=f'Copyright license'
    )

    parser.add_argument(
        '--publication-organization', help=f'Publication organization'
    )

    parser.add_argument(
        '--publication-description', help=f'Publication description'
    )

    parser.add_argument(
        '--publication-date', help=f'Publication date'
    )

    parser.add_argument(
        '--document-url', help=f'Document URL'
    )

    parser.add_argument(
        '--keyword', nargs='+', help=f'Keyword'
    )

    parser.add_argument(
        '--identifier', '--id', help=f'Document ID'
    )

    parser.add_argument(
        'files', nargs='+',
        help=f'File to load'
    )

    args = parser.parse_args()

    while True:

        try:

            document = DigitalDocument(
                id,
                name=args.name,
                description=args.description,
                copyright_notice=args.copyright_notice,
                copyright_holder=args.copyright_holder,
                copyright_year=args.copyright_year,
                license=args.license,
                url=args.document_url,
                keywords=args.keyword,
            )

            if args.publication_organization:
                org = Organization(
                    id=to_uri(PREF_ORG, hash(args.publication_organization)),
                    name=args.publication_organization,
                )
                document.publication = PublicationEvent(
                    id = to_uri(PREF_PUBEV, str(uuid.uuid4())),
                    organization=org,
                    description=args.publication_description,
                    start_date=args.publication_date,
                    end_date=args.publication_date,
                )

            p = Loader(
                url=args.url,
                user=args.user,
                collection=args.collection,
                metadata=document,
            )

            p.load(args.files)

            print("All done.")
            break

        except Exception as e:

            print("Exception:", e, flush=True)
            print("Will retry...", flush=True)

        time.sleep(10)

main()