"""
Flask endpoints for reference (citation) endpoints. Eg, listing references
"inbound" and "outbound" from a specific release or work.
"""

from typing import Optional

from flask import render_template, abort, redirect, request
from fatcat_openapi_client import *
from fatcat_openapi_client.rest import ApiException
from fuzzycat.grobid_unstructured import grobid_api_process_citation, transform_grobid_ref_xml, grobid_ref_to_release
from fuzzycat.simple import close_fuzzy_biblio_matches, close_fuzzy_release_matches

from fatcat_tools.references import enrich_inbound_refs_fatcat, enrich_outbound_refs_fatcat, get_inbound_refs, get_outbound_refs
from fatcat_tools.transforms.access import release_access_options
from fatcat_web import app, api, auth_api
from fatcat_web.forms import *
from fatcat_web.entity_helpers import *


@app.route('/release/<string(length=26):ident>/refs/inbound', methods=['GET'])
def release_view_refs_inbound(ident):

    # lookup release ident, ensure it exists
    try:
        release = api.get_release(ident)
    except ApiException as ae:
        abort(ae.status)

    offset = request.args.get('offset', '0')
    offset = max(0, int(offset)) if offset.isnumeric() else 0

    hits = get_inbound_refs(release_ident=ident, es_client=app.es_client, offset=offset, limit=30)
    enriched_refs = enrich_inbound_refs_fatcat(hits.result_refs, fatcat_api_client=api, expand="container,files,webcaptures")

    return render_template('release_view_fuzzy_refs.html', direction="inbound", entity=release, hits=hits, enriched_refs=enriched_refs), 200

@app.route('/release/<string(length=26):ident>/refs/outbound', methods=['GET'])
def release_view_refs_outbound(ident):

    # lookup release ident, ensure it exists
    try:
        release = api.get_release(ident)
    except ApiException as ae:
        abort(ae.status)

    offset = request.args.get('offset', '0')
    offset = max(0, int(offset)) if offset.isnumeric() else 0

    hits = get_outbound_refs(release_ident=ident, es_client=app.es_client, offset=offset, limit=30)
    enriched_refs = enrich_outbound_refs_fatcat(hits.result_refs, fatcat_api_client=api, expand="container,files,webcaptures")

    return render_template('release_view_fuzzy_refs.html', direction="outbound", entity=release, hits=hits, enriched_refs=enriched_refs), 200

@app.route('/reference/match', methods=['GET', 'POST'])
def reference_match():

    form = ReferenceMatchForm()
    grobid_status = None
    grobid_dict = None

    if form.is_submitted():
        if form.validate_on_submit():
            if form.submit_type.data == 'parse':
                resp_xml = grobid_api_process_citation(form.raw_citation.data)
                if not resp_xml:
                    grobid_status = "failed"
                    return render_template('reference_match.html', form=form, grobid_status=grobid_status), 400
                grobid_dict = transform_grobid_ref_xml(resp_xml)
                if not grobid_dict:
                    grobid_status = "empty"
                    return render_template('reference_match.html', form=form, grobid_status=grobid_status), 200
                #print(grobid_dict)
                release_stub = grobid_ref_to_release(grobid_dict)
                # remove empty values from GROBID parsed dict
                grobid_dict = {k: v for k, v in grobid_dict.items() if v is not None}
                form = ReferenceMatchForm.from_grobid_parse(grobid_dict, form.raw_citation.data)
                grobid_status = "success"
                matches = close_fuzzy_release_matches(es_client=app.es_client, release=release_stub, match_limit=10) or []
            elif form.submit_type.data == 'match':
                matches = close_fuzzy_biblio_matches(es_client=app.es_client, biblio=form.data, match_limit=10) or []
            else:
                raise NotImplementedError()

            for m in matches:
                # expand releases more completely
                m.release = api.get_release(m.release.ident, expand="container,files,filesets,webcaptures", hide="abstract,refs")
                # hack in access options
                m.access_options = release_access_options(m.release)

            return render_template('reference_match.html', form=form, grobid_dict=grobid_dict, grobid_status=grobid_status, matches=matches), 200

        elif form.errors:
            return render_template('reference_match.html', form=form), 400

    return render_template('reference_match.html', form=form), 200