"""API for fetching metadata using an API"""
import json

from string import Template
from http.client import RemoteDisconnected
from urllib.error import URLError
from flask import Blueprint
from flask import jsonify
from flask import request
from flask import current_app

from pyld import jsonld
from SPARQLWrapper import JSON, JSONLD, SPARQLWrapper

from gn3.db.rdf import get_dataset_metadata
from gn3.db.rdf import get_phenotype_metadata
from gn3.db.rdf import sparql_query
from gn3.db.rdf import RDF_PREFIXES, PREFIXES


metadata = Blueprint("metadata", __name__)


@metadata.route("/datasets/<name>", methods=["GET"])
def datasets(name):
    """Fetch a dataset's metadata given it's ACCESSION_ID or NAME"""
    try:
        sparql = SPARQLWrapper(current_app.config.get("SPARQL_ENDPOINT"))
        sparql.setQuery(Template("""
$prefix

CONSTRUCT {
	  ?dataset ?predicate ?term ;
                   rdf:type dcat:Dataset ;
	           ex:belongsToInbredSet ?inbredSetName ;
                   gnt:usesNormalization ?normalizationLabel ;
                   dcat:contactPoint ?investigatorName ;
                   xkos:classifiedUnder  ?altName ;
                   ex:platform ?platform ;
                   ex:tissue ?tissue .
          ?platform ?platformPred  ?platformObject ;
                    ex:info ?platformInfo .
          ?tissue rdfs:label ?tissueName ;
                  rdf:type gnc:tissue ;
                  ex:info ?tissueInfo .
} WHERE {
	 ?dataset rdf:type dcat:Dataset ;
	          xkos:classifiedUnder ?inbredSet ;
                  rdfs:label "$name" .
         OPTIONAL {
            ?inbredSet ^skos:member gnc:Set ;
                       rdfs:label ?inbredSetName .
         } .
         OPTIONAL {
            ?type ^xkos:classifiedUnder ?dataset ;
                  ^skos:member gnc:DatasetType ;
                  skos:prefLabel ?altName .
         } .
         OPTIONAL {
            ?normalization ^gnt:usesNormalization ?dataset ;
                           rdfs:label ?normalizationLabel .
         } .
         OPTIONAL {
           ?investigator foaf:name ?investigatorName ;
                         ^dcat:contactPoint ?dataset .
         } .
         OPTIONAL {
           ?platform ^gnt:usesPlatform ?dataset ;
                     ?platformPred  ?platformObject .
         } .
         OPTIONAL {
           ?dataset gnt:hasPlatformInfo ?platformInfo .
         } .
         OPTIONAL {
           ?dataset gnt:hasTissueInfo ?tissueInfo .
         } .
         OPTIONAL {
           ?dataset gnt:hasTissue ?tissue .
           ?tissue rdfs:label ?tissueName .
         } .
	 FILTER (!regex(str(?predicate), '(classifiedUnder|usesNormalization|contactPoint|hasPlatformInfo|tissueInfo)', 'i')) .
         FILTER (!regex(str(?platformPred), '(classifiedUnder|geoSeriesId|hasGoTreeValue)', 'i')) .
}""").substitute(prefix=RDF_PREFIXES, name=name))
        results = sparql.queryAndConvert()
        results = json.loads(
            results.serialize(format="json-ld")
        )
        frame = {
            "@context": PREFIXES | {
                "data": "@graph",
                "type": "@type",
                "id": "@id",
                "inbredSet": "ex:belongsToInbredSet",
                "description": "dct:description",
                "created":  "dct:created",
                "normalization": "gnt:usesNormalization",
                "classifiedUnder": "xkos:classifiedUnder",
                "accessRights": "dct:accessRights",
                "accessionId": "dct:identifier",
                "title": "dct:title",
                "label": "rdfs:label",
                "altLabel": "skos:altLabel",
                "prefLabel": "skos:prefLabel",
                "contactPoint": "dcat:contactPoint",
                "organization": "foaf:Organization",
                "info": "ex:info",
                "caseInfo": "gnt:hasCaseInfo",
                "geoSeriesId": "gnt:hasGeoSeriesId",
                "experimentDesignInfo": "gnt:hasExperimentDesignInfo",
                "notes": "gnt:hasNotes",
                "processingInfo": "gnt:hasDataProcessingInfo",
                "acknowledgement": "gnt:hasAcknowledgement",
                "tissue": "ex:tissue",
                "platform": "ex:platform",
            },
            "type": "dcat:Dataset",
        }
        return jsonld.compact(jsonld.frame(results, frame), frame)
    # The virtuoso server is misconfigured or it isn't running at all
    except (RemoteDisconnected, URLError):
        return jsonify({})


@metadata.route("/datasets/search/<term>", methods=["GET"])
def search_datasets(term):
    """Search datasets"""
    try:
        args = request.args
        page = args.get("page", 0)
        page_size = args.get("limit", 10)
        sparql = SPARQLWrapper(current_app.config.get("SPARQL_ENDPOINT"))
        sparql.setQuery(Template("""
$prefix

CONSTRUCT {
        ex:result rdf:type ex:resultType ;
                  ex:totalCount ?totalCount ;
                  ex:currentPage $offset ;
                  ex:items [
                    rdfs:label ?label ;
                    dct:title ?title ;
                    ex:belongsToInbredSet ?inbredSetName ;
                    xkos:classifiedUnder ?datasetType
          ]
} WHERE {
{
        SELECT ?dataset ?label ?inbredSetName ?datasetType ?title WHERE {
        ?dataset rdf:type dcat:Dataset ;
                 rdfs:label ?label ;
                 xkos:classifiedUnder ?inbredSet .
        ?inbredSet ^skos:member gnc:Set ;
                   rdfs:label ?inbredSetName .
        ?label bif:contains "'$term'" .
        OPTIONAL {
          ?dataset dct:title ?title .
        } .
        OPTIONAL {
          ?classification ^xkos:classifiedUnder ?dataset ;
                          ^skos:member gnc:DatasetType ;
                          ?typePredicate ?typeName ;
			  skos:prefLabel ?datasetType .
        }
    } ORDER BY ?dataset LIMIT $limit OFFSET $offset
}

{
        SELECT (COUNT(*)/$limit+1 AS ?totalCount) WHERE {
        ?dataset rdf:type dcat:Dataset ;
                 rdfs:label ?label .
        ?label bif:contains "'$term'" .
        }
}

}
""").substitute(prefix=RDF_PREFIXES, term=term, limit=page_size, offset=page))
        return jsonld.frame(
            json.loads(
                sparql.queryAndConvert().serialize(format="json-ld")),
            {
                "@context": PREFIXES | {
                    "data": "@graph",
                    "type": "@type",
                    "id": "@id",
                    "inbredSet": "ex:belongsToInbredSet",
                    "classifiedUnder": "xkos:classifiedUnder",
                    "dataset": "rdfs:label",
                    "title": "dct:title",
                    "currentPage": "ex:currentPage",
                    "result": "ex:result",
                    "results": "ex:items",
                    "resultItem": "ex:resultType",
                    "pages": "ex:totalCount"
                },
                "type": "resultItem",
            }
        )
    # The virtuoso server is misconfigured or it isn't running at all
    except (RemoteDisconnected, URLError):
        return jsonify({})


@metadata.route("/publications/<name>", methods=["GET"])
def publications(name):
    """Fetch a publication's metadata given it's ACCESSION_ID"""
    try:
        if "unpublished" in name:
            name = f"gn:unpublished{name}"
        else:
            name = f"pubmed:{name}"
        sparql = SPARQLWrapper(current_app.config.get("SPARQL_ENDPOINT"))
        sparql.setQuery(Template("""
$prefix

CONSTRUCT {
    $name ?predicate ?object .
} WHERE {
    $name rdf:type fabio:ResearchPaper ;
          ?predicate ?object .
    FILTER (!regex(str(?predicate), '(hasPubMedId)', 'i')) .
}
""").substitute(name=name, prefix=RDF_PREFIXES))
        return jsonld.compact(
            json.loads(sparql.queryAndConvert().serialize(format="json-ld")),
            {
                "@context": PREFIXES | {
                    "type": "@type",
                    "id": "@id",
                    "title": "dct:title",
                    "journal": "fabio:Journal",
                    "volume": "prism:volume",
                    "page": "fabio:page",
                    "creator": "dct:creator",
                    "abstract": "dct:abstract",
                    "year": {
                        "@id": "fabio:hasPublicationYear",
                        "@type": "xsd:gYear",
                    },
                    "month": {
                        "@id": "prism:publicationDate",
                        "@type": "xsd:gMonth"
                    },
                },
            })
    # The virtuoso server is misconfigured or it isn't running at all
    except (RemoteDisconnected, URLError):
        return jsonify({})


@metadata.route("/publications/search/<term>", methods=["GET"])
def search_publications(term):
    """Search publications"""
    try:
        args = request.args
        page = args.get("page", 0)
        page_size = args.get("limit", 10)
        sparql = SPARQLWrapper(current_app.config.get("SPARQL_ENDPOINT"))
        sparql.setQuery(Template("""
$prefix

CONSTRUCT {
        ex:result rdf:type ex:resultType ;
                  ex:totalCount ?totalCount ;
                  ex:currentPage $offset ;
                  ex:items [
                     rdfs:label ?publication ;
                     dct:title ?title ;
        ]
} WHERE {
{
        SELECT ?publication ?title ?pmid WHERE {
        ?pub rdf:type fabio:ResearchPaper ;
             ?predicate ?object ;
             dct:title ?title .
        ?object bif:contains "'$term'" .
        BIND( STR(?pub) AS ?publication ) .
        }  ORDER BY ?title LIMIT $limit OFFSET $offset
    }
{
        SELECT (COUNT(*)/$limit+1 AS ?totalCount) WHERE {
        ?publication rdf:type fabio:ResearchPaper ;
                     ?predicate ?object .
        ?object bif:contains "'$term'" .
        }
}
}
""").substitute(prefix=RDF_PREFIXES, term=term, limit=page_size, offset=page))
        results = sparql.queryAndConvert()
        results = json.loads(results.serialize(format="json-ld"))
        frame = {
            "@context": PREFIXES | {
                "data": "@graph",
                "type": "@type",
                "id": "@id",
                "title": "dct:title",
                "pubmed": "fabio:hasPubMedId",
                "currentPage": "ex:currentPage",
                "result": "ex:result",
                "results": "ex:items",
                "resultItem": "ex:resultType",
                "pages": "ex:totalCount",
                "url": "rdfs:label",
            },
            "type": "resultItem",
            "paper": {
                "@type": "fabio:ResearchPaper",
                "@container": "@index"
            }
        }
        return jsonld.frame(results, frame)
    except (RemoteDisconnected, URLError):
        return jsonify({})

@metadata.route("/phenotype/<name>", methods=["GET"])
def phenotype(name):
    """Fetch a phenotype's metadata given it's name"""
    try:
        return jsonify(
            get_phenotype_metadata(
                SPARQLWrapper(current_app.config.get("SPARQL_ENDPOINT")),
                name,
            ).data
        )
    # The virtuoso server is misconfigured or it isn't running at all
    except (RemoteDisconnected, URLError):
        return jsonify({})


@metadata.route("/genotypes/<name>", methods=["GET"])
def genotypes(name):
    """Fetch a genotype's metadata given it's name"""
    try:
        sparql = SPARQLWrapper(current_app.config.get("SPARQL_ENDPOINT"))
        sparql.setQuery(Template("""
$prefix

CONSTRUCT {
        ?genotype ?predicate ?object .
        ?species rdfs:label ?speciesName .
} WHERE {
        ?genotype rdf:type gnc:Genotype ;
                  rdfs:label "$name" ;
                  ?predicate ?object .
        OPTIONAL {
            ?species ^xkos:classifiedUnder ?genotype ;
                      rdfs:label ?speciesName .
        }
}
""").substitute(prefix=RDF_PREFIXES, name=name))
        results = json.loads(sparql.queryAndConvert().serialize(format="json-ld"))
        if not results:
            return jsonify({})
        frame = {
            "@context": PREFIXES | {
                "data": "@graph",
                "type": "@type",
                "id": "@id",
                "name": "rdfs:label",
                "chr": "gnt:chr",
                "mb": "gnt:mb",
                "mbMm8": "gnt:mbMm8",
                "mb2016": "gnt:mb2016",
                "sequence": "gnt:hasSequence",
                "source": "gnt:hasSource",
                "species": "xkos:classifiedUnder",
                "alternateSource": "gnt:hasAltSourceName",
                "comments": "rdfs:comments",
                "chrNum": {
                    "@id": "gnt:chrNum",
                    "@type": "xsd:int",
                }
            },
            "type": "gnc:Genotype",
        }
        return jsonld.compact(jsonld.frame(results, frame), frame)
    except (RemoteDisconnected, URLError):
        return jsonify({})


@metadata.route("/genewiki/<symbol>", methods=["GET"])
def get_genewiki_entries(symbol):
    """Fetch the GN and NCBI GeneRIF entries"""
    try:
        gn_entries = sparql_query(
            sparql_conn=SPARQLWrapper(current_app.config.get("SPARQL_ENDPOINT")),
            query=Template("""
$rdf_prefixes

SELECT ?author ?geneCategory (STR(?gnEntry) AS ?entry)
       (STR(?createdOn) AS ?created)
       (GROUP_CONCAT(DISTINCT ?pmid; SEPARATOR=',') AS ?PubMedId)
       ?weburl
WHERE {
  ?generif gn:symbol ?symbol .
  ?generif gn:geneWikiEntryOfGn _:gnEntry .
  _:gnEntry gn:geneWikiEntry ?gnEntry;
            dct:creator ?author;
            dct:created ?createdOn .
  OPTIONAL { _:gnEntry gn:geneCategory ?geneCategory } .
  OPTIONAL { _:gnEntry foaf:homepage ?weburl } .
  OPTIONAL { _:gnEntry dct:source ?pmid} .
  OPTIONAL {
    ?generif gn:wikiEntryOfSpecies ?speciesName .
    ?species gn:name ?speciesName ;
             gn:binomialName ?speciesBinomialName .
  } .
  FILTER( lcase(?symbol) = '$symbol' )
} GROUP BY ?author ?createdOn ?gnEntry
           ?generif ?symbol ?weburl
	   ?geneCategory
ORDER BY ASC(?createdOn)""").substitute(rdf_prefixes=RDF_PREFIXES,
                                        symbol=str(symbol).lower()))
        ncbi_entries = sparql_query(
            sparql_conn=SPARQLWrapper(current_app.config.get("SPARQL_ENDPOINT")),
            query=Template("""
$rdf_prefixes

SELECT ?speciesBinomialName (STR(?gnEntry) AS ?entry)
       (STR(?createdOn) AS ?createdOn)
       (GROUP_CONCAT(DISTINCT REPLACE(STR(?pmid), pubmed:, ''); SEPARATOR=',') AS ?PubMedId)
       ?generif
WHERE {
  ?generif gn:symbol ?symbol .
  ?generif gn:geneWikiEntryOfNCBI [
    gn:geneWikiEntry ?gnEntry ;
    dct:created ?createdOn ;
    dct:source ?pmid
  ] .
  OPTIONAL {
    ?generif gn:wikiEntryOfSpecies ?speciesName .
    ?species gn:name ?speciesName ;
             gn:binomialName ?speciesBinomialName .
  } .
  FILTER( lcase(?symbol) = '$symbol' )
} GROUP BY ?createdOn ?gnEntry
           ?generif ?symbol
	   ?speciesBinomialName
ORDER BY ASC(?createdOn)""").substitute(rdf_prefixes=RDF_PREFIXES,
                                        symbol=str(symbol).lower()))
        return jsonify({
            "gn_entries": list(map(lambda x: x.data, gn_entries)),
            "ncbi_entries": list(map(lambda x: x.data, ncbi_entries)),
        })
    except (RemoteDisconnected, URLError):
        return jsonify({
            "gn_entries": {},
            "ncbi_entries": {},
        })