import sys
import argparse
import datetime
from typing import List, Dict, Optional, Any, Sequence

from dynaconf import settings
from fatcat_openapi_client import ReleaseEntity, FileEntity

from fatcat_scholar.api_entities import *
from fatcat_scholar.schema import *
from fatcat_scholar.grobid2json import teixml2json


def es_fulltext_from_sim(sim: Dict[str, Any]) -> Optional[ScholarFulltext]:
    if not sim["page_texts"]:
        return None
    first_page = sim["page_texts"][0]["page_num"]
    issue_item = sim["issue_item"]
    return ScholarFulltext(
        lang_code=None,  # TODO: pub/issue metadata? or langdetect?
        body="\n".join([p["raw_text"] for p in sim["page_texts"]]),
        # acknowledgement=None,
        # annex=None,
        release_ident=sim.get("release_ident"),
        # file_ident=None,
        # file_sha1=None,
        # file_mimetype=None,
        thumbnail_url=f"https://archive.org/serve/{issue_item}/__ia_thumb.jpg",
        access_url=f"https://archive.org/details/{issue_item}/page/{first_page}",
        access_type=AccessType.ia_sim,
    )


def es_sim_from_sim(sim: Dict[str, Any]) -> ScholarSim:
    first_page = None
    if sim["page_texts"]:
        first_page = sim["page_texts"][0]["page_num"]
    return ScholarSim(
        issue_item=sim["issue_item"],
        pub_collection=sim["pub_item_metadata"]["metadata"]["identifier"],
        sim_pubid=sim["issue_item_metadata"]["metadata"]["sim_pubid"],
        first_page=first_page,
    )


SIM_RELEASE_TYPE_MAP = {
    "Scholarly Journals": "article-journal",
    "Trade Journals": "article-magazine",
    # TODO:
}
SIM_LANG_MAP = {
    "English": "en",
    "Spanish": "es",
    "German": "de",
    # TODO:
}
SIM_COUNTRY_MAP = {
    "United States": "us",
    "Germany": "de",
    "Netherlands": "nl",
    # TODO:
}


def es_biblio_from_sim(sim: Dict[str, Any]) -> ScholarBiblio:

    issue_meta = sim["issue_item_metadata"]["metadata"]
    pub_meta = sim["pub_item_metadata"]["metadata"]

    first_page = None
    if sim["page_texts"]:
        first_page = sim["page_texts"][0]["page_num"] or None
    first_page_int = clean_small_int(first_page)

    container_name = sim["pub_item_metadata"]["metadata"]["title"]

    # can't remember what this hack is for...
    last_word = container_name.split()[-1]
    if len(last_word) == 9 and last_word[4] == "-":
        container_name = container_name[:-10]

    issns = []
    raw_issn = issue_meta.get("issn")
    if raw_issn and len(raw_issn) == 9:
        issns.append(raw_issn)

    volume = issue_meta.get("volume")
    volume_int = clean_small_int(volume)
    issue = issue_meta.get("issue")
    issue_int = clean_small_int(issue)

    date = issue_meta.get("date")
    release_year = None
    if date and len(date) > 4 and date[:4].isdigit():
        release_year = int(date[:4])

    release_date = None
    if len(date) == len("2000-01-01"):
        try:
            datetime.date.fromisoformat(date)
            release_date = date
        except ValueError:
            pass

    if release_year and abs(release_year) > 2050:
        release_year = None

    return ScholarBiblio(
        # release_ident=release.ident,
        title=None,
        # subtitle=None,
        # original_title=release.original_title,
        release_date=release_date,
        release_year=release_year,
        release_type=SIM_RELEASE_TYPE_MAP.get(issue_meta.get("pub_type"))
        or SIM_RELEASE_TYPE_MAP.get(pub_meta.get("pub_type")),
        release_stage="published",  # as a default
        # withdrawn_status=release.withdrawn_status,
        lang_code=SIM_LANG_MAP.get(issue_meta.get("language"))
        or SIM_LANG_MAP.get(pub_meta.get("language")),
        country_code=SIM_COUNTRY_MAP.get(pub_meta.get("country")),
        volume=volume,
        volume_int=volume_int,
        issue=issue,
        issue_int=issue_int,
        pages=sim.get("pages"),
        first_page=first_page,
        first_page_int=first_page_int,
        # number=None,
        # no external identifiers
        # license_slug=release.license_slug,
        publisher=issue_meta.get("publisher") or pub_meta.get("publisher"),
        container_name=container_name,
        container_original_name=None,
        container_ident=None,  # TODO
        container_type=None,  # TODO
        container_issnl=None,  # TODO
        issns=issns,
        # no contrib/affiliation info
        contrib_names=[],
        affiliations=[],
    )


def _add_file_release_meta(
    fulltext: ScholarFulltext,
    pdf_meta: Optional[dict],
    re: ReleaseEntity,
    fe: FileEntity,
) -> ScholarFulltext:
    best_url = None
    best_url_type = None
    for url in fe.urls:
        best_url = url.url
        best_url_type = AccessType.web
        if "//archive.org/" in url.url:
            best_url_type = AccessType.ia_file
            break
        elif "//web.archive.org/" in url.url:
            best_url_type = AccessType.wayback
            break
        if url.rel == "repository":
            best_url_type = AccessType.repository
        # TODO: more file-to-access logic

    fulltext.release_ident = re.ident
    fulltext.file_ident = fe.ident
    fulltext.file_sha1 = fe.sha1
    fulltext.file_mimetype = fe.mimetype
    fulltext.access_url = best_url
    fulltext.access_type = best_url_type
    if pdf_meta is not None and pdf_meta["pdf_meta"].get("has_page0_thumbnail"):
        # eg: https://blobs.fatcat.wiki/thumbnail/pdf/32/29/322909fe57cef73b10a166996a4528d337026d16.180px.jpg
        fulltext.thumbnail_url = f"{ settings.THUMBNAIL_URL_PREFIX }{ fe.sha1[0:2] }/{ fe.sha1[2:4] }/{ fe.sha1 }.180px.jpg"
    return fulltext


def es_fulltext_from_grobid(
    tei_dict: dict, pdf_meta: Optional[dict], re: ReleaseEntity, fe: FileEntity
) -> Optional[ScholarFulltext]:
    if not tei_dict.get("body"):
        return None
    ret = ScholarFulltext(
        lang_code=tei_dict.get("lang"),
        body=tei_dict.get("body"),
        acknowledgement=tei_dict.get("acknowledgement"),
        annex=tei_dict.get("annex"),
    )
    return _add_file_release_meta(ret, pdf_meta, re, fe)


def es_fulltext_from_pdftotext(
    raw_text: str, pdf_meta: Optional[dict], re: ReleaseEntity, fe: FileEntity
) -> Optional[ScholarFulltext]:

    ret = ScholarFulltext(
        lang_code=re.language, body=raw_text, acknowledgement=None, annex=None,
    )
    return _add_file_release_meta(ret, pdf_meta, re, fe)


def biblio_metadata_hacks(biblio: ScholarBiblio) -> ScholarBiblio:  # noqa: C901
    """
    This function does platform/publisher specific metadata hacks.

    Really these should be updated in the fatcat catalog directly, but in the
    short term want to work around some large-ish transforms for our prototype
    index.

    This function is long, but simple in structure, so not likely to refactor
    into smaller functions.
    """

    # valid year
    if biblio.release_year and biblio.release_year > 2025:
        biblio.release_year = None
        biblio.release_date = None

    # figshare
    if biblio.doi_prefix in ("10.6084", "10.25384"):
        if not biblio.container_name:
            biblio.container_name = "Figshare"

    # zenodo
    if biblio.doi_prefix == "10.5281":
        if not biblio.container_name:
            biblio.container_name = "Zenodo"

    # biorxiv/medrxiv
    # NOTE: there is a further hack that determines which of biorxiv/medrxiv
    # based on access URL
    if biblio.doi_prefix == "10.1101":
        if not biblio.container_name:
            biblio.container_name = "biorxiv/medrxiv"
        if not biblio.release_stage:
            biblio.release_stage = "submitted"
        if biblio.release_type == "post":
            biblio.release_type = "article"

    # arxiv
    if biblio.arxiv_id and not (biblio.doi or biblio.pmid):
        if not biblio.container_name:
            biblio.container_name = "arXiv"
        if biblio.release_type in (None, "report", "post"):
            biblio.release_type = "article"

    # IEEE
    if biblio.doi_prefix == "10.1109":
        if (
            not biblio.release_stage
            and biblio.container_name
            and (
                "IEEE" in biblio.container_name
                or "Conference" in biblio.container_name
                or "Proceedings" in biblio.container_name
                or biblio.release_type == "paper-conference"
            )
        ):
            biblio.release_stage = "published"

    # ACM
    if biblio.doi_prefix == "10.1145":
        if (
            not biblio.release_stage
            and biblio.container_name
            and (
                "ACM" in biblio.container_name
                or "Conference" in biblio.container_name
                or "Proceedings" in biblio.container_name
            )
        ):
            biblio.release_stage = "published"

    # IOP, ACM, IEEE, AIP, World Scientific (large conference publishers)
    if biblio.doi_prefix in ("10.1145", "10.1109", "10.1117", "10.1063", "10.1142"):
        if not biblio.release_stage and biblio.release_type == "paper-conference":
            biblio.release_stage = "published"

    # F1000
    if biblio.doi_prefix == "10.3510":
        if biblio.title and biblio.title.startswith("Faculty of 1000 evaluation for"):
            biblio.release_type = "peer_review"
            biblio.release_stage = "published"

    # protocols.io
    if biblio.doi_prefix == "10.17504":
        if not biblio.release_stage:
            biblio.release_stage = "published"

    return biblio


def transform_heavy(heavy: IntermediateBundle) -> Optional[ScholarDoc]:

    tags: List[str] = []
    work_ident: Optional[str] = None
    sim_issue: Optional[str] = None
    abstracts: List[ScholarAbstract] = []
    fulltext: Optional[ScholarFulltext] = None
    primary_release: Optional[ReleaseEntity] = None

    ia_sim: Optional[ScholarSim] = None
    if heavy.sim_fulltext is not None:
        ia_sim = es_sim_from_sim(heavy.sim_fulltext)
        fulltext = es_fulltext_from_sim(heavy.sim_fulltext)

    if heavy.doc_type == DocType.sim_page:
        assert ia_sim is not None
        assert heavy.sim_fulltext is not None
        if not ia_sim.first_page or not ia_sim.issue_item:
            # can't create a valid key if we don't have these fields, so shouldn't index
            return None
        key = f"page_{ia_sim.issue_item}_{ia_sim.first_page}"
        sim_issue = ia_sim.issue_item
        biblio = es_biblio_from_sim(heavy.sim_fulltext)
        # fulltext extracted from heavy.sim_fulltext above
    elif heavy.doc_type == DocType.work:
        work_ident = heavy.releases[0].work_id
        key = f"work_{work_ident}"
        assert heavy.biblio_release_ident
        primary_release = [
            r for r in heavy.releases if r.ident == heavy.biblio_release_ident
        ][0]
        biblio = es_biblio_from_release(primary_release)
        biblio = biblio_metadata_hacks(biblio)
        abstracts = es_abstracts_from_release(primary_release)

        # if no abstract from primary_release, try all the other releases
        for release in heavy.releases:
            if not abstracts:
                abstracts = es_abstracts_from_release(release)
    else:
        raise NotImplementedError(f"doc_type: {heavy.doc_type}")

    if heavy.grobid_fulltext:
        fulltext_release = [
            r
            for r in heavy.releases
            if r.ident == heavy.grobid_fulltext["release_ident"]
        ][0]
        fulltext_file = [
            f
            for f in fulltext_release.files
            if f.ident == heavy.grobid_fulltext["file_ident"]
        ][0]
        tei_dict = teixml2json(heavy.grobid_fulltext["tei_xml"])
        fulltext = es_fulltext_from_grobid(
            tei_dict, heavy.pdf_meta, fulltext_release, fulltext_file
        )
        if not abstracts:
            abstracts = es_abstracts_from_grobid(tei_dict)

    if not fulltext and heavy.pdftotext_fulltext:
        fulltext_release = [
            r
            for r in heavy.releases
            if r.ident == heavy.pdftotext_fulltext["release_ident"]
        ][0]
        fulltext_file = [
            f
            for f in fulltext_release.files
            if f.ident == heavy.pdftotext_fulltext["file_ident"]
        ][0]
        fulltext = es_fulltext_from_pdftotext(
            heavy.pdftotext_fulltext["raw_text"],
            heavy.pdf_meta,
            fulltext_release,
            fulltext_file,
        )

    # TODO: additional access list
    access_dict = dict()
    if fulltext and fulltext.access_type:
        access_dict[fulltext.access_type] = ScholarAccess(
            access_type=fulltext.access_type,
            access_url=fulltext.access_url,
            mimetype=fulltext.file_mimetype,
            file_ident=fulltext.file_ident,
            release_ident=fulltext.release_ident,
        )
    if ia_sim and not AccessType.ia_sim in access_dict:
        access_dict[AccessType.ia_sim] = ScholarAccess(
            access_type=AccessType.ia_sim,
            access_url=f"https://archive.org/details/{ia_sim.issue_item}/page/{ia_sim.first_page}",
        )

    # TODO: additional abstracts

    # tags
    if biblio.license_slug and biblio.license_slug.lower().startswith("cc-"):
        tags.append("oa")
    if primary_release and primary_release.container:
        container = primary_release.container
        if container.extra:
            if container.extra.get("doaj"):
                tags.append("doaj")
                tags.append("oa")
            if container.extra.get("road"):
                tags.append("road")
                tags.append("oa")
            if container.extra.get("szczepanski"):
                tags.append("szczepanski")
                tags.append("oa")
            if container.extra.get("ia", {}).get("longtail_oa"):
                tags.append("longtail")
                tags.append("oa")
            if container.extra.get("sherpa_romeo", {}).get("color") == "white":
                tags.append("oa")
            if container.extra.get("default_license", "").lower().startswith("cc-"):
                tags.append("oa")
            if container.extra.get("platform"):
                # scielo, ojs, wordpress, etc
                tags.append(container.extra["platform"].lower())
    if biblio.doi_prefix == "10.2307":
        tags.append("jstor")
    tags = list(set(tags))

    # biorxiv/medrxiv hacks
    if (
        biblio.doi_prefix == "10.1101"
        and biblio.container_name in (None, "biorxiv/medrxiv")
        and biblio.release_stage != "published"
    ):
        for _, acc in access_dict.items():
            if "://www.medrxiv.org/" in acc.access_url:
                biblio.container_name = "medRxiv"
                if biblio.release_stage == None:
                    biblio.release_stage = "submitted"
            elif "://www.biorxiv.org/" in acc.access_url:
                biblio.container_name = "bioRxiv"
                if biblio.release_stage == None:
                    biblio.release_stage = "submitted"

    return ScholarDoc(
        key=key,
        collapse_key=sim_issue or work_ident,
        doc_type=heavy.doc_type.value,
        doc_index_ts=datetime.datetime.utcnow(),
        work_ident=work_ident,
        tags=tags,
        biblio=biblio,
        fulltext=fulltext,
        ia_sim=ia_sim,
        abstracts=abstracts,
        releases=[es_release_from_release(r) for r in heavy.releases],
        access=list(access_dict.values()),
    )


def refs_from_grobid(release: ReleaseEntity, tei_dict: dict) -> Sequence[RefStructured]:
    output = []
    for ref in tei_dict.get("citations") or []:
        ref_date = ref.get("date") or None
        ref_year: Optional[int] = None
        if ref_date and len(ref_date) > 4 and ref_date[:4].isdigit():
            ref_year = int(ref_date[:4])
        authors = ref.get("authors") or []
        authors = [a for a in authors if type(a) == str]
        output.append(
            RefStructured(
                biblio=RefBiblio(
                    unstructured=ref.get("unstructured"),
                    title=ref.get("title"),
                    # subtitle
                    contrib_raw_names=authors or None,
                    year=ref_year,
                    container_name=ref.get("journal"),
                    publisher=ref.get("publisher"),
                    volume=ref.get("volume"),
                    issue=ref.get("issue"),
                    pages=ref.get("pages"),
                    doi=ref.get("doi"),
                    pmid=ref.get("pmid"),
                    pmcid=ref.get("pmcid"),
                    arxiv_id=ref.get("arxiv_id"),
                    # isbn13: Optional[str]
                    url=clean_url_conservative(ref.get("url")),
                ),
                release_ident=release.ident,
                work_ident=release.work_id,
                release_year=release.release_year,
                index=ref.get("index"),
                key=ref.get("id"),
                locator=None,
                # target_release_id
                ref_source="grobid",
            )
        )
    return output


def refs_from_release_refs(release: ReleaseEntity) -> Sequence[RefStructured]:
    output = []
    for ref in release.refs:
        ref_source = "fatcat"
        if release.extra and release.extra.get("pubmed"):
            ref_source = "pubmed"
        elif release.extra and release.extra.get("crossref"):
            ref_source = "crossref"
        elif release.extra and release.extra.get("datacite"):
            ref_source = "datacite"
        extra = ref.extra or dict()
        authors = extra.get("authors") or []
        authors = [a for a in authors if type(a) == str]
        output.append(
            RefStructured(
                biblio=RefBiblio(
                    unstructured=extra.get("unstructured"),
                    title=ref.title,
                    subtitle=extra.get("subtitle"),
                    contrib_raw_names=authors or None,
                    year=ref.year,
                    container_name=ref.container_name,
                    publisher=extra.get("publisher"),
                    volume=extra.get("volume"),
                    issue=extra.get("issue"),
                    pages=extra.get("pages"),
                    doi=extra.get("doi"),
                    pmid=extra.get("pmid"),
                    pmcid=extra.get("pmcid"),
                    arxiv_id=extra.get("arxiv_id"),
                    isbn13=extra.get("isbn13"),
                    url=clean_url_conservative(extra.get("url")),
                ),
                release_ident=release.ident,
                work_ident=release.work_id,
                release_year=release.release_year,
                index=ref.index,
                key=ref.key,
                locator=ref.locator,
                target_release_id=ref.target_release_id,
                ref_source=ref_source,
            )
        )
    return output


def refs_from_heavy(heavy: IntermediateBundle) -> Sequence[RefStructured]:
    """
    Current behavior is to return *both* fatcat refs and GROBID refs if
    available.
    """

    if heavy.doc_type != DocType.work:
        return []

    # first, identify source of refs: fatcat release metadata or GROBID
    assert heavy.biblio_release_ident
    primary_release = [
        r for r in heavy.releases if r.ident == heavy.biblio_release_ident
    ][0]

    refs: List[RefStructured] = []

    if primary_release.refs:
        # TODO: what about other releases?
        refs.extend(refs_from_release_refs(primary_release))

    if heavy.grobid_fulltext:
        fulltext_release = [
            r
            for r in heavy.releases
            if r.ident == heavy.grobid_fulltext["release_ident"]
        ][0]
        tei_dict = teixml2json(heavy.grobid_fulltext["tei_xml"])
        refs.extend(refs_from_grobid(fulltext_release, tei_dict))

    return refs


def run_transform(infile: Sequence) -> None:
    for line in infile:
        obj = json.loads(line)

        heavy = IntermediateBundle(
            doc_type=DocType(obj["doc_type"]),
            releases=[
                entity_from_json(json.dumps(re), ReleaseEntity)
                for re in obj["releases"]
            ],
            biblio_release_ident=obj.get("biblio_release_ident"),
            grobid_fulltext=obj.get("grobid_fulltext"),
            pdftotext_fulltext=obj.get("pdftotext_fulltext"),
            pdf_meta=obj.get("pdf_meta"),
            sim_fulltext=obj.get("sim_fulltext"),
        )
        es_doc = transform_heavy(heavy)
        if not es_doc:
            continue
        print(es_doc.json(exclude_none=True, sort_keys=True))


def run_refs(infile: Sequence) -> None:
    for line in infile:
        obj = json.loads(line)

        heavy = IntermediateBundle(
            doc_type=DocType(obj["doc_type"]),
            releases=[
                entity_from_json(json.dumps(re), ReleaseEntity)
                for re in obj["releases"]
            ],
            biblio_release_ident=obj.get("biblio_release_ident"),
            grobid_fulltext=obj.get("grobid_fulltext"),
            pdftotext_fulltext=obj.get("pdftotext_fulltext"),
            pdf_meta=obj.get("pdf_meta"),
            sim_fulltext=obj.get("sim_fulltext"),
        )
        refs = refs_from_heavy(heavy)
        for ref in refs:
            print(ref.json(exclude_none=True, sort_keys=True))


def main() -> None:
    """
    Run this command like:

        python -m fatcat_scholar.transform
    """

    parser = argparse.ArgumentParser(
        formatter_class=argparse.ArgumentDefaultsHelpFormatter
    )
    subparsers = parser.add_subparsers()

    sub = subparsers.add_parser(
        "run_transform",
        help="takes 'heavy' intermediate, outputs scholar_fulltext ES documents",
    )
    sub.set_defaults(func="run_transform")
    sub.add_argument(
        "json_file",
        help="intermediate globs as JSON-lines",
        nargs="?",
        default=sys.stdin,
        type=argparse.FileType("r"),
    )

    sub = subparsers.add_parser(
        "run_refs", help="extracts references from 'heavy' intermediate"
    )
    sub.set_defaults(func="run_refs")
    sub.add_argument(
        "json_file",
        help="intermediate globs as JSON-lines",
        nargs="?",
        default=sys.stdin,
        type=argparse.FileType("r"),
    )

    args = parser.parse_args()
    if not args.__dict__.get("func"):
        print("tell me what to do! (try --help)")
        sys.exit(-1)

    if args.func == "run_transform":
        run_transform(infile=args.json_file)
    elif args.func == "run_refs":
        run_refs(infile=args.json_file)
    else:
        raise NotImplementedError(args.func)


if __name__ == "__main__":
    main()