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from typing import Any, Dict, List, Optional

import fatcat_openapi_client
from fatcat_openapi_client import ApiClient, FileEntity

from .common import SANE_MAX_RELEASES, SANE_MAX_URLS, EntityImporter, b32_hex, make_rel_url

ARABESQUE_MATCH_WHERE_CLAUSE = "WHERE hit = 1 AND identifier IS NOT NULL"


class ArabesqueMatchImporter(EntityImporter):
    """
    Importer for arabesque crawl report .sqlite files, which contain
    file/identifier matches based on URL/identifier seedlists.

    Uses a SQL query to iterate through table looking for rows with:

    - GROBID status 200
    - known SHA-1 (base32 format)
    - known timestamp

    Looks up release (by identifier) and file (by SHA-1). If no release exists,
    bail.

    If no file exists, create one from metadata (using both direct and wayback
    URLs), link to release, and insert.

    If file exists, optionally update it:

    - if no release match, match to the release
    - if new URL not included, add it (and wayback)

    Config options:
    - default URL rel
    - crawl id (for editgroup metadata)
    - identifier type

    TODO:
    - a mode to insert bare files even if identifier not known?
    """

    def __init__(
        self, api: ApiClient, extid_type: str, require_grobid: bool = True, **kwargs
    ) -> None:

        eg_desc = (
            kwargs.get("editgroup_description", None)
            or "Match web crawl files to releases based on identifier/URL seedlist"
        )
        eg_extra = kwargs.get("editgroup_extra", dict())
        eg_extra["agent"] = eg_extra.get("agent", "fatcat_tools.ArabesqueMatchImporter")
        if kwargs.get("crawl_id"):
            eg_extra["crawl_id"] = kwargs.get("crawl_id")
        kwargs["do_updates"] = kwargs.get("do_updates", False)
        super().__init__(api, editgroup_description=eg_desc, editgroup_extra=eg_extra, **kwargs)
        assert extid_type in ("doi", "pmcid", "pmid")
        self.extid_type = extid_type
        self.default_link_rel = kwargs.get("default_link_rel", "web")
        assert self.default_link_rel
        self.default_mimetype = kwargs.get("default_mimetype", None)
        self.require_grobid = require_grobid
        if self.require_grobid:
            print("Requiring GROBID status == 200")
        else:
            print("NOT checking GROBID status column")

    def want(self, row: Any) -> bool:
        if self.require_grobid and not row["postproc_status"] == "200":
            return False
        if (
            bool(row["hit"]) is True
            and row["final_sha1"]
            and row["final_timestamp"]
            and row["final_timestamp"] != "-"
            and len(row["final_timestamp"]) == 14
            and row["final_mimetype"]
            and bool(row["hit"]) is True
            and row["identifier"]
        ):
            return True
        else:
            return False

    def parse_record(self, row: Dict[str, Any]) -> Optional[FileEntity]:

        extid = row["identifier"].strip()

        # check/cleanup DOI
        if self.extid_type == "doi":
            extid = extid.lower()
            extid.replace("http://doi.org/", "")
            extid.replace("https://doi.org/", "")
            if extid.startswith("doi:"):
                extid = extid[4:]
            if not extid.startswith("10."):
                self.counts["skip-extid-invalid"]
                return None

        # lookup extid
        try:
            re = self.api.lookup_release(**{self.extid_type: extid})
        except fatcat_openapi_client.rest.ApiException as err:
            if err.status == 404:
                # bail on 404 (release not in DB)
                self.counts["skip-extid-not-found"] += 1
                return None
            elif err.status == 400:
                self.counts["skip-extid-invalid"] += 1
                return None
            else:
                raise err

        url = make_rel_url(row["final_url"], self.default_link_rel)
        if not url:
            self.counts["skip-url"] += 1
            return None
        if not row["final_timestamp"]:
            self.counts["skip-missing-timestamp"] += 1
            return None
        wayback = "https://web.archive.org/web/{}/{}".format(
            row["final_timestamp"], row["final_url"]
        )
        urls = [url, ("webarchive", wayback)]

        urls = [fatcat_openapi_client.FileUrl(rel=rel, url=url) for (rel, url) in urls]

        if len(urls) > SANE_MAX_URLS:
            self.counts["skip-too-many-url"] += 1
            return None

        fe = fatcat_openapi_client.FileEntity(
            sha1=b32_hex(row["final_sha1"]),
            mimetype=row["final_mimetype"] or self.default_mimetype,
            release_ids=[re.ident],
            urls=urls,
        )
        return fe

    def try_update(self, fe: FileEntity) -> bool:
        # lookup sha1, or create new entity
        existing = None
        try:
            existing = self.api.lookup_file(sha1=fe.sha1)
        except fatcat_openapi_client.rest.ApiException as err:
            if err.status != 404:
                raise err

        if not existing:
            return True

        if (fe.release_ids[0] in existing.release_ids) and existing.urls:
            # TODO: could still, in theory update with the new URL?
            self.counts["exists"] += 1
            return False

        if not self.do_updates:
            self.counts["skip-update-disabled"] += 1
            return False

        if existing.ident in [e.ident for e in self._edits_inflight]:
            self.counts["skip-update-inflight"] += 1
            return False

        # TODO: this code path never gets hit because of the check above
        if set(fe.release_ids) == set(existing.release_ids):
            existing_urls = set([u.url for u in existing.urls])
            new_urls = set([u.url for u in fe.urls])
            if existing_urls.issuperset(new_urls):
                self.counts["skip-update-nothing-new"] += 1
                return False

        # merge the existing into this one and update
        existing.urls = list(set([(u.rel, u.url) for u in fe.urls + existing.urls]))
        existing.urls = [
            fatcat_openapi_client.FileUrl(rel=rel, url=url) for (rel, url) in existing.urls
        ]
        if len(existing.urls) > SANE_MAX_URLS:
            self.counts["skip-update-too-many-url"] += 1
            return False
        existing.release_ids = list(set(fe.release_ids + existing.release_ids))
        if len(existing.release_ids) > SANE_MAX_RELEASES:
            self.counts["skip-update-too-many-url"] += 1
            return False
        existing.mimetype = existing.mimetype or fe.mimetype
        edit = self.api.update_file(self.get_editgroup_id(), existing.ident, existing)
        self._edits_inflight.append(edit)
        self.counts["update"] += 1
        return False

    def insert_batch(self, batch: List[FileEntity]) -> None:
        self.api.create_file_auto_batch(
            fatcat_openapi_client.FileAutoBatch(
                editgroup=fatcat_openapi_client.Editgroup(
                    description=self.editgroup_description, extra=self.editgroup_extra
                ),
                entity_list=batch,
            )
        )