import contextlib
import logging
import time

import click
from sqlalchemy import select
from werkzeug.exceptions import NotFound

from core.db.session_factory import session_factory
from core.indexing_runner import DocumentIsPausedError, IndexingRunner
from events.document_index_event import document_index_created
from libs.datetime_utils import naive_utc_now
from models.dataset import Document
from models.enums import IndexingStatus

logger = logging.getLogger(__name__)


@document_index_created.connect
def handle(sender, **kwargs):
    dataset_id = sender
    document_ids = kwargs.get("document_ids", [])
    documents = []
    start_at = time.perf_counter()
    with session_factory.create_session() as session:
        for document_id in document_ids:
            logger.info(click.style(f"Start process document: {document_id}", fg="green"))

            document = session.scalar(
                select(Document).where(
                    Document.id == document_id,
                    Document.dataset_id == dataset_id,
                )
            )

            if not document:
                raise NotFound("Document not found")

            document.indexing_status = IndexingStatus.PARSING
            document.processing_started_at = naive_utc_now()
            documents.append(document)
            session.add(document)
        session.commit()

    with contextlib.suppress(Exception):
        try:
            indexing_runner = IndexingRunner()
            indexing_runner.run(documents)
            end_at = time.perf_counter()
            logger.info(click.style(f"Processed dataset: {dataset_id} latency: {end_at - start_at}", fg="green"))
        except DocumentIsPausedError as ex:
            logger.info(click.style(str(ex), fg="yellow"))