import json
import logging
from collections import defaultdict
from typing import Dict, List, Optional, Union

from annotation_utils import labeled_span_to_id
from pytorch_ie.annotations import BinaryRelation, LabeledSpan
from pytorch_ie.documents import TextDocumentWithLabeledSpansBinaryRelationsAndLabeledPartitions
from rendering_utils_displacy import EntityRenderer

logger = logging.getLogger(__name__)

# adjusted from rendering_utils_displacy.TPL_ENT
TPL_ENT_WITH_ID = """
<mark class="entity" id="{id}" style="background: {bg}; padding: 0.45em 0.6em; margin: 0 0.25em; line-height: 1; border-radius: 0.35em;">
    {text}
    <span style="font-size: 0.8em; font-weight: bold; line-height: 1; border-radius: 0.35em; text-transform: uppercase; vertical-align: middle; margin-left: 0.5rem">{label}</span>
</mark>
"""


def render_pretty_table(
    document: TextDocumentWithLabeledSpansBinaryRelationsAndLabeledPartitions, **render_kwargs
):
    from prettytable import PrettyTable

    t = PrettyTable()
    t.field_names = ["head", "tail", "relation"]
    t.align = "l"
    for relation in list(document.binary_relations) + list(document.binary_relations.predictions):
        t.add_row([str(relation.head), str(relation.tail), relation.label])

    html = t.get_html_string(format=True)
    html = "<div style='max-width:100%; max-height:360px; overflow:auto'>" + html + "</div>"

    return html


def render_displacy(
    document: TextDocumentWithLabeledSpansBinaryRelationsAndLabeledPartitions,
    inject_relations=True,
    colors_hover=None,
    entity_options={},
    **render_kwargs,
):

    labeled_spans = list(document.labeled_spans) + list(document.labeled_spans.predictions)
    spacy_doc = {
        "text": document.text,
        "ents": [
            {
                "start": labeled_span.start,
                "end": labeled_span.end,
                "label": labeled_span.label,
                # pass the ID as a parameter to the entity. The id is required to fetch the entity annotations
                # on hover and to inject the relation data.
                "params": {"id": labeled_span_to_id(labeled_span)},
            }
            for labeled_span in labeled_spans
        ],
        "title": None,
    }

    # copy to avoid modifying the original options
    entity_options = entity_options.copy()
    # use the custom template with the entity ID
    entity_options["template"] = TPL_ENT_WITH_ID
    renderer = EntityRenderer(options=entity_options)
    html = renderer.render([spacy_doc], page=True, minify=True).strip()

    html = "<div style='max-width:100%; max-height:360px; overflow:auto'>" + html + "</div>"
    if inject_relations:
        binary_relations = list(document.binary_relations) + list(
            document.binary_relations.predictions
        )
        html = inject_relation_data(
            html,
            labeled_spans=labeled_spans,
            binary_relations=binary_relations,
            additional_colors=colors_hover,
        )
    return html


def inject_relation_data(
    html: str,
    labeled_spans: List[LabeledSpan],
    binary_relations: List[BinaryRelation],
    additional_colors: Optional[Dict[str, Union[str, dict]]] = None,
) -> str:
    from bs4 import BeautifulSoup

    # Parse the HTML using BeautifulSoup
    soup = BeautifulSoup(html, "html.parser")

    entity2tails = defaultdict(list)
    entity2heads = defaultdict(list)
    for relation in binary_relations:
        entity2heads[relation.tail].append((relation.head, relation.label))
        entity2tails[relation.head].append((relation.tail, relation.label))

    ann_id2annotation = {labeled_span_to_id(entity): entity for entity in labeled_spans}
    # Add unique IDs to each entity
    entities = soup.find_all(class_="entity")
    for entity in entities:
        original_color = entity["style"].split("background:")[1].split(";")[0].strip()
        entity["data-color-original"] = original_color
        if additional_colors is not None:
            for key, color in additional_colors.items():
                entity[f"data-color-{key}"] = (
                    json.dumps(color) if isinstance(color, dict) else color
                )
        entity_annotation = ann_id2annotation[entity["id"]]
        # sanity check.
        annotation_text_without_newline = str(entity_annotation).replace("\n", "")
        # Just check the start, because the text has the label attached to the end
        if not entity.text.startswith(annotation_text_without_newline):
            logger.warning(f"Entity text mismatch: {entity_annotation} != {entity.text}")
        entity["data-label"] = entity_annotation.label
        entity["data-relation-tails"] = json.dumps(
            [
                {"entity-id": labeled_span_to_id(tail), "label": label}
                for tail, label in entity2tails.get(entity_annotation, [])
            ]
        )
        entity["data-relation-heads"] = json.dumps(
            [
                {"entity-id": labeled_span_to_id(head), "label": label}
                for head, label in entity2heads.get(entity_annotation, [])
            ]
        )

    # Return the modified HTML as a string
    return str(soup)