from __future__ import annotations

import random
from typing import Any, TYPE_CHECKING

from wisent.core.contrastive_pairs.core.pair import ContrastivePair
from wisent.core.contrastive_pairs.core.response import NegativeResponse, PositiveResponse
from wisent.core.contrastive_pairs.lm_eval_pairs.atoms import LMEvalBenchmarkExtractor
from wisent.core.cli_logger import setup_logger, bind

if TYPE_CHECKING:
    from lm_eval.api.task import ConfigurableTask


__all__ = ["GalicianBenchGenerationExtractor"]
_LOG = setup_logger(__name__)

task_names = (
    "summarization_gl",
    "truthfulqa_gl_gen",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}",
    "flores_{pair}"
)
class GalicianBenchGenerationExtractor(LMEvalBenchmarkExtractor):
    """Extractor for Galician Bench generation benchmarks (FLORES translation)."""


    evaluator_name = "generation"
    def extract_contrastive_pairs(
        self,
        lm_eval_task_data: ConfigurableTask,
        limit: int | None = None,
        preferred_doc: str | None = None,
    ) -> list[ContrastivePair]:
        log = bind(_LOG, task=getattr(lm_eval_task_data, "NAME", "unknown"))
        max_items = self._normalize_limit(limit)

        docs = self.load_docs(lm_eval_task_data, max_items, preferred_doc=preferred_doc)

        pairs: list[ContrastivePair] = []
        log.info("Extracting contrastive pairs", extra={"doc_count": len(docs)})

        for doc in docs:
            pair = self._extract_pair_from_doc(doc)
            if pair is not None:
                pairs.append(pair)
                if max_items is not None and len(pairs) >= max_items:
                    break

        if not pairs:
            task_name = getattr(lm_eval_task_data, "NAME", type(lm_eval_task_data).__name__)
            log.warning("No valid Galician Bench generation pairs extracted", extra={"task": task_name})

        return pairs

    def _extract_pair_from_doc(self, doc: dict[str, Any]) -> ContrastivePair | None:
        log = bind(_LOG, doc_id=doc.get("id", "unknown"))

        try:
            source_sent = None
            target_sent = None

            for key in doc.keys():
                if key.startswith("sentence_"):
                    if source_sent is None:
                        source_sent = doc[key]
                    elif target_sent is None:
                        target_sent = doc[key]

            if not source_sent or not target_sent:
                log.debug("Skipping doc due to missing sentence fields", extra={"doc": doc})
                return None

            source_sent = str(source_sent).strip()
            target_sent = str(target_sent).strip()

            incorrect = self._create_shuffled_text(target_sent)

            formatted_question = f"Translate: {source_sent}"

            positive_response = PositiveResponse(model_response=target_sent)
            negative_response = NegativeResponse(model_response=incorrect)

            return ContrastivePair(
                prompt=formatted_question,
                positive_response=positive_response,
                negative_response=negative_response,
                label="gl_bench_translation",
            )

        except Exception as exc:
            log.error("Error extracting pair from doc", exc_info=exc, extra={"doc": doc})
            return None

    @staticmethod
    def _create_shuffled_text(text: str) -> str:
        """Create a synthetic negative response by shuffling words."""
        words = text.split()
        if len(words) > 3:
            shuffled = words.copy()
            random.shuffle(shuffled)
            return " ".join(shuffled)
        return "traducción incorrecta"
