import logging
import uuid
from typing import Optional

from app.core.config import Settings
from app.models.testing import (
    ChunkEntry,
    FilteredResult,
    GenerateResult,
    InputInfo,
    ResponseResult,
    RetrievalResult,
    SubQuestionChunks,
    TimingInfo,
)
from app.services.asr_client import ASRClient
from app.services.llm_client import LLMClient
from app.services.llm_client_dp import LLMClientDP
from app.services.prompt_service import PromptService
from app.services.query_decomposer import QueryDecomposer
from app.services.rag_pipeline import RAGPipeline, PipelineSnapshot
from app.services.rag import RAGService
from app.services.relevance_filter import RelevanceFilter

logger = logging.getLogger(__name__)


class TestRunnerService:
    """Runs the full RAG pipeline and captures all intermediate data for accuracy testing."""

    def __init__(self, settings: Settings):
        self.settings = settings

    async def run_text_test(
        self,
        question: str,
        profile: str,
        prompt_service: PromptService,
        label: str = "",
    ) -> GenerateResult:
        result_id = uuid.uuid4().hex[:12]

        prompt_service.activate_profile(profile)
        active_profile = prompt_service.get_active_profile_name()

        llm_client_dp = LLMClientDP(self.settings)
        llm_client = LLMClient(self.settings)
        rag = RAGService(
            llm_client=llm_client,
            settings=self.settings,
            prompt_service=prompt_service,
        )
        decomposer = QueryDecomposer(llm_client_dp, prompt_service=prompt_service)
        relevance_filter = RelevanceFilter(
            llm_client, prompt_service=prompt_service
        )

        pipeline = RAGPipeline(
            decomposer=decomposer,
            rag=rag,
            relevance_filter=relevance_filter,
            retrieval_n_results=self.settings.retrieval_n_results,
            relevance_threshold=self.settings.relevance_threshold,
        )

        # Collect all snapshots — use the last "completed" one for the final result
        decomposed_snap = None
        retrieval_snap = None
        filtering_snap = None
        completed_snap = None

        async for snap in pipeline.execute(question):
            if snap.phase == "decomposed":
                decomposed_snap = snap
            elif snap.phase == "retrieving":
                retrieval_snap = snap
            elif snap.phase == "filtering":
                filtering_snap = snap
            elif snap.phase == "completed":
                completed_snap = snap

        if completed_snap is None:
            raise RuntimeError("Pipeline did not produce a completed snapshot")

        # Build retrieval result
        retrieval_per_subq = []
        if retrieval_snap and retrieval_snap.retrieval_results:
            for sq_idx, (sub_q_text, chunks) in enumerate(
                retrieval_snap.retrieval_results
            ):
                retrieval_per_subq.append(
                    SubQuestionChunks(
                        sub_question_index=sq_idx,
                        sub_question_text=sub_q_text,
                        chunks=[
                            ChunkEntry(
                                chunk_index=i,
                                text=text,
                                metadata=meta,
                                distance=distance,
                            )
                            for i, (text, meta, distance) in enumerate(chunks)
                        ],
                    )
                )

        # Build filtered result
        filtered_per_subq = []
        if filtering_snap and filtering_snap.filtered_by_subq:
            for sq_idx, (sub_q_text, chunks) in enumerate(
                filtering_snap.filtered_by_subq
            ):
                filtered_per_subq.append(
                    SubQuestionChunks(
                        sub_question_index=sq_idx,
                        sub_question_text=sub_q_text,
                        chunks=[
                            ChunkEntry(
                                chunk_index=i,
                                text=text,
                                metadata=meta,
                                distance=0.0,
                            )
                            for i, (text, meta) in enumerate(chunks)
                        ],
                    )
                )

        # Build response result — serialize through dicts to convert between
        # query.py SubQuestionSources and testing.py SubQuestionSources (same fields)
        response_result = ResponseResult(
            final_answer=completed_snap.answer,
            sub_question_sources=[
                {
                    "sub_question_index": sq.sub_question_index,
                    "sub_question_text": sq.sub_question_text,
                    "sources": [s.model_dump() for s in sq.sources],
                }
                for sq in completed_snap.sub_question_sources
            ],
            generate_time_ms=completed_snap.generator_time_ms,
        )

        return GenerateResult(
            result_id=result_id,
            input_type="text",
            profile=active_profile,
            label=label,
            input=InputInfo(text=question),
            extracted_key_questions=completed_snap.extracted_questions,
            retrieval=RetrievalResult(
                per_sub_question=retrieval_per_subq,
                total_chunks_retrieved=(
                    retrieval_snap.chunks_retrieved_count if retrieval_snap else 0
                ),
                retriever_time_ms=(
                    retrieval_snap.retriever_time_ms if retrieval_snap else 0
                ),
            ),
            filtered=FilteredResult(
                per_sub_question=filtered_per_subq,
                total_chunks_filtered=(
                    filtering_snap.chunks_filtered_count if filtering_snap else 0
                ),
                filter_time_ms=(
                    filtering_snap.filter_time_ms if filtering_snap else 0
                ),
            ),
            response=response_result,
            timing=TimingInfo(
                decomposer_time_ms=completed_snap.decomposer_time_ms,
                retriever_time_ms=(
                    retrieval_snap.retriever_time_ms if retrieval_snap else 0
                ),
                filter_time_ms=(
                    filtering_snap.filter_time_ms if filtering_snap else 0
                ),
                generator_time_ms=completed_snap.generator_time_ms,
                total_time_ms=completed_snap.total_time_ms,
            ),
        )

    async def run_audio_test(
        self,
        audio_bytes: bytes,
        reference_transcript: str,
        profile: str,
        prompt_service: PromptService,
        language: str = "yue",
        label: str = "",
        audio_filename: str = "",
    ) -> GenerateResult:
        result_id = uuid.uuid4().hex[:12]

        # Run ASR
        asr_client = ASRClient(self.settings)
        transcribed_text = await asr_client.transcribe_full(
            audio_bytes, language=language
        )

        # Run text test on transcribed text
        result = await self.run_text_test(
            question=transcribed_text,
            profile=profile,
            prompt_service=prompt_service,
            label=label,
        )

        # Override with audio-specific fields
        result.result_id = result_id
        result.input_type = "audio"
        result.input = InputInfo(
            text=transcribed_text,
            reference_transcript=reference_transcript,
            audio_filename=audio_filename,
            audio_duration_seconds=0.0,
            asr_language=language,
        )

        return result