"""统一语音确认的「审计 + trace + 抛错」三段式。

`VoiceConfirmationService` 过去在 `resolve_from_wav` / `resolve_from_recognized_text` 各分支
中重复执行 `_persist_audit + record_voice_trace + emit_voice_event + raise
SurgeryPipelineError` 三件套，本类把它们聚合成一个方法，便于线性化主流程。
"""

from __future__ import annotations

from dataclasses import dataclass
from typing import Literal

from loguru import logger
from sqlalchemy.ext.asyncio import async_sessionmaker

from app.config import Settings
from app.repositories.voice_audits import VoiceAuditRepository
from app.services.voice_file_log import emit_voice_event
from app.surgery_errors import SurgeryPipelineError

VoiceSource = Literal["wav", "text", "n/a"]


@dataclass(frozen=True)
class VoiceAuditContext:
    """审计所需的「音频侧」上下文快照。"""

    audio_object_key: str | None = None
    audio_content_type: str | None = None
    audio_size_bytes: int | None = None
    audio_sha256: str | None = None


class VoiceAuditEmitter:
    def __init__(
        self,
        *,
        settings: Settings,
        audits: VoiceAuditRepository,
        session_factory: async_sessionmaker,
    ) -> None:
        self._s = settings
        self._audits = audits
        self._session_factory = session_factory

    async def _persist_audit(
        self,
        *,
        surgery_id: str,
        confirmation_id: str,
        status: str,
        ctx: VoiceAuditContext,
        asr_text: str | None,
        resolved_label: str | None,
        options_snapshot_json: str | None,
        error_message: str | None,
    ) -> None:
        try:
            async with self._session_factory() as session:
                async with session.begin():
                    await self._audits.save_audit(
                        session,
                        surgery_id=surgery_id,
                        confirmation_id=confirmation_id,
                        status=status,
                        audio_object_key=ctx.audio_object_key,
                        audio_content_type=ctx.audio_content_type,
                        audio_size_bytes=ctx.audio_size_bytes,
                        audio_sha256=ctx.audio_sha256,
                        asr_text=asr_text,
                        resolved_label=resolved_label,
                        options_snapshot_json=options_snapshot_json,
                        error_message=error_message,
                    )
        except Exception as exc:
            logger.error("Persist voice audit failed: {}", exc)

    async def fail(
        self,
        *,
        source: VoiceSource,
        status: str,
        code: str,
        message: str,
        surgery_id: str,
        confirmation_id: str,
        ctx: VoiceAuditContext | None = None,
        asr_text: str | None = None,
        options_snapshot_json: str | None = None,
        record_session_trace: bool = True,
        session_trace_recorder=None,  # Callable[[str | None, str | None], None]
        include_extra: dict[str, object] | None = None,
        persist_audit: bool = True,
        emit_trace: bool = True,
    ) -> SurgeryPipelineError:
        """统一失败路径：audit + trace + session trace + 返回待抛错。

        调用方使用 `raise await emitter.fail(...)` 完成抛出。
        """
        ctx = ctx or VoiceAuditContext()
        if persist_audit:
            await self._persist_audit(
                surgery_id=surgery_id,
                confirmation_id=confirmation_id,
                status=status,
                ctx=ctx,
                asr_text=asr_text,
                resolved_label=None,
                options_snapshot_json=options_snapshot_json,
                error_message=message,
            )
        if record_session_trace and session_trace_recorder is not None:
            try:
                session_trace_recorder(asr_text, message)
            except Exception as exc:
                logger.debug("session trace recorder failed: {}", exc)
        if emit_trace:
            emit_voice_event(
                self._s,
                surgery_id=surgery_id,
                source=source,
                status=status,
                confirmation_id=confirmation_id,
                asr_text=asr_text,
                error_message=message,
                audio_object_key=ctx.audio_object_key,
            )
        if include_extra is not None:
            return SurgeryPipelineError(code, message, extra=include_extra)
        return SurgeryPipelineError(code, message)

    async def success(
        self,
        *,
        source: VoiceSource,
        status: str,
        surgery_id: str,
        confirmation_id: str,
        ctx: VoiceAuditContext | None = None,
        asr_text: str | None,
        resolved_label: str | None,
        rejected: bool,
        options_snapshot_json: str | None,
    ) -> None:
        ctx = ctx or VoiceAuditContext()
        await self._persist_audit(
            surgery_id=surgery_id,
            confirmation_id=confirmation_id,
            status=status,
            ctx=ctx,
            asr_text=asr_text,
            resolved_label=resolved_label,
            options_snapshot_json=options_snapshot_json,
            error_message=None,
        )
        emit_voice_event(
            self._s,
            surgery_id=surgery_id,
            source=source,
            status=status,
            confirmation_id=confirmation_id,
            asr_text=asr_text,
            resolved_label=resolved_label,
            rejected=rejected,
            audio_object_key=ctx.audio_object_key,
        )