"""Demo ASR adapter for local voice co-creation smoke tests."""

from __future__ import annotations

from fastapi import HTTPException

from app.services.adapters.asr.models import TranscriptionOutput
from app.services.adapters.base import BaseAdapter
from app.services.adapters.registry import AdapterRegistry


@AdapterRegistry.register("asr", "demo")
class DemoASRAdapter(BaseAdapter[TranscriptionOutput]):
    """Return transcript hints or text uploads without external ASR services."""

    adapter_type = "asr"
    adapter_name = "demo"

    async def execute(
        self,
        audio_bytes: bytes,
        file_name: str | None = None,
        mime_type: str | None = None,
        transcript_hint: str | None = None,
        **kwargs,
    ) -> TranscriptionOutput:
        hint = (transcript_hint or "").strip()
        if hint:
            return TranscriptionOutput(
                transcript_text=hint,
                confidence=1.0,
                provider=self.adapter_name,
            )

        if mime_type and mime_type.startswith("text/"):
            text = audio_bytes.decode("utf-8", errors="ignore").strip()
            if text:
                return TranscriptionOutput(
                    transcript_text=text,
                    confidence=1.0,
                    provider=self.adapter_name,
                )

        raise HTTPException(
            status_code=503,
            detail=(
                "当前环境未配置真实语音转写，请先使用文本共创模式，"
                "或在开发模式下提供 transcript_hint。"
            ),
        )

    async def health_check(self) -> bool:
        return True

    @property
    def estimated_cost(self) -> float:
        return 0.0