sdb2-backend/app/api/v1/tts.py

"""TTS API endpoints."""

from typing import Annotated, Any

from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel, Field
from sqlmodel.ext.asyncio.session import AsyncSession

from app.core.database import get_db
from app.core.dependencies import get_current_active_user_flexible
from app.models.user import User
from app.services.tts import TTSService


router = APIRouter(prefix="/tts", tags=["tts"])


class TTSGenerateRequest(BaseModel):
    """TTS generation request model."""

    text: str = Field(..., min_length=1, max_length=1000, description="Text to convert to speech")
    provider: str = Field(default="gtts", description="TTS provider to use")
    options: dict[str, Any] = Field(default_factory=dict, description="Provider-specific options")


class TTSResponse(BaseModel):
    """TTS generation response model."""

    id: int
    text: str
    provider: str
    options: dict[str, Any]
    sound_id: int | None
    user_id: int
    created_at: str


class ProviderInfo(BaseModel):
    """Provider information model."""

    name: str
    file_extension: str
    supported_languages: list[str]
    option_schema: dict[str, Any]


async def get_tts_service(
    session: Annotated[AsyncSession, Depends(get_db)],
) -> TTSService:
    """Get the TTS service."""
    return TTSService(session)


@router.post("")
async def generate_tts(
    request: TTSGenerateRequest,
    current_user: Annotated[User, Depends(get_current_active_user_flexible)],
    tts_service: Annotated[TTSService, Depends(get_tts_service)],
) -> dict[str, Any]:
    """Generate TTS audio and create sound."""
    try:
        if current_user.id is None:
            raise HTTPException(
                status_code=status.HTTP_401_UNAUTHORIZED,
                detail="User ID not available",
            )

        result = await tts_service.create_tts_request(
            text=request.text,
            user_id=current_user.id,
            provider=request.provider,
            **request.options
        )

        tts_record = result["tts"]

        return {
            "message": result["message"],
            "tts": TTSResponse(
                id=tts_record.id,
                text=tts_record.text,
                provider=tts_record.provider,
                options=tts_record.options,
                sound_id=tts_record.sound_id,
                user_id=tts_record.user_id,
                created_at=tts_record.created_at.isoformat(),
            )
        }

    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=str(e),
        ) from e
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"Failed to generate TTS: {e!s}",
        ) from e


@router.get("/providers")
async def get_providers(
    tts_service: Annotated[TTSService, Depends(get_tts_service)],
) -> dict[str, ProviderInfo]:
    """Get all available TTS providers."""
    providers = tts_service.get_providers()
    result = {}

    for name, provider in providers.items():
        result[name] = ProviderInfo(
            name=provider.name,
            file_extension=provider.file_extension,
            supported_languages=provider.get_supported_languages(),
            option_schema=provider.get_option_schema(),
        )

    return result


@router.get("/providers/{provider_name}")
async def get_provider(
    provider_name: str,
    tts_service: Annotated[TTSService, Depends(get_tts_service)],
) -> ProviderInfo:
    """Get information about a specific TTS provider."""
    provider = tts_service.get_provider(provider_name)

    if not provider:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Provider '{provider_name}' not found",
        )

    return ProviderInfo(
        name=provider.name,
        file_extension=provider.file_extension,
        supported_languages=provider.get_supported_languages(),
        option_schema=provider.get_option_schema(),
    )


@router.get("")
async def get_tts_list(
    current_user: Annotated[User, Depends(get_current_active_user_flexible)],
    tts_service: Annotated[TTSService, Depends(get_tts_service)],
    limit: int = 50,
    offset: int = 0,
) -> list[TTSResponse]:
    """Get TTS generation history for the current user."""
    try:
        if current_user.id is None:
            raise HTTPException(
                status_code=status.HTTP_401_UNAUTHORIZED,
                detail="User ID not available",
            )

        tts_records = await tts_service.get_user_tts_history(
            user_id=current_user.id,
            limit=limit,
            offset=offset,
        )

        return [
            TTSResponse(
                id=tts.id,
                text=tts.text,
                provider=tts.provider,
                options=tts.options,
                sound_id=tts.sound_id,
                user_id=tts.user_id,
                created_at=tts.created_at.isoformat(),
            )
            for tts in tts_records
        ]

    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"Failed to get TTS history: {e!s}",
        ) from e


@router.delete("/{tts_id}")
async def delete_tts(
    tts_id: int,
    current_user: Annotated[User, Depends(get_current_active_user_flexible)],
    tts_service: Annotated[TTSService, Depends(get_tts_service)],
) -> dict[str, str]:
    """Delete a TTS generation and its associated files."""
    try:
        if current_user.id is None:
            raise HTTPException(
                status_code=status.HTTP_401_UNAUTHORIZED,
                detail="User ID not available",
            )

        await tts_service.delete_tts(tts_id=tts_id, user_id=current_user.id)

        return {"message": "TTS generation deleted successfully"}

    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=str(e),
        ) from e
    except PermissionError as e:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail=str(e),
        ) from e
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"Failed to delete TTS: {e!s}",
        ) from e