"""Presentation export endpoints with brand enforcement."""
import uuid
from typing import Literal, Optional

from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel
from sqlalchemy.ext.asyncio import AsyncSession

from models.sql.presentation import PresentationModel
from models.sql.user import UserModel
from services import audit_service
from services.database import get_async_session
from utils.auth_dependencies import get_current_user
from utils.export_utils import export_presentation

EXPORT_ROUTER = APIRouter(prefix="/api/v1/ppt", tags=["Export"])


class ExportRequest(BaseModel):
    format: Literal["pptx", "pdf"] = "pptx"


@EXPORT_ROUTER.post("/presentation/{presentation_id}/export")
async def export_with_brand(
    presentation_id: uuid.UUID,
    body: ExportRequest,
    current_user: UserModel = Depends(get_current_user),
    session: AsyncSession = Depends(get_async_session),
):
    """Export presentation with automatic brand enforcement.

    - Loads brand config from the presentation's client
    - Applies brand fonts, colors, logo, and contrast fixes
    - Returns file path for download
    """
    presentation = await session.get(PresentationModel, presentation_id)
    if not presentation:
        raise HTTPException(status_code=404, detail="Presentation not found")

    result = await export_presentation(
        presentation_id=presentation.id,
        title=presentation.title or str(presentation.id),
        export_as=body.format,
        client_id=presentation.client_id,
        session=session,
    )

    # Audit log
    audit_service.log(
        user_id=current_user.id,
        action="export",
        resource_type="presentation",
        resource_id=presentation.id,
        client_id=presentation.client_id,
        details={"format": body.format},
    )

    return {"path": result.path}