from __future__ import annotations

from app.config.models import InfinityMirrorConfig
from app.core.types import PreviewFrame

from .base import OutputBackend, OutputResult


class PreviewOutputBackend(OutputBackend):
    backend_id = "preview"
    display_name = "Preview Only"
    supports_live_output = False

    def send_frame(self, config: InfinityMirrorConfig, frame: PreviewFrame) -> OutputResult:
        return OutputResult(ok=True, message="Preview-only mode active.", packets_sent=0, device_count=0)