import { auth } from "@/app/(auth)/auth";
import { getAiModelById, getAiProviderById } from "@/lib/db/queries";
import { buildVideoToolCapability } from "@/lib/ai/video-tool-capability";
import { ChatSDKError } from "@/lib/errors";

export async function GET(request: Request) {
  try {
    const session = await auth();
    if (!session?.user?.id) {
      return new ChatSDKError("unauthorized:chat").toResponse();
    }

    const { searchParams } = new URL(request.url);
    const modelDbId = searchParams.get("modelId");
    if (!modelDbId) {
      return new ChatSDKError("bad_request:api", "modelId is required").toResponse();
    }

    const model = await getAiModelById({ id: modelDbId });
    if (!model || !model.isEnabled) {
      return new ChatSDKError("bad_request:api", "Model not found or disabled").toResponse();
    }

    const provider = await getAiProviderById({ id: model.providerId });
    if (!provider || !provider.isEnabled) {
      return new ChatSDKError("bad_request:api", "Provider not found or disabled").toResponse();
    }

    const capability = buildVideoToolCapability({
      providerType: provider.type,
      modelId: model.modelId,
      rawCapabilities: model.capabilities,
      imageGenConfig: (model.imageGenConfig || null) as
        | { videoDurationOptions?: number[] | null }
        | null,
    });

    return Response.json({
      modelId: model.id,
      modelName: model.displayName,
      providerType: provider.type,
      capability,
    });
  } catch (error) {
    if (error instanceof ChatSDKError) {
      return error.toResponse();
    }
    return new ChatSDKError("offline:chat").toResponse();
  }
}