import Fastify from "fastify";
import { z } from "zod";
import { renderPresentation } from "./render.js";

const app = Fastify({ logger: true });

const Slide = z.object({
  layout: z.enum(["title", "section", "bullets", "chart_and_insight", "image_reference"]).default("bullets"),
  title: z.string(),
  subtitle: z.string().optional(),
  bullets: z.array(z.string()).default([]),
  insights: z.array(z.string()).default([]),
  notes: z.string().optional()
});

const Presentation = z.object({
  title: z.string(),
  theme: z.record(z.unknown()).default({}),
  slides: z.array(Slide).default([]),
  provenance: z.array(z.record(z.unknown())).default([])
});

app.get("/health", async () => ({ status: "ok" }));

app.post("/render", async (request, reply) => {
  const spec = Presentation.parse(request.body);
  const pptx = await renderPresentation(spec);
  reply.header("content-type", "application/vnd.openxmlformats-officedocument.presentationml.presentation");
  reply.header("content-disposition", "attachment; filename=\"visual-runtime-deck.pptx\"");
  return reply.send(pptx);
});

const port = Number(process.env.PORT ?? 8787);
await app.listen({ host: "0.0.0.0", port });