import Fastify from "fastify";
import cookie from "@fastify/cookie";
import cors from "@fastify/cors";
import rateLimit from "@fastify/rate-limit";
import websocket from "@fastify/websocket";
import { loadConfig } from "./config";
import { disconnectDatabase, prisma } from "./database/client";
import { registerAuthRoutes, ensureAdminUser } from "./auth/routes";
import { registerNodeRoutes } from "./nodes/routes";
import { registerStremioRoutes } from "./stremio/routes";
import { registerAdminRoutes } from "./admin/routes";
import { registerInstallRoutes } from "./install/routes";
import { nodeConnectionManager } from "./websocket/manager";
import { MetadataService } from "./metadata/service";
import { toErrorResponse } from "./security/errors";

async function main() {
  const config = loadConfig();

  const app = Fastify({
    logger: {
      level: config.NODE_ENV === "production" ? "info" : "debug",
      redact: ["req.headers.cookie", "req.headers.authorization"],
    },
    trustProxy: true,
  });

  await app.register(cors, {
    origin: true,
    credentials: true,
  });

  await app.register(cookie, {
    secret: config.SESSION_SECRET,
  });

  await app.register(rateLimit, {
    max: 300,
    timeWindow: "1 minute",
  });

  await app.register(websocket, {
    options: {
      // Large library sync batches (still chunked on the node side)
      maxPayload: 16 * 1024 * 1024,
    },
  });

  app.addHook("onSend", async (request, reply, payload) => {
    if (!request.url.startsWith("/stremio/")) {
      reply.header("X-Content-Type-Options", "nosniff");
      reply.header("Referrer-Policy", "no-referrer");
      reply.header("X-Frame-Options", "DENY");
    }
    return payload;
  });

  app.setErrorHandler((error, _request, reply) => {
    const { statusCode, body } = toErrorResponse(error);
    reply.status(statusCode).send(body);
  });

  app.get("/health", async () => ({
    status: "ok",
    service: "master-api",
    version: "1.0.0",
  }));

  await registerAuthRoutes(app, config);
  await registerNodeRoutes(app);
  await registerStremioRoutes(app, config);
  await registerAdminRoutes(app, config);
  await registerInstallRoutes(app, config);

  app.get("/api/v1/node/connect", { websocket: true }, (socket) => {
    void nodeConnectionManager.handleConnection(socket);
  });

  nodeConnectionManager.init(config);
  await ensureAdminUser(config);

  // Safety net if migrate history drifted — series meta must not 500.
  try {
    await prisma.$executeRawUnsafe(
      `ALTER TABLE "episodes" ADD COLUMN IF NOT EXISTS "still_url" TEXT`
    );
    await prisma.$executeRawUnsafe(
      `ALTER TABLE "series" ADD COLUMN IF NOT EXISTS "logo_url" TEXT`
    );
  } catch (err) {
    console.warn("Could not ensure still_url/logo_url columns:", err);
  }

  // Repair drifted episode.series_id so series.episodes and seasons.episodes stay aligned.
  try {
    await prisma.$executeRawUnsafe(`
      UPDATE episodes e
      SET series_id = s.series_id
      FROM seasons s
      WHERE e.season_id = s.id
        AND e.series_id IS DISTINCT FROM s.series_id
    `);
    await prisma.$executeRawUnsafe(`
      UPDATE episodes e
      SET season_id = s.id
      FROM seasons s
      WHERE s.series_id = e.series_id
        AND s.season_number = e.season_number
        AND e.season_id IS DISTINCT FROM s.id
    `);
  } catch (err) {
    console.warn("Could not repair episode series/season drift:", err);
  }

  const shutdown = async () => {
    console.log("Shutting down...");
    nodeConnectionManager.shutdown();
    await app.close();
    await disconnectDatabase();
    process.exit(0);
  };

  process.on("SIGINT", shutdown);
  process.on("SIGTERM", shutdown);

  await app.listen({ port: config.PORT, host: config.HOST });
  console.log(`Master API listening on ${config.HOST}:${config.PORT}`);

  // Background: fill ALL missing movie imdbIds (batched) so Cinemeta can resolve local streams.
  if (config.TMDB_API_KEY) {
    const metadata = new MetadataService(config.TMDB_API_KEY);
    setTimeout(() => {
      void metadata
        .backfillMovieImdbIds({ delayMs: 120 })
        .then((r) => {
          if (r.checked > 0) {
            console.log(
              `IMDb backfill: checked=${r.checked} updated=${r.updated} remaining=${r.remaining} failed=${r.failed}`
            );
          }
        })
        .catch((err) => console.warn("IMDb backfill failed:", err));
    }, 5000);
  }
}

main().catch((err) => {
  console.error("Failed to start:", err);
  void prisma.$disconnect();
  process.exit(1);
});