import { resolve } from "node:path";
import Fastify from "fastify";
import {
  serializerCompiler,
  validatorCompiler,
  type ZodTypeProvider,
} from "@fastify/type-provider-zod";
import type { AppConfig } from "./config.js";
import { loadConfig } from "./config.js";
import authPlugin from "./plugins/auth.js";
import cfClientPlugin from "./plugins/cf-client.js";
import { requireAuth } from "./plugins/auth.js";
import corsPlugin from "./plugins/cors.js";
import dbPlugin from "./plugins/db.js";
import errorHandlerPlugin from "./plugins/error-handler.js";
import { authRoutes, healthRoutes } from "./routes/health.js";
import { groupRoutes } from "./routes/groups.js";
import { serviceRoutes } from "./routes/services.js";
import { serviceGroupRoutes } from "./routes/service-groups.js";
import { serviceBindingRoutes } from "./routes/service-bindings.js";
import { domainRoutes } from "./routes/domains.js";
import { dnsRoutes } from "./routes/dns.js";
import { subdomainRoutes } from "./routes/subdomains.js";
import { certificateRoutes } from "./routes/certificates.js";
import { syncRoutes } from "./routes/sync.js";
import { originHealthCheckRoutes } from "./routes/origin-health-checks.js";
import { healthCheckRoutes } from "./routes/health-check.js";
import {
  domainMonitorRoutes,
  notificationRoutes,
} from "./routes/domain-monitors.js";
import { settingsRoutes } from "./routes/settings.js";
import { integrationsVpsTrackerRoutes } from "./routes/integrations-vps-tracker.js";
import { auditRoutes } from "./routes/audit.js";
import * as certificateService from "./services/certificate-service.js";
import {
  createHealthCheckTask,
  healthEngineFallbacksFromConfig,
  scheduleHealthCheckJob,
} from "./services/health-check-scheduler.js";
import { fireEnsureHealthWorker } from "./services/health/health-worker-deploy.js";
import { AsyncTask, CronJob } from "toad-scheduler";

export interface BuildAppOptions {
  config?: AppConfig;
  memory?: boolean;
}

export async function buildApp(opts: BuildAppOptions = {}) {
  const config = opts.config ?? loadConfig();

  const app = Fastify({
    logger: { level: config.logLevel },
  }).withTypeProvider<ZodTypeProvider>();

  app.setValidatorCompiler(validatorCompiler);
  app.setSerializerCompiler(serializerCompiler);

  await app.register(import("@fastify/sensible"));
  await app.register(import("@fastify/helmet"), { contentSecurityPolicy: false });
  await app.register(import("@fastify/rate-limit"), {
    max: 300,
    timeWindow: "1 minute",
  });
  await app.register(corsPlugin);
  await app.register(errorHandlerPlugin);
  await app.register(dbPlugin, { config, memory: opts.memory });
  await app.register(cfClientPlugin, { config });
  await app.register(authPlugin, { config });

  await app.register(healthRoutes);
  await app.register(authRoutes, { prefix: "/api/v1" });
  await app.register(integrationsVpsTrackerRoutes, { prefix: "/api/v1" });

  await app.register(
    async (protectedApi) => {
      protectedApi.addHook("onRequest", requireAuth);
      await protectedApi.register(groupRoutes);
      await protectedApi.register(serviceRoutes);
      await protectedApi.register(serviceGroupRoutes);
      await protectedApi.register(serviceBindingRoutes);
      await protectedApi.register(domainRoutes);
      await protectedApi.register(dnsRoutes);
      await protectedApi.register(subdomainRoutes);
      await protectedApi.register(certificateRoutes);
      await protectedApi.register(syncRoutes);
      await protectedApi.register(healthCheckRoutes);
      await protectedApi.register(originHealthCheckRoutes);
      await protectedApi.register(domainMonitorRoutes);
      await protectedApi.register(notificationRoutes);
      await protectedApi.register(settingsRoutes);
      await protectedApi.register(auditRoutes);
    },
    { prefix: "/api/v1" },
  );

  const staticDir = config.staticDir ?? resolve(process.cwd(), "static");
  if (config.staticDir !== null) {
    await app.register(import("@fastify/static"), {
      root: staticDir,
      wildcard: false,
    });

    app.setNotFoundHandler(async (_request, reply) => {
      return reply.sendFile("index.html");
    });
  }

  if (!opts.memory) {
    await app.register(import("@fastify/schedule"));

    const certTask = new AsyncTask(
      "certificate-check",
      async () => {
        const n = await certificateService.runAllChecks(app.db);
        app.log.info({ checked: n }, "certificate check completed");
      },
      (err) => {
        app.log.warn({ err }, "certificate check failed");
      },
    );

    app.scheduler.addCronJob(
      new CronJob(
        { cronExpression: config.certCheckCron },
        certTask,
        { preventOverrun: true },
      ),
    );

    const healthTask = createHealthCheckTask(app, config);
    scheduleHealthCheckJob(app, config, healthTask);
    app.decorate("reloadHealthCheckJob", () => {
      scheduleHealthCheckJob(app, config, healthTask);
    });
    if (config.cloudflareApiToken) {
      fireEnsureHealthWorker(
        app.db,
        app.cf,
        healthEngineFallbacksFromConfig(config),
        app.log,
      );
    }
  }

  return app;
}