// Runs the hub's API. Configuration (environment):
//   DATABASE_URL     postgres://... (default: PGlite files in ./data/db, for development)
//   AUTH_SECRET      at least 32 random characters (required unless NODE_ENV is development)
//   API_URL          the API's address as the website and proxies reach it (default http://localhost:4101)
//   WEB_URL          the website's address (default http://localhost:4100)
//   PORT             default 4101
//   REGISTRATION     open or closed (new accounts wait for a moderator's approval), until an admin sets it in the console
//   AGE_PROVIDERS    ways to verify age, comma-separated (default imvu): imvu, didit
//   DIDIT_API_KEY, DIDIT_WORKFLOW_ID, DIDIT_WEBHOOK_SECRET
//                    Didit's ID document check (docs/design.md, "Age"); its webhook is API_URL/api/v1/age/webhook/didit
//   DIDIT_MONTHLY_LIMIT  checks started a month at most (default 30: Didit's free plan has $10 of credit a month, and a
//                    check with ID document, liveness and face match costs $0.30)
import { openDatabase } from "@t5de/db";
import { AgeService, type Provider } from "./age";
import { diditAgeProvider } from "./age/didit";
import { imvuAgeProvider } from "./age/imvu";
import { createApp } from "./app";
import { createAuth } from "./auth";
import { Settings } from "./settings";
import { ImvuClient } from "./imvu";

const env = process.env;
const dev = env.NODE_ENV !== "production";
const port = Number(env.PORT ?? 4101);
const secret = env.AUTH_SECRET ?? (dev ? "development-secret-not-for-production-use" : "");
if (secret.length < 32) {
  console.error("AUTH_SECRET must be at least 32 characters");
  process.exit(1);
}
const apiURL = env.API_URL ?? `http://localhost:${port}`;
const webURL = env.WEB_URL ?? "http://localhost:4100";

const { db } = await openDatabase(env.DATABASE_URL ?? "./data/db");
const settings = new Settings(db, { registration: env.REGISTRATION });
const auth = createAuth(db, { apiURL, webURL, secret, settings });
const imvu = new ImvuClient();

function required(name: string): string {
  const v = env[name];
  if (!v) {
    console.error(`${name} must be set`);
    process.exit(1);
  }
  return v;
}
const ageProviders: Record<string, () => Provider> = {
  imvu: () => imvuAgeProvider(imvu),
  didit: () =>
    diditAgeProvider({
      apiKey: required("DIDIT_API_KEY"),
      workflowId: required("DIDIT_WORKFLOW_ID"),
      webhookSecret: required("DIDIT_WEBHOOK_SECRET"),
      monthlyLimit: Number(env.DIDIT_MONTHLY_LIMIT ?? 30),
    }),
};
const providers = (env.AGE_PROVIDERS ?? "imvu").split(",").map((id) => id.trim()).filter(Boolean);
if (!providers.includes("imvu")) providers.unshift("imvu"); // linking records IMVU's answer
for (const id of providers) {
  if (!ageProviders[id]) {
    console.error(`AGE_PROVIDERS: no provider ${id}`);
    process.exit(1);
  }
}
const ageService = new AgeService(db, providers.map((id) => ageProviders[id]!()));

const { app, age, rooms, products } = createApp({ db, auth, imvu, age: ageService, apiURL, webURL, settings });
app.listen({ port, hostname: env.HOST ?? "0.0.0.0" });

// Age answers that can change (IMVU's) are checked again when they expire, a few at a time; revisions missing their
// parent's info (IMVU was unavailable, or they predate it) get it, starting now.
const parentInfo = () => products.fillParentInfo(20).catch((e) => console.error("parent info:", e));
parentInfo();
setInterval(() => {
  age.recheckDue(50).catch((e) => console.error("age re-checks:", e));
  rooms.recheckDue(20).catch((e) => console.error("room re-checks:", e));
  parentInfo();
}, 10 * 60 * 1000);
console.log(`t5de-hub API on ${apiURL} (website ${webURL})`);