import parser from "body-parser";
import express from "express";
import lusca from "lusca";
import morgan from "morgan";
import PouchDB from "pouchdb";
import pouchFind from "pouchdb-find";
import pouchMemoryAdapter from "pouchdb-adapter-memory";

import { config } from "./config";
import * as controllers from "./controllers";
import * as repositories from "./repositories";
import * as routes from "./routes";
import * as services from "./services";
import * as crons from "./cron";

const demoAddress = "8f4f6a13cbb1724800079d9f699b3a02c91246ba";

async function main() {
  const app = express();
  const logger = morgan("combined");
  const router = express.Router();

  // In production, you would probably use a DI container to handle the
  // dependency graph. However, since this is a trivial example, we'll just go
  // with hand-wiring ;)

  // initialise data layer
  // use an in-memory db
  PouchDB.plugin(pouchFind);
  PouchDB.plugin(pouchMemoryAdapter);
  const depositDB = new PouchDB("deposits", { adapter: "memory" });
  depositDB.createIndex({ index: { fields: ["address"] } });
  const depositRepo = new repositories.DepositRepository(depositDB);

  // initialise services
  const zilliqaSvc = new services.ZilliqaService(
    "https://dev-api.zilliqa.com/",
    {
      [config.get("mnemonic")]: 8,
    }
  );

  // boot up cron jobs
  // these can also be destroyed
  const depositCron = new crons.DepositCron("* * * * *", zilliqaSvc, [
    demoAddress,
  ]);
  depositCron.start();

  // instantiate controllers
  const depositController = new controllers.DepositController(depositRepo);
  const withdrawalController = await new controllers.WithdrawalController(
    zilliqaSvc
  );
  await withdrawalController.init();

  // setup routes
  routes.deposit.get(router, depositController);
  routes.withdraw.create(router, withdrawalController);

  // setup middleware
  app.use(parser.json());
  app.use(parser.urlencoded({ extended: true }));
  app.use(logger);
  app.use(lusca.nosniff());
  app.use(lusca.xframe("SAMEORIGIN"));
  app.use(lusca.xssProtection());
  app.use(router);

  app.listen(8080, () => {
    console.log("Server listening on port 8080.");
  });
}

main();