// Imports
import path from "node:path";
import { URL } from "node:url";
import { migrate } from "postgres-migrations";
import createPgp from "pg-promise";
import moment from "moment";
import { INFO, WARN, OK, VERB } from "../util/logging.js";

// Environment Variables
const {
  QUALITEER_POSTGRES_DATABASE: database,
  QUALITEER_POSTGRES_ENABLED: pgEnabled,
  QUALITEER_POSTGRES_HOST: host,
  QUALITEER_POSTGRES_PASSWORD: password,
  QUALITEER_POSTGRES_PORT: port,
  QUALITEER_POSTGRES_USER: user,
} = process.env;

// Postgres-promise Configuration
// Ensure dates get saved as UTC date strings
// This prevents the parser from doing strange datetime operations
const pgp = createPgp();
pgp.pg.types.setTypeParser(1114, (str) => moment.utc(str).format());

// Database Config
const dbConfig = {
  database: database ?? "qualiteer",
  user: user ?? "postgres",
  password: password ?? "postgres",
  host: host ?? "localhost",
  port: port ?? 5432,
  ensureDatabaseExists: true,
};

const databaseDir = new URL(".", import.meta.url).pathname;
const migrationsDir = path.resolve(databaseDir, "migrations/");

const queryMock = (str) => INFO("POSTGRES MOCK", str);

const connect = (pg) => async () => {
  if (pgEnabled === "false") {
    WARN("POSTGRES", "Postgres Disabled!");
    return { query: queryMock };
  }
  VERB("POSTGRES", "Migrating...");
  await migrate(dbConfig, migrationsDir);
  // Override fake methods
  const pgInstance = pgp(dbConfig);
  for (var k in pgInstance) pg[k] = pgInstance[k];
  VERB("POSTGRES", "Migrated Successfully!");
  await pg.connect();
  VERB("POSTGRES", "Postgres connected Successfully!");

  OK("POSTGRES", `Connected to database ${dbConfig.database}!`);
};

const buildPostgres = () => {
  var pg = { query: queryMock };
  pg.connect = connect(pg);
  return pg;
};

export default buildPostgres();