#!/usr/bin/env node
"use strict";

const Database = require("better-sqlite3");
const path = require("path");
const crypto = require("crypto");

const DB_PATH = path.resolve(__dirname, "../data/data.db");

function callDb(fn) {
  const db = new Database(DB_PATH, { fileMustExist: true });
  try {
    fn(db);
  } finally {
    db.close();
  }
}

function gen(bytes) {
  return crypto.randomBytes(bytes).toString("hex");
}

/**
 * adduser <user_name> <source>
 */
function addUser(args) {
  const [userName, source] = args;

  if (!userName || !source) {
    console.error("usage: adduser <user_name> <source>");
    process.exit(1);
  }

  callDb((db) => {
    const res = db
      .prepare(
        `
        INSERT INTO users (
          user_name,
          user_source,
          user_status,
          user_created_at
        )
        VALUES (?, ?, 1, ?)
      `,
      )
      .run(userName, source, Date.now());

    console.log("user_id:", res.lastInsertRowid);
  });
}

/**
 * genkey <user_name>
 */
function genKey(args) {
  const [userName] = args;

  callDb((db) => {
    const user = db
      .prepare(`SELECT user_id FROM users WHERE user_name = ?`)
      .get(userName);

    if (!user) {
      console.error("user not found");
      process.exit(1);
    }

    const apiKey = gen(24); // 48 hex chars
    const apiSecret = gen(48); // 96 hex chars

    db.prepare(
      `
      UPDATE users
      SET user_api_key = ?, user_api_secret = ?
      WHERE user_id = ?
    `,
    ).run(apiKey, apiSecret, user.user_id);

    console.log("api_key:", apiKey);
    console.log("api_secret:", apiSecret);
  });
}

/**
 * disable <user_name>
 */
function disableUser(args) {
  const [userName] = args;

  callDb((db) => {
    db.prepare(
      `
      UPDATE users SET user_status = 0
      WHERE user_name = ?
    `,
    ).run(userName);

    console.log("user disabled:", userName);
  });
}

/**
 * list <user_name>
 */
function listUser(args) {
  const [userName] = args;

  callDb((db) => {
    const user = db
      .prepare(
        `
        SELECT
          user_id,
          user_name,
          user_source,
          user_status,
          user_api_key,
          user_created_at
        FROM users
        WHERE user_name = ?
      `,
      )
      .get(userName);

    if (!user) {
      console.log("user not found");
      return;
    }

    console.log(user);
  });
}

/* ======================== */

const argv = process.argv.slice(2);
const cmd = argv[0];
const args = argv.slice(1);

switch (cmd) {
  case "adduser":
    addUser(args);
    break;

  case "genkey":
    genKey(args);
    break;

  case "disable":
    disableUser(args);
    break;

  case "list":
    listUser(args);
    break;

  default:
    console.error("Unknown command");
    console.error("Commands: adduser | genkey | disable | list");
    process.exit(1);
}