#!/usr/bin/env node

/**
 * RUNBO, FRONTEND-CONFIG COMMAND RUNNER
 *
 * This script is exposed as binary and allows you to run custom commands
 * in the frontend-config's /commands folder or in your project's /commands folder.
 *
 * How to use:
 * $ runbo <command-name> <arg1> <arg2>=<arg2-value> ... <argN>
 *
 * The <command-name> is the name of the command's script file without ".js" but
 * including the path. For example, if I want to run the command /commands/foo/bar.js
 * I need to write:
 * $ runbo foo/bar
 *
 * A command in the frontend-config module can be overridden by creating a command
 * script file with the same path in the project folder.
 *
 * Commands need to expose a function which takes a map of arguments as parameter.
 * Arguments can have a value if they are provided in the form <key>=<value>.
 * If a value is not provided, it will be set to "true" by default.
 *
 * For example, I could run:
 * $ runbo examples/my-command foo bar="Test bar"
 * This will expose the following arguments object:
 * { foo: true, bar: "Test bar" }
 *
 * Following is an example of how the command could be defined:
 *
 * @example
 * // ./commands/examples/my-command.js
 * module.exports = ({ foo = false, bar = 'hello'}) => {
 *  if (foo) {
 *    console.log(bar);
 *  }
 * };
 */

const { existsSync } = require('fs');
const path = require('path');

const [, , commandName, ...args] = process.argv;

if (!commandName) {
  throw new Error('Error: You must provide the name of the command to run.');
}

// Convert the arguments map into an object
const argsMap = args.reduce((accumulator, currentArg) => {
  const [argumentName, argumentValue] = currentArg.split('=');
  // If there is no value set, default to true
  accumulator[argumentName] = argumentValue || true;
  return accumulator;
}, {});

// Commands into the project's path override the command from the frontend config module
const projectCommandPath = `${path.resolve('commands', commandName)}.js`;
const frontendConfigCommandPath = `${path.resolve(__dirname, commandName)}.js`;

if (existsSync(projectCommandPath)) {
  // eslint-disable-next-line import/no-dynamic-require, global-require
  require(projectCommandPath)(argsMap);
} else if (existsSync(frontendConfigCommandPath)) {
  // eslint-disable-next-line import/no-dynamic-require, global-require
  require(frontendConfigCommandPath)(argsMap);
} else {
  throw new Error(`Command not found: ${commandName}`);
}