"use strict";
const program = require("commander");
const colors = require("colors");
const maxCpus = require("os").cpus().length;

program.on("--help", () => {
  console.log("");
  console.log("  Examples:".blue);
  console.log("");
  console.log("    $ xmysql -u username -p password -d databaseSchema".blue);
  console.log("");
});

program
  .version(module.exports.version)
  .option("-h, --host <n>", "hostname of database / localhost by default")
  .option("-u, --user <n>", "username of database / root by default")
  .option("-p, --password <n>", "password of database / empty by default")
  .option("-d, --database <n>", "database schema name")
  .option(
    "-r, --ipAddress <n>",
    "IP interface of your server / localhost by default"
  )
  .option("-n, --portNumber <n>", "port number for app / 3000 by default")
  .option("-o, --port <n>", "port number for mysql / 3306 by default")
  .option("-S, --socketPath <n>", "unix socket path / not used by default")
  .option(
    "-s, --storageFolder <n>",
    "storage folder / current working dir by default / available only with local"
  )
  .option("-i, --ignoreTables <n>", "comma separated table names to ignore")
  .option("-a, --apiPrefix <n>", 'api url prefix / "/api/" by default')
  .option("-y, --readOnly", "readonly apis / false by default")
  .option(
    "-c, --useCpuCores <n>",
    "use number of CPU cores (using cluster) / 1 by default"
  )
  .parse(process.argv);

function paintHelp(txt) {
  return colors.magenta(txt); //display the help text in a color
}

function processInvalidArguments(program) {
  let err = "";

  if (!program.password) {
    err += "Error: password for database is missing\n";
  }

  if (!program.database) {
    err += "Error: database name is missing\n";
  }

  if (err !== "") {
    program.outputHelp(paintHelp);
    console.log(err.red);
  }
}

exports.handle = program => {
  /**************** START : default values ****************/
  program.ipAddress = program.ipAddress || "localhost";
  program.portNumber = program.portNumber || 3000;
  program.port = program.port || 3306;
  program.user = program.user || "root";
  program.password = program.password || "";
  program.host = program.host || "localhost";
  program.socketPath = program.socketPath || "";
  program.storageFolder = program.storageFolder || process.cwd();
  program.apiPrefix = program.apiPrefix || "/api/";
  program.readOnly = program.readOnly || false;
  program.useCpuCores = program.useCpuCores || 1;

  if (program.useCpuCores === "0") {
    program.useCpuCores = maxCpus;
  }

  if (program.ignoreTables) {
    let ignoreTables = program.ignoreTables.split(",");
    program.ignoreTables = {};
    for (var i = 0; i < ignoreTables.length; ++i) {
      program.ignoreTables[ignoreTables[i]] = ignoreTables[i];
    }
  } else {
    program.ignoreTables = {};
  }

  program.connectionLimit = 10;

  if (
    program.host === "localhost" ||
    program.host === "127.0.0.1" ||
    program.host === "::1"
  ) {
    program.dynamic = 1;
  }
  // console.log(program);
  /**************** END : default values ****************/

  if (program.database && program.host && program.user) {
    //console.log('Starting server at:', 'http://' + program.host + ':' + program.portNumber)
  } else {
    processInvalidArguments(program);
    process.exit(1);
  }
};