#!/usr/bin/env node
// vim:ft=javascript

var args = require('minimist')(process.argv.slice(2), {
  string: 'lang',
  boolean: ['pager', 'numbers'],
  default: {
    pager: true,
  },
  alias: {
    h: 'help', v: 'version', l: 'lang', page: 'pager', N: 'numbers'
  }
});

var read = require('../lib/read'),
    hicat = require('../index'),
    term = require('../lib/term');

/**
 * --help: display help usage.
 */

if (args.help) {
  console.log([
      'Usage:',
      '    hicat [options] FILE', 
      '    ... | hicat [options]',
      '',
      'Options:',
      '    -h, --help         print usage information',
      '    -v, --version      show version info and exit',
      '    -l, --lang TYPE    use a given language',
      '    -N, --numbers      add line numbers',
      '        --languages    list available languages',
      '        --no-pager     disable the pager',
      '        --debug        show verbose info',
  ].join('\n'));
  process.exit(0);
}

if (args.version) {
  console.log(require('../package.json').version);
  process.exit(0);
}

/**
 * --languages: list languages.
 */

if (args.languages) {
  console.log(hicat.listLanguages().sort().join("\n"));
  process.exit(0);
}

/**
 * --list-colors: display the color scheme used.
 * Undocumented for now, but will be configurable soon.
 */

if (args['list-colors']) {
  Object.keys(hicat.colors).forEach(function (key) {
    var val = hicat.colors[key];
    console.log(key + "=" + val);
  });
  process.exit(0);
}

/*
 * Read files from stdin or from the given files.
 */

var exit = 0;
var str = '';

read(args._, function (err, data) {
  var files = data.files;
  files.forEach(function (f) {
    if (f.error) {
      console.error(f.file + ": " + f.error.message);
      exit = 8;
    } else {
      var output = hicat(f.data, {
        filename: f.name,
        lang: args.lang,
        debug: args.debug,
        numbers: args.numbers
      });
      str += output.ansi;
    }
  });

  // check if it's stdin
  var stdin = files && files[0] && files[0].stdin;

  // don't use the pager on --no-pager, piping, or non-0 exit codes
  if (!args.pager || stdin || exit)
    process.stdout.write(str);
  else
    term.print(str);

  if (exit > 0) process.exit(exit);
});