#!/usr/bin/env node

var fs = require('fs'),
    path = require('path'),
    geojsonhint = require('../'),
    chalk = require('chalk'),
    table = require('text-table'),
    concat = require('concat-stream'),
    argv = require('minimist')(process.argv.slice(2));

if (process.stdin.isTTY && !argv._[0]) {
    process.stdout.write(fs.readFileSync(path.join(__dirname, '/HELP.md')));
    process.exit(1);
}

var filename;
if (argv._[0]) {
    filename = argv._[0];
}

(filename ? fs.createReadStream(filename) : process.stdin).pipe(concat(hint));

/**
 * Given a word and a count, append an s if count is not one.
 * @param {string} word A word in its singular form.
 * @param {int} count A number controlling whether word should be pluralized.
 * @returns {string} The original word with an s on the end if count is not one.
 */
function pluralize(word, count) {
    return (count === 1 ? word : word + 's');
}

function hint(input) {

    var options = {
      noDuplicateMembers: argv.noDuplicateMembers !== 'false'
    };

    var errors = geojsonhint.hint(input.toString(), options);

    if (!errors || !errors.length) {
        process.exit(0);
    }

    var format = argv.f || argv.format || 'pretty';

    if (format === 'json') {
        if (errors instanceof Error) {
            console.log(JSON.stringify(errors.toString(), null, 2));
        } else {
            console.log(JSON.stringify(errors, null, 2));
        }
    } else if (format === 'pretty') {
        if (errors instanceof Error) {
            console.log(chalk.red('invalid JSON'));
            throw errors;
        }
        var output = table(errors.map(function(e) {
          return [
            e.line + ':',
            chalk.red(e.message)
          ];
        }), {
          align: ['r', 'l']
        }) + '\n\n' + errors.length + ' ' + pluralize('error', errors.length);
        console.log(output);
    } else if (format === 'compact') {
        if (errors instanceof Error) {
            console.log(chalk.red('invalid JSON'));
            throw errors;
        }
        var filePart = filename ? filename + ': ' : '';
        errors.forEach(function(e) {
          console.log(filePart + 'line ' + e.line + ' - ' + e.message);
        });
    } else {
        throw new Error('Format unknown');
    }
}