#!/usr/bin/env node

'use strict';

const fs = require('fs');
const chalk = require('chalk');
const updateNotifier = require('update-notifier');

const doxdox = require('../lib/doxdox');

const findPackageFileInPath = require('../lib/utils').findPackageFileInPath;

const pkg = require('../package');

const args = require('parse-cmd-args')(null, {
    'allowMultipleInputs': true,
    'requireUserInput': true
});

updateNotifier({
    'defer': true,
    pkg
}).notify();

if (args.flags['--version'] || args.flags['-v']) {

    process.stdout.write(`${pkg.version}\n`);
    process.exit();

} else if (!args.inputs.length || args.flags['--help'] || args.flags['-h']) {

    process.stdout.write(`
${chalk.blue(' Usage:')} doxdox <path> ... [options]

 Options:

${chalk.yellow('  -h, --help')}             Display this help message.
${chalk.yellow('  -v, --version')}          Display the current installed version.
${chalk.yellow('  -d, --description')}      Sets description.
${chalk.yellow('  -i, --ignore')}           Comma separated list of paths to ignore.
${chalk.yellow('  -l, --layout')}           Template to render the documentation with.
${chalk.yellow('  -o, --output')}           File to save documentation to. Defaults to stdout.
${chalk.yellow('  -p, --package')}          Sets location of package.json file.
${chalk.yellow('  -t, --title')}            Sets title.

 Included Layouts:

  - Markdown (default)    (http://daringfireball.net/projects/markdown/)
  - Bootstrap             (http://getbootstrap.com/)
  - Handlebars            (http://handlebarsjs.com/)

`);
    process.exit();

} else {

    const projectPkgPath = findPackageFileInPath(args.flags['--package'] || args.flags['-p']);

    let projectPkg = {};

    try {

        const projectPkgStats = fs.statSync(projectPkgPath);

        if (projectPkgStats.isFile()) {

            projectPkg = require(projectPkgPath);

        }

    } catch (err) {

        process.stderr.write(`${err.toString()}\n`);

    }

    const config = {
        'description': args.flags['--description'] || args.flags['-d'] || projectPkg.description || '',
        'ignore': (args.flags['--ignore'] || args.flags['-i'] || '').split(/\s*,\s*/),
        'layout': (args.flags['--layout'] || args.flags['-l'] || 'markdown').toLowerCase(),
        'parser': (args.flags['--parser'] || args.flags['-r'] || 'dox').toLowerCase(),
        'title': args.flags['--title'] || args.flags['-t'] || projectPkg.name || 'Untitled Project'
    };

    const output = args.flags['--output'] || args.flags['-o'] || null;

    doxdox.parseInputs(args.inputs, Object.assign({
        'pkg': projectPkg
    }, config))
        .then(content => {

            if (output) {

                fs.writeFileSync(output, content, 'utf8');

            } else {

                process.stdout.write(content);

            }

        })
        .catch(err => {

            process.stderr.write(`${err.toString()}\n`);

        });

}