#!/usr/bin/env node

const landxml = require('../bundles/landxml.node');
const fs = require('fs');

const argv = require('yargs')
  .scriptName("land2geo")
  .usage('$0 <cmd> [args]')
  .command('convert <file>', 'convert a LandXML file to GeoJSON', {
    alias: 'projection',
    default: landxml.PROJECTION_AUTO_DETECT,
    describe: 'use the specified source projection',
    type: 'string',
    builder: yargs => {
      yargs
        .positional('file', {
          describe: 'the LandXML file to convert',
          type: 'string'
        })
        .require('file')
        .coerce('file', function (arg) {
          return require('fs').readFileSync(arg, 'utf8')
        })
        .option('p', {
          alias: 'projection',
          describe: 'the source coordinates projection to use for the LandXML file',
          type: 'string'
        })
        .option('o', {
          alias: 'output',
          describe: 'the path to the output file. default to stdout',
          type: 'string'
        })
      ;
    },
    handler: argv => {
      const converter = new landxml.Converter();
      converter.toGeoJSON(argv.file, { projection: argv.projection })
        .then(geojson => {
          const data = JSON.stringify(geojson, null, 2);
          if (argv.output) {
            fs.writeFileSync(argv.output, data);
          } else {
            console.log(data);
          }
        })
        .catch(err => {
          console.error(err);
        })
      ;
    }
  })
  .demandCommand()
  .help()
  .argv