/**
Definition of the HtmlPdfCLIGenerator class.
@module html-pdf-generator.js
@license MIT. See LICENSE.md for details.
 */

(function() {
  var FS, HTML, HtmlPdfCLIGenerator, PATH, SLASH, SPAWN, TemplateGenerator, engines;

  TemplateGenerator = require('./template-generator');

  FS = require('fs-extra');

  HTML = require('html');

  PATH = require('path');

  SPAWN = require('../utils/safe-spawn');

  SLASH = require('slash');


  /**
  An HTML-driven PDF resume generator for HackMyResume. Talks to Phantom,
  wkhtmltopdf, and other PDF engines over a CLI (command-line interface).
  If an engine isn't installed for a particular platform, error out gracefully.
   */

  HtmlPdfCLIGenerator = module.exports = TemplateGenerator.extend({
    init: function() {
      return this._super('pdf', 'html');
    },

    /** Generate the binary PDF. */
    onBeforeSave: function(info) {
      var ex, safe_eng;
      try {
        safe_eng = info.opts.pdf || 'wkhtmltopdf';
        if (safe_eng !== 'none') {
          engines[safe_eng].call(this, info.mk, info.outputFile);
          return null;
        }
      } catch (_error) {
        ex = _error;
        if (ex.inner && ex.inner.code === 'ENOENT') {
          throw {
            fluenterror: this.codes.notOnPath,
            inner: ex.inner,
            engine: ex.cmd,
            stack: ex.inner && ex.inner.stack
          };
        } else {
          throw {
            fluenterror: this.codes.pdfGeneration,
            inner: ex,
            stack: ex.stack
          };
        }
      }
    }
  });

  engines = {

    /**
    Generate a PDF from HTML using wkhtmltopdf's CLI interface.
    Spawns a child process with `wkhtmltopdf <source> <target>`. wkhtmltopdf
    must be installed and path-accessible.
    TODO: If HTML generation has run, reuse that output
    TODO: Local web server to ease wkhtmltopdf rendering
     */
    wkhtmltopdf: function(markup, fOut) {
      var info, tempFile;
      tempFile = fOut.replace(/\.pdf$/i, '.pdf.html');
      FS.writeFileSync(tempFile, markup, 'utf8');
      return info = SPAWN('wkhtmltopdf', [tempFile, fOut]);
    },

    /**
    Generate a PDF from HTML using Phantom's CLI interface.
    Spawns a child process with `phantomjs <script> <source> <target>`. Phantom
    must be installed and path-accessible.
    TODO: If HTML generation has run, reuse that output
    TODO: Local web server to ease Phantom rendering
     */
    phantom: function(markup, fOut) {
      var destPath, info, scriptPath, sourcePath, tempFile;
      tempFile = fOut.replace(/\.pdf$/i, '.pdf.html');
      FS.writeFileSync(tempFile, markup, 'utf8');
      scriptPath = SLASH(PATH.relative(process.cwd(), PATH.resolve(__dirname, '../utils/rasterize.js')));
      sourcePath = SLASH(PATH.relative(process.cwd(), tempFile));
      destPath = SLASH(PATH.relative(process.cwd(), fOut));
      return info = SPAWN('phantomjs', [scriptPath, sourcePath, destPath]);
    }
  };

}).call(this);