// var dust = require("dustjs-linkedin");
var dust = require("dustjs-helpers");
var fs = require("fs");
const path = require("path");

dust.helpers.dumpParameters = function(chunk, context, bodies, params) {
  // Dump the parameters to a dust helper to figure out what is passed
  // to a helper. I figure I need to make sure I'm passing
  // approximately the same information to my render functions if I
  // end up supporting custom helpers in the future to make sure
  // helpers can be ported easily.
  // console.log(JSON.stringify(Array.prototype.slice.call(arguments)));
  console.log("chunk: ", chunk);
  console.log("context: ", JSON.stringify(context));
  console.log("bodies: ", bodies);
  console.log("params: ", params);
}

var argv = process.argv.slice(2);
if (argv.length < 1) {
  console.error("Expecting only 1 argument (a path to a template)");
  process.exit(1);
}
var context = JSON.parse(fs.readFileSync(0, "utf-8"));
var main_template = path.parse(argv[0])["name"];

for (var i = 0, len = argv.length; i < len; ++i) {
  var filename = path.parse(argv[i])["name"];

  try {
    var template_source = fs.readFileSync(argv[i], "utf-8");
  } catch (err) {
    console.error(err);
    process.exit(1);
  }

  var compiled_template = dust.compile(template_source, filename);
  dust.loadSource(compiled_template);

}

dust.render(main_template, context, function(err, out) {
  if(err) {
    console.error(err);
    process.exit(1);
  } else {
    console.log(out);
    process.exit(0);
  }
});