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/* TODO
From Abi:
	I think the ones I most often use would be to check the current status
	of a specific friend (or maybe, the last 3 statuses). The ability to
	check your friends timeline as a whole would also be nice.


*/

// max of 140 chars is recommended, but it really allows 160... but that gets truncated on some displays? grr
const TWITTER_STATUS_MAXLEN = 140;


CmdUtils.CreateCommand({
  name: "twitter",
  synonyms: ["tweet"],
  icon: "http://assets3.twitter.com/images/favicon.ico",
  takes: {status: noun_arb_text},
  modifiers: {},
  description: "Sets your Twitter status to a message of at most 160 characters.",
  help: "You'll need a <a href=\"http://twitter.com\">Twitter account</a>, obviously.  If you're not already logged in" +
        " you'll be asked to log in.",
  preview: function(previewBlock, directObj) {
	// these are converted in the Twitter database anyway, and counted as 4 characters
    var statusText = directObj.text
	  .replace("<", "&lt;")
	  .replace(">", "&gt;");

    var previewTemplate = "Updates your Twitter status to: <br /><b>${status}</b><br /><br />Characters remaining: <b>${chars}</b> <p style='font-size:11px'> tip: tweet @mozillaubiquity for help </p>";
    var truncateTemplate = "<br />The last <b>${truncate}</b> characters will be truncated!";
    var previewData = {
      status: statusText,
      chars: TWITTER_STATUS_MAXLEN - statusText.length
    };

    var previewHTML = CmdUtils.renderTemplate(previewTemplate, previewData);

    if(previewData.chars < 0) {
      var truncateData = {
        truncate: 0 - previewData.chars
      };

      previewHTML += CmdUtils.renderTemplate(truncateTemplate, truncateData);
    }

    previewBlock.innerHTML = previewHTML;
  },
  execute: function(directObj) {
    var statusText = directObj.text;
    if(statusText.length < 1) {
      displayMessage("Twitter requires a status to be entered");
      return;
    }

    var updateUrl = "https://twitter.com/statuses/update.json";
    var updateParams = {
      source: "ubiquity",
      status: statusText.slice(0, TWITTER_STATUS_MAXLEN)
    };

    jQuery.ajax({
      type: "POST",
      url: updateUrl,
      data: updateParams,
      dataType: "json",
      error: function() {
        displayMessage("Twitter error - status not updated");
      },
      success: function() {
        displayMessage("Twitter status updated");
      }
    });
  }
});