/**
 * This script will capture a screenshot of a twitter account page
 *
 * Usage $ casperjs screenshot.coffee <twitter-account> <filename.[jpg|png|pdf]>
 */
var casper = require('casper').create({
    viewportSize: {
        width: 1024,
        height: 768
    }
});

var twitterAccount = casper.cli.get(0);
var filename = casper.cli.get(1);

if (!twitterAccount || !filename || !/\.(png|jpg|pdf)$/i.test(filename)) {
    casper.echo("Usage $ casperjs samples/screenshot.coffee <twitter-account> <filename.[jpg|png|pdf]>");
    casper.exit();
}

casper.start('https://twitter.com/#!/' + twitterAccount, function() {
    this.waitForSelector('.tweet-row', function() {
        this.captureSelector(filename, 'html');
        this.echo("Saved screenshot of " + this.getCurrentUrl() + " to " + filename);
    }, function() {
        this.die('Timeout reached. Fail whale?').exit();
    }, 12000);
});

casper.run();