$(document).ready(function() {
  $( 'a[href]' ).click( function( evt ) {  
    if ( window._gaq ) {
      var href = $( this ).attr( 'href' );
      var content = $( this ).text();
      var type = 'Internal Link';
      if ( href.match( /^http/i ) ) {
        type = 'External Link';
      }
      window._gaq.push( ['_trackEvent', type, 'Click', content ] );
    }
  });
  
  //Change teacher image sources to prevent super-long page load
  $( 'html:not(.ie6) #viewer img:not(:first)' ).each( function() {
    var src = $( this ).attr( 'src' );
    $( this ).attr( 'src', 'http://cdn.imagineyogachicago.com/img/i.gif' ).attr( 'data-src', src );
  });
  
  //Make gallery for home page
  $( 'body.pg-home .img-wrapper' ).each( function() {
    function fadeClone() {
      $( 'img.clone' ).fadeOut( 1500, function() {
        $( this ).remove();
        cloneImg();
      });
    }
    function cloneImg() {
      var wrapper = $( 'body.pg-home .img-wrapper' );
      var img = wrapper.find( 'img' );
      wrapper.append( img.clone().addClass( 'clone' ) );
      var nextIdx = ( parseInt( img.attr( 'src' ).match( /\d/gi )[ 0 ] ) % 5 ) + 1;
      img.attr( 'src', 'http://cdn.imagineyogachicago.com/img/home/' + nextIdx + '.jpg' );
    }  
    
    window.setInterval( fadeClone, 4000 );
    cloneImg();
  });
  
  //Capture and cancel clicks on the current navigation item
  $( '.primary-nav .current a' ).click( function( evt ) {
    evt.preventDefault();
  });
  
  //Enable scrolling for teacher page
  $( 'body.pg-teach .teacher-list a' ).click( function( evt ) {
      if ( $( this ).parent().hasClass( 'current' ) ) return false;
      
      var pos = $( this ).parent().index() + 1;   
      var teacher = $( this ).attr( 'data-teacher' );
      var target = $( '#viewer div.teacher[data-teacher=' + teacher + '] img' );
      if ( target.length && target.attr( 'data-src' ) ) target.attr( 'src', target.attr( 'data-src' ) ).removeAttr( 'data-src' );
      
      $( '#viewer' ).scrollTo( 'div.teacher[data-teacher=' + teacher + ']', {
          duration: 1000
        , easing: 'swing'
        , onAfter: function() {
          $( 'ul.teacher-list' )
            .find( 'li.current' ).removeClass( 'current' ).end()
            .find( 'a[data-teacher=' + teacher + ']' ).parent().addClass( 'current' );
          window._gaq.push( ['_trackEvent', 'Interaction', 'View Teacher', teacher.replace(/^\w/, function($0) { return $0.toUpperCase(); }), pos ] );
        } } );
    
      evt.preventDefault();
  });
  
  function handleSubscribeXHR( content ) {
    var data = content.split( '|' );
    var code = parseInt( data[0] )
      , msg = data[1];

    switch( code ) {
      case 2: //success
        if ( data && data[2] ) window._gaq.push( ['_trackEvent', 'Interaction', 'Subscribe-Success', data[2] ] );

        $( '#subscribe .steps' ).append( '<div class="step step-3"><h3>Almost Done!</h3><p>' + msg + '</p></div>' );
        $( '#subscribe' ).scrollTo( '.step-3', {
    	      offset:-20
    	    , duration:200
    	    , easing:'swing'
    	  });
        break;
      case 0: //no email
	    case 1: //invalid email
	    case 3: //an API error
	      var error = ( code != 3 ) ? msg : 'An error occurred. Please try again in a moment.';
	      window._gaq.push( ['_trackEvent', 'Interaction', 'Subscribe-Error', msg, code ] );
	      $( '#subscribe' )
	        .find( 'p.form-copy' ).addClass( 'has-error' ).html( '<em class="icon">!</em>' + error ).end()
	        .scrollTo( '.step-1', { offset:-20, duration:200, easing:'swing' } );
	      break;
    } //switch
  }
  
  //Enable subscribe form for XHR
	$('#subscribe form').submit(function( evt ) {
	  var addr = escape( $( '#subscriber-email' ).val() );
	  
    evt.preventDefault();
	  
	  if ( ! $( '#subscribe .step-2' ).length ) $( '#subscribe .steps' ).append( //If <div.step2> doesn't exist, create it
	    '<div class="step step-2"><h3>Please wait...</h3><p>Checking your email address</p></div>'
	  );
	  
	  window._gaq.push( ['_trackEvent', 'Interaction', 'Subscribe', addr ] );
	   
  	$( '#subscribe' ).scrollTo( '.step-2', {
  	    offset:-20
  	  , duration:200
  	  , easing:'swing'
  	  , onAfter: function() {
  	    window.setTimeout( function() {
  	      $.ajax({
        		  url: '/xhr/subscribe/'
        		, type: 'POST'
        		,	data: 'ajax=true&email=' + addr 
        		,	success: handleSubscribeXHR
        	});
    	  }, 1500 );
  	  }
  	});    
	});
});