/*

* # Semantic - Visit
* http://github.com/semantic-org/semantic-ui/
*
*
* Copyright 2014 Contributor
* Released under the MIT license
* http://opensource.org/licenses/MIT
*
*/

;(function ($, window, document, undefined) {

$.visit = $.fn.visit = function(parameters) {

var
  $allModules     = $.isFunction(this)
      ? $(window)
      : $(this),
  moduleSelector  = $allModules.selector || '',

  time            = new Date().getTime(),
  performance     = [],

  query           = arguments[0],
  methodInvoked   = (typeof query == 'string'),
  queryArguments  = [].slice.call(arguments, 1),
  returnedValue
;
$allModules
  .each(function() {
    var
      settings        = $.extend(true, {}, $.fn.visit.settings, parameters),

      error           = settings.error,
      namespace       = settings.namespace,

      eventNamespace  = '.' + namespace,
      moduleNamespace = namespace + '-module',

      $module         = $(this),
      $displays       = $(),

      element         = this,
      instance        = $module.data(moduleNamespace),
      module
    ;
    module = {

      initialize: function() {
        if(settings.count) {
          module.store(settings.key.count, settings.count);
        }
        else if(settings.id) {
          module.add.id(settings.id);
        }
        else if(settings.increment && methodInvoked !== 'increment') {
          module.increment();
        }
        module.add.display($module);
        module.instantiate();
      },

      instantiate: function() {
        module.verbose('Storing instance of visit module', module);
        instance = module;
        $module
          .data(moduleNamespace, module)
        ;
      },

      destroy: function() {
        module.verbose('Destroying instance');
        $module
          .removeData(moduleNamespace)
        ;
      },

      increment: function(id) {
        var
          currentValue = module.get.count(),
          newValue     = +(currentValue) + 1
        ;
        if(id) {
          module.add.id(id);
        }
        else {
          if(newValue > settings.limit && !settings.surpass) {
            newValue = settings.limit;
          }
          module.debug('Incrementing visits', newValue);
          module.store(settings.key.count, newValue);
        }
      },

      decrement: function(id) {
        var
          currentValue = module.get.count(),
          newValue     = +(currentValue) - 1
        ;
        if(id) {
          module.remove.id(id);
        }
        else {
          module.debug('Removing visit');
          module.store(settings.key.count, newValue);
        }
      },

      get: {
        count: function() {
          return +(module.retrieve(settings.key.count)) || 0;
        },
        idCount: function(ids) {
          ids = ids || module.get.ids();
          return ids.length;
        },
        ids: function(delimitedIDs) {
          var
            idArray = []
          ;
          delimitedIDs = delimitedIDs || module.retrieve(settings.key.ids);
          if(typeof delimitedIDs === 'string') {
            idArray = delimitedIDs.split(settings.delimiter);
          }
          module.verbose('Found visited ID list', idArray);
          return idArray;
        },
        storageOptions: function(data) {
          var
            options = {}
          ;
          if(settings.expires) {
            options.expires = settings.expires;
          }
          if(settings.domain) {
            options.domain = settings.domain;
          }
          if(settings.path) {
            options.path = settings.path;
          }
          return options;
        }
      },

      has: {
        visited: function(id, ids) {
          var
            visited = false
          ;
          ids = ids || module.get.ids();
          if(id !== undefined && ids) {
            $.each(ids, function(index, value){
              if(value == id) {
                visited = true;
              }
            });
          }
          return visited;
        }
      },

      set: {
        count: function(value) {
          module.store(settings.key.count, value);
        },
        ids: function(value) {
          module.store(settings.key.ids, value);
        }
      },

      reset: function() {
        module.store(settings.key.count, 0);
        module.store(settings.key.ids, null);
      },

      add: {
        id: function(id) {
          var
            currentIDs = module.retrieve(settings.key.ids),
            newIDs = (currentIDs === undefined || currentIDs === '')
              ? id
              : currentIDs + settings.delimiter + id
          ;
          if( module.has.visited(id) ) {
            module.debug('Unique content already visited, not adding visit', id, currentIDs);
          }
          else if(id === undefined) {
            module.debug('ID is not defined');
          }
          else {
            module.debug('Adding visit to unique content', id);
            module.store(settings.key.ids, newIDs);
          }
          module.set.count( module.get.idCount() );
        },
        display: function(selector) {
          var
            $element = $(selector)
          ;
          if($element.size() > 0 && !$.isWindow($element[0])) {
            module.debug('Updating visit count for element', $element);
            $displays = ($displays.size() > 0)
              ? $displays.add($element)
              : $element
            ;
          }
        }
      },

      remove: {
        id: function(id) {
          var
            currentIDs = module.get.ids(),
            newIDs     = []
          ;
          if(id !== undefined && currentIDs !== undefined) {
            module.debug('Removing visit to unique content', id, currentIDs);
            $.each(currentIDs, function(index, value){
              if(value !== id) {
                newIDs.push(value);
              }
            });
            newIDs = newIDs.join(settings.delimiter);
            module.store(settings.key.ids, newIDs );
          }
          module.set.count( module.get.idCount() );
        }
      },

      check: {
        limit: function(value) {
          value = value || module.get.count();
          if(settings.limit) {
            if(value >= settings.limit) {
              module.debug('Pages viewed exceeded limit, firing callback', value, settings.limit);
              $.proxy(settings.onLimit, element)(value);
            }
            module.debug('Limit not reached', value, settings.limit);
            $.proxy(settings.onChange, element)(value);
          }
          module.update.display(value);
        }
      },

      update: {
        display: function(value) {
          value = value || module.get.count();
          if($displays.size() > 0) {
            module.debug('Updating displayed view count', $displays);
            $displays.html(value);
          }
        }
      },

      store: function(key, value) {
        var
          options = module.get.storageOptions(value)
        ;
        if(settings.storageMethod == 'localstorage' && window.localStorage !== undefined) {
          window.localStorage.setItem(key, value);
          module.debug('Value stored using local storage', key, value);
        }
        else if($.cookie !== undefined) {
          $.cookie(key, value, options);
          module.debug('Value stored using cookie', key, value, options);
        }
        else {
          module.error(error.noCookieStorage);
          return;
        }
        if(key == settings.key.count) {
          module.check.limit(value);
        }
      },
      retrieve: function(key, value) {
        var
          storedValue
        ;
        if(settings.storageMethod == 'localstorage' && window.localStorage !== undefined) {
          storedValue = window.localStorage.getItem(key);
        }
        // get by cookie
        else if($.cookie !== undefined) {
          storedValue = $.cookie(key);
        }
        else {
          module.error(error.noCookieStorage);
        }
        if(storedValue == 'undefined' || storedValue == 'null' || storedValue === undefined || storedValue === null) {
          storedValue = undefined;
        }
        return storedValue;
      },

      setting: function(name, value) {
        if( $.isPlainObject(name) ) {
          $.extend(true, settings, name);
        }
        else if(value !== undefined) {
          settings[name] = value;
        }
        else {
          return settings[name];
        }
      },
      internal: function(name, value) {
        module.debug('Changing internal', name, value);
        if(value !== undefined) {
          if( $.isPlainObject(name) ) {
            $.extend(true, module, name);
          }
          else {
            module[name] = value;
          }
        }
        else {
          return module[name];
        }
      },
      debug: function() {
        if(settings.debug) {
          if(settings.performance) {
            module.performance.log(arguments);
          }
          else {
            module.debug = Function.prototype.bind.call(console.info, console, settings.name + ':');
            module.debug.apply(console, arguments);
          }
        }
      },
      verbose: function() {
        if(settings.verbose && settings.debug) {
          if(settings.performance) {
            module.performance.log(arguments);
          }
          else {
            module.verbose = Function.prototype.bind.call(console.info, console, settings.name + ':');
            module.verbose.apply(console, arguments);
          }
        }
      },
      error: function() {
        module.error = Function.prototype.bind.call(console.error, console, settings.name + ':');
        module.error.apply(console, arguments);
      },
      performance: {
        log: function(message) {
          var
            currentTime,
            executionTime,
            previousTime
          ;
          if(settings.performance) {
            currentTime   = new Date().getTime();
            previousTime  = time || currentTime;
            executionTime = currentTime - previousTime;
            time          = currentTime;
            performance.push({
              'Name'           : message[0],
              'Arguments'      : [].slice.call(message, 1) || '',
              'Element'        : element,
              'Execution Time' : executionTime
            });
          }
          clearTimeout(module.performance.timer);
          module.performance.timer = setTimeout(module.performance.display, 100);
        },
        display: function() {
          var
            title = settings.name + ':',
            totalTime = 0
          ;
          time = false;
          clearTimeout(module.performance.timer);
          $.each(performance, function(index, data) {
            totalTime += data['Execution Time'];
          });
          title += ' ' + totalTime + 'ms';
          if(moduleSelector) {
            title += ' \'' + moduleSelector + '\'';
          }
          if($allModules.size() > 1) {
            title += ' ' + '(' + $allModules.size() + ')';
          }
          if( (console.group !== undefined || console.table !== undefined) && performance.length > 0) {
            console.groupCollapsed(title);
            if(console.table) {
              console.table(performance);
            }
            else {
              $.each(performance, function(index, data) {
                console.log(data['Name'] + ': ' + data['Execution Time']+'ms');
              });
            }
            console.groupEnd();
          }
          performance = [];
        }
      },
      invoke: function(query, passedArguments, context) {
        var
          object = instance,
          maxDepth,
          found,
          response
        ;
        passedArguments = passedArguments || queryArguments;
        context         = element         || context;
        if(typeof query == 'string' && object !== undefined) {
          query    = query.split(/[\. ]/);
          maxDepth = query.length - 1;
          $.each(query, function(depth, value) {
            var camelCaseValue = (depth != maxDepth)
              ? value + query[depth + 1].charAt(0).toUpperCase() + query[depth + 1].slice(1)
              : query
            ;
            if( $.isPlainObject( object[camelCaseValue] ) && (depth != maxDepth) ) {
              object = object[camelCaseValue];
            }
            else if( object[camelCaseValue] !== undefined ) {
              found = object[camelCaseValue];
              return false;
            }
            else if( $.isPlainObject( object[value] ) && (depth != maxDepth) ) {
              object = object[value];
            }
            else if( object[value] !== undefined ) {
              found = object[value];
              return false;
            }
            else {
              return false;
            }
          });
        }
        if ( $.isFunction( found ) ) {
          response = found.apply(context, passedArguments);
        }
        else if(found !== undefined) {
          response = found;
        }
        if($.isArray(returnedValue)) {
          returnedValue.push(response);
        }
        else if(returnedValue !== undefined) {
          returnedValue = [returnedValue, response];
        }
        else if(response !== undefined) {
          returnedValue = response;
        }
        return found;
      }
    };
    if(methodInvoked) {
      if(instance === undefined) {
        module.initialize();
      }
      module.invoke(query);
    }
    else {
      if(instance !== undefined) {
        module.destroy();
      }
      module.initialize();
    }

  })
;
return (returnedValue !== undefined)
  ? returnedValue
  : this
;

};

$.fn.visit.settings = {

name          : 'Visit',

debug         : false,
verbose       : true,
performance   : true,

namespace     : 'visit',

increment     : false,
surpass       : false,
count         : false,
limit         : false,

delimiter     : '&',
storageMethod : 'localstorage',

key           : {
  count : 'visit-count',
  ids   : 'visit-ids'
},

expires       : 30,
domain        : false,
path          : '/',

onLimit       : function() {},
onChange      : function() {},

error         : {
  method          : 'The method you called is not defined',
  missingPersist  : 'Using the persist setting requires the inclusion of PersistJS',
  noCookieStorage : 'The default storage cookie requires $.cookie to be included.'
}

};

})( jQuery, window , document );