jQuery(function($) {
  var $el = $('.search-here');

  // Check for config from url query string
  // (this allows us to point to specific data sources backends)
  var config = recline.View.parseQueryString(decodeURIComponent(window.location.search));
  if (config.backend) {
    setupMoreComplexExample(config);
    return;
  }

  // the simple example case

  // Create our Recline Dataset
  // We'll just use some sample local data (see end of this file)
  var dataset = new recline.Model.Dataset({
    records: sampleData
  });

  // Set up the search View
  
  // We give it a custom template for rendering the example records
  var template = ' \
    <div class="record"> \
      <h3> \
        {{title}} <em>by {{Author}}</em> \
      </h3> \
      <p>{{description}}</p> \
      <p><code>${{price}}</code></p> \
    </div> \
  ';
  var searchView = new SearchView({
    el: $el,
    model: dataset,
    template: template 
  });
  searchView.render();

  // Optional - we configure the initial query a bit and set up facets
  dataset.queryState.set({
      size: 10
    },
    {silent: true}
  );
  dataset.queryState.addFacet('Author');
  // Now do the first query
  // After this point the Search View will take over handling queries
  dataset.query();
});


// Simple Search View
//
// Pulls together various Recline UI components and the central Dataset and Query (state) object
//
// Plus support for customization e.g. of template for list of results
//
// 
//      var view = new SearchView({
//        el: $('some-element'),
//        model: dataset
//        template: mustache-template-or-function
//      });
var SearchView = Backbone.View.extend({
  initialize: function(options) {
    this.el = $(this.el);
    _.bindAll(this, 'render');
    this.recordTemplate = options.template || this.defaultTemplate;
    this.model.records.bind('reset', this.render);
    this.templateResults = options.template;
  },

  template: ' \
    <div class="controls"> \
      <div class="query-here"></div> \
    </div> \
    <div class="body"> \
      <div class="sidebar"></div> \
      <div class="results"> \
        {{{results}}} \
      </div> \
    </div> \
    <div class="pager-here"></div> \
  ',
 
  render: function() {
    var results = '';
    if (_.isFunction(this.templateResults)) {
      var results = _.map(this.model.records.toJSON(), this.templateResults).join('\n');
    } else {
      // templateResults is just for one result ...
      var tmpl = '{{#records}}' + this.templateResults + '{{/records}}'; 
      var results = Mustache.render(tmpl, {
        records: this.model.records.toJSON()
      });
    }
    var html = Mustache.render(this.template, {
      results: results
    });
    this.el.html(html);

    var view = new recline.View.FacetViewer({
      model: this.model
    });
    view.render();
    this.el.find('.sidebar').append(view.el);

    var pager = new recline.View.Pager({
      model: this.model.queryState
    });
    this.el.find('.pager-here').append(pager.el);

    var queryEditor = new recline.View.QueryEditor({
      model: this.model.queryState
    });
    this.el.find('.query-here').append(queryEditor.el);
  }
});

// --------------------------------------------------------
// Stuff very specific to this demo

function setupMoreComplexExample(config) {
  var $el = $('.search-here');
  var dataset = new recline.Model.Dataset(config);
  // async as may be fetching remote
  dataset.fetch().done(function() {
    if (dataset.get('url').indexOf('openspending') === -1) {
      // generic template function
      var template = function(record) {
        var template = '<div class="record"> \
          <ul> \
           {{#data}} \
           <li>{{key}}: {{value}}</li> \
           {{/data}} \
        </div> \
        ';
        var data = _.map(_.keys(record), function(key) {
          return { key: key, value: record[key] };
        });
        return Mustache.render(template, {
          data: data
        });
      }
    } else {
      // generic template function
      var template = function(record) {
        record['time'] = record['time.label_facet']
        var template = '<div class="record"> \
          <h3> \
            <a href="http://openspending.org/{{record.dataset}}/entries/{{record.id}}">{{record.dataset}} {{record.time}}</a> \
            &ndash; <img src="http://openspending.org/static/img/icons/cd_16x16.png" /> {{amount_formatted}} \
          </h3> \
          <ul> \
           {{#data}} \
           <li>{{key}}: {{value}}</li> \
           {{/data}} \
        </div> \
        ';
        var data = [];
        _.each(_.keys(record), function(key) {
          if (key !='_id' && key != 'id') {
            data.push({ key: key, value: record[key] });
          }
        });
        return Mustache.render(template, {
          record: record,
          amount_formatted: formatAmount(record['amount']),
          data: data
        });
      }
    }

    var searchView = new SearchView({
      el: $el,
      model: dataset,
      template: template 
    });
    searchView.render();

    dataset.queryState.set({
        size: 10
      },
      {silent: true}
    );
    if (dataset.get('url').indexOf('openspending') != -1) {
      dataset.queryState.addFacet('dataset');
    }
    dataset.query();
  });
};

var sampleData = [
  {
    title: 'War and Peace',
    description: 'The epic tale of love, war and history',
    Author: 'Tolstoy',
    price: 7.99
  },
  {
    title: 'Anna Karenina',
    description: 'How things go wrong in love and ultimately lead to suicide. This is why you should not have affairs, girls!',
    Author: 'Tolstoy',
    price: 8.50
  },
  {
    title: "Fathers and Sons",
    description: "Another 19th century Russian novel",
    Author: "Turgenev",
    price: 11
  }
];

var formatAmount = function (num) {
  var billion = 1000000000;
  var million = 1000000;
  var thousand = 1000;
  var numabs = Math.abs(num);
  if (numabs > billion) {
    return (num / billion).toFixed(0) + 'bn';
  }
  if (numabs > (million / 2)) {
    return (num / million).toFixed(0) + 'm';
  }
  if (numabs > thousand) {
    return (num / thousand).toFixed(0) + 'k';
  } else {
    return num.toFixed(0);
  }
};