// -- Github Repository --------------------------------------------------------

function GithubRepo( repo ) {
        this.description = repo.description;
        this.forks = repo.forks;
        this.name = repo.name;
        this.open_issues = repo.open_issues;
        this.pushed_at = repo.pushed_at;
        this.url = repo.url;
        this.watchers = repo.watchers;
}

// Parses HTML template
GithubRepo.prototype.toHTML = function () {
        var self = this;

        self.pushed_at = self._parsePushedDate( self.pushed_at ),
        self.url = self._parseURL( self.url );

        return $(
                '<div class="card">'+
                  '<div class="card-content">'+
                    '<span class="card-title activator grey-text text-darken-4">'+self.name+'<i class="mdi-navigation-more-vert right"></i></span>' +
                    '<p>' + self.description + '</p>'+
                    '<p><a href="' + self.url + '" target="_blank">' + self.name + '</a><span class="repo-update"> - Latest commit to <strong>master</strong> on ' + self.pushed_at + '</span>'+
                    '<span class="github-stats right">' +
                        '<a class="repo-stars  tooltipped" target="_blank" href="' + self.url + '/watchers" data-position="bottom" data-tooltip="Stars on repo"><i class="fa fa-star"></i> ' + self.watchers + '</a>' +
                        '<a class="repo-forks  tooltipped" target="_blank" href="' + self.url + '/network" data-position="bottom" data-tooltip="Repo Forks"><i class="fa fa-code-fork"></i> ' + self.forks + '</a>' +
                    '</span>'+
                    '</p>'+
                  '</div>'+
                  '<div class="card-reveal">'+
                    '<span class="card-title grey-text text-darken-4">'+self.name+'<i class="mdi-navigation-close right"></i></span>'+
                    '<p><a href="'+self.url+'#readme" target="_blank">Read more</a></p>'+
                  '</div'+
                  '</div>'
                );
        return $(
                "<div class='github-box'>" +
                        "<div class='github-box-header'>" +
                                "<h3>" +
                                        "<a href='" + self.url + "'>" + self.name + "</a>" +
                                "</h3>" +
                                "<div class='github-stats'>" +
                                        "<a class='repo-stars' title='Stars' data-icon='7' href='" + self.url + "/watchers'>" + self.watchers + "</a>" +
                                        "<a class='repo-forks' title='Forks' data-icon='f' href='" + self.url + "/network'>" + self.forks + "</a>" +
                                        "<a class='repo-issues' title='Issues' data-icon='i' href='" + self.url + "/issues'>" + self.open_issues + "</a>" +
                                "</div>" +
                        "</div>" +
                        "<div class='github-box-content'>" +
                                "<p>" + self.description + " &mdash; <a href='" + self.url + "#readme'>Read More</a></p>" +
                        "</div>" +
                        "<div class='github-box-download'>" +
                                "<p class='repo-update'>Latest commit to <strong>master</strong> on " + self.pushed_at + "</p>" +
                                "<a class='repo-download' title='Download as zip' href='" + self.url + "/zipball/master'><i class=\"icon-download-alt\"></i> Download zip</a>" +
                        "</div>" +
                "</div>");
};

// Parses pushed_at with date format
GithubRepo.prototype._parsePushedDate = function ( pushed_at ) {
        var self = this,
                        date = new Date( pushed_at );

        return date.getDate() + "/" + ( date.getMonth() + 1 ) + "/" + date.getFullYear();
};

// Parses URL to be friendly
GithubRepo.prototype._parseURL = function ( url ) {
        var self = this;

        return url.replace( "api.", "" ).replace( "repos/", "" );
};

// -- Github Plugin ------------------------------------------------------------

function Github( element, options ) {
        var self = this,
                        defaults = {
                                iconStars: true,
                                iconForks: true,
                                iconIssues: false
                        };

        self.element = element;
        self.$container = $( element );
        self.repo = self.$container.attr( "data-repo" );

        self.options = $.extend( {}, defaults, options ) ;

        self._defaults = defaults;

        self.init();
        self.displayIcons();
}

// Initializer
Github.prototype.init = function () {
        var self = this,
                        cached = self.getCache();

        if ( cached !== null ) {
                self.applyTemplate( JSON.parse( cached ) );
        }
        else {
                self.requestData( self.repo );
        }
};

// Display or hide icons
Github.prototype.displayIcons = function () {
        $iconStars = $( ".repo-stars" );
        $iconForks = $( ".repo-forks" );
        $iconIssues = $( ".repo-issues" );

        if ( this.options.iconStars ) {
                $iconStars.css( "display", "inline-block" );
        } else {
                $iconStars.css( "display", "none" );
        }

        if ( this.options.iconForks ) {
                $iconForks.css( "display", "inline-block" );
        } else {
                $iconForks.css( "display", "none" );
        }

        if ( this.options.iconIssues ) {
                $iconIssues.css( "display", "inline-block" );
        } else {
                $iconIssues.css( "display", "none" );
        }
};

// Request repositories from Github
Github.prototype.requestData = function ( repo ) {
        var self = this;

        $.ajax({
                url: "https://api.github.com/repos/" + repo,
                dataType: "jsonp",
                success: function( results ) {
                        var result_data = results.data;

                        // Handle API failures
                        if ( results.meta.status >= 400 && result_data.message ) {
                                self.handleErrorRequest( result_data );
                        }
                        else {
                                self.handleSuccessfulRequest( result_data );
                        }
                }
        });
};

// Handle Errors requests
Github.prototype.handleErrorRequest = function ( result_data ) {
        var self = this;

        console.warn( result_data.message );
        return;
};

// Handle Successful request
Github.prototype.handleSuccessfulRequest = function ( result_data ) {
        var self = this;

        self.applyTemplate( result_data );
        self.setCache( result_data );
};

// Stores repostories in sessionStorage if available
Github.prototype.setCache = function ( result_data ) {
        var self = this;

        // Cache data
        if ( window.sessionStorage ) {
                window.sessionStorage.setItem( "gh-repos:" + self.repo, JSON.stringify( result_data ) );
        }
};

// Grab cached results
Github.prototype.getCache = function() {
        var self = this;

        if ( window.sessionStorage ) {
                return window.sessionStorage.getItem( "gh-repos:" + self.repo );
        }
        else {
                return false;
        }
};

// Apply results to HTML template
Github.prototype.applyTemplate = function ( repo ) {
        var self = this,
                        githubRepo = new GithubRepo( repo ),
                        $widget = githubRepo.toHTML();

        $widget.appendTo( self.$container );
};

// -- Attach plugin to jQuery's prototype --------------------------------------

;( function ( $, window, undefined ) {

        $.fn.github = function ( options ) {
                return this.each(function () {
                        if ( !$( this ).data( "plugin_github" ) ) {
                                $( this ).data( "plugin_github", new Github( this, options ) );
                        }
                });
        };

}( window.jQuery || window.Zepto, window ) );