/*
 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
 the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
*/

var timer_element = null;
var timer_timeout = null;

var core_basepath = null;
var navigation_element = null;
var replication_element = null;

var convert_duration_to_seconds = function( str )
{
  var ret = 0;
  var parts = new String( str ).split( ':' ).reverse();
  var parts_count = parts.length;
    
  for( var i = 0; i < parts_count; i++ )
  {
    ret += parseInt( parts[i], 10 ) * Math.pow( 60, i );
  }

  return ret;
}

var convert_seconds_to_readable_time = function( value )
{
  var text = [];
  value = parseInt( value );

  var minutes = Math.floor( value / 60 );
  var hours = Math.floor( minutes / 60 );

  if( 0 !== hours )
  {
    text.push( hours + 'h' );
    value -= hours * 60 * 60;
    minutes -= hours * 60;
  }

  if( 0 !== minutes )
  {
    text.push( minutes + 'm' );
    value -= minutes * 60;
  }

  if( 0 !== value )
  {
    text.push( value + 's' );
  }

  return text.join( ' ' );
}

var init_timer = function( next_tick )
{
  if( timer_timeout )
  {
    window.clearTimeout( timer_timeout );
  }
  update_timer( next_tick );
}

var update_timer = function( next_tick )
{
  if( 0 === next_tick )
  {
    replication_fetch_status();
    return false;
  }

  $( 'p .tick', timer_element )
    .text( convert_seconds_to_readable_time( next_tick ) );

  timer_timeout = window.setTimeout
  (
    'update_timer( ' + --next_tick + ' )',
    1000
  );
}

var clear_timer = function()
{
  if( timer_timeout )
  {
    window.clearTimeout( timer_timeout );
    timer_element.hide();
  }
}

var replication_fetch_status = function()
{
  $.ajax
  (
    {
      url : core_basepath + '/replication?command=details&wt=json',
      dataType : 'json',
      beforeSend : function( xhr, settings )
      {
        $( '.refresh-status span', navigation_element )
          .addClass( 'loader' );

        clear_timer();
      },
      success : function( response, text_status, xhr )
      {
        $( '.refresh-status span', navigation_element )
          .removeClass( 'loader' );
                
        var data = response.details;
        var is_slave = 'true' === data.isSlave;

        replication_element
          .addClass( is_slave ? 'slave' : 'master' );

        if( is_slave )
        {
          var error_element = $( '#error', replication_element );

          if( data.slave.ERROR )
          {
            error_element
              .html( data.slave.ERROR )
              .show();
          }
          else
          {
            error_element
              .hide()
              .empty();
          }

          var progress_element = $( '#progress', replication_element );

          var start_element = $( '#start', progress_element );
          $( 'span', start_element )
            .text( data.slave.replicationStartTime );

          var eta_element = $( '#eta', progress_element );
          $( 'span', eta_element )
            .text( convert_seconds_to_readable_time( data.slave.timeRemaining ) );

          var bar_element = $( '#bar', progress_element );
          $( '.files span', bar_element )
            .text( data.slave.numFilesToDownload );
          $( '.size span', bar_element )
            .text( data.slave.bytesToDownload );

          var speed_element = $( '#speed', progress_element );
          $( 'span', speed_element )
            .text( data.slave.downloadSpeed );

          var done_element = $( '#done', progress_element );
          $( '.files span', done_element )
            .text( data.slave.numFilesDownloaded );
          $( '.size span', done_element )
            .text( data.slave.bytesDownloaded );
          $( '.percent span', done_element )
            .text( parseInt(data.slave.totalPercent ) );

          var percent = parseInt( data.slave.totalPercent );
          if( 0 === percent )
          {
            done_element
              .css( 'width', '1px' ); 
          }
          else
          {
            done_element
              .css( 'width', percent + '%' );
          }

          var current_file_element = $( '#current-file', replication_element );
          $( '.file', current_file_element )
            .text( data.slave.currentFile );
          $( '.done', current_file_element )
            .text( data.slave.currentFileSizeDownloaded );
          $( '.total', current_file_element )
            .text( data.slave.currentFileSize );
          $( '.percent', current_file_element )
            .text( parseInt( data.slave.currentFileSizePercent ) );

          if( !data.slave.indexReplicatedAtList )
          {
            data.slave.indexReplicatedAtList = [];
          }

          if( !data.slave.replicationFailedAtList )
          {
            data.slave.replicationFailedAtList = [];
          }

          var iterations_element = $( '#iterations', replication_element );
          var iterations_list = $( '.iterations ul', iterations_element );

          var iterations_data = [];
          var iterations_obj = {};

          for( var i in data.slave.indexReplicatedAtList )
          {
            var date = data.slave.indexReplicatedAtList[i];
            if( !iterations_obj[date] )
            {
              iterations_obj[date] = true;
              iterations_data.push( date );
            }
          }

          for( var i in data.slave.replicationFailedAtList )
          {
            var date = data.slave.replicationFailedAtList[i];
            if( !iterations_obj[date] )
            {
              iterations_obj[date] = true;
              iterations_data.push( date );
            }
          }

          iterations_data.sort().reverse();

          if( 0 !== iterations_data.length )
          {
            var iterations = [];
            for( var i = 0; i < iterations_data.length; i++ )
            {
              iterations.push( '<li data-date="' + iterations_data[i] + '">' + iterations_data[i] + '</li>' );
            }
                        
            iterations_list
              .html( iterations.join( "\n" ) )
              .show();
                        
            $( data.slave.indexReplicatedAtList )
              .each
              (
                function( key, value )
                {
                  $( 'li[data-date="' + value + '"]', iterations_list )
                    .addClass( 'replicated' );
                }
              );
                        
            if( data.slave.indexReplicatedAt )
            {
              $( 'li[data-date="' + data.slave.indexReplicatedAt + '"]', iterations_list )
                .addClass( 'latest' );
            }
                        
            $( data.slave.replicationFailedAtList )
              .each
              (
                function( key, value )
                {
                  $( 'li[data-date="' + value + '"]', iterations_list )
                    .addClass( 'failed' );
                }
              );
                        
            if( data.slave.replicationFailedAt )
            {
              $( 'li[data-date="' + data.slave.replicationFailedAt + '"]', iterations_list )
                .addClass( 'latest' );
            }

            if( 0 !== $( 'li:hidden', iterations_list ).size() )
            {
              $( 'a', iterations_element )
                .show();
            }
            else
            {
              $( 'a', iterations_element )
                .hide();
            }
          }
        }

        var details_element = $( '#details', replication_element );
        var current_type_element = $( ( is_slave ? '.slave' : '.master' ), details_element );

        $( '.version div', current_type_element )
          .html( data.indexVersion );
        $( '.generation div', current_type_element )
          .html( data.generation );
        $( '.size div', current_type_element )
          .html( data.indexSize );
                
        if( is_slave )
        {
          var master_element = $( '.master', details_element );
          $( '.version div', master_element )
            .html( data.slave.masterDetails.indexVersion );
          $( '.generation div', master_element )
            .html( data.slave.masterDetails.generation );
          $( '.size div', master_element )
            .html( data.slave.masterDetails.indexSize );
                    
          if( data.indexVersion !== data.slave.masterDetails.indexVersion )
          {
            $( '.version', details_element )
              .addClass( 'diff' );
          }
          else
          {
            $( '.version', details_element )
              .removeClass( 'diff' );
          }
                    
          if( data.generation !== data.slave.masterDetails.generation )
          {
            $( '.generation', details_element )
              .addClass( 'diff' );
          }
          else
          {
            $( '.generation', details_element )
              .removeClass( 'diff' );
          }
        }

        if( is_slave )
        {
          var settings_element = $( '#settings', replication_element );

          if( data.slave.masterUrl )
          {
            $( '.masterUrl dd', settings_element )
              .html( response.details.slave.masterUrl )
              .parents( 'li' ).show();
          }

          var polling_content = '&nbsp;';
          var polling_ico = 'ico-1';

          if( 'true' === data.slave.isPollingDisabled )
          {
            polling_ico = 'ico-0';

            $( '.disable-polling', navigation_element ).hide();
            $( '.enable-polling', navigation_element ).show();
          }
          else
          {
            $( '.disable-polling', navigation_element ).show();
            $( '.enable-polling', navigation_element ).hide();

            if( data.slave.pollInterval )
            {
              polling_content = '(interval: ' + data.slave.pollInterval + ')';
            }
          }

          $( '.isPollingDisabled dd', settings_element )
            .removeClass( 'ico-0' )
            .removeClass( 'ico-1' )
            .addClass( polling_ico )
            .html( polling_content )
            .parents( 'li' ).show();
                
          if( 'true' === data.slave.isReplicating )
          {
            replication_element
              .addClass( 'replicating' );
                        
            $( '.replicate-now', navigation_element ).hide();
            $( '.abort-replication', navigation_element ).show();
                        
            window.setTimeout( replication_fetch_status, 1000 );
          }
          else
          {
            replication_element
              .removeClass( 'replicating' );
                        
            $( '.replicate-now', navigation_element ).show();
            $( '.abort-replication', navigation_element ).hide();


            if( 'false' === data.slave.isPollingDisabled && data.slave.pollInterval )
            {
              timer_element = $( '.timer', navigation_element );
              approx_element = $( '.approx', timer_element );

              var next_tick = convert_duration_to_seconds( data.slave.pollInterval );
              approx_element.show();

              if( data.slave.nextExecutionAt )
              {
                var nextExecutionAt = new SolrDate( data.slave.nextExecutionAt );
                var currentDate = new SolrDate( data.slave.currentDate );

                if( nextExecutionAt.getTime() > currentDate.getTime() )
                {
                  next_tick = ( nextExecutionAt.getTime() - currentDate.getTime() ) / 1000;
                  approx_element.hide();

                  $( 'small', timer_element )
                    .text( data.slave.nextExecutionAt )
                    .show();
                }
              }

              init_timer( next_tick );

              timer_element
                .show();
            }
          }
        }

        var master_settings_element = $( '#master-settings', replication_element );
        var master_data = is_slave ? data.slave.masterDetails.master : data.master;

        var replication_icon = 'ico-0';
        if( 'true' === master_data.replicationEnabled )
        {
          replication_icon = 'ico-1';

          $( '.disable-replication', navigation_element ).show();
          $( '.enable-replication', navigation_element ).hide();
        }
        else
        {
          $( '.disable-replication', navigation_element ).hide();
          $( '.enable-replication', navigation_element ).show();
        }

        $( '.replicationEnabled dd', master_settings_element )
          .removeClass( 'ico-0' )
          .removeClass( 'ico-1' )
          .addClass( replication_icon )
          .parents( 'li' ).show();

        $( '.replicateAfter dd', master_settings_element )
          .html( master_data.replicateAfter.join( ', ' ) )
          .parents( 'li' ).show();

        if( master_data.confFiles )
        {
          var conf_files = [];
          var conf_data = master_data.confFiles.split( ',' );
                    
          for( var i = 0; i < conf_data.length; i++ )
          {
            var item = conf_data[i];

            if( - 1 !== item.indexOf( ':' ) )
            {
              info = item.split( ':' );
              item = '<abbr title="' + info[0] + ' » ' + info[1] + '">' + ( is_slave ? info[1] : info[0] ) + '</abbr>';
            }

            conf_files.push( item );
          }

          $( '.confFiles dd', master_settings_element )
            .html( conf_files.join( ', ' ) )
            .parents( 'li' ).show();
        }


        $( '.block', replication_element ).last()
          .addClass( 'last' );
      },
      error : function( xhr, text_status, error_thrown )
      {
        $( '#content' )
          .html( 'sorry, no replication-handler defined!' );
      },
      complete : function( xhr, text_status )
      {
      }
    }
  );
}

// #/:core/replication
sammy.get
(
  /^#\/([\w\d-]+)\/(replication)$/,
  function( context )
  {
    core_basepath = this.active_core.attr( 'data-basepath' );
    var content_element = $( '#content' );
        
    $.get
    (
      'tpl/replication.html',
      function( template )
      {
        content_element
          .html( template );
                
        replication_element = $( '#replication', content_element );
        navigation_element = $( '#navigation', replication_element );

        replication_fetch_status();

        $( '#iterations a', content_element )
          .die( 'click' )
          .live
          (
            'click',
            function( event )
            {
              $( this ).parents( '.iterations' )
                .toggleClass( 'expanded' );
                            
              return false;
            }
          );

        $( 'button', navigation_element )
          .die( 'click' )
          .live
          (
            'click',
            function( event )
            {
              var button = $( this );
              var command = button.data( 'command' );

              if( button.hasClass( 'refresh-status' ) && !button.hasClass( 'loader' ) )
              {
                replication_fetch_status();
              }
              else if( command )
              {
                $.get
                (
                  core_basepath + '/replication?command=' + command + '&wt=json',
                  function()
                  {
                    replication_fetch_status();
                  }
                );
              }
              return false;
            }
          );
      }
    );
  }
);