/**
 * yvan.yvgrid.selection.js
 * @author luoyifan
 * 2019-07-16
 */
'use strict';
(function ($) {

  /**
   * 获取指定的行编号的对应数据
   * 如果不设置参数就获取当前或被选中的行数据
   */
  function getSelected($dom, rowIndex) {
    if ($.type(rowIndex) === 'undefined') {
      rowIndex = getSelectedRowIndex($dom);
    }

    return $dom.jqxGrid('getrowdata', rowIndex);
  }

  /**
   * 获取当前选中的行编号
   */
  function getSelectedRowIndex($dom) {
    return $dom.jqxGrid('selectedrowindex');
    //var state = $.data($dom[0], 'yvgrid');
    //var option = state.options;
    //return option.selectedRowId;
  }

  function onSelect(event, targetBoundIndex) {
    var $dom = $(this);

    //点击的列是__CB__ 就忽略
    if (event && event.args &&
      event.args.column &&
      event.args.column.datafield === '__CB__') {
      $.fn.yvgrid.selection.toggleCheckbox($dom, targetBoundIndex);
      return;
    }

    //检查跳转目标是否有效
    var data = getSelected.call(this, $dom, targetBoundIndex);
    if ($.type(data) === 'undefined' || $.type(data.boundindex) === 'undefined') {
      return;
    }

    var state = $.data($dom[0], 'yvgrid');
    var option = state.options;
    var oldIndex = getSelectedRowIndex($dom);

    if ($dom.yvgrid('isEditing') && oldIndex === targetBoundIndex) {
      //编辑中的表格，如果跳转目标与当前行一致，就取消跳转
      return;
    }
    //console.log('onSelect type:' + event.type + ', oldIndex:' + oldIndex + ', newIndex:' + targetBoundIndex);

    //如果是 bindingcomplete 事件（切换数据源）造成的切换行动作, 就不用检测是否允许跳转了
    if (event.type !== 'bindingcomplete') {
      //询问 edit 是否取消 select 动作
      var ret = $.fn.yvgrid.edit.beforeSelect.call(this, event, targetBoundIndex);
      if (ret === false) {
        return;
      }

      if ($.type(option.onBeforeSelect) === 'function') {
        //询问外部程序，是否取消 select 动作
        ret = option.onBeforeSelect.call(this, targetBoundIndex, oldIndex, event);
        if (ret === false) {
          return;
        }
      }
    }

    //跳转行
    $dom.jqxGrid('unselectrow', oldIndex);
    $dom.jqxGrid('selectrow', targetBoundIndex);
    $dom.jqxGrid('ensurerowvisible', targetBoundIndex);

    //通知跳转完毕
    if ($.type(option.onSelect) === 'function') {
      option.onSelect.call(this, targetBoundIndex, data, event);
    }

    if ($.type(option.onSelectRow) === 'function') {
      option.onSelectRow.call(this, targetBoundIndex, data, event);
    }
  }

  function hideCheckboxColumn(event) {
    if (!$(this).jqxGrid('editable')) {
      $(this).jqxGrid('hidecolumn', '_checkboxcolumn');
    }
  }

  $.extend($.fn.yvgrid.methods, {

    /**
     * 获取指定的行编号的对应数据
     * 如果不设置参数就获取当前或被选中的行数据
     */
    rowData: function($dom){
      return $dom.jqxGrid('getrows');
    },
    currentRowData: getSelected,
    getSelected: getSelected,

    /**
     * 获取当前选中的行编号
     */
    getSelectedRowIndex: getSelectedRowIndex,

    /**
     * 选择一行数据
     */
    selectRow: function (jq, rowIndex) {
      jq.each(function () {
        onSelect.call(this, { type: 'api' }, rowIndex);
      });
    },

  });

  $.fn.yvgrid.selection = {

    setCheckboxById: function ($dom, id, value) {
      var state = $.data($dom[0], 'yvgrid');
      if (!state) return;

      $dom.jqxGrid('setcellvaluebyid', id, "__CB__", value);
      var option = state.options;

      if ($.type(option.onCheckedChange) === 'function') {
        var row = $dom.jqxGrid('getrowdatabyid', id);
        if (row) {
          option.onCheckedChange.call($dom[0], id, value, row);
        }
      }
    },
    setCheckbox: function ($dom, targetBoundIndex, value) {
      var state = $.data($dom[0], 'yvgrid');
      if (!state) return;

      $dom.jqxGrid('setcellvalue', targetBoundIndex, "__CB__", value);
      var option = state.options;

      if ($.type(option.onCheckedChange) === 'function') {
        var id = $dom.jqxGrid('getrowid', targetBoundIndex);
        var row = $dom.jqxGrid('getrowdata', targetBoundIndex);
        if (row) {
          option.onCheckedChange.call($dom[0], id, value, row);
        }
      }
    },
    getCheckbox: function ($dom, targetBoundIndex) {
      return $dom.jqxGrid('getcellvalue', targetBoundIndex, "__CB__");
    },
    toggleCheckbox: function ($dom, targetBoundIndex) {
      var value = $.fn.yvgrid.selection.getCheckbox($dom, targetBoundIndex);
      if (value) {
        $.fn.yvgrid.selection.setCheckbox($dom, targetBoundIndex, false);
      } else {
        $.fn.yvgrid.selection.setCheckbox($dom, targetBoundIndex, true);
      }
    },

    handlekeyboardnavigation: function (event) {
      switch (event.keyCode) {
        case 33:
        case 34:
          if (event.keyCode === 33) {
            //page up
          } else if (event.keyCode === 40) {
            //page down
          }
          break;

        case 35:
        case 36:
          if (event.target.tagName === 'INPUT') {
            //输入框里面按下的 home/end 键忽略
            return;
          }

        case 38:
        case 40:
          var $dom = $(this.element);
          var rowindex = getSelectedRowIndex($dom);
          var vi = $dom.jqxGrid('getrowvisibleindex', rowindex);
          if (event.keyCode === 38) {
            //index--;  //上
            vi--;

          } else if (event.keyCode === 40) {
            //index++;  //下
            vi++;

          } else if (event.keyCode === 36) {
            //home
            vi = 0;

          } else if (event.keyCode === 35) {
            //end
            vi = $dom.jqxGrid('getdisplayrows').length - 1;
          }
          var boundIndex = $dom.jqxGrid('getrowboundindex', vi);
          onSelect.call(this.element, event, boundIndex);
          return true;
      }
    },

    gridOption: function ($dom, easyuiOpt, jqxOpt) {
      $.extend(jqxOpt, {
        selectionmode: 'checkbox'
      });
      delete jqxOpt.onBeforeSelect;
      delete jqxOpt.onSelect;
      delete jqxOpt.rownumbers;
      delete jqxOpt.loadComplete;

      $dom.on('initialized', function (event) {
        hideCheckboxColumn.call(this, event);
      });

      $dom.on('bindingcomplete', function (event) {
        hideCheckboxColumn.call(this, event);
        var $grid = $(this);

        if ($.type(easyuiOpt.loadComplete) === 'function') {
          easyuiOpt.loadComplete.call(this, arguments);
        }

        if (easyuiOpt.autoSizeColumns) {
          $grid.jqxGrid('autoresizecolumns', 'all');
        }

        if (easyuiOpt.rownumbers) {
          if (!easyuiOpt.editable) {
            $grid.jqxGrid('autoresizecolumn', '__NO__', 'all');
          }
        }

        if (easyuiOpt.checkbox) {
          $grid.jqxGrid('setcolumnproperty', '__CB__', 'width', 40);
        }

        var source = $grid.jqxGrid('source')._source;

        //默认选中第一行
        var newIndex = undefined;
        if (source.records) {
          source.records.every(function (item) {
            newIndex = item.boundindex;
            return false;
          });
        }
        if ($.type(newIndex) !== 'undefined') {
          onSelect.call(this, event, newIndex);
        }
      });

      $dom.on('cellclick', function (event) {
        onSelect.call(this, event, event.args.rowindex);
      });
    }

  };

})(jQuery);