import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'nz-demo-table-selection',
  template: `
    <nz-table #nzTable [nzDataSource]="data" [nzPageSize]="10" (nzDataChange)="_displayDataChange($event)" (nzPageIndexChange)="_refreshStatus()" (nzPageSizeChange)="_refreshStatus()">
      <thead nz-thead>
        <tr>
          <th nz-th nzCheckbox>
            <label nz-checkbox [(ngModel)]="_allChecked" [nzIndeterminate]="_indeterminate" (ngModelChange)="_checkAll($event)">
            </label>
          </th>
          <th nz-th><span>Name</span></th>
          <th nz-th><span>Age</span></th>
          <th nz-th><span>Address</span></th>
        </tr>
      </thead>
      <tbody nz-tbody>
        <tr nz-tbody-tr *ngFor="let data of nzTable.data">
          <td nz-td nzCheckbox>
            <label nz-checkbox [(ngModel)]="data.checked" (ngModelChange)="_refreshStatus($event)">
            </label>
          </td>
          <td nz-td>
            <a>{{data.name}}</a>
          </td>
          <td nz-td>{{data.age}}</td>
          <td nz-td>{{data.address}}</td>
        </tr>
      </tbody>
    </nz-table>`,
  styles  : []
})
export class NzDemoTableSelectionComponent {
  _allChecked = false;
  _indeterminate = false;
  _displayData = [];
  data = [ {
    key    : '1',
    name   : 'John Brown',
    age    : 32,
    address: 'New York No. 1 Lake Park',
  }, {
    key    : '2',
    name   : 'Jim Green',
    age    : 42,
    address: 'London No. 1 Lake Park',
  }, {
    key    : '3',
    name   : 'Joe Black',
    age    : 32,
    address: 'Sidney No. 1 Lake Park',
  } ];

  _displayDataChange($event) {
    this._displayData = $event;
    this._refreshStatus();
  }

  _refreshStatus() {
    const allChecked = this._displayData.every(value => value.checked === true);
    const allUnChecked = this._displayData.every(value => !value.checked);
    this._allChecked = allChecked;
    this._indeterminate = (!allChecked) && (!allUnChecked);
  }

  _checkAll(value) {
    if (value) {
      this._displayData.forEach(data => {
        data.checked = true;
      });
    } else {
      this._displayData.forEach(data => {
        data.checked = false;
      });
    }
    this._refreshStatus();
  }
}