import { BaseDialog, IDialogConfiguration } from '@microsoft/sp-dialog';
import {
  IExpiryConfig,
  IExpiryColumnRule,
  IExpiryValueRule,
  normalizeConfig
} from '../../common/ExpiryModels';
import * as strings from 'ExpiryIndicatorCommandSetStrings';

export class ExpirySettingsDialog extends BaseDialog {
  private _config: IExpiryConfig;
  private _save: (config: IExpiryConfig) => Promise<void>;

  public constructor(config: IExpiryConfig, save: (config: IExpiryConfig) => Promise<void>) {
    super();
    this._config = config;
    this._save = save;
  }

  public render(): void {
    this.domElement.innerHTML =
      '<div style="max-width:760px;padding:20px;font-family:Segoe UI,Arial,sans-serif">' +
        '<h2 style="margin-top:0">' + strings.SettingsTitle + '</h2>' +
        '<div style="display:grid;grid-template-columns:1fr 1fr;gap:12px">' +
          this._input('baseField', strings.BaseField) +
          this._input('expiryField', strings.ExpiryField) +
          this._input('lifetimeValue', strings.DefaultLifetimeValue, 'number') +
          '<label>' + strings.DefaultLifetimeUnit +
            '<select data-field="lifetimeUnit" style="display:block;width:100%;padding:6px;margin-top:4px">' +
              '<option value="days">days</option><option value="months">months</option><option value="years">years</option>' +
            '</select>' +
          '</label>' +
        '</div>' +
        '<label style="display:block;margin-top:12px">' + strings.DefaultColumnRulesJson +
          '<textarea data-field="defaultColumnRule" rows="10" style="display:block;width:100%;box-sizing:border-box;font-family:Consolas,monospace;margin-top:4px"></textarea>' +
        '</label>' +
        '<label style="display:block;margin-top:12px">' + strings.RulesJson +
          '<textarea data-field="rules" rows="12" style="display:block;width:100%;box-sizing:border-box;font-family:Consolas,monospace;margin-top:4px"></textarea>' +
        '</label>' +
        '<label style="display:block;margin-top:12px"><input data-field="confirmExtension" type="checkbox"> ' +
          strings.ConfirmExtension + '</label>' +
        '<label style="display:block;margin-top:12px">' + strings.NullText +
          '<input data-field="nullText" type="text" style="display:block;width:100%;box-sizing:border-box;padding:6px;margin-top:4px">' +
        '</label>' +
        '<div data-field="error" style="color:#a4262c;min-height:20px;margin-top:10px"></div>' +
        '<div style="text-align:right;margin-top:12px">' +
          '<button data-action="cancel" type="button" style="padding:7px 18px;margin-right:8px">' + strings.Cancel + '</button>' +
          '<button data-action="save" type="button" style="padding:7px 18px;background:#0078d4;color:#fff;border:0">' + strings.Save + '</button>' +
        '</div>' +
      '</div>';

    this._setValue('baseField', this._config.baseField);
    this._setValue('expiryField', this._config.expiryField);
    this._setValue('lifetimeValue', String(this._config.default.lifeTime.value));
    this._setValue('lifetimeUnit', this._config.default.lifeTime.unit);
    this._setValue('defaultColumnRule', JSON.stringify(this._config.default.columnRule, undefined, 2));
    this._setValue('rules', JSON.stringify(this._config.rules, undefined, 2));
    this._setValue('nullText', this._config.nullText);
    (this._field('confirmExtension') as HTMLInputElement).checked = this._config.confirmExtension;

    (this.domElement.querySelector('[data-action="cancel"]') as HTMLButtonElement).onclick = (): void => {
      this.close();
    };
    (this.domElement.querySelector('[data-action="save"]') as HTMLButtonElement).onclick = (): void => {
      this._saveForm();
    };
  }

  public getConfig(): IDialogConfiguration {
    return { isBlocking: true };
  }

  private _saveForm(): void {
    const saveButton: HTMLButtonElement = this.domElement.querySelector('[data-action="save"]') as HTMLButtonElement;
    const errorElement: HTMLElement = this._field('error') as HTMLElement;
    errorElement.textContent = '';

    try {
      const defaultColumnRule: IExpiryColumnRule[] = JSON.parse(this._value('defaultColumnRule'));
      const rules: IExpiryValueRule[] = JSON.parse(this._value('rules'));
      const config: IExpiryConfig = normalizeConfig({
        baseField: this._value('baseField').trim(),
        expiryField: this._value('expiryField').trim(),
        default: {
          lifeTime: {
            value: Number(this._value('lifetimeValue')),
            unit: this._value('lifetimeUnit')
          },
          columnRule: defaultColumnRule
        },
        rules: rules,
        nullText: this._value('nullText'),
        confirmExtension: (this._field('confirmExtension') as HTMLInputElement).checked
      });

      saveButton.disabled = true;
      this._save(config).then((): void => {
        this._config = config;
        this.close();
      }).catch((error: Error): void => {
        saveButton.disabled = false;
        errorElement.textContent = error && error.message ? error.message : String(error);
      });
    } catch (error) {
      errorElement.textContent = strings.InvalidJson + ': ' + (error && error.message ? error.message : String(error));
    }
  }

  private _input(field: string, label: string, type?: string): string {
    return '<label>' + label + '<input data-field="' + field + '" type="' + (type || 'text') +
      '" style="display:block;width:100%;box-sizing:border-box;padding:6px;margin-top:4px"></label>';
  }

  private _field(name: string): Element {
    return this.domElement.querySelector('[data-field="' + name + '"]') as Element;
  }

  private _value(name: string): string {
    return (this._field(name) as HTMLInputElement).value;
  }

  private _setValue(name: string, value: string): void {
    (this._field(name) as HTMLInputElement).value = value;
  }
}