import { DeesElement, html, property, customElement, css, type TemplateResult } from '@design.estate/dees-element';
import { idpElementStyles } from './tokens.js';

export interface IIdpSelectOption {
  option: string;
  key: string;
  payload?: string;
}

export interface IIdpSelectEventDetail {
  key: string;
  payload?: string;
  selectedOption: IIdpSelectOption | null;
}

declare global {
  interface HTMLElementTagNameMap {
    'idp-select': IdpSelect;
  }
}

@customElement('idp-select')
export class IdpSelect extends DeesElement {
  public static demo = () => html`
    <idp-select
      label="Organization"
      .options=${[
        { option: 'Lossless GmbH', key: 'lossless', payload: 'lossless' },
        { option: '+ Create new...', key: '__create_new__', payload: '__create_new__' },
      ]}
    ></idp-select>
  `;
  public static demoGroups = ['idp.global v3 primitives'];

  @property({ type: String })
  public accessor label = '';

  @property({ type: String })
  public accessor placeholder = 'Select...';

  @property({ type: Array })
  public accessor options: IIdpSelectOption[] = [];

  @property({ type: Object })
  public accessor selectedOption: IIdpSelectOption | null = null;

  @property({ type: Boolean, reflect: true })
  public accessor disabled = false;

  public static styles = [
    ...idpElementStyles,
    css`
      :host {
        display: block;
      }
      label {
        display: grid;
        gap: 6px;
      }
      .label {
        color: var(--idp-fg);
        font-size: 13px;
        font-weight: 500;
      }
      select {
        width: 100%;
        height: 36px;
        box-sizing: border-box;
        padding: 0 34px 0 10px;
        border: 1px solid var(--idp-border);
        border-radius: 8px;
        outline: none;
        background: var(--idp-card);
        color: var(--idp-fg);
        font-family: var(--idp-font);
        font-size: 13px;
        cursor: pointer;
        transition: border-color 120ms ease, box-shadow 120ms ease;
      }
      select:focus {
        border-color: var(--idp-accent);
        box-shadow: 0 0 0 3px color-mix(in srgb, var(--idp-accent), transparent 86%);
      }
      select:disabled {
        cursor: not-allowed;
        opacity: 0.5;
      }
    `,
  ];

  private handleChange(eventArg: Event) {
    const key = (eventArg.target as HTMLSelectElement).value;
    const selectedOption = this.options.find((optionArg) => optionArg.key === key) || null;
    this.selectedOption = selectedOption;
    this.dispatchEvent(new CustomEvent<IIdpSelectEventDetail>('idp-select', {
      detail: {
        key,
        payload: selectedOption?.payload,
        selectedOption,
      },
      bubbles: true,
      composed: true,
    }));
  }

  public render(): TemplateResult {
    return html`
      <label>
        ${this.label ? html`<span class="label">${this.label}</span>` : html``}
        <select .value=${this.selectedOption?.key || ''} ?disabled=${this.disabled} @change=${this.handleChange}>
          <option value="" disabled>${this.placeholder}</option>
          ${this.options.map((optionArg) => html`
            <option value=${optionArg.key}>${optionArg.option}</option>
          `)}
        </select>
      </label>
    `;
  }
}