import { mdiChevronLeft, mdiChevronRight } from "@mdi/js";
import { html, LitElement, TemplateResult } from "lit";
import { customElement, property, state } from "lit/decorators";
import { HomeAssistant } from "../types";
import "./ha-icon-button";

@customElement("ha-icon-button-prev")
export class HaIconButtonPrev extends LitElement {
  @property({ attribute: false }) public hass?: HomeAssistant;

  @property({ type: Boolean }) public disabled = false;

  @property() public label?: string;

  @state() private _icon = mdiChevronLeft;

  public connectedCallback() {
    super.connectedCallback();

    // wait to check for direction since otherwise direction is wrong even though top level is RTL
    setTimeout(() => {
      this._icon =
        window.getComputedStyle(this).direction === "ltr"
          ? mdiChevronLeft
          : mdiChevronRight;
    }, 100);
  }

  protected render(): TemplateResult {
    return html`
      <ha-icon-button
        .disabled=${this.disabled}
        .label=${this.label || this.hass?.localize("ui.common.back") || "Back"}
        .path=${this._icon}
      ></ha-icon-button>
    `;
  }
}

declare global {
  interface HTMLElementTagNameMap {
    "ha-icon-button-prev": HaIconButtonPrev;
  }
}