import { HassEntity } from "home-assistant-js-websocket";
import { css, CSSResultGroup, html, LitElement, nothing } from "lit";
import { customElement, property } from "lit/decorators";
import "../../../components/ha-date-input";
import "../../../components/ha-time-input";
import { isUnavailableState, UNKNOWN } from "../../../data/entity";
import {
  setInputDateTimeValue,
  stateToIsoDateString,
} from "../../../data/input_datetime";
import type { HomeAssistant } from "../../../types";

@customElement("more-info-input_datetime")
class MoreInfoInputDatetime extends LitElement {
  @property({ attribute: false }) public hass!: HomeAssistant;

  @property({ attribute: false }) public stateObj?: HassEntity;

  protected render() {
    if (!this.stateObj) {
      return nothing;
    }

    return html`
      ${this.stateObj.attributes.has_date
        ? html`
            <ha-date-input
              .locale=${this.hass.locale}
              .value=${stateToIsoDateString(this.stateObj)}
              .disabled=${isUnavailableState(this.stateObj.state)}
              @value-changed=${this._dateChanged}
            >
            </ha-date-input>
          `
        : ``}
      ${this.stateObj.attributes.has_time
        ? html`
            <ha-time-input
              .value=${this.stateObj.state === UNKNOWN
                ? ""
                : this.stateObj.attributes.has_date
                  ? this.stateObj.state.split(" ")[1]
                  : this.stateObj.state}
              .locale=${this.hass.locale}
              .disabled=${isUnavailableState(this.stateObj.state)}
              @value-changed=${this._timeChanged}
              @click=${this._stopEventPropagation}
            ></ha-time-input>
          `
        : ``}
    `;
  }

  private _stopEventPropagation(ev: Event): void {
    ev.stopPropagation();
  }

  private _timeChanged(ev: CustomEvent<{ value: string }>): void {
    setInputDateTimeValue(
      this.hass!,
      this.stateObj!.entity_id,
      ev.detail.value,
      this.stateObj!.attributes.has_date
        ? this.stateObj!.state.split(" ")[0]
        : undefined
    );
  }

  private _dateChanged(ev: CustomEvent<{ value: string }>): void {
    setInputDateTimeValue(
      this.hass!,
      this.stateObj!.entity_id,
      this.stateObj!.attributes.has_time
        ? this.stateObj!.state.split(" ")[1]
        : undefined,
      ev.detail.value
    );
  }

  static get styles(): CSSResultGroup {
    return css`
      :host {
        display: flex;
        align-items: center;
        justify-content: flex-end;
      }
      ha-date-input + ha-time-input {
        margin-left: 4px;
        margin-inline-start: 4px;
        margin-inline-end: initial;
      }
    `;
  }
}

declare global {
  interface HTMLElementTagNameMap {
    "more-info-input_datetime": MoreInfoInputDatetime;
  }
}
