import { consume } from "@lit/context";
import type { HassEntity } from "home-assistant-js-websocket";
import { css, html, LitElement, nothing } from "lit";
import { customElement, property, state } from "lit/decorators";
import { transform } from "../../../common/decorators/transform";
import "../../../components/ha-date-input";
import "../../../components/ha-time-input";
import { apiContext, internationalizationContext } from "../../../data/context";
import { UNAVAILABLE, UNKNOWN } from "../../../data/entity/entity";
import {
  setInputDateTimeValue,
  stateToIsoDateString,
} from "../../../data/input_datetime";
import type { FrontendLocaleData } from "../../../data/translation";
import type {
  HomeAssistantApi,
  HomeAssistantInternationalization,
  ValueChangedEvent,
} from "../../../types";

@customElement("more-info-input_datetime")
class MoreInfoInputDatetime extends LitElement {
  @property({ attribute: false }) public stateObj?: HassEntity;

  @state()
  @consume({ context: internationalizationContext, subscribe: true })
  @transform<HomeAssistantInternationalization, FrontendLocaleData>({
    transformer: ({ locale }) => locale,
  })
  private _locale!: FrontendLocaleData;

  @state()
  @consume({ context: apiContext, subscribe: true })
  private _api!: HomeAssistantApi;

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

    return html`
      ${this.stateObj.attributes.has_date
        ? html`
            <ha-date-input
              .locale=${this._locale}
              .value=${stateToIsoDateString(this.stateObj)}
              .disabled=${this.stateObj.state === UNAVAILABLE}
              @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=${this._locale}
              .disabled=${this.stateObj.state === UNAVAILABLE}
              @value-changed=${this._timeChanged}
              @click=${this._stopEventPropagation}
            ></ha-time-input>
          `
        : ``}
    `;
  }

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

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

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

  static styles = css`
    :host {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      --ha-input-padding-bottom: 0;
      flex-wrap: wrap;
    }
    ha-date-input {
      flex: 1 1 160px;
    }
    ha-date-input + ha-time-input {
      margin-left: var(--ha-space-1);
      margin-inline-start: var(--ha-space-1);
      margin-inline-end: initial;
    }
  `;
}

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