import { consume } from "@lit/context";
import { mdiPlaylistPlus } from "@mdi/js";
import type { HassEntity } from "home-assistant-js-websocket";
import type { TemplateResult } from "lit";
import { LitElement, css, html, nothing } from "lit";
import { customElement, property, query, state } from "lit/decorators";
import { repeat } from "lit/directives/repeat";
import memoizeOne from "memoize-one";
import { fireEvent } from "../common/dom/fire_event";
import { stringCompare } from "../common/string/compare";
import { labelsContext } from "../data/context";
import type { LabelRegistryEntry } from "../data/label/label_registry";
import { updateLabelRegistryEntry } from "../data/label/label_registry";
import { showLabelDetailDialog } from "../panels/config/labels/show-dialog-label-detail";
import type { HomeAssistant, ValueChangedEvent } from "../types";
import "./chips/ha-chip-set";
import "./chips/ha-input-chip";
import type { HaDevicePickerDeviceFilterFunc } from "./device/ha-device-picker";
import { getLabelColorStyle } from "./ha-label";
import "./ha-label-picker";
import type { HaLabelPicker } from "./ha-label-picker";
import "./ha-tooltip";

@customElement("ha-labels-picker")
export class HaLabelsPicker extends LitElement {
  @property({ attribute: false }) public hass!: HomeAssistant;

  @property() public label?: string;

  @property({ attribute: false }) public value?: string[];

  @property() public helper?: string;

  @property() public placeholder?: string;

  @property({ type: Boolean, attribute: "no-add" })
  public noAdd = false;

  /**
   * Show only labels with entities from specific domains.
   * @type {Array}
   * @attr include-domains
   */
  @property({ type: Array, attribute: "include-domains" })
  public includeDomains?: string[];

  /**
   * Show no labels with entities of these domains.
   * @type {Array}
   * @attr exclude-domains
   */
  @property({ type: Array, attribute: "exclude-domains" })
  public excludeDomains?: string[];

  /**
   * Show only labels with entities of these device classes.
   * @type {Array}
   * @attr include-device-classes
   */
  @property({ type: Array, attribute: "include-device-classes" })
  public includeDeviceClasses?: string[];

  /**
   * List of labels to be excluded.
   * @type {Array}
   * @attr exclude-labels
   */
  @property({ type: Array, attribute: "exclude-label" })
  public excludeLabels?: string[];

  @property({ attribute: false })
  public deviceFilter?: HaDevicePickerDeviceFilterFunc;

  @property({ attribute: false })
  public entityFilter?: (entity: HassEntity) => boolean;

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

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

  @consume({ context: labelsContext, subscribe: true })
  @state()
  private _labels?: LabelRegistryEntry[];

  @query("ha-label-picker", true) public labelPicker!: HaLabelPicker;

  public async open() {
    await this.updateComplete;
    await this.labelPicker?.open();
  }

  public async focus() {
    await this.updateComplete;
    await this.labelPicker?.focus();
  }

  private _sortedLabels = memoizeOne(
    (
      value: string[] | undefined,
      labels: LabelRegistryEntry[] | undefined,
      language: string
    ) =>
      value
        ?.map((id) => labels?.find((label) => label.label_id === id))
        .filter((label): label is LabelRegistryEntry => label !== undefined)
        .sort((a, b) => stringCompare(a.name, b.name, language))
        .map((label) => ({
          ...label,
          style: getLabelColorStyle(label.color),
        }))
  );

  protected render(): TemplateResult {
    const labels = this._sortedLabels(
      this.value,
      this._labels,
      this.hass.locale.language
    );
    return html`
      ${this.label ? html`<label>${this.label}</label>` : nothing}
      <ha-label-picker
        .hass=${this.hass}
        .helper=${this.helper}
        .disabled=${this.disabled}
        .required=${this.required}
        .placeholder=${this.placeholder}
        .excludeLabels=${this.value}
        @value-changed=${this._labelChanged}
      >
        <ha-chip-set>
          ${labels?.length
            ? repeat(
                labels,
                (label) => label?.label_id,
                (label) => {
                  if (!label) return nothing;
                  const elementId = "label-" + label.label_id;
                  return html`
                    <ha-tooltip
                      .for=${elementId}
                      .disabled=${!label.description?.trim()}
                    >
                      ${label.description}
                    </ha-tooltip>
                    <ha-input-chip
                      .item=${label}
                      .id=${elementId}
                      @remove=${this._removeItem}
                      @click=${this._openDetail}
                      .disabled=${this.disabled}
                      .label=${label.name}
                      selected
                      style=${label.style}
                    >
                      ${label.icon
                        ? html`<ha-icon
                            slot="icon"
                            .icon=${label.icon}
                          ></ha-icon>`
                        : nothing}
                    </ha-input-chip>
                  `;
                }
              )
            : nothing}
          <ha-button
            id="picker"
            size="s"
            appearance="filled"
            @click=${this._openPicker}
            .disabled=${this.disabled}
          >
            <ha-svg-icon .path=${mdiPlaylistPlus} slot="start"></ha-svg-icon>
            ${this.hass.localize("ui.components.label-picker.add")}
          </ha-button>
        </ha-chip-set>
      </ha-label-picker>
    `;
  }

  private get _value() {
    return this.value || [];
  }

  private _removeItem(ev) {
    const label = ev.currentTarget.item;
    this._setValue(this._value.filter((id) => id !== label.label_id));
  }

  private _openDetail(ev) {
    const label = ev.currentTarget.item;
    showLabelDetailDialog(this, {
      entry: label,
      updateEntry: async (values) => {
        await updateLabelRegistryEntry(this.hass, label.label_id, values);
      },
    });
  }

  private _labelChanged(ev: ValueChangedEvent<string>) {
    ev.stopPropagation();
    const newValue = ev.detail.value;
    if (!newValue || this._value.includes(newValue)) {
      return;
    }
    this._setValue([...this._value, newValue]);
    this.labelPicker.value = "";
  }

  private _setValue(value?: string[]) {
    this.value = value;
    setTimeout(() => {
      fireEvent(this, "value-changed", { value });
      fireEvent(this, "change");
    }, 0);
  }

  private _openPicker(ev: Event) {
    ev.stopPropagation();
    this.labelPicker.open();
  }

  static styles = css`
    ha-chip-set {
      background-color: var(--mdc-text-field-fill-color);
      border-bottom: 1px solid var(--ha-color-border-neutral-normal);
      border-top-right-radius: var(--ha-border-radius-sm);
      border-top-left-radius: var(--ha-border-radius-sm);
      padding: var(--ha-space-3);
    }
    .placeholder {
      color: var(--mdc-text-field-label-ink-color);
      display: flex;
      align-items: center;
      height: var(--ha-space-8);
    }
    ha-input-chip {
      --md-input-chip-selected-container-color: var(
        --ha-label-background-color,
        var(--grey-color)
      );
      --md-input-chip-selected-outline-width: 1px;
    }
    label {
      display: block;
      margin: 0 0 8px;
    }
  `;
}

declare global {
  interface HTMLElementTagNameMap {
    "ha-labels-picker": HaLabelsPicker;
  }
}
