import type { CSSResultGroup } from "lit";
import { html, LitElement, nothing } from "lit";
import { customElement, property, state } from "lit/decorators";
import memoizeOne from "memoize-one";
import {
  assert,
  assign,
  literal,
  number,
  object,
  optional,
  string,
  union,
} from "superstruct";
import { fireEvent } from "../../../../common/dom/fire_event";
import type { LocalizeFunc } from "../../../../common/translations/localize";
import "../../../../components/ha-form/ha-form";
import type { SchemaUnion } from "../../../../components/ha-form/types";
import type { HomeAssistant } from "../../../../types";
import { DEFAULT_HOURS_TO_SHOW } from "../../cards/hui-sensor-card";
import type { SensorCardConfig } from "../../cards/types";
import type { LovelaceCardEditor } from "../../types";
import { baseLovelaceCardConfig } from "../structs/base-card-struct";
import { entityNameStruct } from "../structs/entity-name-struct";
import { configElementStyle } from "./config-elements-style";

const cardConfigStruct = assign(
  baseLovelaceCardConfig,
  object({
    entity: optional(string()),
    name: optional(entityNameStruct),
    icon: optional(string()),
    graph: optional(union([literal("line"), literal("none")])),
    unit: optional(string()),
    detail: optional(number()),
    theme: optional(string()),
    hours_to_show: optional(number()),
    limits: optional(
      object({
        min: optional(number()),
        max: optional(number()),
      })
    ),
  })
);

@customElement("hui-sensor-card-editor")
export class HuiSensorCardEditor
  extends LitElement
  implements LovelaceCardEditor
{
  @property({ attribute: false }) public hass?: HomeAssistant;

  @state() private _config?: SensorCardConfig;

  public setConfig(config: SensorCardConfig): void {
    assert(config, cardConfigStruct);
    this._config = config;
  }

  private _schema = memoizeOne(
    (localize: LocalizeFunc) =>
      [
        {
          name: "entity",
          selector: {
            entity: { domain: ["counter", "input_number", "number", "sensor"] },
          },
        },
        {
          name: "name",
          selector: {
            entity_name: {},
          },
          context: { entity: "entity" },
        },
        {
          type: "grid",
          name: "",
          schema: [
            {
              name: "icon",
              selector: {
                icon: {},
              },
              context: {
                icon_entity: "entity",
              },
            },
            {
              name: "graph",
              selector: {
                select: {
                  options: ["none", "line"].map((value) => ({
                    value,
                    label: localize(
                      `ui.panel.lovelace.editor.card.sensor.graph_options.${value}`
                    ),
                  })),
                },
              },
            },
            { name: "unit", selector: { text: {} } },
            { name: "detail", selector: { boolean: {} } },
            { name: "theme", selector: { theme: {} } },
            {
              name: "hours_to_show",
              default: DEFAULT_HOURS_TO_SHOW,
              selector: { number: { min: 1, mode: "box" } },
            },
          ],
        },
        {
          type: "grid",
          name: "limits",
          schema: [
            {
              name: "min",
              selector: { number: { mode: "box" } },
            },
            {
              name: "max",
              selector: { number: { mode: "box" } },
            },
          ],
        },
      ] as const
  );

  protected render() {
    if (!this.hass || !this._config) {
      return nothing;
    }

    const data = {
      graph: "none",
      ...this._config,
      detail: this._config!.detail === 2,
    };

    return html`
      <ha-form
        .hass=${this.hass}
        .data=${data}
        .schema=${this._schema(this.hass.localize)}
        .computeLabel=${this._computeLabelCallback}
        @value-changed=${this._valueChanged}
      ></ha-form>
    `;
  }

  private _valueChanged(ev: CustomEvent): void {
    const config = ev.detail.value;
    config.detail = config.detail ? 2 : 1;
    fireEvent(this, "config-changed", { config });
  }

  private _computeLabelCallback = (
    schema: SchemaUnion<ReturnType<typeof this._schema>>
  ) => {
    switch (schema.name) {
      case "theme":
        return `${this.hass!.localize(
          "ui.panel.lovelace.editor.card.generic.theme"
        )} (${this.hass!.localize(
          "ui.panel.lovelace.editor.card.config.optional"
        )})`;
      case "detail":
        return this.hass!.localize(
          "ui.panel.lovelace.editor.card.sensor.show_more_detail"
        );
      case "graph":
        return this.hass!.localize(
          "ui.panel.lovelace.editor.card.sensor.graph_type"
        );
      case "min":
        return this.hass!.localize(
          "ui.panel.lovelace.editor.card.sensor.limit_min"
        );
      case "max":
        return this.hass!.localize(
          "ui.panel.lovelace.editor.card.sensor.limit_max"
        );
      default:
        return this.hass!.localize(
          `ui.panel.lovelace.editor.card.generic.${schema.name}`
        );
    }
  };

  static get styles(): CSSResultGroup {
    return configElementStyle;
  }
}

declare global {
  interface HTMLElementTagNameMap {
    "hui-sensor-card-editor": HuiSensorCardEditor;
  }
}
