import debug from "debug";
import { css, html, LitElement, PropertyValues } from "lit";
import { customElement, property } from "lit/decorators.js";
import { NamedNode } from "n3";
import { sortBy, uniq } from "underscore";
import { Patch } from "../patch";
import { getTopGraph } from "../RdfdbSyncedGraph";
import { SyncedGraph } from "../SyncedGraph";
import { Effect, newEffect } from "./Effect";
export { EditChoice } from "../EditChoice";
export { Light9DeviceControl as Light9LiveDeviceControl } from "./Light9DeviceControl";
const log = debug("settings");

@customElement("light9-device-settings")
export class Light9DeviceSettings extends LitElement {
  graph!: SyncedGraph;

  static styles = [
    css`
      :host {
        display: flex;
        flex-direction: column;
      }
      #preview {
        width: 100%;
      }
      #deviceControls {
        flex-grow: 1;
        position: relative;
        width: 100%;
        overflow-y: auto;
      }

      light9-device-control > div {
        break-inside: avoid-column;
      }
      light9-device-control {
        vertical-align: top;
      }
    `,
  ];

  render() {
    return html`
      <rdfdb-synced-graph></rdfdb-synced-graph>

      <h1>effect DeviceSettings</h1>

      <div id="save">
        <div>
          <button @click=${this.newEffect}>New effect</button>
          <edit-choice .uri=${this.currentEffect ? this.currentEffect.uri : null} @edited=${this.onEffectChoice2} rename></edit-choice>
          <button @click=${this.clearAll}>clear settings in this effect</button>
        </div>
      </div>

      <div id="deviceControls">
        ${this.devices.map(
          (device: NamedNode) => html`
            <light9-device-control .uri=${device} .effect=${this.currentEffect}> .graphToControls={this.graphToControls} </light9-device-control>
          `
        )}
      </div>
    `;
  }

  devices: Array<NamedNode> = [];
  @property() currentEffect: Effect | null = null;
  okToWriteUrl: boolean = false;

  constructor() {
    super();

    getTopGraph().then((g) => {
      this.graph = g;
      this.graph.runHandler(this.compile.bind(this), "findDevices");
      this.setEffectFromUrl();
    });
  }

  onEffectChoice2(ev: CustomEvent) {
    const uri = ev.detail.newValue as NamedNode;
    this.setCurrentEffect(uri);
  }
  setCurrentEffect(uri: NamedNode) {
    if (uri === null) {
      this.currentEffect = null;
      // todo: wipe the UI settings
    } else {
      this.currentEffect = new Effect(this.graph, uri);
    }
  }

  updated(changedProperties: PropertyValues<this>) {
    log("ctls udpated", changedProperties);
    if (changedProperties.has("currentEffect")) {
      log(`effectChoice to ${this.currentEffect?.uri?.value}`);
      this.writeToUrl(this.currentEffect?.uri);
    }
    // this.graphToControls?.debugDump();
  }

  // Note that this doesn't fetch setting values, so it only should get rerun
  // upon (rarer) changes to the devices etc. todo: make that be true
  private compile(patch?: Patch) {
    const U = this.graph.U();
    // if (patch && !patchContainsPreds(patch, [U("rdf:type")])) {
    //   return;
    // }

    this.devices = [];
    let classes = this.graph.subjects(U("rdf:type"), U(":DeviceClass"));
    log(`found ${classes.length} device classes`);
    uniq(sortBy(classes, "value"), true).forEach((dc) => {
      sortBy(this.graph.subjects(U("rdf:type"), dc), "value").forEach((dev) => {
        this.devices.push(dev as NamedNode);
      });
    });
    this.requestUpdate();
  }

  setEffectFromUrl() {
    // not a continuous bidi link between url and effect; it only reads
    // the url when the page loads.
    const effect = new URL(window.location.href).searchParams.get("effect");
    if (effect != null) {
      this.currentEffect = new Effect(this.graph, this.graph.Uri(effect));
    }
    this.okToWriteUrl = true;
  }

  writeToUrl(effect: NamedNode | undefined) {
    const effectStr = effect ? this.graph.shorten(effect) : "";
    if (!this.okToWriteUrl) {
      return;
    }
    const u = new URL(window.location.href);
    if ((u.searchParams.get("effect") || "") === effectStr) {
      return;
    }
    u.searchParams.set("effect", effectStr); // this escapes : and / and i wish it didn't
    window.history.replaceState({}, "", u.href);
    log("wrote new url", u.href);
  }

  newEffect() {
    this.setCurrentEffect(newEffect(this.graph));
  }

  clearAll() {
    this.currentEffect?.clearAllSettings()
  }
}