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, patchContainsPreds } from "../web/patch";
import { getTopGraph } from "../web/RdfdbSyncedGraph";
import { SyncedGraph } from "../web/SyncedGraph";
import { GraphToControls } from "./GraphToControls";
export { EditChoice } from "../web/EditChoice";
export { Light9DeviceControl as Light9LiveDeviceControl } from "./Light9DeviceControl";
const log = debug("controls");

@customElement("light9-live-controls")
export class Light9LiveControls 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-live-device-control > div {
        break-inside: avoid-column;
      }
      light9-live-device-control {
      }
    `,
  ];

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

      <h1>device control</h1>

      <div id="save">
        <div>
          <button @click=${this.newEffect}>New effect</button>
          <edit-choice .uri=${this.effectChoice}></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=${this.effectChoice} .graphToControls=${this.graphToControls}></light9-device-control>
          `
        )}
      </div>
    `;
  }

  devices: Array<NamedNode> = [];
  // uri of the effect being edited, or null. This is the
  // master value; GraphToControls follows.
  @property() effectChoice: NamedNode | null = null;
  graphToControls!: GraphToControls;
  okToWriteUrl: boolean = false;

  constructor() {
    super();

    getTopGraph().then((g) => {
      this.graph = g;
      this.graph.runHandler(this.findDevices.bind(this), "findDevices");
      this.graphToControls = new GraphToControls(this.graph);
      // this.graph.runHandler(this.xupdate.bind(this), "Light9LiveControls update");
      this.setEffectFromUrl();
    });
  }

  updated(changedProperties: PropertyValues) {
    if (changedProperties.has("effectChoice")) {
      log(`effectChoice to ${this.effectChoice?.value}`);
      this.onEffectChoice();
    }
  }

  findDevices(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) => {
        log(`found dev ${dev.value}`)
        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) {
      log(`found effect in url ${effect}`);
      this.effectChoice = this.graph.Uri(effect);
    }
    this.okToWriteUrl = true;
  }

  writeToUrl(effect: NamedNode | null) {
    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.effectChoice = this.graphToControls.newEffect();
  }

  onEffectChoice() {
    const U = (x: any) => this.graph.Uri(x);
    if (this.effectChoice == null) {
      // unlink
      log("onEffectChoice unlink");
      if (this.graphToControls != null) {
        this.graphToControls.setEffect(null);
      }
    } else {
      if (this.graphToControls != null) {
        this.graphToControls.setEffect(this.effectChoice);
      } else {
        throw new Error("graphToControls not set");
      }
    }
    this.writeToUrl(this.effectChoice);
  }

  clearAll() {
    // clears the effect!
    return this.graphToControls.emptyEffect();
  }

  configureFromGraph() {
    const U = (x: string) => this.graph.Uri(x);

    const newDevs: NamedNode[] = [];
    for (let dc of Array.from(this.graph.sortedUris(this.graph.subjects(U("rdf:type"), U(":DeviceClass"))))) {
      for (let dev of Array.from(this.graph.sortedUris(this.graph.subjects(U("rdf:type"), dc)))) {
        if (this.graph.contains(dev, U(":hideInLiveUi"), null)) {
          continue;
        }
        if (newDevs.length == 0) newDevs.push(dev);
      }
    }
    log("is this called?");
    log(`controls update now has ${newDevs.length} devices`);
    this.devices = newDevs;
    this.requestUpdate();

    return;

    // Tried css columns- big slowdown from relayout as I'm scrolling.
    // Tried isotope- seems to only scroll to the right.
    // Tried columnize- fails in jquery maybe from weird elements.

    // not sure how to get this run after the children are created
    return setTimeout(
      () =>
        $("#deviceControls").isotope({
          // fitColumns would be nice, but it doesn't scroll vertically
          layoutMode: "masonry",
          containerStyle: null,
        }),
      2000
    );
  }
}