import { q, ElemJS, ejs } from "./basic.js";
import { store } from "./store/store.js";
import { Timeline } from "./Timeline.js";
import * as lsm from "./lsm.js";

function resolveMxc(url, size, method) {
  const [server, id] = url.match(/^mxc:\/\/([^/]+)\/(.*)/).slice(1);
  if (size && method) {
    return `${lsm.get(
      "domain"
    )}/_matrix/media/r0/thumbnail/${server}/${id}?width=${size}&height=${size}&method=${method}`;
  } else {
    return `${lsm.get("domain")}/_matrix/media/r0/download/${server}/${id}`;
  }
}

class ActiveGroupMarker extends ElemJS {
  constructor() {
    super(q("#c-group-marker"));
    store.activeGroup.subscribe("changeSelf", this.render.bind(this));
  }

  render() {
    if (store.activeGroup.exists()) {
      const group = store.activeGroup.value();
      this.style("opacity", 1);
      this.style("transform", `translateY(${group.element.offsetTop}px)`);
    } else {
      this.style("opacity", 0);
    }
  }
}

const activeGroupMarker = new ActiveGroupMarker();

class Group extends ElemJS {
  constructor(key, data) {
    super("div");

    this.data = data;
    this.order = this.data.order;

    this.class("c-group");
    this.child(
      this.data.icon
        ? ejs("img").class("c-group__icon").attribute("src", this.data.icon)
        : ejs("div").class("c-group__icon"),
      ejs("div").class("c-group__name").text(this.data.name)
    );

    this.on("click", this.onClick.bind(this));

    store.activeGroup.subscribe("changeSelf", this.render.bind(this));
  }

  render() {
    const active = store.activeGroup.value() === this;
    this.element.classList[active ? "add" : "remove"]("c-group--active");
  }

  onClick() {
    store.activeGroup.set(this);
  }
}

class Room extends ElemJS {
  constructor(id, data) {
    super("div");

    this.id = id;
    this.data = data;
    this.timeline = new Timeline();
    this.group = null;

    this.class("c-room");

    this.on("click", this.onClick.bind(this));
    store.activeRoom.subscribe("changeSelf", this.render.bind(this));

    this.render();
  }

  get order() {
    if (this.group) {
      let chars = 36;
      let total = 0;
      const name = this.getName();
      for (let i = 0; i < name.length; i++) {
        const c = name[i];
        let d = 0;
        if (c >= "A" && c <= "Z") d = c.charCodeAt(0) - 65 + 10;
        else if (c >= "a" && c <= "z") d = c.charCodeAt(0) - 97 + 10;
        else if (c >= "0" && c <= "9") d = +c;
        total += d * chars ** -i;
      }
      return total;
    } else {
      return -this.timeline.latest;
    }
  }

  getName() {
    let name = this.data.state.events.find((e) => e.type === "m.room.name");
    if (name) {
      name = name.content.name;
    } else {
      const users = this.data.summary["m.heroes"];
      const usernames = users.map((u) => (u.match(/^@([^:]+):/) || [])[1] || u);
      name = usernames.join(", ");
    }
    return name;
  }

  getIcon() {
    const avatar = this.data.state.events.find(
      (e) => e.type === "m.room.avatar"
    );
    if (avatar) {
      return resolveMxc(
        avatar.content.url || avatar.content.avatar_url,
        32,
        "crop"
      );
    } else {
      return null;
    }
  }

  isDirect() {
    return store.directs.has(this.id);
  }

  setGroup(id) {
    this.group = id;
  }

  getGroup() {
    if (this.group) {
      return store.groups.get(this.group).value();
    } else {
      return this.isDirect()
        ? store.groups.get("directs").value()
        : store.groups.get("channels").value();
    }
  }

  onClick() {
    store.activeRoom.set(this);
  }

  render() {
    this.clearChildren();
    // data
    const icon = this.getIcon();
    if (icon) {
      this.child(ejs("img").class("c-room__icon").attribute("src", icon));
    } else {
      this.child(ejs("div").class("c-room__icon", "c-room__icon--no-icon"));
    }
    this.child(ejs("div").class("c-room__name").text(this.getName()));
    // active
    const active = store.activeRoom.value() === this;
    this.element.classList[active ? "add" : "remove"]("c-room--active");
  }
}

class Rooms extends ElemJS {
  constructor() {
    super(q("#c-rooms"));

    this.roomData = [];
    this.rooms = [];

    store.rooms.subscribe("askAdd", this.askAdd.bind(this));
    store.rooms.subscribe("addItem", this.addItem.bind(this));
    // store.rooms.subscribe("changeItem", this.render.bind(this))
    store.activeGroup.subscribe("changeSelf", this.render.bind(this));
    store.directs.subscribe("changeItem", this.render.bind(this));
    store.newEvents.subscribe("changeSelf", this.sort.bind(this));

    this.render();
  }

  sort() {
    store.rooms.sort();
    this.render();
  }

  askAdd(event, { key, data }) {
    const room = new Room(key, data);
    store.rooms.addEnd(key, room);
  }

  addItem(event, key) {
    const room = store.rooms.get(key).value();
    if (room.getGroup() === store.activeGroup.value()) {
      this.child(room);
    }
  }

  render() {
    this.clearChildren();
    let first = null;
    // set room list
    store.rooms.forEach((id, room) => {
      if (room.value().getGroup() === store.activeGroup.value()) {
        if (!first) first = room.value();
        this.child(room.value());
      }
    });
    // if needed, change the active room to be an item in the room list
    if (
      !store.activeRoom.exists() ||
      store.activeRoom.value().getGroup() !== store.activeGroup.value()
    ) {
      if (first) {
        store.activeRoom.set(first);
      } else {
        store.activeRoom.delete();
      }
    }
  }
}
const rooms = new Rooms();

class Groups extends ElemJS {
  constructor() {
    super(q("#c-groups-list"));

    store.groups.subscribe("askAdd", this.askAdd.bind(this));
    store.groups.subscribe("changeItem", this.render.bind(this));
  }

  askAdd(event, { key, data }) {
    const group = new Group(key, data);
    store.groups.addEnd(key, group);
    store.groups.sort();
  }

  render() {
    this.clearChildren();
    store.groups.forEach((key, item) => {
      this.child(item.value());
    });
  }
}
const groups = new Groups();