const EventEmitter = require("events");

let linkSignal = null;

module.exports = class {
  onCreate(input) {
    this.state = {
      shortName: "",
      name: "",
      text: "",
      nameSuffix: "",
      modal: null,
      removed: false,
      multipart: false,
      anchored: false,
      prevWasText: false,
      dark: false,
    }

    this.mounted = false;

    this.updatePost(input)
  }

  open(modal) {
    this.state.modal = modal
  }

  close() {
    this.state.modal = null
  }

  move(toPosition) {
    this.emit("move", toPosition)
  }

  remove() {
    this.state.removed = true
    this.emit("remove")
  }

  edited(data) {
    this.emit("edited", data)
  }

  onInput(input) {
    if (this.state == null) {
      return
    }

    const timediff = Date.parse(input.post.time) - Date.parse(input.prev.time)
    this.state.multipart = (!input.post.kind.startsWith("annotation.") && input.post.nick == input.prev.nick && input.prev.multipart !== false) && (Math.abs(timediff) < 60000);
    this.state.prevWasText = (input.prev.kind === "text");

    this.updatePost(input)
  }

  onMount() {
    this.linkSignalCallback = () => {
      this.state.anchored = false
    }
    if (linkSignal == null) {
      linkSignal = new EventEmitter()
      linkSignal.setMaxListeners(10000)
    }
    linkSignal.on("signal", this.linkSignalCallback)

    this.state.anchored = window.location.hash.slice(1) === this.input.post.id;
  }

  onUnmount() {
    linkSignal.removeListener("signal", this.linkSignalCallback)
  }

  link() {
    linkSignal.emit("signal")
    this.state.anchored = true
  }

  updatePost(input) {
    this.state.shortName = input.post.nick.split("_").shift()
    this.state.name = input.post.nick
    this.state.nameSuffix = ""

    this.state.text = input.post.text

    if (input.highlights.length > 0 && (input.post.kind === "action" || input.post.kind === "text")) {
      this.state.dark = true
    } else {
      this.state.dark = false
    }

    if (!input.post.nick.startsWith("=")) {
      const postNick = input.post.nick.replace("'s", "").replace("s'", "s")
      for (const character of input.characters) {
        for (const nick of character.nicks) {
          if (nick === postNick) {
            this.state.name = character.name + character.id
            this.state.shortName = character.shortName

            if (input.post.nick.endsWith("'s") || input.post.nick.endsWith("'")) {
              this.state.nameSuffix = (character.shortName.endsWith("s") || character.shortName.endsWith("z")) ? "'" : "'s"
            }

            if (input.highlights.length > 0) {
              this.state.dark = !(input.highlights.includes(character.id))
            } else {
              this.state.dark = false
            }

            return
          }
        }
      }
    }
  }

  kindClass(prefix) {
    if (this.input.post == null) {
      return
    }

    return `${prefix}${this.input.post.kind.replace(".", "-")}`
  }
}