export class Actor {
  constructor(name, scene) {
    this.name = name;
    this.scene = scene;
    this.callbacks = new Map();
    this.status = this.scene.addDisplayValue(`${this.name} status`);
    this.status.set('New');
    this.scene.log(`participant ${this.name}`);
    this.values = new Map();
    this.active = 0;
    this.scene.registerActor(this);
  }

  activate() {
    this.active += 1;
    this.scene.log(`activate ${this.name}`);
  }

  deactivate() {
    if (!this.active) {
      throw new Error(`${this.name} is not active, can not deactivate`);
    }
    this.active -= 1;
    this.scene.log(`deactivate ${this.name}`);
  }

  send(dest, action, detail) {
    action.log(this, dest, detail ? JSON.stringify(detail) : '');
    dest.recv(this, action, detail);
    return this;
  }

  recv(src, action, detail) {
    const cb = this.callbacks.get(action.name);
    if (!cb) {
      throw new Error(
        `[${this.scene.name} actor ${this.name} does not have a callback registered for ${action.name}`,
      );
    }
    cb(src, detail);
    return this;
  }

  on(action, cb) {
    this.callbacks.set(action.name, cb);
    return this;
  }

  setStatus(status) {
    this.status.set(status);
    return this;
  }

  addValue(label) {
    this.values.set(label, this.scene.addDisplayValue(`${this.name} ${label}`));
    return this;
  }

  setValue(label, value) {
    let displayValue = this.values.get(label);
    if (!displayValue) {
      displayValue = this.scene.addDisplayValue(`${this.name} ${label}`);
      this.values.set(label, displayValue);
    }
    if (value !== displayValue.get()) {
      this.scene.log(`note over ${this.name} : ${label} = ${value}`);
    }
    displayValue.set(value);
    return this;
  }
}