import type {
  API,
  DynamicPlatformPlugin,
  PlatformConfig,
  Logger,
  PlatformAccessory,
} from 'homebridge';
import {APIEvent} from 'homebridge';
import {HDMIConfig, HDMIPlatformConfig} from './HDMIConfig';
import {HDMISwitchPlatformAccessory} from './HDMISwitchPlatformAccessory';
import {PLATFORM_NAME, PLUGIN_NAME} from './settings';

export class HDMISwitchPlatform implements DynamicPlatformPlugin {
  public readonly accessories: PlatformAccessory[] = [];

  constructor(
    public readonly log: Logger,
    public readonly config: PlatformConfig,
    public readonly api: API
  ) {
    this.api.on(APIEvent.DID_FINISH_LAUNCHING, () => {
      this.log.debug('Load HDMI switch accessories');

      this.discoverDevices();
    });
  }

  configureAccessory(accessory: PlatformAccessory): void {
    // console.log('configureAccessory', accessory.displayName, accessory.UUID);
    this.accessories.push(accessory);
  }

  discoverDevices(): void {
    const c: HDMIPlatformConfig = this.config as HDMIPlatformConfig;
    const devices = c.devices;

    // console.log('all accessories: ', this.accessories);
    // this.accessories.forEach((value: PlatformAccessory) => {
    //     console.log(value.displayName, value.UUID);
    // });

    const retiredAccessories = this.accessories.slice();

    devices.forEach((device: HDMIConfig) => {
      const name: string = device.name;
      const path: string = device.path;
      const id: string = device.id || `hdmi-switch:${path}`;
      const uuid = this.api.hap.uuid.generate(id);

      // see if an accessory with the same uuid has already been registered and restored from
      // the cached devices we stored in the `configureAccessory` method above
      const existingAccessory = this.accessories.find(
        accessory => accessory.UUID === uuid
      );
      if (existingAccessory) {
        this.log.info(
          'Restoring existing accessory from cache:',
          existingAccessory.displayName,
          uuid
        );

        // link accessory
        new HDMISwitchPlatformAccessory(
          this.log,
          this.api,
          device,
          this,
          existingAccessory
        );
        this.api.updatePlatformAccessories([existingAccessory]);

        // remove from retired devices
        const retiredIndex = retiredAccessories.indexOf(existingAccessory);
        if (retiredIndex > -1) {
          retiredAccessories.splice(retiredIndex, 1);
        }
      } else {
        const accessory = new this.api.platformAccessory(name, uuid);
        accessory.context.device = device;

        new HDMISwitchPlatformAccessory(
          this.log,
          this.api,
          device,
          this,
          accessory
        );
        this.api.publishExternalAccessories(PLUGIN_NAME, [accessory]);
      }
    });

    // clean up unused accessories
    this.log.info('removing retired accessories:', retiredAccessories);
    this.api.unregisterPlatformAccessories(
      PLUGIN_NAME,
      PLATFORM_NAME,
      retiredAccessories
    );
  }
}