import { _decorator, AssetManager, AudioClip, AudioSource, Component, instantiate, Prefab } from 'cc'
import { Logger } from '../utils/Logger'
import PrefabLoader from '../utils/PrefabLoader'
import LocalStorage from '../utils/LocalStorage'
import MusicConfig from '../config/MusicConfig'
import { GameConfig } from '../../game/config/GameConfig'

const { ccclass, property } = _decorator

/**
 * 背景音乐
 */

@ccclass('MusicPrefab')
export default class MusicPrefab extends Component {
	private static instance: MusicPrefab
	private static MUSIC_VOLUMN_KEY: string = 'musicVolumn'
	public static musicVolumn: number = 1
	public static play(key: string) {
		let url: string = MusicConfig.musicKey2Path.get(key)
		if (url) {
			AssetManager.instance.resources.load(
				url,
				AudioClip,
				(error: Error, clip: AudioClip) => {
					if (error) {
						Logger.warn(this, 'load music error===', error.message)
					} else {
						if (clip) {
							this.instance.node.getComponent(AudioSource).clip = clip
							this.instance.node.getComponent(AudioSource).volume =
								this.musicVolumn
							this.instance.node.getComponent(AudioSource).play()
							this.instance.node.getComponent(AudioSource).loop = true
						}
					}
				}
			)
		} else {
			Logger.warn(this, '播放不存在的music=', key)
		}
	}

	public static changeVolumn(nowVolumn: number) {
		this.musicVolumn = nowVolumn
		this.instance.node.getComponent(AudioSource).volume = nowVolumn
		LocalStorage.setItem(
			MusicPrefab.MUSIC_VOLUMN_KEY,
			this.musicVolumn.toString()
		)
	}

	private static preInit() {
		this.musicVolumn = parseFloat(
			LocalStorage.getItem(MusicPrefab.MUSIC_VOLUMN_KEY)
		)
		if (isNaN(this.musicVolumn)) {
			this.musicVolumn = 1
		}
	}

	public static preLoad(): Promise<void> {
		return new Promise((resolve, reject) => {
			PrefabLoader.loadPrefab(
				GameConfig.GameName + '/' + 'share/uicomponent/MusicPrefab',
				(loadedResource: Prefab) => {
					MusicPrefab.instance =
						instantiate(loadedResource).getComponent(MusicPrefab)
					this.preInit()
					resolve()
				}
			)
		})
	}

	public static destory() {
		if (MusicPrefab.instance) {
			MusicPrefab.instance.getComponent(AudioSource).stop()
			MusicPrefab.instance.destroy()
		}
		MusicPrefab.instance = null
	}
}