<template>
	<!-- #ifdef APP -->
	<scroll-view style="flex: 1;">
	<!-- #endif -->
		<view class="uni-padding-wrap">
			<page-head title="audio"></page-head>
			<view class="uni-common-mt">
				<slider ref="slider" :value="position" :min="0" :max="duration" @changing="onchanging"
					@change="onchange"></slider>
			</view>
			<view class="uni-title">
				<text class="uni-title-text">属性示例</text>
			</View>
			<text class="uni-text-box uni-common-mt">当前音频播放位置（保留小数点后 3 位）：{{currentTime}} s</text>
			<text class="uni-text-box">音频的长度（单位:s）：{{duration}} s</text>
			<text class="uni-text-box">当前是否停止状态：{{isPaused}}</text>
			<text class="uni-text-box">音频缓冲的时间点：{{buffered}} s</text>
			<text class="uni-text-box">当前音量：{{volume}}</text>
			<button plain :disabled="volume == 1" @click="increaseVolume">增加音量</button>
			<button plain :disabled="volume == 0" @click="decreaseVolume">减少音量</button>

			<text class="uni-subtitle-text uni-title">开始播放的位置（单位：s）</text>
			<input :value="startTime" type="number" placeholder="开始播放的位置（单位：s）" class="uni-input"
				@input="startTimeInput"></input>
			<boolean-data :defaultValue="false" title="是否自动开始播放" @change="setAutoplay"></boolean-data>
			<boolean-data :defaultValue="false" title="是否循环播放" @change="setLoop"></boolean-data>
			<text class="uni-subtitle-text uni-title"
				style="padding-left: 10px;padding-top: 10px;padding-right: 10px;">播放倍率(Web/HarmonyOS 不支持)</text>
			<radio-group class="uni-flex uni-row radio-group" @change="playbackRateChange"
				style="flex-wrap: wrap;padding: 10px;">
				<radio value="0.5" style="margin-right: 3px">0.5
				</radio>
				<radio value="0.8" style="margin-right: 3px">0.8</radio>
				<radio value="1.0" style="margin-right: 3px" :checked="playbackRateChecked">1.0</radio>
				<radio value="1.25" style="margin-right: 3px">1.25</radio>
				<radio value="1.5" style="margin-right: 3px">1.5</radio>
				<radio value="2.0">2.0</radio>
			</radio-group>

			<view class="uni-title">
				<text class="uni-title-text">方法示例</text>
			</View>
			<button :disabled="isPlaying" @click="play" class="uni-btn">播放</button>
			<button :disabled="!isPlaying" @click="pause" class="uni-btn">暂停</button>
			<button :disabled="!isPlaying" @click="stop" class="uni-btn">停止</button>
			<button @click="onchangeValue(20)" class="uni-btn">跳转到指定位置20</button>
			<button @click="onTimeUpdate" class="uni-btn">onTimeUpdate</button>
			<button @click="offTimeUpdate" class="uni-btn">offTimeUpdate</button>
			<button @click="onWaiting" class="uni-btn">onWaiting</button>
			<button @click="offWaiting" class="uni-btn">offWaiting</button>


			<text style="color: red;font-size: 15px;margin-top: 10px;">tip:销毁后请重新进入此界面再播放</text>
			<button @click="destory" class="uni-btn">销毁</button>

			<view class="uni-title">
				<text class="uni-title-text">格式/路径示例</text>
			</View>
			<navigator url="/pages/API/create-inner-audio-context/inner-audio-format" class="uni-btn">
				<button @click="pause">音频格式示例</button>
			</navigator>
			<navigator url="/pages/API/create-inner-audio-context/inner-audio-path" class="uni-btn">
				<button @click="pause">音频路径示例</button>
			</navigator>
			<navigator url="/pages/API/create-inner-audio-context/inner-audio-mult" class="uni-btn">
				<button @click="pause">多音频同时播放</button>
			</navigator>
		</view>
	<!-- #ifdef APP -->
	</scroll-view>
	<!-- #endif -->
</template>
<script lang="uts">
	const audioUrl = 'https://web-ext-storage.dcloud.net.cn/uni-app/ForElise.mp3'
	export default {
		data() {
			return {
				title: "innerAudioContext",
				currentTime: 0,
				duration: 100,
				startTime: 0,
				buffered: 0,
				volume: 0.5,
				isCanplay: false,
				isPlaying: false,
				isPaused: true,
				isPlayEnd: false,
				_isChanging: false,
				_audioContext: null as InnerAudioContext | null,
				// 自动化测试
				onSeekingTest: false,
				onSeekedTest: false,
				onWaitingTest: false,
				playbackRateChecked: true,
				onTimeUpdateCb: (res : any) => { },
				onWaitingCb: (res : any) => { }
			}
		},
		computed: {
			position() {
				return this.isPlayEnd ? 0 : this.currentTime;
			},
		},
		onReady() {
			this._audioContext = uni.createInnerAudioContext();
			this._audioContext!.src = audioUrl;
			this.volume = this._audioContext!.volume;
			this.onCanplay()
			this._audioContext!.onPlay(() => {
				this.isPaused = false;
				this.isPlaying = true;
				console.log('开始播放', this.isPaused);
			});

			this.onTimeUpdateCb = (res : any) => {
				if (this._isChanging) { return; }
				this.currentTime = this._audioContext!.currentTime;
				this.buffered = this._audioContext!.buffered;
				console.log('onTimeUpdateCb', this.currentTime)

				// #ifdef MP
				// 微信小程序安卓端过早的时机获取的buffered、duration为0，改为在此处获取
				if(this._audioContext!.duration === 0) {
					this.buffered = this._audioContext!.buffered;
					this.duration = this._audioContext!.duration
				}
				// #endif
				if (this.currentTime > this.buffered) {
					console.log('缓冲不足');
				}
			};

			this.onWaitingCb = (res : any) => {
				console.log('音频加载中事件');
				this.onWaitingTest = true
			}

			this.onTimeUpdate()
			// this.onWaiting()
			this.onError()
			this.onEnded()
		},
		onUnload() {
			if (this._audioContext != null) {
				if (this.isPlaying) {
					this.stop();
				}
				this._audioContext!.destroy()
			}
		},
		methods: {
			onCanplay() {
				this._audioContext!.onCanplay(() => {
					console.log('音频进入可以播放状态事件');
					this.isCanplay = true;
					// #ifdef MP
					// 微信小程序安卓端过早的时机获取的volume为undefine，改为在此处获取
					this.volume = this._audioContext!.volume;
					// #endif
					// 当音频可以播放时，获取缓冲信息
					this.buffered = this._audioContext!.buffered;
					this.duration = this._audioContext!.duration
				});
			},
			onchanging() {
				this._isChanging = true;
			},
			onchange(e : UniSliderChangeEvent) {
				let pos = e.detail.value;
				console.log('pos', pos);
				this.onSeeking()
				this.onSeeked()
				this._audioContext!.seek(pos);
				this._isChanging = false;
			},
			onchangeValue(pos : number) {
				this.onSeeking()
				this.onSeeked()
				this._audioContext!.seek(pos);
				this._isChanging = false;
			},
			startTimeInput(e : UniInputEvent) {
				let startTimeValue = parseInt(e.detail.value)
				this._audioContext!.startTime = startTimeValue;
				this.onchangeValue(startTimeValue)
			},
			setAutoplay() {
				this._audioContext!.autoplay = !this._audioContext!.autoplay;
				console.log(this._audioContext!.autoplay, 'autoplay');
			},
			setLoop() {
				this._audioContext!.loop = !this._audioContext!.loop;
				console.log(this._audioContext!.loop, 'loop');
			},
			play() {
				if (!this.isCanplay) {
					uni.showToast({
						title: '音频未进入可以播放状态，请稍后再试',
						icon: 'error'
					});
					return;
				}
				this.isPlaying = true;
				this._audioContext!.play();
				this.isPlayEnd = false;
				if (this._audioContext!.startTime > 0) {
					this.onchangeValue(this._audioContext!.startTime)
				}
			},
			onSeeking() {
				this._audioContext!.onSeeking(() => {
					console.log('音频进行 seek 操作事件');
					this.onSeekingTest = true
				});
			},
			onSeeked() {
				this._audioContext!.onSeeked(() => {
					console.log('音频完成 seek 操作事件');
					this.onSeekedTest = true
				});
			},
			onWaiting() {
				this._audioContext!.onWaiting(this.onWaitingCb);
			},
			offWaiting() {
				this._audioContext!.offWaiting(this.onWaitingCb);
			},
			onTimeUpdate() {
				this._audioContext!.onTimeUpdate(this.onTimeUpdateCb);
			},
			offTimeUpdate() {
				this._audioContext!.offTimeUpdate(this.onTimeUpdateCb);
			},
			increaseVolume() {
				this.volume = Math.min(this.volume + 0.1, 1);
				this.volume = parseFloat(this.volume.toFixed(1));
				this._audioContext!.volume = this.volume
				console.log('增加音量', this.volume);
			},
			decreaseVolume() {
				this.volume = Math.max(this.volume - 0.1, 0);
				this.volume = parseFloat(this.volume.toFixed(1));
				console.log('减少音量', this.volume);
				this._audioContext!.volume = this.volume
			},
			onEnded() {
				this._audioContext!.onEnded(() => {
					console.log('播放结束');
					this.currentTime = 0;
					this.startTime = 0
					this.isPlaying = false;
					this.isPaused = true;
					this.isPlayEnd = true;
					(this.$refs["slider"] as UniSliderElement).value = 0
				});
			},
			onError() {
				this._audioContext!.onError((err) => {
					console.log('err', err);
					this.isPlaying = false;
					this.isPaused = true;
				});
			},
			pause() {
				this._audioContext!.onPause(() => {
					console.log('音频暂停事件');
					this.isPaused = true;
				});
				this._audioContext!.pause();
				this.isPlaying = false;
			},
			stop() {
				console.log('stop');
				this._audioContext!.onStop(() => {
					// 第一次点停止时，不触发
					this.isPaused = true;
					console.log('音频停止事件');
				});
				this._audioContext!.stop();
				this.isPlaying = false;
				console.log('stop', this.isPaused);
			},
			destory() {
				if (this._audioContext != null) {
					this.isPlaying = false;
					this._audioContext!.destroy()
				}
			},
			playbackRateChange(e : UniRadioGroupChangeEvent) {
				// if (this._audioContext != null && this.isPlaying) {
					console.log(parseFloat(e.detail.value))
					this._audioContext!.playbackRate = parseFloat(e.detail.value)
				// }
			},
      //just for test
      setSrc(src:string){
        if(	this._audioContext!=null){
          this._audioContext!.src = src
        }
      }
		}
	}
</script>
<style>
	.play-time-area {
		display: flex;
		flex-direction: row;
		margin-top: 20px;
	}

	.duration {
		margin-left: auto;
	}

	.play-button-area {
		display: flex;
		flex-direction: row;
		justify-content: center;
		margin: 50px 0;
	}

	.icon-play {
		width: 60px;
		height: 60px;
	}
</style>
