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<template>
	<view class="fui-single__input-wrap" :style="{marginTop:marginTop+'rpx',marginBottom:marginBottom+'rpx'}"
		@tap="onAliClick">
		<view class="fui-single__input" :style="{paddingLeft:padding+'rpx',paddingRight:padding+'rpx'}"
			:class="{'fui-sinput__disabled':disabled}">
			<view class="fui-sinput__item"
				:class="{'fui-sinput__border-color':!borderColor && activeIndex!==index && !inputVal[index],'fui-sinput__active-color':!activeColor && (activeIndex===index || inputVal[index])}"
				:style="{width:width+'rpx',height:height+'rpx',background:background,borderRadius:radius+'rpx',borderColor:activeIndex===index || inputVal[index]?activeColor:borderColor,borderTopWidth:(border==1?borderWidth:0)+'rpx',borderLeftWidth:(border==1?borderWidth:0)+'rpx',borderRightWidth:(border==1?borderWidth:0)+'rpx',borderBottomWidth:(border==1 || border==2?borderWidth:0)+'rpx'}"
				@tap="onTap" v-for="(item,index) in inputArr" :key="index">
				<text class="fui-sinput__text" :class="{'fui-sinput__color':!color}"
					:style="{width:width+'rpx',height:height+'rpx',fontSize:size+'rpx',lineHeight:height+'rpx',color:color,fontWeight:fontWeight}">{{password?(inputVal[index] ? '●':''):(inputVal[index] || '')}}</text>
				<text class="fui-sinput__placeholder"
					:style="{fontSize:size+'rpx',fontWeight:fontWeight}">{{password?(inputVal[index] ? '●':''):(inputVal[index] || '')}}</text>
				<view class="fui-sinput__cursor"
					:class="{'fui-sinput__cursor-color':!cursorColor,'fui-sinput__cursor-ani':activeIndex===index && focus}"
					:ref="item" v-if="cursor && !disabled" :style="{height:cursorHeight+'rpx',background:cursorColor}">
				</view>
			</view>
		</view>
		<input :value="val" :password="password" :type="type" class="fui-sinput__hidden"
			:class="{'fui-sinput__alizero':aliZero}" @input="onInput" @blur="onBlur" :focus="focus" :maxlength="length"
			v-if="native" :disabled="disabled" @confirm="onConfirm" @focus="onTap" />
	</view>
</template>

<script>
	// #ifdef APP-NVUE
	const animation = uni.requireNativePlugin('animation');
	// #endif
	export default {
		name: "fui-single-input",
		emits: ['complete', 'focus', 'input', 'blur', 'confirm'],
		props: {
			//组件外层左右padding值
			padding: {
				type: [Number, String],
				default: 88
			},
			marginTop: {
				type: [Number, String],
				default: 0
			},
			marginBottom: {
				type: [Number, String],
				default: 0
			},
			//native为false时，自定义键盘时输入的值；native为true时初始值。不可超过length长度
			value: {
				type: String,
				default: ''
			},
			//native为true时有效，H5不支持动态切换type类型
			type: {
				type: String,
				default: 'text'
			},
			password: {
				type: Boolean,
				default: false
			},
			disabled: {
				type: Boolean,
				default: false
			},
			//获取焦点
			isFocus: {
				type: Boolean,
				default: false
			},
			//是否弹起原生键盘，设为false，则结合自定义键盘使用
			native: {
				type: Boolean,
				default: true
			},
			cursor: {
				type: Boolean,
				default: true
			},
			cursorColor: {
				type: String,
				// #ifdef APP-NVUE
				default: '#465CFF'
				// #endif
				// #ifndef APP-NVUE
				default: ''
				// #endif
			},
			cursorHeight: {
				type: [Number, String],
				default: 60
			},
			//内容长度/输入框个数，一般4~6个字符，请控制在6个或以下
			length: {
				type: Number,
				default: 4
			},
			width: {
				type: [Number, String],
				default: 112
			},
			height: {
				type: [Number, String],
				default: 112
			},
			background: {
				type: String,
				default: 'transparent'
			},
			//1-显示所有边框 2-只显示底部边框，3-无边框
			border: {
				type: [Number, String],
				default: 2
			},
			borderColor: {
				type: String,
				// #ifdef APP-NVUE
				default: '#eee'
				// #endif
				// #ifndef APP-NVUE
				default: ''
				// #endif
			},
			activeColor: {
				type: String,
				// #ifdef APP-NVUE
				default: '#465CFF'
				// #endif
				// #ifndef APP-NVUE
				default: ''
				// #endif
			},
			borderWidth: {
				type: [Number, String],
				default: 4
			},
			radius: {
				type: [Number, String],
				default: 0
			},
			size: {
				type: [Number, String],
				default: 48
			},
			color: {
				type: String,
				// #ifdef APP-NVUE
				default: '#181818'
				// #endif
				// #ifndef APP-NVUE
				default: ''
				// #endif
			},
			fontWeight: {
				type: [Number, String],
				default: 600
			}
		},
		data() {
			return {
				inputArr: [],
				inputVal: [],
				focus: false,
				// #ifdef APP-NVUE
				opacity: 0,
				stop: false,
				ref: '',
				// #endif
				activeIndex: -1,
				aliZero: false,
				val: ''
			};
		},
		watch: {
			length(val) {
				const nums = Number(val);
				if (nums !== this.inputArr.length) {
					this.inputArr = this.getArr(nums)
				}
			},
			value(val) {
				this.focus = true;
				val = val.replace(/\s+/g, "")
				this.getVals(val)
			},
			// #ifdef APP-NVUE
			activeIndex(val) {
				if (val == -1 || val == this.length) {
					this.stop = true;
					this.opacity = 1;
				} else {
					this.stop = false;
					const ref = this.inputArr[val]
					this.ref = ref;
					this.opacity = 0;
					this._animation(ref)
				}
			},
			// #endif
			isFocus(val) {
				this.initFocus(val)
			}
		},
		created() {
			this.inputArr = this.getArr(Number(this.length))
			let val = this.value.replace(/\s+/g, "")
			this.getVals(val,true)
		},
		mounted() {
			// #ifndef MP-TOUTIAO
			setTimeout(() => {
				this.initFocus(this.isFocus)
			}, 150)
			// #endif

			// #ifdef MP-TOUTIAO
			setTimeout(() => {
				this.initFocus(this.isFocus)
			}, 300)
			// #endif
		},
		//nvue暂不支持vue3，所以不需要做兼容,此处以防后续兼容
		// #ifdef APP-NVUE
		// #ifndef VUE3
		beforeDestroy() {
			this.stop = true;
		},
		// #endif
		// #ifdef VUE3
		beforeUnmount() {
			this.stop = true;
		},
		// #endif
		// #endif
		methods: {
			initFocus(val) {
				if (this.disabled) return;
				if (val && this.activeIndex === -1) {
					this.activeIndex = 0
				}
				if (!this.value && !val) {
					this.activeIndex = -1
				}
				this.$nextTick(() => {
					this.focus = val
					if (this.focus && !this.native) {
						this.onTap()
					}
				})
			},
			getArr(end) {
				let arr = Array.from(new Array(end + 1).keys()).slice(1);
				arr = arr.map(item => {
					const ref = `fui_ref_${Math.ceil(Math.random() * 10e5).toString(36)}`
					return ref
				})
				return arr;
			},
			// #ifdef APP-NVUE
			_animation(ref) {
				if (!this.$refs[ref] || this.stop || this.ref != ref) return;
				animation.transition(this.$refs[ref][0].ref, {
					styles: {
						opacity: this.opacity
					},
					duration: 400, //ms
					timingFunction: 'linear',
					iterationCount: 'infinite',
					needLayout: false,
					delay: 0 //ms
				}, () => {
					this.opacity = this.opacity == 0 ? 1 : 0;
					setTimeout(() => {
						this._animation(ref)
					}, 200)
				});
			},
			// #endif
			getVals(val, init = false) {
				this.val = val
				if (!val) {
					this.inputVal = []
					this.activeIndex = init ? -1 : 0;
				} else {
					let vals = val.split('')
					let arr = []
					this.inputArr.forEach((item, index) => {
						arr.push(vals[index] || '')
					})
					this.inputVal = arr
					const len = vals.length;
					this.activeIndex = len > this.length ? this.length : len;
					if (len === this.length) {
						this.$emit('complete', {
							detail: {
								value: val
							}
						})
						this.focus = false;
						uni.hideKeyboard()
					}
				}
			},
			onTap() {
				if (this.disabled) return;
				this.focus = true;
				if (this.activeIndex === -1) {
					this.activeIndex = 0
				}
				if (this.activeIndex === this.length) {
					this.activeIndex--;
				}
				this.$emit('focus', {})
			},
			onInput(e) {
				let value = e.detail.value;
				value = value.replace(/\s+/g, "")
				this.getVals(value)
				this.$emit('input', {
					detail: {
						value: value
					}
				})
			},
			onBlur(e) {
				let value = e.detail.value;
				value = value.replace(/\s+/g, "")
				this.focus = false
				// #ifdef MP-ALIPAY
				this.aliZero = false
				// #endif
				if (!value) {
					this.activeIndex = -1;
				}
				this.$emit('blur', {
					detail: {
						value: value
					}
				})
			},
			onConfirm(e) {
				this.focus = false;
				uni.hideKeyboard()
				this.$emit('confirm', e)
			},
			onAliClick() {
				// #ifdef MP-ALIPAY
				setTimeout(() => {
					this.aliZero = true
				}, 50)
				// #endif
			},
			clear() {
				this.val = ''
				this.inputVal = []
				this.activeIndex = -1;
				this.$nextTick(() => {
					this.onTap()
				})
			}
		}
	}
</script>

<style scoped>
	.fui-single__input-wrap {
		position: relative;
		/* #ifdef MP-BAIDU */
		max-width: 100%;
		overflow: hidden;
		/* #endif */
	}

	.fui-single__input {
		/* #ifndef APP-NVUE */
		width: 100%;
		display: flex;
		box-sizing: border-box;
		/* #endif */
		flex: 1;
		flex-direction: row;
		align-items: center;
		justify-content: space-between;
	}


	.fui-sinput__item {
		/* #ifndef APP-NVUE */
		display: flex;
		box-sizing: border-box;
		/* #endif */
		flex-direction: row;
		justify-content: center;
		align-items: center;
		border-style: solid;
		position: relative;
		overflow: hidden;
	}

	.fui-sinput__text {
		position: absolute;
		left: 0;
		top: 0;
		flex: 1;
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
		align-items: center;
		justify-content: center;
		text-align: center;
	}

	.fui-sinput__placeholder {
		text-align: center;
		opacity: 0;
	}

	.fui-sinput__cursor {
		border-radius: 2px;
		width: 0;
	}

	.fui-sinput__cursor-ani {
		width: 2px;
		/* #ifndef APP-NVUE */
		animation: fui_cursor 1s infinite steps(1, start);
		/* #endif */
	}

	/* #ifndef APP-NVUE */
	@keyframes fui_cursor {
		0% {
			opacity: 0;
		}

		50% {
			opacity: 1;
		}

		100% {
			opacity: 0;
		}
	}

	/* #endif */

	.fui-sinput__hidden {
		position: absolute;
		/* #ifndef MP-WEIXIN || MP-QQ */
		width: 100%;
		height: 100%;
		/* #endif */
		left: 0;
		top: 0;
		/* #ifndef MP */
		right: 0;
		bottom: 0;
		flex: 1;
		/* #endif */
		z-index: 2;
		/* #ifdef MP-WEIXIN || MP-QQ || MP-TOUTIAO */
		height: 0rpx;
		width: 0rpx;
		border: none;
		/* #endif */
		margin: 0;
		padding: 0;
		opacity: 0;
		/* #ifdef MP-ALIPAY || MP-BAIDU || MP-TOUTIAO */
		font-size: 0;
		/* #endif */

		/* #ifdef MP-BAIDU */
		transform: scaleX(2);
		transform-origin: 100% center;
		/* #endif */
		color: rgba(0, 0, 0, 0);
	}

	/* #ifdef MP-ALIPAY */
	.fui-sinput__alizero {
		height: 0rpx;
		width: 0rpx;
	}

	/* #endif */

	.fui-sinput__disabled {
		opacity: 0.5;
	}

	/* #ifndef APP-NVUE */
	.fui-sinput__color {
		color: var(--fui-color-title, #181818) !important;
	}

	.fui-sinput__border-color {
		border-color: var(--fui-color-border, #EEEEEE) !important;
	}

	.fui-sinput__active-color {
		border-color: var(--fui-color-primary, #465CFF) !important;
	}

	.fui-sinput__cursor-color {
		background: var(--fui-color-primary, #465CFF) !important;
	}

	/* #endif */
</style>