<template>
	<view class="uni-easyinput" :class="{ 'uni-easyinput-error': msg }" :style="boxStyle">
		<view class="uni-easyinput__content" :class="inputContentClass" :style="inputContentStyle">
			<uni-icons v-if="prefixIcon" class="content-clear-icon" :type="prefixIcon" color="#c0c4cc" @click="onClickIcon('prefix')" size="22"></uni-icons>
			<textarea
				v-if="type === 'textarea'"
				class="uni-easyinput__content-textarea"
				:class="{ 'input-padding': inputBorder }"
				:name="name"
				:value="val"
				:placeholder="placeholder"
				:placeholderStyle="placeholderStyle"
				:disabled="disabled"
				placeholder-class="uni-easyinput__placeholder-class"
				:maxlength="inputMaxlength"
				:focus="focused"
				:autoHeight="autoHeight"
				:cursor-spacing="cursorSpacing"
				@input="onInput"
				@blur="_Blur"
				@focus="_Focus"
				@confirm="onConfirm"
        @keyboardheightchange="onkeyboardheightchange"
			></textarea>
			<input
				v-else
				:type="type === 'password' ? 'text' : type"
				class="uni-easyinput__content-input"
				:style="inputStyle"
				:name="name"
				:value="val"
				:password="!showPassword && type === 'password'"
				:placeholder="placeholder"
				:placeholderStyle="placeholderStyle"
				placeholder-class="uni-easyinput__placeholder-class"
				:disabled="disabled"
				:maxlength="inputMaxlength"
				:focus="focused"
				:confirmType="confirmType"
				:cursor-spacing="cursorSpacing"
				@focus="_Focus"
				@blur="_Blur"
				@input="onInput"
				@confirm="onConfirm"
        @keyboardheightchange="onkeyboardheightchange"
			/>
			<template v-if="type === 'password' && passwordIcon">
				<!-- 开启密码时显示小眼睛 -->
				<uni-icons
					v-if="isVal"
					class="content-clear-icon"
					:class="{ 'is-textarea-icon': type === 'textarea' }"
					:type="showPassword ? 'eye-slash-filled' : 'eye-filled'"
					:size="22"
					:color="focusShow ? primaryColor : '#c0c4cc'"
					@click="onEyes"
				></uni-icons>
			</template>
			<template v-else-if="suffixIcon">
				<uni-icons v-if="suffixIcon" class="content-clear-icon" :type="suffixIcon" color="#c0c4cc" @click="onClickIcon('suffix')" size="22"></uni-icons>
			</template>
			<template v-else>
				<uni-icons
					v-if="clearable && isVal && !disabled && type !== 'textarea'"
					class="content-clear-icon"
					:class="{ 'is-textarea-icon': type === 'textarea' }"
					type="clear"
					:size="clearSize"
					:color="msg ? '#dd524d' : focusShow ? primaryColor : '#c0c4cc'"
					@click="onClear"
				></uni-icons>
			</template>
			<slot name="right"></slot>
		</view>
	</view>
</template>

<script>
/**
 * Easyinput 输入框
 * @description 此组件可以实现表单的输入与校验，包括 "text" 和 "textarea" 类型。
 * @tutorial https://ext.dcloud.net.cn/plugin?id=3455
 * @property {String}	value	输入内容
 * @property {String }	type	输入框的类型（默认text） password/text/textarea/..
 * 	@value text			文本输入键盘
 * 	@value textarea	多行文本输入键盘
 * 	@value password	密码输入键盘
 * 	@value number		数字输入键盘，注意iOS上app-vue弹出的数字键盘并非9宫格方式
 * 	@value idcard		身份证输入键盘，信、支付宝、百度、QQ小程序
 * 	@value digit		带小数点的数字键盘	，App的nvue页面、微信、支付宝、百度、头条、QQ小程序支持
 * @property {Boolean}	clearable	是否显示右侧清空内容的图标控件，点击可清空输入框内容（默认true）
 * @property {Boolean}	autoHeight	是否自动增高输入区域，type为textarea时有效（默认true）
 * @property {String }	placeholder	输入框的提示文字
 * @property {String }	placeholderStyle	placeholder的样式(内联样式，字符串)，如"color: #ddd"
 * @property {Boolean}	focus	是否自动获得焦点（默认false）
 * @property {Boolean}	disabled	是否禁用（默认false）
 * @property {Number }	maxlength	最大输入长度，设置为 -1 的时候不限制最大长度（默认140）
 * @property {String }	confirmType	设置键盘右下角按钮的文字，仅在type="text"时生效（默认done）
 * @property {Number }	clearSize	清除图标的大小，单位px（默认15）
 * @property {String}	prefixIcon	输入框头部图标
 * @property {String}	suffixIcon	输入框尾部图标
 * @property {String}	primaryColor	设置主题色（默认#2979ff）
 * @property {Boolean}	trim	是否自动去除两端的空格
 * @property {Boolean}	cursorSpacing	指定光标与键盘的距离，单位 px
 * @value both	去除两端空格
 * @value left	去除左侧空格
 * @value right	去除右侧空格
 * @value start	去除左侧空格
 * @value end		去除右侧空格
 * @value all		去除全部空格
 * @value none	不去除空格
 * @property {Boolean}	inputBorder	是否显示input输入框的边框（默认true）
 * @property {Boolean}	passwordIcon	type=password时是否显示小眼睛图标
 * @property {Object}	styles	自定义颜色
 * @event {Function}	input	输入框内容发生变化时触发
 * @event {Function}	focus	输入框获得焦点时触发
 * @event {Function}	blur	输入框失去焦点时触发
 * @event {Function}	confirm	点击完成按钮时触发
 * @event {Function}	iconClick	点击图标时触发
 * @example <uni-easyinput v-model="mobile"></uni-easyinput>
 */
function obj2strClass(obj) {
	let classess = '';
	for (let key in obj) {
		const val = obj[key];
		if (val) {
			classess += `${key} `;
		}
	}
	return classess;
}

function obj2strStyle(obj) {
	let style = '';
	for (let key in obj) {
		const val = obj[key];
		style += `${key}:${val};`;
	}
	return style;
}
export default {
	name: 'uni-easyinput',
	emits: ['click', 'iconClick', 'update:modelValue', 'input', 'focus', 'blur', 'confirm', 'clear', 'eyes', 'change', 'keyboardheightchange'],
	model: {
		prop: 'modelValue',
		event: 'update:modelValue'
	},
	options: {
		virtualHost: true
	},
	inject: {
		form: {
			from: 'uniForm',
			default: null
		},
		formItem: {
			from: 'uniFormItem',
			default: null
		}
	},
	props: {
		name: String,
		value: [Number, String],
		modelValue: [Number, String],
		type: {
			type: String,
			default: 'text'
		},
		clearable: {
			type: Boolean,
			default: true
		},
		autoHeight: {
			type: Boolean,
			default: false
		},
		placeholder: {
			type: String,
			default: ' '
		},
		placeholderStyle: String,
		focus: {
			type: Boolean,
			default: false
		},
		disabled: {
			type: Boolean,
			default: false
		},
		maxlength: {
			type: [Number, String],
			default: 140
		},
		confirmType: {
			type: String,
			default: 'done'
		},
		clearSize: {
			type: [Number, String],
			default: 24
		},
		inputBorder: {
			type: Boolean,
			default: true
		},
		prefixIcon: {
			type: String,
			default: ''
		},
		suffixIcon: {
			type: String,
			default: ''
		},
		trim: {
			type: [Boolean, String],
			default: false
		},
		cursorSpacing: {
			type: Number,
			default: 0
		},
		passwordIcon: {
			type: Boolean,
			default: true
		},
		primaryColor: {
			type: String,
			default: '#2979ff'
		},
		styles: {
			type: Object,
			default() {
				return {
					color: '#333',
					backgroundColor: '#fff',
					disableColor: '#F7F6F6',
					borderColor: '#e5e5e5'
				};
			}
		},
		errorMessage: {
			type: [String, Boolean],
			default: ''
		}
	},
	data() {
		return {
			focused: false,
			val: '',
			showMsg: '',
			border: false,
			isFirstBorder: false,
			showClearIcon: false,
			showPassword: false,
			focusShow: false,
			localMsg: '',
			isEnter: false // 用于判断当前是否是使用回车操作
		};
	},
	computed: {
		// 输入框内是否有值
		isVal() {
			const val = this.val;
			// fixed by mehaotian 处理值为0的情况，字符串0不在处理范围
			if (val || val === 0) {
				return true;
			}
			return false;
		},

		msg() {
			// console.log('computed', this.form, this.formItem);
			// if (this.form) {
			// 	return this.errorMessage || this.formItem.errMsg;
			// }
			// TODO 处理头条 formItem 中 errMsg 不更新的问题
			return this.localMsg || this.errorMessage;
		},
		// 因为uniapp的input组件的maxlength组件必须要数值，这里转为数值，用户可以传入字符串数值
		inputMaxlength() {
			return Number(this.maxlength);
		},

		// 处理外层样式的style
		boxStyle() {
			return `color:${this.inputBorder && this.msg ? '#e43d33' : this.styles.color};`;
		},
		// input 内容的类和样式处理
		inputContentClass() {
			return obj2strClass({
				'is-input-border': this.inputBorder,
				'is-input-error-border': this.inputBorder && this.msg,
				'is-textarea': this.type === 'textarea',
				'is-disabled': this.disabled,
				'is-focused': this.focusShow
			});
		},
		inputContentStyle() {
			const focusColor = this.focusShow ? this.primaryColor : this.styles.borderColor;
			const borderColor = this.inputBorder && this.msg ? '#dd524d' : focusColor;
			return obj2strStyle({
				'border-color': borderColor || '#e5e5e5',
				'background-color': this.disabled ? this.styles.disableColor : this.styles.backgroundColor
			});
		},
		// input右侧样式
		inputStyle() {
			const paddingRight = this.type === 'password' || this.clearable || this.prefixIcon ? '' : '10px';
			return obj2strStyle({
				'padding-right': paddingRight,
				'padding-left': this.prefixIcon ? '' : '10px'
			});
		}
	},
	watch: {
		value(newVal) {
			this.val = newVal;
		},
		modelValue(newVal) {
			this.val = newVal;
		},
		focus(newVal) {
			this.$nextTick(() => {
				this.focused = this.focus;
				this.focusShow = this.focus;
			});
		}
	},
	created() {
		this.init();
		// TODO 处理头条vue3 computed 不监听 inject 更改的问题（formItem.errMsg）
		if (this.form && this.formItem) {
			this.$watch('formItem.errMsg', newVal => {
				this.localMsg = newVal;
			});
		}
	},
	mounted() {
		this.$nextTick(() => {
			this.focused = this.focus;
			this.focusShow = this.focus;
		});
	},
	methods: {
		/**
		 * 初始化变量值
		 */
		init() {
			if (this.value || this.value === 0) {
				this.val = this.value;
			} else if (this.modelValue || this.modelValue === 0 || this.modelValue === '') {
				this.val = this.modelValue;
			} else {
				this.val = null;
			}
		},

		/**
		 * 点击图标时触发
		 * @param {Object} type
		 */
		onClickIcon(type) {
			this.$emit('iconClick', type);
		},

		/**
		 * 显示隐藏内容，密码框时生效
		 */
		onEyes() {
			this.showPassword = !this.showPassword;
			this.$emit('eyes', this.showPassword);
		},

		/**
		 * 输入时触发
		 * @param {Object} event
		 */
		onInput(event) {
			let value = event.detail.value;
			// 判断是否去除空格
			if (this.trim) {
				if (typeof this.trim === 'boolean' && this.trim) {
					value = this.trimStr(value);
				}
				if (typeof this.trim === 'string') {
					value = this.trimStr(value, this.trim);
				}
			}
			if (this.errMsg) this.errMsg = '';
			this.val = value;
			// TODO 兼容 vue2
			this.$emit('input', value);
			// TODO　兼容　vue3
			this.$emit('update:modelValue', value);
		},

		/**
		 * 外部调用方法
		 * 获取焦点时触发
		 * @param {Object} event
		 */
		onFocus() {
			this.$nextTick(() => {
				this.focused = true;
			});
			this.$emit('focus', null);
		},

		_Focus(event) {
			this.focusShow = true;
			this.$emit('focus', event);
		},

		/**
		 * 外部调用方法
		 * 失去焦点时触发
		 * @param {Object} event
		 */
		onBlur() {
			this.focused = false;
			this.$emit('focus', null);
		},
		_Blur(event) {
			let value = event.detail.value;
			this.focusShow = false;
			this.$emit('blur', event);
			// 根据类型返回值，在event中获取的值理论上讲都是string
			if (this.isEnter === false) {
				this.$emit('change', this.val);
			}
			// 失去焦点时参与表单校验
			if (this.form && this.formItem) {
				const { validateTrigger } = this.form;
				if (validateTrigger === 'blur') {
					this.formItem.onFieldChange();
				}
			}
		},

		/**
		 * 按下键盘的发送键
		 * @param {Object} e
		 */
		onConfirm(e) {
			this.$emit('confirm', this.val);
			this.isEnter = true;
			this.$emit('change', this.val);
			this.$nextTick(() => {
				this.isEnter = false;
			});
		},

		/**
		 * 清理内容
		 * @param {Object} event
		 */
		onClear(event) {
			this.val = '';
			// TODO 兼容 vue2
			this.$emit('input', '');
			// TODO 兼容 vue2
			// TODO　兼容　vue3
			this.$emit('update:modelValue', '');
			// 点击叉号触发
			this.$emit('clear');
		},

    /**
     * 键盘高度发生变化的时候触发此事件
     * 兼容性：微信小程序2.7.0+、App 3.1.0+
     * @param {Object} event
     */
    onkeyboardheightchange(event) {
      this.$emit("keyboardheightchange",event);
    },

		/**
		 * 去除空格
		 */
		trimStr(str, pos = 'both') {
			if (pos === 'both') {
				return str.trim();
			} else if (pos === 'left') {
				return str.trimLeft();
			} else if (pos === 'right') {
				return str.trimRight();
			} else if (pos === 'start') {
				return str.trimStart();
			} else if (pos === 'end') {
				return str.trimEnd();
			} else if (pos === 'all') {
				return str.replace(/\s+/g, '');
			} else if (pos === 'none') {
				return str;
			}
			return str;
		}
	}
};
</script>

<style lang="scss">
$uni-error: #e43d33;
$uni-border-1: #dcdfe6 !default;

.uni-easyinput {
	/* #ifndef APP-NVUE */
	width: 100%;
	/* #endif */
	flex: 1;
	position: relative;
	text-align: left;
	color: #333;
	font-size: 14px;
}

.uni-easyinput__content {
	flex: 1;
	/* #ifndef APP-NVUE */
	width: 100%;
	display: flex;
	box-sizing: border-box;
	// min-height: 36px;
	/* #endif */
	flex-direction: row;
	align-items: center;
	// 处理border动画刚开始显示黑色的问题
	border-color: #fff;
	transition-property: border-color;
	transition-duration: 0.3s;
}

.uni-easyinput__content-input {
	/* #ifndef APP-NVUE */
	width: auto;
	/* #endif */
	position: relative;
	overflow: hidden;
	flex: 1;
	line-height: 1;
	font-size: 14px;
	height: 35px;
	// min-height: 36px;
}

.uni-easyinput__placeholder-class {
	color: #999;
	font-size: 12px;
	// font-weight: 200;
}

.is-textarea {
	align-items: flex-start;
}

.is-textarea-icon {
	margin-top: 5px;
}

.uni-easyinput__content-textarea {
	position: relative;
	overflow: hidden;
	flex: 1;
	line-height: 1.5;
	font-size: 14px;
	margin: 6px;
	margin-left: 0;
	height: 80px;
	min-height: 80px;
	/* #ifndef APP-NVUE */
	min-height: 80px;
	width: auto;
	/* #endif */
}

.input-padding {
	padding-left: 10px;
}

.content-clear-icon {
	padding: 0 5px;
}

.label-icon {
	margin-right: 5px;
	margin-top: -1px;
}

// 显示边框
.is-input-border {
	/* #ifndef APP-NVUE */
	display: flex;
	box-sizing: border-box;
	/* #endif */
	flex-direction: row;
	align-items: center;
	border: 1px solid $uni-border-1;
	border-radius: 4px;
	/* #ifdef MP-ALIPAY */
	overflow: hidden;
	/* #endif */
}

.uni-error-message {
	position: absolute;
	bottom: -17px;
	left: 0;
	line-height: 12px;
	color: $uni-error;
	font-size: 12px;
	text-align: left;
}

.uni-error-msg--boeder {
	position: relative;
	bottom: 0;
	line-height: 22px;
}

.is-input-error-border {
	border-color: $uni-error;

	.uni-easyinput__placeholder-class {
		color: mix(#fff, $uni-error, 50%);
	}
}

.uni-easyinput--border {
	margin-bottom: 0;
	padding: 10px 15px;
	// padding-bottom: 0;
	border-top: 1px #eee solid;
}

.uni-easyinput-error {
	padding-bottom: 0;
}

.is-first-border {
	/* #ifndef APP-NVUE */
	border: none;
	/* #endif */
	/* #ifdef APP-NVUE */
	border-width: 0;
	/* #endif */
}

.is-disabled {
	background-color: #f7f6f6;
	color: #d5d5d5;

	.uni-easyinput__placeholder-class {
		color: #d5d5d5;
		font-size: 12px;
	}
}
</style>
