<script lang="tsx">
import { defineComponent, watch, computed, ref, reactive, unref, PropType } from 'vue'
import { useI18n } from 'vue-i18n'
// import { t } from 'lance-element-vue/src/locale'
// import InputNumber from 'lance-element-vue/packages/InputNumber'
import InputNumber from '../InputNumber'
// import InputNumberRange from 'lance-element-vue/packages/InputNumberRange'
import InputNumberRange from '../InputNumberRange'
// import CustomRender from 'lance-element-vue/packages/CustomRender'
import CustomRender from '../CustomRender'
// import LeSelect from 'lance-element-vue/packages/Select'
import LeSelect from '../Select'
import { renderOption, getOptions, get_formSlots } from './utils.ts'
import { LeFormItem, ObjectOpts, FormConfigOpts, FormItemSlots, SlotOption } from './formConfig.types'
import { OptionItemProps } from '@/components/Select/select.types.ts'
// import { useFormItems } from './hooks/useForm.tsx'
export const FormConfigProps = {
	forms: {
		type: Array as PropType<LeFormItem[]>,
		required: true
	},
	formData: {
		// 后台传递的初始值 对象 【后期拿操作的表单数据  请使用 submit 的params】
		type: Object as PropType<ObjectOpts>,
		default: () => ({})
	}, // 后台传递过来的 数据
	// form的配置项对象 参考 default_formConfig
	formConfig: {
		// type: Object,
		type: Object as PropType<FormConfigOpts>,
		default: () => ({})
	},
	// 是否可以编辑
	isEdit: {
		type: Boolean,
		default: true
	}
}
const formConfigEmits = ['cancel', 'submit']
const default_formConfig: FormConfigOpts = {
	/**自定义Config*/
	// 默认的formItem内容宽度(eg: input/select/radio...)
	itemWidth: undefined,
	// 默认的formItem 对应的 col 外壳 span 配置
	span: 24,
	// 是否展示 底部操作集合
	showFooter: true,
	// footer下的 提交按钮 描述
	submitBtnText: 'le.btn.confirm',
	// footer下的 提交按钮loading
	submitLoading: false,
	// footer下的 取消按钮 是否显示
	showCancelBtn: false,
	// footer下的 取消按钮 text
	cancelBtnText: 'le.btn.cancel',
	// footer下的 重置按钮 是否显示
	showResetBtn: false,
	// footer下的 重置按钮 text
	resetBtnText: 'le.btn.reset',

	/**
	 * element中的配置
	 * 更多请参考 [https://element-plus.gitee.io/zh-CN/component/form.html]
	 */
	labelPosition: 'right',
	// 表单域标签的后缀
	labelSuffix: ':',
	// 表单内组件的尺寸
	size: 'default'
}
const FormConfig = defineComponent({
	name: 'LeFormConfig',
	components: {
		CustomRender,
		InputNumber,
		InputNumberRange,
		LeSelect
	},
	emits: formConfigEmits,
	props: FormConfigProps,
	setup(props, ctx) {
		const { t } = useI18n()
		const formRef = ref(/*formRef*/)
		/*const queryItemTypeKeys = form => {
			const { prop, itemType } = form
			switch (itemType) {
				// 对Number区间进行特殊处理
				case 'inputNumberRange':
					const propStart = form.propStart || `${prop}Start`
					const propEnd = form.propEnd || `${prop}End`
					return [propStart, propEnd]
				case 'render':
					// /!** !!! 暂不对render类型 进行更多标签处理 *!/
					// return []
				case 'leSelect':
				case 'select':
				case 'radio':
				case 'datePicker':
				case 'inputNumber':
				case 'input':
				default:
					return [prop]
			}
		}*/
		const setItemData = (value, defaultValue?) => {
			if (typeof value !== 'boolean' && typeof value !== 'number') {
				return value || defaultValue
			}
			return value
		}
		const changeFormData = (formData, isInit?) => {
			const { forms } = props,
				// params = reactive({}),
				params = {},
				bindProps = []
			forms.forEach((v, i) => {
				const _prop = v.prop,
					props = v.props // 绑定的其他数据
				let defaultValue: any
				if (v.itemType === 'inputNumberRange') defaultValue = []
				params[_prop] = setItemData(formData[_prop], defaultValue) // 数据初始化
				/*const itemProps = queryItemTypeKeys(v)
				itemProps.map(prop => {
					params[prop] = setItemData(formData[prop]) // 数据初始化
				})*/
				/**fix 自定义inputNumberRange*/
				/*if(v.itemType === 'inputNumberRange') {
					params[_prop] = computed({
						get() {
							return itemProps.map(key => params[key])
						},
						set(values) {
							itemProps.map((key, i) => {
								params[key] = values[i]
							})
							console.error(values, 'values')
						}
					})
				}*/
				// 若该formItem  包含forms列表中未定义的prop 需要从formData取值
				if (Array.isArray(props)) {
					bindProps.push(...props)
				}
			})
			// 赋值其他被绑的的值
			bindProps.map(prop => {
				params[prop] = formData[prop] // 被绑定的其他数据初始化
			})
			if (isInit) {
				return {
					params,
					bindProps
				}
			} else {
				state.params = params
				state.bindProps = bindProps
			}
		}
		const cancelHandler = () => {
			ctx.emit('cancel')
		}
		const submitHandler = submitCallback => {
			getParams((error, params) => {
				if (!error) {
					// 若在父级组件使用 自定义的操作按钮， 可调用callback函数 作为提交操作
					if (typeof submitCallback === 'function') {
						return submitCallback(params)
					}
					ctx.emit('submit', params)
				}
			})
		}
		const getParams = (callback, unValidate = false) => {
			const _getParams = () => {
				const { forms } = props
				const { params, formValueFormats } = state
				const formattedForm = {} // 最后提交后台使用的params对象
				forms.forEach(form => {
					const prop = form.prop
					if (prop) {
						formattedForm[prop] = params[prop]
						// // 对应的form 内部设置有 formValueFormats 函数的值做提交前的最后操作 fn(value, prop)
						// formattedForm[prop] = formValueFormats[prop] ? formValueFormats[prop](params, prop) : params[prop]
					}
					/*queryItemTypeKeys(form).map(prop => {
						formattedForm[prop] = params[prop]
					})*/
					// 对含有 其他prop的数据 赋值
					if (Array.isArray(form.props)) {
						form.props.map(_key => {
							formattedForm[_key] = params[_key]
						})
					}
				})
				if (callback) callback(null, formattedForm)
			}
			if (unValidate) return _getParams()
			formRef.value.validate((valid, errObj) => {
				if (valid) {
					_getParams()
				} else {
					if (callback) callback(errObj)
				}
			})
		}
		const resetHandler = (isAsync = false) => {
			// 是否异步 传入的 formData 重置
			if (isAsync) {
				// 由于 formData 从父级传入后 内部并没有直接使用 固可用做 重置功能
				changeFormData(props.formData)
			} else {
				formRef.value.resetFields()
				const formData = props.formData || {}
				// 额外 props 通过formData 数据进行重置
				state.bindProps.map(prop => {
					state.params[prop] = formData[prop]
				})
			}
		}
		watch(
			() => props.formData,
			(newData, oldData) => {
				// console.warn(JSON.stringify(newData), JSON.stringify(oldData), 'newFormData, oldFormData... 监听  formData')
				changeFormData(newData)
			}
		)
		// 本地数据
		const state = reactive({
			// { params, bindProps }
			...changeFormData(props.formData, true)
			/*params,
			// 额外props 集合
			bindProps: []*/
			/*formValueFormats: props.forms.reduce((res, v) => {
				const { prop, formValueFormat } = v
				if (formValueFormat) {
					// 遍历 集成formValueFormat对象
					res[prop] = formValueFormat
				}
				return res
			}, {})*/
		})
		const local_formConfig = computed(() => {
			return {
				...default_formConfig,
				...props.formConfig
			}
		})
		const itemStyle = computed(() => {
			const { itemWidth } = props.formConfig
			if (itemWidth) {
				return `width: ${itemWidth};`
			}
			return ''
		})
		/*const { renderForms } = useFormItems('FormConfig', {
			props,
			params: state.params,
			slots: ctx.slots,
		})*/
		ctx.expose({
			formRef,
			getParams,
			resetHandler,
			submitHandler,
			cancelHandler
		})
		const vSlots = ctx.slots
		const realForms = computed(() => {
			return (props.forms || []).map((form: LeFormItem) => {
				return {
					...form,
					le_slots: get_formSlots(vSlots, form.slots)
				}
			})
		})
		// render
		return () => {
			const { params } = state
			const { isEdit } = props
			const {
				size,
				gutter,
				span,
				showFooter,
				submitBtnText,
				cancelBtnText,
				resetBtnText,
				submitLoading,
				showCancelBtn,
				showResetBtn,
				...form_config
			} = unref(local_formConfig)

			const itemRender = form => {
				// const propKey = form.prop
				const {
					prop,
					itemType,
					itemWidth,
					options,
					change,
					// 申明: onChange 会导致(类input) change后触发两次(组件定义一次,原生change一次) 对组件定义进行过滤,仅留原生触发,组件触发onChange 用change 替代
					onChange,
					itemStyle: form_itemStyle = '',
					size: _size,
					placeholder,
					t_placeholder,
					le_slots,
					...formOthers
				} = form
				const _options = options || []
				const _itemStyle = unref(itemStyle) + form_itemStyle + (itemWidth ? `;width: ${itemWidth}` : '')
				const _placeholder = t_placeholder ? t(t_placeholder) : placeholder
				let disabled = form.disabled
				if (disabled === undefined) {
					disabled = isEdit === false
				}
				// 优化后的 change事件
				const formatterChange = async () => {
					// console.log(params[prop], `value, params.${prop}, options`, _options)
					if (change) {
						return change(params[prop], _options, params)
					}
				}
				switch (itemType) {
					/* 自定义 le 自定义Select */
					case 'leSelect':
						// leSelect: 基于 element-plus el-select-v2扩展
						const slots_leSelect = {
							default: le_slots.option as SlotOption<OptionItemProps>
						}
						let leStyle = _itemStyle + (/width\:/g.test(_itemStyle) ? '' : ';width: 200px')
						return (
							<LeSelect
								{...formOthers}
								options={_options}
								v-model={params[prop]}
								isPopover={formOthers.isPopover ?? true}
								// 通过teleport插入到body (popper-append-to-body popperAppendToBody已弃用)
								teleported={formOthers.teleported ?? true}
								onChange={formatterChange}
								size={_size ?? size}
								placeholder={_placeholder}
								style={leStyle}
								v-slots={slots_leSelect}
							/>
						)
					/* 自定义 render */
					case 'render':
						return <CustomRender form={form} params={params} />
					/* 下拉框 */
					case 'select':
						return (
							<el-select
								{...formOthers}
								v-model={params[prop]}
								onChange={formatterChange}
								style={_itemStyle}
								disabled={disabled}
								size={_size ?? size}
								placeholder={_placeholder}
							>
								{getOptions(_options, form).map((option, i) => {
									const { label, value, disabled } = option
									return (
										<el-option key={`${value}_${i}`} value={value} label={label} disabled={disabled} title={label}>
											{/*renderOption(ctx.slots, form.slots?.option, option)*/}
											{renderOption(le_slots.option, option)}
										</el-option>
									)
								})}
							</el-select>
						)
					/* 单选框 */
					case 'radio':
						return (
							<el-radio-group
								{...formOthers}
								v-model={params[prop]}
								disabled={disabled}
								size={_size ?? size}
								onChange={formatterChange}
								style={_itemStyle}
							>
								{getOptions(_options, form).map((option, i) => {
									const { label, value, disabled } = option
									return (
										<el-radio key={`${value}_${i}`} label={value} disabled={disabled} title={label}>
											{renderOption(le_slots.option, option)}
										</el-radio>
									)
								})}
							</el-radio-group>
						)
					/* 级联 */
					case 'cascader':
						const slots_cascader = {
							default: le_slots.option as SlotOption<{ data: any; node: any }>
						}
						return (
							<el-cascader
								{...formOthers}
								v-model={params[prop]}
								onChange={formatterChange}
								style={_itemStyle}
								disabled={disabled}
								size={_size ?? size}
								clearable={form.clearable ?? true}
								filterable={form.filterable ?? true}
								options={_options}
								placeholder={_placeholder}
								v-slots={slots_cascader}
							/>
						)
					/* 数字 */
					case 'inputNumber':
						return (
							<InputNumber
								class="rate100"
								{...formOthers}
								slots={le_slots}
								v-model={params[prop]}
								onChange={formatterChange}
								style={_itemStyle}
								disabled={disabled}
								placeholder={_placeholder}
								size={_size ?? size}
								precision={form.precision || 0}
								v-slots={le_slots}
							/>
						)
					/* 数字区间 */
					case 'inputNumberRange':
						const numberChange = (e, propKey) => {
							change && change(params[prop], _options, params, propKey)
						}
						return (
							<InputNumberRange
								prop={prop}
								{...formOthers}
								v-model={params[prop]}
								isValueArray
								onChange={numberChange}
								itemStyle={_itemStyle}
								disabled={disabled}
								placeholder={_placeholder}
								size={_size ?? size}
								precision={form.precision || 0}
								v-slots={formOthers?.slots}
							/>
						)
					/* 日期选择(单日期 || 日期区间) */
					case 'datePicker':
						let dateOpts: any = {}
						dateOpts.valueFormat = form.valueFormat || 'MM/DD/YYYY'
						dateOpts.format = form.format || dateOpts.valueFormat
						// 区间类型
						if (/range$/.test(form.type || '')) {
							dateOpts = Object.assign(dateOpts, {
								startPlaceholder: t(form.startPlaceholder || 'le.filter.startDate'),
								endPlaceholder: t(form.endPlaceholder || 'le.filter.endDate'),
								unlinkPanels: form.unlinkPanels ?? true // 解除联动
							})
						} else {
							dateOpts.placeholder = _placeholder || t('le.filter.selectDate')
						}
						return (
							<el-date-picker
								{...formOthers}
								{...dateOpts}
								v-model={params[prop]}
								onChange={formatterChange}
								style={_itemStyle}
								disabled={disabled}
								size={_size ?? size}
							/>
						)
					/* switch */
					case 'switch':
						return (
							<el-switch
								{...formOthers}
								v-model={params[prop]}
								size={_size ?? size}
								onChange={formatterChange}
								style={_itemStyle}
								disabled={disabled}
							/>
						)
					case 'input':
					default:
						return (
							<el-input
								{...formOthers}
								v-model={params[prop]}
								size={_size ?? size}
								onChange={formatterChange}
								disabled={disabled}
								placeholder={_placeholder}
								style={_itemStyle}
							/>
						)
				}
			}
			const createFooter = () => {
				return (
					<div class="footer">
						<div class="right-actions">
							{showCancelBtn && (
								<el-button class="cancel-button" size={size} onClick={cancelHandler}>
									{t(cancelBtnText)}
								</el-button>
							)}
							{showResetBtn && (
								<el-button class="reset-button" plain size={size} onClick={resetHandler.bind(null, undefined)}>
									{t(resetBtnText)}
								</el-button>
							)}
							<el-button class="submit-button" type="primary" size={size} loading={submitLoading} onClick={submitHandler}>
								{t(submitBtnText)}
							</el-button>
						</div>
					</div>
				)
			}
			return (
				<el-form ref={formRef} class={`le-form-config le-form-config--${size}`} {...form_config} size={size} model={params}>
					<el-row class="form_wrap" gutter={gutter}>
						{/*renderForms({forms: realForms.value, gutter, span})*/}
						{realForms.value.map((form, idx) => {
							const { span: _span, t_label, label, ...others } = form
							const _label = t_label ? t(t_label) : label
							const formItemSlots = {
								label: form.le_slots.label
							}
							return (
								<el-col v-show={form.visible !== false} key={idx} span={_span ?? span}>
									<el-form-item class={form.showLabel === false ? 'hideLabel' : ''} {...others} label={_label} v-slots={formItemSlots}>
										{itemRender(form)}
									</el-form-item>
								</el-col>
							)
						})}
						{/** 额外的插入内容 */}
						{ctx.slots.extraContent?.()}
					</el-row>
					{showFooter && createFooter()}
				</el-form>
			)
		}
	}
})
export default FormConfig

/**
 * eg:  示例  实例参考 views/form/default.vue
 */
</script>
