import { computed, ref, watch, unref } from 'vue'
import { useElFormItemInject } from './use-form'
import {
  isEmpty,
  isNotEmpty,
  getLabelByValue,
  isObject,
  isArray,
  isNumber,
  getFieldValue,
  setFieldValue
} from '@cip/utils/util'
import { getValueByTemplate } from '@cip/components/cip-form-input/form-value-store'

const useProxyOtherValue = (props, emitOtherValue) => {
  const result = []
  if (props.config.otherKey) {
    const isStringKey = typeof props.config.otherKey === 'string'
    const otherKey = isStringKey ? [props.config.otherKey] : props.config.otherKey
    otherKey.forEach(key => {
      const proxyValue = computed({
        get () {
          return isStringKey ? props.otherValue : getFieldValue(props.otherValue, key)
        },
        set (val) {
          if (isStringKey) {
            emitOtherValue(val)
          } else {
            const otherValue = props.otherValue
            setFieldValue(otherValue, key, val)
            emitOtherValue(otherValue)
          }
        }
      })
      result.push(proxyValue)
    })
  }
  return result
}
const useFormBasicConfig = (props) => {
  const securityConfig = computed(() => {
    return props.config ?? {}
  })
  const clearable = computed(() => {
    return securityConfig.value.clearable ?? true
  })
  const width = computed(() => {
    return securityConfig.value.width ?? '100%'
  })
  const placeholder = computed(() => {
    return securityConfig.value.placeholder ?? ' '
  })
  return {
    securityConfig, clearable, width, placeholder
  }
}
export const useFormInput = (props, context) => {
  const inputRef = ref()
  const { securityConfig, clearable, width, placeholder } = useFormBasicConfig(props)
  const emitInput = (val) => {
    context.emit('update:modelValue', val)
  }
  const emitModelValue = (val) => {
    emitInput(val)
  }

  const emitOtherValue = (val) => {
    context.emit('update:otherValue', val)
  }
  const proxyOtherValue = useProxyOtherValue(props, emitOtherValue)

  watch(() => securityConfig.value.defaultValue, (defaultValue) => {
    if (props.showTemplate === true) {
      // 处于展示模版模式时，同步展示默认值【注：此模式仅在设计表单时开启】
      emitInput(defaultValue)
    } else {
      // 处于实际值展示模式时, 需要modelValue 和defaultValue都不为空才进行值的更新
      if (isEmpty(props.modelValue) && isNotEmpty(defaultValue)) {
        emitInput(getValueByTemplate(defaultValue))
      }
    }
  }, { immediate: true })
  const proxyValue = computed({
    // 单值时使用
    get () {
      return props.modelValue
    },
    set (val) {
      emitModelValue(val)
    }
  })
  return {
    inputRef,
    proxyValue,
    securityConfig,
    emitInput,
    emitModelValue,
    emitOtherValue,
    proxyOtherValue,
    placeholder,
    clearable,
    width
  }
}
export const useFormView = (props) => {
  const { securityConfig, clearable, width, placeholder } = useFormBasicConfig(props)
  const proxyOtherValue = useProxyOtherValue(props, () => {})
  return {
    securityConfig, clearable, width, placeholder, proxyOtherValue
  }
}
export const useElementFormEvent = () => {
  const elFormItem = useElFormItemInject()
  const handleChange = (val) => {
    elFormItem.formItemMitt?.emit('el.form.change', [val])
  }
  const handleBlur = (val) => {
    console.log(elFormItem, val)
    elFormItem.formItemMitt?.emit('el.form.blur', [val])
  }
  return {
    handleChange,
    handleBlur
  }
}

export const useOptions = (props, multiple, emitInput, emitOtherValue) => {
  const optionProps = computed(() => {
    const { label = 'label', value = 'value', children = 'children' } = props.config?.optionProps ?? {}
    return { label, value, children }
  })
  const splitKey = computed(() => {
    return props.config?.splitKey ?? ','
  })
  const withObject = computed(() => {
    // 传出的值是否为object
    return props.config?.withObject ?? false
  })
  const realArray = computed(() => {
    // 需要返回的shu
    return props.config?.realArray ?? false
  })
  const options = ref([])
  const getOptions = async (val, outVal) => {
    if (props.config.asyncOptions) {
      options.value = await props.config.asyncOptions(val, outVal)
    } else {
      options.value = props.config?.options ?? []
    }

    if (isEmpty(props.modelValue) && props.config.autoSelect && emitInput) { // modelValue为空
      const autoValue = isObjectOption.value ? options.value[0][optionProps.value.value] : options.value[0]
      const autoLabel = isObjectOption.value ? options.value[0][optionProps.value.label] : options.value[0]
      // eslint-disable-next-line no-unused-expressions
      emitInput(autoValue)
      emitOtherValue && emitOtherValue(autoLabel)
    }
  }
  // 计算option类型
  const isObjectOption = computed(() => {
    return isObject(options.value[0])
  })
  // 获取otherValue的值
  const getOtherValueByValue = (value) => {
    if (unref(multiple)) {
      if (withObject.value) {
        return value.map(i => {
          return options.value?.find(v => v[optionProps.value.value] === i) ?? {}
        })
      }
      return value.map(val => getLabelByValue(val, options.value, optionProps.value) ?? val).join(splitKey.value)
    } else {
      if (withObject.value) {
        return options.value?.find(v => v[optionProps.value.value] === value) ?? {}
      }
      return getLabelByValue(value, options.value, optionProps.value) ?? value
    }
  }
  const getValue = (modelValue) => {
    if (unref(multiple)) {
      // 防止空字符串导致的['']错误
      const modelArray = isArray(modelValue) ? modelValue : (modelValue ? modelValue.split(splitKey.value) : [])
      // 如果option的value值是数字型将值转换为数字型，否则就是字符型
      const optionCell = isObjectOption.value ? options.value[0]?.[optionProps.value.value] : options.value[0]
      if (isNumber(optionCell)) {
        return modelArray.map(i => parseInt(i))
      } else {
        return modelArray.map(i => String(i))
      }
    } else {
      return modelValue ?? ''
    }
  }
  const getModelValue = (value) => {
    if (unref(multiple)) {
      if (realArray.value) {
        return value
      } else {
        return isArray(value) ? value.join(splitKey.value) : value
      }
    } else {
      return value
    }
  }
  // 根据otherValue跟随modelValue变化
  const getOtherValue = (modelValue, value) => {
    if (isObjectOption.value) {
      return getOtherValueByValue(value)
    } else {
      return modelValue
    }
  }
  if (!(props.config.dependOn?.length) && !(props.config.outDependOn?.length)) {
    getOptions() // .then(() => { console.log('[init]: getOptions') })
    if (props.config.options) { // 动态表单设计时修改options需要触发此方法
      watch(() => props.config.options, (val) => {
        getOptions() // .then(() => { console.log('[config.options change]: getOptions') })
      })
    }
  } else {
    watch([() => props.dependOnValues, () => props.outDependOnValues], ([dependOnValues, outDependOnValues]) => {
      getOptions(dependOnValues || {}, outDependOnValues || {}) // .then(() => { console.log('[dependOn change]: getOptions') })
    }, { immediate: true })
  }

  return {
    optionProps,
    options,
    getOptions,
    isObjectOption,
    getValue,
    getModelValue,
    getOtherValue
  }
}