import { View, ScrollView } from '@tarojs/components'
import React, { useCallback, memo, useEffect, useMemo, useRef, useState, ReactNode, forwardRef, useImperativeHandle } from 'react'
import styles from "./index.module.scss"
import classnames from "classnames";
import Taro, { usePullDownRefresh, useRouter, useDidShow } from '@tarojs/taro';
import { alert } from '@/common/common'
import { formatPriceDiv, formatDateTime, formatWeightDiv } from '@/common/format'
import DropDownItem from '@/components/dropDown-item'
import { GetAddressListApi } from "@/api/addressList";
import Tabs from "../tabs"
import IconFont from '@/components/iconfont/iconfont';
interface Props {
    handCity?: (province: any, city: any) => void,
    value?: any
}

export default memo(forwardRef((props: Props, ref) => {

    useImperativeHandle(ref, () => ({
        close,
        DropDownItemRef
    }))

    const DropDownItemRef = useRef<any>()
    const close = () => {
        DropDownItemRef.current.closePopup()
    }

    //获取地址
    const { fetchData } = GetAddressListApi()
    useEffect(() => {
        getProvince()
    }, [])


    //获取省
    const getProvince = async () => {
        let res = await fetchData({ parent_id: 1 })
        if (res.data) {
            setlist([...res.data.list])
        }
    }


    //已选的集合市
    // const [choseCityArr, setchoseCityArr] = useState<any[]>([])
    const choseCityArr = useRef<any>({ list: [] })

    //省数组
    const [list, setlist] = useState<any[]>([])
    //区数组
    const [cityList, setcityList] = useState<any[]>([])

    //区分在哪一栏
    const [currentValue, setCurrentValue] = useState<number>(1)

    //顶部栏
    const [TarBarList, setTarBarList] = useState<any[]>([{ id: 1, name: '选择省', showBorder: true }, { id: 2, name: '选择市', showBorder: false }])
    const handChose = (item) => {
        TarBarList.map(it => {
            if (it.id === item.id) {
                it.showBorder = true
            } else {
                it.showBorder = false
            }
            setTarBarList([...TarBarList])
            setCurrentValue(item.id)
        })
    }

    //选择省
    const handProvince = (item) => {
        list.map(it => {
            if (item.id == it.id) {
                it.check = true
            }
            return it
        })
        setlist([...list])
        getCity(item.id)
        setCurrentValue(2)
        TarBarList.map(it => {
            if (it.id == currentValue) {
                it.name = item.name
                it.showBorder = false
            } else {
                it.showBorder = true
            }

            return it
        })
        setTarBarList([...TarBarList])
    }

    //获取市
    const getCity = async (id) => {
        let res = await fetchData({ parent_id: id })
        if (res.data) {
            res.data.list.map(item => {
                choseCityArr.current.list.forEach(it => {
                    if (item.id == it.id) {
                        item.check = true
                    }
                })
                return item
            })
            setcityList([...res.data.list])
        }
    }


    //选择市
    const handCity = (item) => {
        cityList.map(it => {
            if (item.id == it.id) {
                it.check = !it.check
            }
            return it
        })
        setcityList([...cityList])
        let cityArr = cityList.filter(next => { return next.check })
        if (item.check) {
            choseCityArr.current.list.push(item)
        } else {
            deleteById(item.id, choseCityArr.current.list)
        }
        //将市区的全部不选后，该省的颜色不高亮
        if (cityArr.length == 0) {
            list.map(item => {
                if (cityList[0]?.parent_id == item.id) {
                    item.check = false
                }
                return item
            })
            setlist([...list])
        }
        let provinceArr = list.filter(next => { return next.check })
        props.handCity?.(provinceArr, choseCityArr.current.list)
    }

    /**
     * 根据id删除数组项
     * @param {Number} id 需要删除的id
     * @param {Array} list 目标数组
     * 
     * @return {Array} 
     */
    function deleteById(id, list) {
        for (let index = list.length - 1; index >= 0; index--) {
            if (list[index] && list[index].id === id) {
                list.splice(index, 1)
            }
        }
        return list
    }

    //重置
    const handReset = () => {
        TarBarList.map((item, index) => {
            if (index == 0) {
                item.name = '选择省'
                item.showBorder = true
            } else {
                item.showBorder = false
            }
            return item
        })
        setTarBarList([...TarBarList])
        setCurrentValue(1)
        choseCityArr.current.list = []
        list.map(item => {
            item.check = false
            return item
        })
        setlist([...list])
        cityList.map(item => {
            item.check = false
            return item
        })
        setcityList([...cityList])
        props.handCity?.('', '')
    }
    return (
        <DropDownItem ref={DropDownItemRef} title={'所有省市'} value={-1} activeColor='#337fff'>
            <View className={styles.mainBox}>
                <Tabs list={TarBarList} handChose={(item) => handChose?.(item)} handReset={() => handReset()}></Tabs>
                {
                    currentValue == 1 && <ScrollView scrollY className={styles.scrollView}>
                        {
                            list.map(item => {
                                return (
                                    <View className={styles.itemBox} onClick={() => handProvince(item)}>
                                        <View className={classnames(item.check ? styles.activeitemProvince : styles.itemProvince)}>{item.name}</View>
                                        <IconFont name={'icon-chakanquanbukehu'} size={50} color={'#d8d8d8'}></IconFont>
                                    </View>
                                )
                            })
                        }
                    </ScrollView>
                }
                {
                    currentValue == 2 && <ScrollView scrollY className={styles.scrollView}>
                        {
                            cityList.map(item => {
                                return (
                                    <View className={styles.itemBox} onClick={() => handCity(item)}>
                                        <View className={classnames(item.check ? styles.activeitemProvince : styles.itemProvince)}>{item.name}</View>
                                        {/* <IconFont name={'icon-chakanquanbukehu'} size={50} color={'#d8d8d8'}></IconFont> */}
                                    </View>
                                )
                            })
                        }
                    </ScrollView>
                }
            </View>
        </DropDownItem>
    )
}))