import React, { useState, useEffect, useContext } from "react";
import { ListView } from "antd-mobile";
import Modal from "react-modal";
import "./Malls.scss";
import search from "./search.png";
import pos from "./pos.png";
import close_white from "./close_white.png";
import up from "./up.png";
import {
  Mall,
  cityMallsGetter,
  CityMall,
} from "../../js/helpers/data-helper.js";
import { MallCode } from "../../pages/Index/Index";

const getSectionData = (dataBlob, sectionID) => dataBlob[sectionID];
const getRowData = (dataBlob, sectionID, rowID) => dataBlob[rowID];

function genData(ds, cityMalls) {
  const dataBlob = {};
  const sectionIDs = [];
  const rowIDs = [];
  const groupByIndex = (list) =>
    list.reduce((acc, nxt) => {
      acc[nxt.index] = acc[nxt.index] ? [...acc[nxt.index], nxt] : [nxt];
      return acc;
    }, {});
  const data = groupByIndex(cityMalls);
  Object.keys(data).forEach((item, index) => {
    sectionIDs.push(item);
    dataBlob[item] = item;
    rowIDs[index] = [];

    data[item].forEach((city) => {
      rowIDs[index].push(city.name);
      dataBlob[city.name] = city;
    });
  });
  return ds.cloneWithRowsAndSections(dataBlob, sectionIDs, rowIDs);
}

const Malls = ({ isOpen, onRequestClose, setMallCode }) => {
  const [q, setQ] = useState("");
  const [showList, setShowList] = useState(false);
  const [cities, setCities] = useState([]);
  const [currentMall, setCurrentMall] = useState(null);
  const [currentCity, setCurrentCity] = useState(null);
  const [currentMalls, setCurrentMalls] = useState([]);
  const [isMallExpand, setIsMallExpand] = useState(false);
  const [dataSource, setDataSource] = useState(
    new ListView.DataSource({
      getRowData,
      getSectionHeaderData: getSectionData,
      rowHasChanged: (row1, row2) => row1 !== row2,
      sectionHeaderHasChanged: (s1, s2) => s1 !== s2,
    })
  );
  const mallCode = useContext(MallCode);
  const setDefaultCityMall = (list) => {
    setCurrentCity(list[0]);
    setCurrentMall(list[0].malls[0]);
    setCurrentMalls(list[0].malls);
  };

  useEffect(() => {
    document.title = "城市商场选择";
    cityMallsGetter().then((cityMalls) => {
      setCities(cityMalls);
      setDataSource(genData(dataSource, cityMalls));

      if (cityMalls.length) {
        const city = cityMalls.find(({ malls }) =>
          malls.find(({ code }) => mallCode === code)
        );
        if (city) {
          setCurrentCity(city);
          const mall = city.malls.find(({ code }) => mallCode === code);
          if (mall) setCurrentMall(mall);
          setCurrentMalls(city.malls);
        } else setDefaultCityMall(cityMalls);
      }
    });
  }, [mallCode]);

  return (
    <Modal
      isOpen={isOpen}
      style={{ overlay: { zIndex: 10000, background: "#fff" } }}
      ariaHideApp={false}
      className="malls"
      onRequestClose={() => onRequestClose()}
    >
      <div className="malls" onClick={() => setIsMallExpand(false)}>
        <div className="input-wrapper">
          <input
            value={q}
            className="input"
            placeholder="输入城市进行搜索"
            onChange={(e) => setQ(e.target.value)}
            onFocus={() => setShowList(true)}
            onBlur={() => !q && setShowList(false)}
          ></input>
        </div>
        <img className="search-icon" src={search}></img>
        {q && (
          <img className="close" src={close_white} onClick={() => setQ("")} />
        )}
        {showList && (
          <div className="list">
            {cities
              .filter(({ name }) => name.includes(q))
              .map((city) => (
                <div
                  className="item"
                  key={city.name}
                  onClick={() => {
                    setCurrentCity(city);
                    setCurrentMall(city.malls[0]);
                    setCurrentMalls(city.malls);
                    setShowList(false);
                  }}
                >
                  {city.name}
                </div>
              ))}
          </div>
        )}
        {!showList && (
          <div className="main">
            <div className="r1">
              <div className="left">
                <img className="pos" src={pos}></img>
                {currentCity && <span>{currentCity.name}</span>}
                &nbsp;&nbsp;
                {currentMall && <span>{currentMall.name}</span>}
                <img className="up" src={up}></img>
              </div>
              <span className="right">当前定位城市</span>
            </div>
            <div className="r2">切换商场</div>
            <div
              className="malls-wrapper"
              onClick={() => {
                setIsMallExpand(false);
              }}
            >
              <div
                className={"malls1" + (isMallExpand ? " expand" : "")}
                onClick={(e) => {
                  e.stopPropagation();
                }}
              >
                {currentMalls.map((mall) => (
                  <span
                    key={mall.code}
                    className="tag"
                    onClick={() => {
                      console.log("setMallCode", mall.code);
                      setCurrentMall(mall);
                      setIsMallExpand(false);
                      setMallCode(mall.code);
                      onRequestClose();
                      // Taro.reLaunch({
                      //   url: `/pages/index/index?mallId=${mall.id}`
                      // });
                    }}
                  >
                    {mall.name}
                  </span>
                ))}
                {!isMallExpand && (
                  <div
                    className="more"
                    onClick={(e) => {
                      e.stopPropagation();
                      setIsMallExpand(true);
                    }}
                  >
                    更多
                  </div>
                )}
                {isMallExpand && (
                  <img
                    className="fold"
                    src={up}
                    onClick={(e) => {
                      e.stopPropagation();
                      setIsMallExpand(false);
                    }}
                  ></img>
                )}
              </div>
              <ListView.IndexedList
                dataSource={dataSource}
                className="am-list sticky-list"
                useBodyScroll
                renderSectionHeader={(sectionData) => (
                  <div>
                    <div
                      className="sticky"
                      style={{
                        zIndex: 3,
                      }}
                    >
                      {sectionData}
                    </div>
                  </div>
                )}
                renderHeader={() => (
                  <div>
                    <div className="meta">切换城市</div>
                    <div className="city-buttons">
                      {cities.map((city) => (
                        <div
                          key={city.name}
                          className="city-button"
                          onClick={() => {
                            setCurrentCity(city);
                            setCurrentMall(city.malls[0]);
                            setCurrentMalls(city.malls);
                          }}
                        >
                          {city.name}
                        </div>
                      ))}
                    </div>
                  </div>
                )}
                renderRow={(rowData) => (
                  <div
                    key={rowData.name}
                    className="city-button"
                    onClick={() => {
                      setCurrentCity(rowData);
                      setCurrentMalls(rowData.malls);
                      setCurrentMall(rowData.malls[0]);
                    }}
                  >
                    {rowData.name}
                  </div>
                )}
                quickSearchBarStyle={{
                  position: "absolute",
                  top: 25,
                }}
                delayTime={10}
                delayActivityIndicator={
                  <div style={{ padding: 25, textAlign: "center" }}>
                    rendering...
                  </div>
                }
              />
            </div>
          </div>
        )}
      </div>
    </Modal>
  );
};
export default Malls;