import React, { useState } from "react";
import classnames from "classnames";
import { Input } from "antd";
import styles from "./PriceOptions.less";
import { exportStyleSizeClass } from '../Utils/utils';

/**
 * rowModa: "single" 单行 | "multi" 两行
 * price:number 金额
 * onPriceChange: (value: price) => void
 * size: "small" | "normal" | "large" 样式暂无支持
 * focusScroll:boolean 点击时是否自动滚动到输入框处
 * withTitle:boolean 是否显示标题
 * titleText:string|dom 标题内容 
 * inputPlaceholderText:string 输入框默认内容
 * priceOptions:Array 金额按钮数组，默认为 [100, 600, 800]
 * priceRender:Function 金额按钮内部数字渲染字样
 * inputPriceRender:Function 输入框金额字体渲染字样
 * inputSuffix:string|dom Antd组件Suffix属性
 * injectOptions: { priceBtnClass, priceInputClass } 分别控制具体渲染按钮和输入框样式 
 * inputRef:React.RefObject<any> Input的Ref 
 * @interface Props
 */
interface Props {
  rowMode: "single" | "multi";
  price: number;
  onPriceChange: (v: number) => void;
  size: "small" | "normal" | "large";
  focusScroll: boolean;
  withTitle: boolean;
  allowZero: boolean;
  titleText?: string | JSX.Element[] | JSX.Element;
  inputPlaceholderText?: string;
  priceOptions?: Array<any>;
  priceRender?: Function;
  inputPriceRender?: Function;
  inputSuffix?: string | JSX.Element[] | JSX.Element;
  injectOptions?: {
    priceBtnClass: (isActive: boolean) => any;
    priceInputClass: Function;
  }
  inputRef: React.RefObject<any>;
}

const PriceOptions = ({
  price,
  onPriceChange,
  allowZero,
  rowMode = "single",
  size = "normal",
  focusScroll = true,
  withTitle = true,
  titleText = "Price",
  inputPlaceholderText = "Others",
  priceOptions = [100, 600, 800],
  priceRender = (i: any) => i / 100,
  inputPriceRender = (i: any) => (i ? i / 100 : ""),
  inputSuffix = "￥",
  injectOptions = {
    priceBtnClass: () => undefined,
    priceInputClass: () => undefined,
  },
  inputRef
}: Props) => {
  const defaultOptions = priceOptions;
  // 控制是否为其他金额输入情况
  const [inputStatus, setInputStatus] = useState(false);
  const [inputPrice, setInputPrice] = useState('');

  return (
    <div className={classnames(styles.options, {
      [styles.multi]: rowMode === "multi",
      ...exportStyleSizeClass(styles, size),
    })}>
      {withTitle ? (titleText || null) : null}
      <div className={styles.infoItem}>
        <span className={styles.priceBtn}>
          {defaultOptions.map(item => {
            const isActive = price === item && !inputStatus;
            return (
              <span
                className={classnames({
                  [styles.priceItem]: true,
                  [styles.active]: !injectOptions.priceBtnClass(isActive) && isActive,
                  ...injectOptions.priceBtnClass(isActive),
                })}
                key={item}
                onClick={() => {
                  onPriceChange(item);
                  setInputStatus(false);
                }}
              >
                {priceRender(item)}
              </span>
              );
          })}
        </span>
        <Input
          ref={inputRef}
          className={classnames(styles.priceInput, {...injectOptions.priceInputClass()})}
          onMouseEnter={() => {
            if (inputStatus && inputRef && inputRef.current) {
              inputRef.current.focus();
              inputRef.current.select();
            }
          }}
          suffix={inputSuffix}
          value={inputStatus ? inputPriceRender(inputPrice) : ""}
          placeholder={inputPlaceholderText}
          onChange={e => {
            const n = +e.target.value;
            if (Number.isNaN(n)) {
              return;
            }
            if (!allowZero && n === 0) {
              return;
            }
            // 测试暂时改成1分
            setInputPrice(`${n * 100}`);
            onPriceChange(n * 100);
          }}
          onClick={e => {
            if (!inputStatus) {
              setInputPrice('');
              setInputStatus(true);
            }
          }}
          onFocus={e => {
            e.target.placeholder = "";
            if (inputStatus) {
              setInputPrice(`${price}`);
            } else {
              setInputPrice('');
              setInputStatus(true);
            }
            if (focusScroll) {
              e.target.scrollIntoView();
            }
          }}
          onBlur={e => {
            e.target.placeholder = inputPlaceholderText;
            if (inputPrice) {
              setInputStatus(true);
            } else {
              setInputStatus(false);
            }
          }}
        />
      </div>
    </div>
  );
};

export default PriceOptions;