import { validProgress } from './utils';

/**
 * {
 *   '0%': '#afc163',
 *   '75%': '#009900',
 *   '50%': 'green',     ====>     '#afc163 0%, #66FF00 25%, #00CC00 50%, #009900 75%, #ffffff 100%'
 *   '25%': '#66FF00',
 *   '100%': '#ffffff'
 * }
 */
export const sortGradient = gradients => {
  let tempArr = [];
  // eslint-disable-next-line no-restricted-syntax
  for (const [key, value] of Object.entries(gradients)) {
    const formatKey = parseFloat(key.replace(/%/g, ''));
    if (isNaN(formatKey)) {
      return {};
    }
    tempArr.push({
      key: formatKey,
      value,
    });
  }
  tempArr = tempArr.sort((a, b) => a.key - b.key);
  return tempArr.map(({ key, value }) => `${value} ${key}%`).join(', ');
};

/**
 * {
 *   '0%': '#afc163',
 *   '25%': '#66FF00',
 *   '50%': '#00CC00',     ====>  linear-gradient(to right, #afc163 0%, #66FF00 25%,
 *   '75%': '#009900',              #00CC00 50%, #009900 75%, #ffffff 100%)
 *   '100%': '#ffffff'
 * }
 *
 * Then this man came to realize the truth:
 * Besides six pence, there is the moon.
 * Besides bread and butter, there is the bug.
 * And...
 * Besides women, there is the code.
 */
export const handleGradient = strokeColor => {
  const { from = '#1890ff', to = '#1890ff', direction = 'to right', ...rest } = strokeColor;
  if (Object.keys(rest).length !== 0) {
    const sortedGradients = sortGradient(rest);
    return { backgroundImage: `linear-gradient(${direction}, ${sortedGradients})` };
  }
  return { backgroundImage: `linear-gradient(${direction}, ${from}, ${to})` };
};

const Line = {
  functional: true,
  render(h, context) {
    const { props, children } = context;
    const {
      prefixCls,
      percent,
      successPercent,
      strokeWidth,
      size,
      strokeColor,
      strokeLinecap,
    } = props;
    let backgroundProps;
    if (strokeColor && typeof strokeColor !== 'string') {
      backgroundProps = handleGradient(strokeColor);
    } else {
      backgroundProps = {
        background: strokeColor,
      };
    }
    const percentStyle = {
      width: `${validProgress(percent)}%`,
      height: `${strokeWidth || (size === 'small' ? 6 : 8)}px`,
      background: strokeColor,
      borderRadius: strokeLinecap === 'square' ? 0 : '100px',
      ...backgroundProps,
    };
    const successPercentStyle = {
      width: `${validProgress(successPercent)}%`,
      height: `${strokeWidth || (size === 'small' ? 6 : 8)}px`,
      borderRadius: strokeLinecap === 'square' ? 0 : '',
    };
    const successSegment =
      successPercent !== undefined ? (
        <div class={`${prefixCls}-success-bg`} style={successPercentStyle} />
      ) : null;
    return (
      <div>
        <div class={`${prefixCls}-outer`}>
          <div class={`${prefixCls}-inner`}>
            <div class={`${prefixCls}-bg`} style={percentStyle} />
            {successSegment}
          </div>
        </div>
        {children}
      </div>
    );
  },
};

export default Line;