import React from 'react';
import PropTypes from 'prop-types';
import styled, { useTheme } from 'styled-components';
import Icon from '../../Icon';
import Loader from '../../Loader';

const easing = 'cubic-bezier(0.19, 1, 0.22, 1)';

const xSmallPadding = '2px 15px';
const smallPadding = '6px 22px';
const mediumPadding = '12px 22px';
const largePadding = '18px 30px';

export const HoverText = styled.span`
  z-index: 100;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  padding: ${props =>
    props.size === 'xsmall'
      ? xSmallPadding
      : props.size === 'small'
      ? smallPadding
      : props.size === 'medium'
      ? mediumPadding
      : props.size === 'large'
      ? largePadding
      : props.link
      ? largePadding
      : largePadding};
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: ${props => props.theme.colors.secondary};
  opacity: 0;
  transform: translateY(-100%);
  transition: all 0.25s ${easing};
  pointer-events: none;
  cursor: ${props => (props.disabled ? 'not-allowed' : 'pointer')};

  ${props => props.customBackgroundColorOnHover && `background: ${props.customBackgroundColorOnHover};`}

  .svg-icon {
    pointer-events: none;
    visibility: hidden;
    opacity: 0;
  }
`;

const Root = styled.button`
  position: relative;
  font-family: ${props => props.theme.fonts.text};
  font-style: normal;
  font-weight: ${props => (props.link ? 600 : 700)};
  font-size: ${props => (props.size === 'large' || props.size === 'medium' ? '18px' : props.size === 'xsmall' ? '10px' : '16px')};
  line-height: 1;
  text-decoration: ${props => (props.link && !props.linkNoUnderline ? 'underline' : 'none')};
  text-decoration-color: ${props => props.link && props.theme.colors.grey.v400};
  margin: 0;
  justify-content: center;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: antialiased;
  font-smoothing: antialiased;

  ${props =>
    props.fullWidth &&
    `
    width: 100%;
  `}

  min-height: ${props => (props.link ? '0px' : props.size === 'xsmall' ? '17px' : '46px')};
  min-width: ${props => (props.size === 'xsmall' ? '60px' : 'none')};
  background-color: ${props => props.theme.colors.grey.v200};
  color: ${props => props.theme.colors.secondary};
  overflow: hidden;
  transform: translate3d(0, 0, 0);
  transition: all 0.15s ease;

  .text,
  .svg-icon {
    z-index: 1;
    position: relative;
    transition: all 0.55s ${easing};
  }

  .text {
    text-align: center;
  }

  &::after {
    z-index: 10;
    content: '';
    position: absolute;
    top: -50%;
    left: -25%;
    display: block;
    width: 150%;
    height: 250%;
    border-radius: 50%;
    background: ${props =>
      props.primary ? props.theme.colors.grey.v100 : props.secondary ? props.theme.colors.black : props.theme.colors.grey.v200};
    ${props => props.customBackgroundColorOnHover && `background: ${props.customBackgroundColorOnHover};`}
    pointer-events: none;
    transform: translateY(-100%);
    transition: all 0.55s ${easing};
  }

  ${props =>
    props.primary &&
    `
      background-color: ${props.theme.colors.primary};
      color: ${props.theme.buttons.primary.color};

      .svg-icon {
        fill: ${props.theme.colors.secondary};
        stroke: ${props.theme.colors.secondary};
      }

      &::after {
        background: ${props.theme.colors.secondary};
      }
    `}

  ${props =>
    props.secondary &&
    `
      background-color: ${props.theme.colors.secondary};
      color: ${props.theme.colors.white};
      .svg-icon {
        fill: ${props.theme.colors.white};
        stroke: ${props.theme.colors.white};
      }
  `};

  ${props =>
    props.link &&
    `
      color: ${props.theme.colors.black};
      background-color: transparent;

      .svg-icon {
        fill: ${props.theme.colors.grey.v400};
        stroke: ${props.theme.colors.grey.v400};
      }

      &::after {
        background: transparent;
      }
  `}

  ${props =>
    !props.active &&
    !props.disabled &&
    !props.link &&
    `
    @media (hover: hover){
      &:hover {
        color: ${props.theme.colors.secondary};

        .svg-icon {
          z-index: 200;
        }

        .text {
          transform: translateY(80%);
        }

        ${HoverText} {
          opacity: 1;
          transform: translateY(0);
        }


        &::after {
          transform: translateY(-10%);
        }
      }
    }
  `};

  height: ${props =>
    props.size === 'large' ? '70px' : props.size === 'small' ? '46px' : props.size === 'xsmall' ? '17px' : '58px'};
  display: flex;
  flex-direction: row;
  align-items: center;
  padding: ${props =>
    props.size === 'xsmall'
      ? xSmallPadding
      : props.size === 'small'
      ? smallPadding
      : props.size === 'medium'
      ? mediumPadding
      : props.size === 'large'
      ? largePadding
      : props.link
      ? largePadding
      : largePadding};
  border-radius: ${props => props.theme.buttons.primary.borderRadius};
  border: none;
  cursor: ${props => (props.disabled ? 'not-allowed' : 'pointer')};

  ${props =>
    props.active &&
    !props.primary &&
    `
        box-shadow: 0px 0px 0px 2px rgba(255, 255, 255, 0.35);
        .svg-icon {
          fill: ${props.theme.colors.black};
        }
      `};

  ${props =>
    props.active &&
    props.primary &&
    `
      box-shadow: 0px 0px 0px 2px rgba(255, 206, 67, 0.35);
      background-color: ${props.theme.colors.secondary};
      color: ${props.theme.colors.primary};
      .svg-icon {
          fill: ${props.theme.colors.primary};
          stroke: ${props.theme.colors.primary};
      }
      `};

  opacity: ${props => (props.disabled ? 0.5 : 1)};

  &:active,
  :focus {
    ${props =>
      props.primary &&
      !props.disabled &&
      `
        box-shadow: 0px 0px 0px 2px rgba(255, 206, 67, 0.35);
        background-color: ${
          props.customBackgroundColorOnHover ? props.customBackgroundColorOnHover : props.theme.colors.secondary
        };
        color: ${props.theme.colors.primary};
        .svg-icon {
            fill: ${props.theme.colors.primary};
            stroke: ${props.theme.colors.primary};
        }
        `};

    ${props =>
      !props.primary &&
      !props.disabled &&
      `
        box-shadow: 0px 0px 0px 2px rgba(255, 255, 255, 0.35);
        .svg-icon {
          fill: ${props.theme.colors.black};
        }
      `};
  }

  &:hover {
    ${props =>
      !props.disabled &&
      !props.active &&
      `
        background-color: ${props.theme.colors.grey.v200};
        color: ${props.theme.colors.secondary};
      `}

    ${props =>
      !props.disabled &&
      props.primary &&
      `
        background-color: ${
          props.customBackgroundColorOnHover ? props.customBackgroundColorOnHover : props.theme.colors.secondary
        };


        ${HoverText} {
          color: ${props.theme.buttons.primary.colorHover};
        }

        .svg-icon {
          fill: ${props.theme.colors.primary};
          stroke: ${props.theme.colors.primary};
        }
      `}

      ${props =>
      !props.disabled &&
      props.secondary &&
      `
        ${HoverText} {
          color: ${props.theme.colors.white};
        }
          background-color: ${props.customBackgroundColorOnHover ? props.customBackgroundColorOnHover : props.theme.colors.black};
        .svg-icon {
          fill: ${props.theme.colors.black};
        }
      `}

    ${props =>
      props.link &&
      `
        color: ${props => props.theme.secondary}
        text-decoration-color: ${props.theme.colors.secondary};
        background-color: transparent;

        .text {
          color: ${props.theme.colors.secondary};
        }

        .svg-icon {
          fill: ${props.theme.colors.secondary};
          stroke: ${props.theme.colors.secondary};
        }
    `}
  }
`;

const Link = styled.a`
  display: flex;
  align-items: center;
  color: ${props => props.theme.colors.grey.v400};
`;

const Button = ({
  primary,
  secondary,
  size,
  children,
  label,
  disabled,
  active,
  link,
  linkNoUnderline,
  iconRight,
  iconLeft,
  loading,
  fullWidth,
  ...props
}) => {
  const theme = useTheme();
  const Content = ({ first, disabled }) => {
    const iconSize = size === 'xsmall' ? 12 : 24;
    return (
      <>
        {iconLeft ? <Icon left iconSize={iconSize} name={iconLeft} /> : null}
        <span
          className={first ? 'text' : ''}
          aria-label={label}
          style={{
            cursor: disabled ? 'not-allowed' : 'pointer'
          }}
        >
          {children}
        </span>
        {iconRight ? <Icon right iconSize={iconSize} name={iconRight} /> : null}
      </>
    );
  };

  Content.propTypes = {
    first: PropTypes.bool,
    disabled: PropTypes.bool
  };

  return (
    <Root
      primary={primary}
      secondary={secondary}
      size={size}
      disabled={disabled || loading}
      active={active}
      link={link}
      linkNoUnderline={linkNoUnderline}
      fullWidth={fullWidth}
      onClick={e => (!disabled ? props.onClick(e) : () => null)}
      customBackgroundColorOnHover={props.customBackgroundColorOnHover}
    >
      {loading ? (
        <Loader color={primary ? theme.colors.secondary : secondary} size={size === 'xsmall' ? 'xsmall' : 'small'} />
      ) : link ? (
        <Link>
          <Content first />
        </Link>
      ) : (
        <>
          <Content first disabled={disabled || loading} />
          <HoverText size={size} customBackgroundColorOnHover={props.customBackgroundColorOnHover}>
            <Content first={false} style={{ pointerEvents: 'auto' }} />
          </HoverText>
        </>
      )}
    </Root>
  );
};

Button.propTypes = {
  /**
   * Color
   */
  primary: PropTypes.bool,
  /**
   * Color
   */
  secondary: PropTypes.bool,
  /**
   * Active
   */
  link: PropTypes.bool,
  /**
   * Add text underline
   */
  linkNoUnderline: PropTypes.bool,
  /**
   * Active
   */
  active: PropTypes.bool,
  /**
   * Active
   */
  loading: PropTypes.bool,
  /**
   * disabled
   */
  disabled: PropTypes.bool,
  /**
   * full Width
   */
  fullWidth: PropTypes.bool,
  /**
   * icon on the left
   */
  iconLeft: PropTypes.oneOf(['ArrowNext', 'Check', 'Download', 'Link']),
  /**
   * icon on the right
   */
  iconRight: PropTypes.oneOf(['ArrowNext', 'Check', 'Download', 'Link']),

  /**
   * How large should the button be?
   */
  size: PropTypes.oneOf(['xsmall', 'small', 'medium', 'large']),
  /**
   * Button contents
   */
  children: PropTypes.any,
  /**
   * label for aria
   */
  label: PropTypes.string,
  /**
   * Optional click handler
   */
  onClick: PropTypes.func,
  /**
   * Optional custom background color (on hover)
   */
  customBackgroundColorOnHover: PropTypes.string
};

Button.defaultProps = {
  primary: false,
  disabled: false,
  size: 'medium',
  onClick: undefined
};

export default Button;