/* @flow */

import * as React from 'react';
import styled, { css } from 'styled-components';
import PropTypes from 'prop-types';
import colors from 'config/colors';
import { TRANSITION, FONT_WEIGHT, FONT_SIZE } from 'config/variables';

type Props = {
    children: React.Node,
    className?: string,
    onClick?: () => any,
    onMouseEnter?: () => void,
    onMouseLeave?: () => void,
    onFocus?: () => void,
    isDisabled?: boolean,
    isWhite?: boolean,
    isWebUsb?: boolean,
    isTransparent?: boolean,
}

const Wrapper = styled.button`
    padding: ${props => (props.icon ? '4px 24px 4px 15px' : '11px 24px')};
    border-radius: 3px;
    font-size: ${FONT_SIZE.SMALL};
    font-weight: ${FONT_WEIGHT.SMALLEST};
    cursor: pointer;
    background: ${colors.GREEN_PRIMARY};
    color: ${colors.WHITE};
    border: 0;

    &:hover {
        background: ${colors.GREEN_SECONDARY};
    }

    &:active {
        background: ${colors.GREEN_TERTIARY};
    }

    ${props => props.isDisabled && css`
        pointer-events: none;
        color: ${colors.TEXT_SECONDARY};
        background: ${colors.GRAY_LIGHT};
    `}

    ${props => props.isWhite && css`
        background: ${colors.WHITE};
        color: ${colors.TEXT_SECONDARY};
        border: 1px solid ${colors.DIVIDER};

        &:hover {
            color: ${colors.TEXT_PRIMARY};
            background: ${colors.DIVIDER};
        }

        &:active {
            color: ${colors.TEXT_PRIMARY};
            background: ${colors.DIVIDER};
        }
    `}

    ${props => props.isTransparent && css`
        background: transparent;
        border: 0px;
        color: ${colors.TEXT_SECONDARY};

        &:hover,
        &:active {
            color: ${colors.TEXT_PRIMARY};
            background: transparent;
        }
    `}

    ${props => props.isWebUsb && css`
        position: relative;
        padding: 12px 24px 12px 40px;
        background: transparent;
        color: ${colors.GREEN_PRIMARY};
        border: 1px solid ${colors.GREEN_PRIMARY};
        transition: ${TRANSITION.HOVER};

        &:before,
        &:after {
            content: '';
            position: absolute;
            background: ${colors.GREEN_PRIMARY};
            top: 0;
            bottom: 0;
            margin: auto;
            transition: ${TRANSITION.HOVER};
        }

        &:before {
            width: 12px;
            height: 2px;
            left: 18px;
        }

    &:after {
            width: 2px;
            height: 12px;
            left: 23px;
        }

        &:hover {
            background: ${colors.GREEN_PRIMARY};
            color: ${colors.WHITE};

            &:before,
            &:after {
                background: ${colors.WHITE};
            }
        }

        iframe {
            position: absolute;
            top: 0;
            left: 0;
            z-index: 1;
        }
    `}
`;

const Button = ({
    children,
    className = '',
    onClick,
    onMouseEnter,
    onMouseLeave,
    onFocus,
    isDisabled = false,
    isWhite = false,
    isWebUsb = false,
    isTransparent = false,
}: Props) => {
    const newClassName = isWebUsb ? `${className} trezor-webusb-button` : className;
    return (
        <Wrapper
            className={newClassName}
            onClick={onClick}
            onMouseEnter={onMouseEnter}
            onMouseLeave={onMouseLeave}
            onFocus={onFocus}
            isDisabled={isDisabled}
            isWhite={isWhite}
            isWebUsb={isWebUsb}
            isTransparent={isTransparent}
        >
            {children}
        </Wrapper>
    );
};

Button.propTypes = {
    children: PropTypes.node.isRequired,
    className: PropTypes.string,
    onClick: PropTypes.func,
    onMouseEnter: PropTypes.func,
    onMouseLeave: PropTypes.func,
    onFocus: PropTypes.func,
    isDisabled: PropTypes.bool,
    isWhite: PropTypes.bool,
    isWebUsb: PropTypes.bool,
    isTransparent: PropTypes.bool,
};

export default Button;