import React, { useCallback } from 'react';

import styled from '@emotion/native';

import { HorizontalSpacer } from '@/components/shared/Spacers';
import { Text } from '@/components/shared/Themed';

type ButtonColor = 'green' | 'red' | 'grey' | 'white';
type LabelColor =  ButtonColor | 'black';
type IconLocation = 'left' | 'right';

interface ButtonProps {
  label?: string;
  color?: ButtonColor;
  labelColor?: LabelColor;
  status?: 'ready' | 'disabled' | 'loading';
  onPress?: () => void;
  secondary?: boolean;
  iconLocation?: IconLocation;
  icon?: any;
}

const Button: React.FC<ButtonProps> = ({
  label,
  color = 'white',
  labelColor = 'black',
  status = 'ready',
  onPress,
  secondary = false,
  icon = undefined,
  iconLocation = 'right'
}: ButtonProps) => {
  const safeOnPress = useCallback(() => onPress?.(), [onPress]);

  return (
    <Container
      secondary={secondary}
      bgColor={color}
      onPress={safeOnPress}
      disabled={status !== 'ready'}
    >
      {icon && iconLocation === 'left' && (
        <>
          <IconContainer>{icon}</IconContainer>
          {label && <HorizontalSpacer widthUnits={2} />}
        </>
      )}

      {secondary ? (
        <SecondaryLabel bgColor={color}>{label}</SecondaryLabel>
      ) : (
        <Label color={labelColor}>{label}</Label>
      )}

      {icon && iconLocation === 'right' && (
        <>
          {label && <HorizontalSpacer widthUnits={2} />}
          <IconContainer>{icon}</IconContainer>
        </>
      )}
    </Container>
  );
};

export default Button;

const Container = styled.TouchableOpacity<{
  bgColor: ButtonColor;
  disabled: boolean;
  secondary: boolean;
}>(({ theme, bgColor, secondary }) => ({
  backgroundColor: theme.colors[bgColor],
  borderWidth: secondary ? 1 : 0,
  borderColor: theme.colors[bgColor],
  borderRadius: 6,
  height: theme.layout.gridUnit * 12,
  justifyContent: 'center',
  paddingHorizontal: theme.layout.gridUnit * 4,
  alignItems: 'center',
  flexDirection: 'row',
}));

const Label = styled(Text)<{ color: LabelColor }>(({ theme, color }) => ({
  color: theme.colors[color],
  fontSize: 16,
  fontWeight: 'semibold',
}));

const SecondaryLabel = styled(Text)<{ bgColor: ButtonColor }>(({ theme, bgColor }) => ({
  color: theme.colors[bgColor],
  fontWeight: 'semibold',
}));

const IconContainer = styled.View(({ theme }) => ({
  height: theme.layout.iconSize.medium,
  aspectRatio: 1,
  alignItems: 'center',
  justifyContent: 'center',
}));