import styled, { css, CSSProperties, keyframes } from 'styled-components';

import { memo } from 'react';
import { icons, SessionIconSize, SessionIconType } from '.';
import { ClipRule, FillRule } from './Icons';

export type SessionIconProps = {
  iconType: SessionIconType;
  /**
   * iconSize is usually the height of the icon, we then have a ratio for each icons to calculate the width.
   * see sizeIsWidth for how to do the opposite */
  iconSize: SessionIconSize | number;
  iconColor?: string;
  iconRotation?: number;
  iconPadding?: string;
  rotateDuration?: number;
  glowDuration?: number;
  borderRadius?: string;
  glowStartDelay?: number;
  noScale?: boolean;
  backgroundColor?: string;
  style?: CSSProperties;
  dataTestId?: string;
  unreadCount?: number;
  /** for some usecases, we want to fix the width of the icon and have the height be calculated from the ratio of the icon */
  sizeIsWidth?: boolean;
};

const getIconDimensionFromIconSize = (iconSize: SessionIconSize | number) => {
  if (typeof iconSize === 'number') {
    return iconSize;
  }
  switch (iconSize) {
    case 'tiny':
      return 12;
    case 'small':
      return 15;
    case 'medium':
      return 20;
    case 'large':
      return 25;
    case 'huge':
      return 30;
    case 'huge2':
      return 40;
    default:
      return 20;
  }
};

type StyledSvgProps = {
  width: string | number;
  height: string | number;
  iconRotation: number;
  rotateDuration?: number;
  borderRadius?: string;
  iconPadding?: string;
  glowDuration?: number;
  glowStartDelay?: number;
  noScale?: boolean;
  iconColor?: string;
  backgroundColor?: string;
  fill?: string;
  clipRule?: ClipRule;
  filleRule?: FillRule;
};

const rotate = keyframes`
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
`;

/**
 * Creates a glow animation made for multiple element sequentially
 */
const glow = (color: string, glowDuration: number, glowStartDelay: number) => {
  // increase shadow intensity by 3
  const dropShadow = `drop-shadow(0px 0px 6px ${color});`;

  // creating keyframe for sequential animations
  let kf = '';
  const durationWithLoop = glowDuration + 1;
  for (let i = 0; i <= durationWithLoop; i++) {
    const percent = (100 / durationWithLoop) * i;

    if (i === glowStartDelay + 1) {
      kf += `${percent}% {
        filter: ${dropShadow}
        transform: scale(1.1);
      }`;
    } else {
      kf += `${percent}% {
        filter: none;
        transform: scale(0.9);
      }`;
    }
  }
  return keyframes`${kf}`;
};

const animation = (props: {
  rotateDuration?: number;
  glowDuration?: number;
  glowStartDelay?: number;
  iconColor?: string;
  noScale?: boolean;
}) => {
  if (props.rotateDuration) {
    return css`
      animation: ${rotate} ${props.rotateDuration}s linear infinite;
    `;
  }
  if (props.noScale) {
    return css``;
  }

  if (props.glowDuration !== undefined && props.glowStartDelay !== undefined && props.iconColor) {
    return css`
      animation: ${glow(props.iconColor, props.glowDuration, props.glowStartDelay)}
        ${props.glowDuration}s ease infinite;
    `;
  }
  return undefined;
};

const Svg = memo(styled.svg<StyledSvgProps>`
  width: ${props => props.width};
  transform: ${props => `rotate(${props.iconRotation}deg)`};
  ${props => animation(props)};
  border-radius: ${props => props.borderRadius};
  background-color: ${props =>
    props.backgroundColor ? props.backgroundColor : 'var(--button-icon-background-color)'};
  filter: ${props => (props.noScale ? `drop-shadow(0px 0px 4px ${props.iconColor})` : '')};
  fill: ${props => (props.iconColor ? props.iconColor : 'var(--button-icon-stroke-color)')};
  padding: ${props => (props.iconPadding ? props.iconPadding : '')};
  transition: inherit;
`);

const SessionSvg = (
  props: StyledSvgProps & {
    viewBox: string;
    path: string | Array<string>;
    style?: CSSProperties;
    dataTestId?: string;
  }
) => {
  const colorSvg = props.iconColor ? props.iconColor : 'var(--button-icon-stroke-color)';
  const pathArray = props.path instanceof Array ? props.path : [props.path];
  const propsToPick = {
    width: props.width,
    height: props.height,
    rotateDuration: props.rotateDuration,
    iconRotation: props.iconRotation,
    viewBox: props.viewBox,
    glowDuration: props.glowDuration,
    glowStartDelay: props.glowStartDelay,
    iconColor: props.iconColor,
    noScale: props.noScale,
    backgroundColor: props.backgroundColor,
    borderRadius: props.borderRadius,
    iconPadding: props.iconPadding,
    fill: props.fill,
    clipRule: props.clipRule,
    fillRule: props.filleRule,
    style: props.style,
    dataTestId: props.dataTestId,
  };

  return (
    <Svg data-testid={props.dataTestId} {...propsToPick}>
      {pathArray.map((path, index) => {
        return <path key={index} fill={colorSvg} d={path} />;
      })}
    </Svg>
  );
};

export const SessionIcon = (props: SessionIconProps) => {
  const {
    iconType,
    iconColor,
    rotateDuration,
    glowDuration,
    borderRadius,
    glowStartDelay,
    noScale,
    backgroundColor,
    iconPadding,
    style,
    dataTestId,
    sizeIsWidth,
  } = props;
  let { iconSize, iconRotation } = props;
  iconSize = iconSize || 'medium';
  iconRotation = iconRotation || 0;

  const calculatedIconSize = getIconDimensionFromIconSize(iconSize);
  const iconDef = icons[iconType];
  const ratio = iconDef.ratio;
  const fill = iconDef?.fill || undefined;
  const clipRule = iconDef?.clipRule || 'nonzero';
  const fillRule = iconDef?.fillRule || 'nonzero';

  const width = sizeIsWidth ? calculatedIconSize : calculatedIconSize * ratio;
  const height = sizeIsWidth ? calculatedIconSize / ratio : calculatedIconSize;

  return (
    <SessionSvg
      viewBox={iconDef.viewBox}
      path={iconDef.path}
      width={width}
      height={height}
      rotateDuration={rotateDuration}
      glowDuration={glowDuration}
      glowStartDelay={glowStartDelay}
      noScale={noScale}
      borderRadius={borderRadius}
      iconRotation={iconRotation}
      iconColor={iconColor}
      backgroundColor={backgroundColor}
      iconPadding={iconPadding}
      fill={fill}
      clipRule={clipRule}
      filleRule={fillRule}
      style={style}
      dataTestId={dataTestId}
    />
  );
};