import * as React from 'react';
import { useState } from 'react';
import { css } from '@patternfly/react-styles';
import styles from '@patternfly/react-styles/css/components/Alert/alert';
import { AlertIcon } from './AlertIcon';
import { capitalize, useOUIAProps, OUIAProps } from '../../helpers';
import { AlertContext } from './AlertContext';
import maxLines from '@patternfly/react-tokens/dist/esm/c_alert__title_max_lines';
import { Tooltip, TooltipPosition } from '../Tooltip';
import { AlertToggleExpandButton } from './AlertToggleExpandButton';

export enum AlertVariant {
  success = 'success',
  danger = 'danger',
  warning = 'warning',
  info = 'info',
  custom = 'custom'
}

/** The main alert component. */

export interface AlertProps extends Omit<React.HTMLProps<HTMLDivElement>, 'action' | 'title'>, OUIAProps {
  /** Close button; use the alert action close button component.  */
  actionClose?: React.ReactNode;
  /** Action links; use a single alert action link component or multiple wrapped in an array
   * or React.Fragment.
   */
  actionLinks?: React.ReactNode;
  /** Content rendered inside the alert. */
  children?: React.ReactNode;
  /** Additional classes to add to the alert.  */
  className?: string;
  /** Set a custom icon to the alert. If not set the icon is set according to the variant. */
  customIcon?: React.ReactNode;
  /** Uniquely identifies the alert. */
  id?: string;
  /** Flag indicating that the alert is expandable. */
  isExpandable?: boolean;
  /** Flag to indicate if the alert is inline. */
  isInline?: boolean;
  /** Flag to indicate if the alert is in a live region. */
  isLiveRegion?: boolean;
  /** Flag to indicate if the alert is plain. */
  isPlain?: boolean;
  /** Function to be executed on alert timeout. Relevant when the timeout prop is set. */
  onTimeout?: () => void;
  /** If set to true, the timeout is 8000 milliseconds. If a number is provided, alert will
   * be dismissed after that amount of time in milliseconds.
   */
  timeout?: number | boolean;
  /** If the user hovers over the alert and `timeout` expires, this is how long to wait
   * before finally dismissing the alert.
   */
  timeoutAnimation?: number;
  /** Title of the alert.  */
  title: React.ReactNode;
  /** Sets the element to use as the alert title. Default is h4. */
  component?: keyof JSX.IntrinsicElements;
  /** Adds accessible text to the alert toggle. */
  toggleAriaLabel?: string;
  /** Position of the tooltip which is displayed if text is truncated. */
  tooltipPosition?:
    | TooltipPosition
    | 'auto'
    | 'top'
    | 'bottom'
    | 'left'
    | 'right'
    | 'top-start'
    | 'top-end'
    | 'bottom-start'
    | 'bottom-end'
    | 'left-start'
    | 'left-end'
    | 'right-start'
    | 'right-end';
  /** Truncate title to number of lines. */
  truncateTitle?: number;
  /** Adds alert variant styles.  */
  variant?: 'success' | 'danger' | 'warning' | 'info' | 'custom';
  /** Variant label text for screen readers. */
  variantLabel?: string;
  /** Value to overwrite the randomly generated data-ouia-component-id.*/
  ouiaId?: number | string;
  /** Set the value of data-ouia-safe. Only set to true when the component is in a static state, i.e. no animations are occurring. At all other times, this value must be false. */
  ouiaSafe?: boolean;
}

export const Alert: React.FunctionComponent<AlertProps> = ({
  variant = AlertVariant.custom,
  isInline = false,
  isPlain = false,
  isLiveRegion = false,
  variantLabel = `${capitalize(variant)} alert:`,
  actionClose,
  actionLinks,
  title,
  component = 'h4',
  children = '',
  className = '',
  ouiaId,
  ouiaSafe = true,
  timeout = false,
  timeoutAnimation = 3000,
  onTimeout = () => {},
  truncateTitle = 0,
  tooltipPosition,
  customIcon,
  isExpandable = false,
  toggleAriaLabel = `${capitalize(variant)} alert details`,
  onMouseEnter = () => {},
  onMouseLeave = () => {},
  id,
  ...props
}: AlertProps) => {
  const ouiaProps = useOUIAProps(Alert.displayName, ouiaId, ouiaSafe, variant);
  const getHeadingContent = (
    <React.Fragment>
      <span c