import React from 'react';
import { Portal } from '../Portal/Portal';
import { css, cx } from 'emotion';
import { stylesFactory, withTheme } from '../../themes';
import { GrafanaTheme } from '@grafana/data';

const getStyles = stylesFactory((theme: GrafanaTheme) => ({
  modal: css`
    position: fixed;
    z-index: ${theme.zIndex.modal};
    width: 100%;
    background: ${theme.colors.pageBg};
    box-shadow: 0 3px 7px rgba(0, 0, 0, 0.3);
    background-clip: padding-box;
    outline: none;

    max-width: 750px;
    left: 0;
    right: 0;
    margin-left: auto;
    margin-right: auto;
    top: 10%;
  `,
  modalBackdrop: css`
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: ${theme.zIndex.modalBackdrop};
    background-color: ${theme.colors.bodyBg};
    opacity: 0.8;
    backdrop-filter: blur(4px);
  `,
  modalHeader: css`
    background: ${theme.background.pageHeader};
    box-shadow: ${theme.shadow.pageHeader};
    border-bottom: 1px soliod ${theme.colors.pageHeaderBorder};
    display: flex;
  `,
  modalHeaderTitle: css`
    font-size: ${theme.typography.heading.h3};
    padding-top: calc(${theme.spacing.d} * 0.75);
    margin: 0 calc(${theme.spacing.d} * 3) 0 calc(${theme.spacing.d} * 1.5);
  `,
  modalHeaderClose: css`
    margin-left: auto;
    padding: 9px ${theme.spacing.d};
  `,
  modalContent: css`
    padding: calc(${theme.spacing.d} * 2);
  `,
}));

interface Props {
  title: string | JSX.Element;
  theme: GrafanaTheme;

  isOpen?: boolean;
  onDismiss?: () => void;

  // If not set will call onDismiss if that is set.
  onClickBackdrop?: () => void;
}

export class UnthemedModal extends React.PureComponent<Props> {
  onDismiss = () => {
    if (this.props.onDismiss) {
      this.props.onDismiss();
    }
  };

  onClickBackdrop = () => {
    this.onDismiss();
  };

  render() {
    const { title, isOpen = false, theme } = this.props;
    const styles = getStyles(theme);

    if (!isOpen) {
      return null;
    }

    return (
      <Portal>
        <div className={cx(styles.modal)}>
          <div className={cx(styles.modalHeader)}>
            {typeof title === 'string' ? <h2 className={cx(styles.modalHeaderTitle)}>{title}</h2> : <>{title}</>}
            <a className={cx(styles.modalHeaderClose)} onClick={this.onDismiss}>
              <i className="fa fa-remove" />
            </a>
          </div>
          <div className={cx(styles.modalContent)}>{this.props.children}</div>
        </div>
        <div className={cx(styles.modalBackdrop)} onClick={this.props.onClickBackdrop || this.onClickBackdrop} />
      </Portal>
    );
  }
}

export const Modal = withTheme(UnthemedModal);