import {
  CircularProgress,
  ClickAwayListener,
  Grow,
  MenuItem,
  MenuList,
  Paper,
  Popper,
  Typography,
} from "@material-ui/core";
import { IconButtonProps, makeStyles, SettingsIcon } from "@saleor/macaw-ui";
import classNames from "classnames";
import React, { useEffect, useRef, useState } from "react";
import { FormattedMessage } from "react-intl";

import { IconButton } from "../IconButton";
import { cardMenuMessages as messages } from "./messages";

const ITEM_HEIGHT = 48;
export interface CardMenuItem {
  disabled?: boolean;
  label: string;
  testId?: string;
  onSelect: () => void;
  loading?: boolean;
  withLoading?: boolean;
  hasError?: boolean;
}

export interface CardMenuProps {
  className?: string;
  disabled?: boolean;
  menuItems: CardMenuItem[];
  outlined?: boolean;
  Icon?: React.ElementType<{}>;
  IconButtonProps?: IconButtonProps;
}

const useStyles = makeStyles(
  theme => ({
    container: {
      zIndex: 1,
    },
    iconButton: {
      background: theme.palette.background.paper,
      borderRadius: "100%",
      height: 32,
      padding: 0,
      width: 32,
    },
    paper: {
      marginTop: theme.spacing(2),
      maxHeight: ITEM_HEIGHT * 4.5,
      overflowY: "scroll",
    },
    loadingContent: {
      width: "100%",
      display: "grid",
      gridTemplateColumns: "1fr 24px",
      gap: theme.spacing(2),
      alignItems: "center",
      justifyContent: "flex-end",
    },
  }),
  { name: "CardMenu" },
);

const CardMenu: React.FC<CardMenuProps> = props => {
  const {
    className,
    disabled,
    menuItems,
    outlined,
    Icon: icon,
    IconButtonProps = {},
    ...rest
  } = props;
  const classes = useStyles(props);

  const anchorRef = useRef<HTMLButtonElement | null>(null);
  const [open, setOpen] = useState(false);

  const handleToggle = () => setOpen(prevOpen => !prevOpen);

  const handleClose = (event: React.MouseEvent<EventTarget>) => {
    if (
      anchorRef.current &&
      anchorRef.current.contains(event.target as HTMLElement)
    ) {
      return;
    }

    setOpen(false);
  };

  const handleListKeyDown = (event: React.KeyboardEvent) => {
    if (event.key === "Tab") {
      event.preventDefault();
      setOpen(false);
    }
  };

  const prevOpen = useRef(open);
  useEffect(() => {
    if (prevOpen.current === true && open === false) {
      anchorRef.current!.focus();
    }

    prevOpen.current = open;
  }, [open]);

  useEffect(() => {
    const hasAnyItemsLoadingOrWithError = menuItems
      ?.filter(({ withLoading }) => withLoading)
      ?.some(({ loading, hasError }) => loading || hasError);

    if (!hasAnyItemsLoadingOrWithError) {
      setOpen(false);
    }
  }, [menuItems]);

  const handleMenuClick = (index: number) => {
    const selectedItem = menuItems[index];
    selectedItem.onSelect();

    if (!selectedItem.withLoading) {
      setOpen(false);
    }
  };

  const isWithLoading = menuItems.some(({ withLoading }) => withLoading);

  const Icon = icon ?? SettingsIcon;

  return (
    <div className={className} {...rest}>
      <IconButton
        data-test-id="show-more-button"
        aria-label="More"
        aria-owns={open ? "long-menu" : null}
        aria-haspopup="true"
        disabled={disabled}
        ref={anchorRef}
        onClick={handleToggle}
        variant={outlined ? "primary" : "secondary"}
        state={open ? "active" : "default"}
        {...IconButtonProps}
      >
        <Icon />
      </IconButton>
      <Popper
        placement="bottom-end"
        className={classes.container}
        open={open}
        anchorEl={anchorRef.current}
        transition
      >
        {({ TransitionProps, placement }) => (
          <Grow
            {...TransitionProps}
            style={{
              transformOrigin:
                placement === "bottom" ? "right top" : "right bottom",
              overflowY: "auto",
            }}
          >
            <Paper className={classes.paper} elevation={8}>
              <ClickAwayListener onClickAway={handleClose}>
                <MenuList
                  autoFocusItem={open}
                  id="menu-list-grow"
                  onKeyDown={handleListKeyDown}
                >
                  {menuItems.map((menuItem, menuItemIndex) => (
                    <MenuItem
                      data-test-id={menuItem.testId}
                      disabled={menuItem.loading || menuItem.disabled}
                      onClick={() => handleMenuClick(menuItemIndex)}
                      key={menuItem.label}
                      button
                    >
                      <div
                        className={classNames(className, {
                          [classes.loadingContent]: isWithLoading,
                        })}
                      >
                        {menuItem.loading ? (
                          <>
                            <Typography variant="subtitle1">
                              <FormattedMessage
                                {...messages.cardMenuItemLoading}
                              />
                            </Typography>
                            <CircularProgress size={24} />
                          </>
                        ) : (
                          <Typography>{menuItem.label}</Typography>
                        )}
                      </div>
                    </MenuItem>
                  ))}
                </MenuList>
              </ClickAwayListener>
            </Paper>
          </Grow>
        )}
      </Popper>
    </div>
  );
};
CardMenu.displayName = "CardMenu";
export default CardMenu;