frontend/src/components/CourseCard.tsx

import React, { useState, useContext, MouseEvent } from 'react';
import Collapse from '@material-ui/core/Collapse';
import ExpandIcon from '../assets/expand.png';
import { Course, Group } from '../types/index';
import { coursesContext } from '../contexts/CoursesProvider';
import styled from 'styled-components';
import { makeStyles } from '@material-ui/core/styles';
import { ReactComponent as CloseIcon } from '../assets/close.svg';

const CourseStyled = styled.div`
  display: flex;
  min-height: 40px;
  background-color: rgb(100, 181, 246) !important;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  margin-top: 10px;
  padding-top: 10px;
  border-radius: 10px;
  cursor: pointer;
  align-items: stretch;
  position: relative;
  box-shadow: 9px 9px 8px -2px rgba(0, 0, 0, 0.59);
`;

const CourseNameStyled = styled.div`
  padding-top: 25px;
  padding-bottom: 5px;
  font-size: 16px;
`;

const ClassGroupStyled = styled.div`
  position: relative;
  padding-top: 1px;
  padding-bottom: 1px;
  :hover {
    cursor: pointer;
    background-color: #9ed3ff;
  }
`;

interface ExpandIconProps {
  isSelected: boolean;
}

const Flexbox = styled.div`
  padding-bottom: 5px;
  padding-top: 5px;
  display: flex;
  justify-content: center;
  align-items: center;
`;

const Expand = styled.img<ExpandIconProps>`
  width: 20px;
  transition: 0.2s;
  transform: ${(props) => (props.isSelected ? 'scaleY(-1);' : 'scaleY(1);')};
`;

const TypeClass = styled.div`
  font-size: 12px;
  position: absolute;
  border-radius: 15px;
  background-color: #00506b;
  border: 2px solid;
  min-width: 45px;
  top: 5px;
  left: 5px;
  color: white;
  font-weight: bold;
`;

const useStyles = makeStyles({
  expanded: {
    maxHeight: '244px',
    overflowY: 'auto',
    '&::-webkit-scrollbar': {
      width: '0.4em',
    },
    '&::-webkit-scrollbar-track': {
      '-webkit-box-shadow': 'inset 0 0 6px rgba(1,0,0,0.1)',
    },
    '&::-webkit-scrollbar-thumb': {
      borderRadius: '10px',
      backgroundColor: '#d4b851',
      outline: '1px solid slategrey',
    },
  },
});

const DeleteFromBasketIcon = styled(CloseIcon)`
  width: 20px;
  cursor: pointer;
  position: absolute;
  left: 230px;
  top: -5px;
  &:hover {
    fill: white;
  }
`;

interface CourseCardProps {
  course: Course;
}

export const CourseCard = ({ course }: CourseCardProps) => {
  const classes = useStyles();
  const { addGroup, deleteFromBasket } = useContext(coursesContext)!;
  const [isSelected, setSelected] = useState(false);
  const groups = course.lectures === undefined ? course.classes : [...course.lectures, ...course.classes];

  const onGroupClick = (group: Group, id: number) => addGroup(group, id);

  return (
    <CourseStyled>
      <DeleteFromBasketIcon onClick={() => deleteFromBasket(course.id)}></DeleteFromBasketIcon>
      <CourseNameStyled onClick={() => setSelected(!isSelected)}>{course.name}</CourseNameStyled>
      <Collapse className={classes.expanded} in={isSelected} timeout="auto" unmountOnExit>
        {groups
          .sort((a, b) => b.type.localeCompare(a.type))
          .map((group, index) => (
            <ClassGroupStyled key={index} onClick={() => onGroupClick(group, course.id)}>
              <TypeClass>{group.type === 'CLASS' ? 'Ćw.' : 'Wyk.'}</TypeClass>
              <p>
                {group.time} {group.room} <br></br> {group.lecturer}
              </p>
            </ClassGroupStyled>
          ))}
      </Collapse>
      <Flexbox onClick={() => setSelected(!isSelected)}>
        <Expand isSelected={isSelected} alt="expand" src={ExpandIcon} />
      </Flexbox>
    </CourseStyled>
  );
};