import { useNavigate } from 'react-router-dom';
import { useAuth } from '../../app/context/AuthProvider';
import { useCallback, useState, useRef, useEffect } from 'react';
import styled from '@emotion/styled';
import { isTestMode } from '../../conf/config';

export function HeaderMenu() {
  const { user, logout } = useAuth();
  const navigate = useNavigate();
  const [isMenuOpen, setIsMenuOpen] = useState(false);
  const menuRef = useRef(null);

  const handleLogout = useCallback(async () => {
    await logout();
    navigate('/login');
    setIsMenuOpen(false);
  }, [logout, navigate]);

  const getInitials = useCallback(() => {
    if (user) {
      const names = user.username.split(' ');
      return names
        .map((name) => name[0])
        .join('')
        .toUpperCase();
    }
  }, [user]);

  const toggleMenu = useCallback(() => {
    setIsMenuOpen((prev) => !prev);
  }, []);

  // Закрытие меню при клике вне его области
  useEffect(() => {
    const handleClickOutside = (event) => {
      if (menuRef.current && !menuRef.current.contains(event.target)) {
        setIsMenuOpen(false);
      }
    };

    document.addEventListener('mousedown', handleClickOutside);
    return () => {
      document.removeEventListener('mousedown', handleClickOutside);
    };
  }, []);

  return (
    <HeaderMenuTag>
      <Logo />
      <TableInfo id="TableInfo" />
      <UserInfo ref={menuRef}>
        <UserAvatar>
          <UserInitials>{user ? getInitials() : ''}</UserInitials>
        </UserAvatar>
        <UserNameAndRole>
          <div className="username">{user?.full_name}</div>
          <div className="role">{user?.role}</div>
        </UserNameAndRole>

        {/* на стенде прода не показываем кнопку выхода */}
        {isTestMode && <DownButton onClick={toggleMenu} isOpen={isMenuOpen} />}
        {(isTestMode && isMenuOpen) && (
          <DropdownMenu>
            <LogoutButton onClick={handleLogout}>Выйти</LogoutButton>
          </DropdownMenu>
        )}
      </UserInfo>
    </HeaderMenuTag>
  );
}

const HeaderMenuTag = styled.div`
  height: 3.75rem;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  padding: 0.75rem 1.5rem 0.75rem 1.5rem;
  width: 100%;
  box-sizing: border-box;
  border-bottom: 0.0625rem solid var(--Stroke, rgba(0, 0, 0, 0.1));
  background: rgba(255, 255, 255, 1);
  position: relative;
`;

const Logo = styled.div`
  width: 7rem;
  height: 2rem;
  display: flex;
  align-items: center;
  background-image: url('images/logo.svg');
  background-repeat: no-repeat;
  background-size: contain;
  z-index: 1;
`;

const TableInfo = styled.div`
  display: flex;
  padding-left: 1.5rem;
  flex: 1;
  height: 100%;
`;

const UserInfo = styled.div`
  width: 12.23rem;
  height: 2.25rem;
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: center;
  gap: 0.75rem;
  position: relative;
`;

const UserAvatar = styled.div`
  width: 2rem;
  height: 2rem;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  border-radius: 33554400rem;
  background: var(--PrimaryLight, rgba(237, 248, 240, 1));
`;

const UserInitials = styled.div`
  color: var(--Primary, rgba(37, 129, 65, 1));
  font-family: Arial;
  font-size: 0.88rem;
  font-weight: 400;
  line-height: 1.25rem;
  letter-spacing: 0rem;
  text-align: left;
`;

const UserNameAndRole = styled.div`
  display: flex;
  flex-direction: column;
  .username {
    color: var(--Black, rgba(31, 31, 31, 1));
    font-size: 0.88rem;
    font-weight: 400;
    line-height: 1.25rem;
    letter-spacing: 0rem;
    text-align: left;
  }
  .role {
    color: var(--GreyDark, rgba(74, 85, 101, 1));
    font-size: 0.75rem;
    font-weight: 400;
    line-height: 1rem;
    letter-spacing: 0rem;
    text-align: left;
  }
`;

const DownButton = styled.button`
  background-image: url('images/Down.svg');
  width: 1rem;
  height: 1rem;
  background-repeat: no-repeat;
  background-size: cover;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease;
  transform: ${(props) => (props.$isOpen ? 'rotate(180deg)' : 'rotate(0deg)')};

  &:hover {
    opacity: 0.7;
  }
`;

const DropdownMenu = styled.div`
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  background: rgba(255, 255, 255, 1);
  border: 0.0625rem solid var(--Stroke, rgba(0, 0, 0, 0.1));
  border-radius: 0.5rem;
  box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.1);
  z-index: 1000;
  min-width: 8rem;
  overflow: hidden;
`;

const LogoutButton = styled.button`
  width: 100%;
  padding: 0.75rem 1rem;
  border: none;
  background: transparent;
  color: var(--Black, rgba(31, 31, 31, 1));
  font-size: 0.88rem;
  font-weight: 400;
  text-align: left;
  cursor: pointer;

  &:hover {
    background: var(--PrimaryLight, #f8eded);
    color: var(--Primary, #812525);
  }
`;