import React, { useState, useRef, useEffect } from 'react';
import { Box, Link, Typography, Avatar, SxProps, Tooltip, IconButton } from '@mui/material';
import { Divider, useTheme } from '@mui/material';
import DeleteIcon from '@mui/icons-material/Delete';
import { useMediaQuery } from '@mui/material';
import { Candidate, CandidateAI } from 'types/types';
import { CopyBubble } from 'components/CopyBubble';
import { rest } from 'lodash';
import { AIBanner } from 'components/ui/AIBanner';
import { useAuth } from 'hooks/AuthContext';

interface CandidateInfoProps {
  candidate: Candidate;
  sx?: SxProps;
  action?: string;
  elevation?: number;
  variant?: 'minimal' | 'small' | 'normal' | undefined;
}

const CandidateInfo: React.FC<CandidateInfoProps> = (props: CandidateInfoProps) => {
  const { candidate } = props;
  const { user, apiClient } = useAuth();
  const { sx, action = '', variant = 'normal' } = props;
  const theme = useTheme();
  const isMobile = useMediaQuery(theme.breakpoints.down('md')) || variant === 'minimal';
  const ai: CandidateAI | null = 'isAI' in candidate ? (candidate as CandidateAI) : null;
  const isAdmin = user?.isAdmin;

  // State for description expansion
  const [isDescriptionExpanded, setIsDescriptionExpanded] = useState(false);
  const [shouldShowMoreButton, setShouldShowMoreButton] = useState(false);
  const descriptionRef = useRef<HTMLDivElement>(null);

  // Check if description needs truncation
  useEffect(() => {
    if (descriptionRef.current && candidate.description) {
      const element = descriptionRef.current;
      // Check if the scrollHeight is greater than clientHeight (meaning content is truncated)
      setShouldShowMoreButton(element.scrollHeight > element.clientHeight);
    }
  }, [candidate.description]);

  const deleteCandidate = async (candidateId: string | undefined): Promise<void> => {
    if (candidateId) {
      await apiClient.deleteCandidate(candidateId);
    }
  };

  if (!candidate) {
    return <Box>No user loaded.</Box>;
  }

  return (
    <Box
      sx={{
        display: 'flex',
        transition: 'all 0.3s ease',
        flexGrow: 1,
        p: isMobile ? 1 : 2,
        height: '100%',
        flexDirection: 'column',
        alignItems: 'stretch',
        position: 'relative',
        overflow: 'hidden',
        ...sx,
      }}
      {...rest}
    >
      {ai && <AIBanner variant={variant} />}

      <Box sx={{ display: 'flex', flexDirection: 'row' }}>
        <Avatar
          src={candidate.profileImage ? `/api/1.0/candidates/profile/${candidate.username}` : ''}
          alt={`${candidate.fullName}'s profile`}
          sx={{
            alignSelf: 'flex-start',
            width: isMobile ? 40 : 80,
            height: isMobile ? 40 : 80,
            border: '2px solid #e0e0e0',
          }}
        />

        <Box sx={{ ml: 1 }}>
          <Box
            sx={{
              display: 'flex',
              justifyContent: 'space-between',
              alignItems: 'flex-start',
              mb: 1,
            }}
          >
            <Box>
              <Box
                sx={{
                  display: 'flex',
                  flexDirection: isMobile ? 'column' : 'row',
                  alignItems: 'left',
                  gap: 1,
                  '& > .MuiTypography-root': { m: 0 },
                }}
              >
                {action !== '' && <Typography variant="body1">{action}</Typography>}
                {action === '' && (
                  <Typography
                    variant="h5"
                    component="h1"
                    sx={{
                      fontWeight: 'bold',
                      whiteSpace: 'nowrap',
                    }}
                  >
                    {candidate.fullName}
                  </Typography>
                )}
              </Box>
              <Box sx={{ fontSize: '0.75rem', alignItems: 'center' }}>
                <Link href={`/u/${candidate.username}`}>{`/u/${candidate.username}`}</Link>
                <CopyBubble
                  onClick={(event): void => {
                    event.stopPropagation();
                  }}
                  tooltip="Copy link"
                  content={`${window.location.origin}/u/{candidate.username}`}
                />
              </Box>
            </Box>
          </Box>
        </Box>
      </Box>

      <Box>
        {!isMobile && variant === 'normal' && (
          <Box sx={{ minHeight: '5rem' }}>
            <Typography
              ref={descriptionRef}
              variant="body1"
              color="text.secondary"
              sx={{
                display: '-webkit-box',
                WebkitLineClamp: isDescriptionExpanded ? 'unset' : 3,
                WebkitBoxOrient: 'vertical',
                overflow: 'hidden',
                textOverflow: 'ellipsis',
                lineHeight: 1.5,
                fontSize: '0.8rem !important',
              }}
            >
              {candidate.description}
            </Typography>
            {shouldShowMoreButton && (
              <Link
                component="button"
                variant="body2"
                onClick={(e): void => {
                  e.preventDefault();
                  e.stopPropagation();
                  setIsDescriptionExpanded(!isDescriptionExpanded);
                }}
                sx={{
                  color: theme.palette.primary.main,
                  textDecoration: 'none',
                  cursor: 'pointer',
                  fontSize: '0.725rem',
                  fontWeight: 500,
                  mt: 0.5,
                  display: 'block',
                  '&:hover': {
                    textDecoration: 'underline',
                  },
                }}
              >
                [{isDescriptionExpanded ? 'less' : 'more'}]
              </Link>
            )}
          </Box>
        )}

        {variant !== 'small' && variant !== 'minimal' && (
          <>
            <Divider sx={{ my: 2 }} />

            {candidate.location && (
              <Typography variant="body2" sx={{ mb: 1 }}>
                <strong>Location:</strong> {candidate.location.city},{' '}
                {candidate.location.state || candidate.location.country}
              </Typography>
            )}
            {candidate.email && (
              <Typography variant="body2" sx={{ mb: 1 }}>
                <strong>Email:</strong> {candidate.email}
              </Typography>
            )}
            {candidate.phone && (
              <Typography variant="body2">
                <strong>Phone:</strong> {candidate.phone}
              </Typography>
            )}
          </>
        )}
      </Box>
      {isAdmin && ai && (
        <Box
          sx={{
            display: 'flex',
            flexDirection: 'row',
            justifyContent: 'flex-start',
          }}
        >
          <Tooltip title="Delete Job">
            <IconButton
              size="small"
              onClick={(e): void => {
                e.stopPropagation();
                deleteCandidate(candidate.id);
              }}
            >
              <DeleteIcon />
            </IconButton>
          </Tooltip>
        </Box>
      )}
    </Box>
  );
};

export { CandidateInfo };