import React, { useState, useRef, useEffect } from "react";
import {
  Box,
  Link,
  Typography,
  Avatar,
  Grid,
  SxProps,
  Tooltip,
  IconButton,
} from "@mui/material";
import { Card, CardContent, 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";
import { DeleteConfirmation } from "../DeleteConfirmation";

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 = "", elevation = 1, 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) => {
    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: any) => {
                    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) => {
                  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) => {
                e.stopPropagation();
                deleteCandidate(candidate.id);
              }}
            >
              <DeleteIcon />
            </IconButton>
          </Tooltip>
        </Box>
      )}
    </Box>
  );
};

export { CandidateInfo };