import { useState } from "react";
import { useNavigate } from "react-router";
import LogoutOutlinedIcon from "@mui/icons-material/LogoutOutlined";
import SettingsOutlinedIcon from "@mui/icons-material/SettingsOutlined";
import {
  Box,
  Divider,
  ListItemIcon,
  ListItemText,
  Menu,
  MenuItem,
  Typography,
} from "@mui/material";
import { ChevronDown } from "lucide-react";

import { useAuthContext } from "@/providers/auth-context";
import { getPrimaryUserRole } from "@/lib/auth/user-utils";

type UserMenuHeaderProps = {
  initials: string;
  fullname: string;
  email: string;
};

function UserMenuHeader({ initials, fullname, email }: UserMenuHeaderProps) {
  return (
    <Box className="flex items-center gap-3 px-4 py-3">
      <Box
        className="flex shrink-0 items-center justify-center"
        sx={{
          width: 40,
          height: 40,
          borderRadius: "50%",
          background: "linear-gradient(135deg, var(--accent), var(--primary))",
          fontSize: "0.875rem",
          fontWeight: 600,
          color: "#ffffff",
          border: "2px solid var(--color-header-avatar-ring)",
        }}
      >
        {initials}
      </Box>
      <Box>
        <Typography variant="body2" sx={{ fontWeight: 600 }}>
          {fullname}
        </Typography>
        <Typography variant="caption" color="text.secondary">
          {email}
        </Typography>
      </Box>
    </Box>
  );
}

export function AppTopbarUserMenu() {
  const navigate = useNavigate();
  const { user, logout } = useAuthContext();

  const [userAnchor, setUserAnchor] = useState<null | HTMLElement>(null);

  const handleLogout = () => {
    setUserAnchor(null);
    logout();
  };

  const userInitials = user?.fullname
    ? user.fullname
        .split(" ")
        .map((part) => part[0])
        .join("")
        .slice(0, 2)
        .toUpperCase()
    : "U";

  const userRole = getPrimaryUserRole(user?.userRoles);

  return (
    <>
      <Box
        component="button"
        type="button"
        aria-haspopup="true"
        aria-expanded={Boolean(userAnchor)}
        onClick={(event) => setUserAnchor(event.currentTarget)}
        sx={{
          display: "flex",
          alignItems: "center",
          flexShrink: 0,
          gap: "10px",
          py: "5px",
          pl: "6px",
          pr: "10px",
          borderRadius: "9999px",
          border: "none",
          cursor: "pointer",
          backgroundColor: "transparent",
          color: "var(--color-header-text)",
          transition: "background-color var(--duration-fast, 150ms) var(--ease-default, ease)",
          "&:hover": {
            backgroundColor: "var(--color-header-chip-hover)",
          },
        }}
      >
        <Box
          className="flex shrink-0 items-center justify-center"
          sx={{
            width: 34,
            height: 34,
            borderRadius: "50%",
            background: "linear-gradient(135deg, var(--accent), var(--primary))",
            boxShadow: "0 0 0 2px var(--color-header-avatar-ring)",
            fontFamily: "var(--font-display)",
            fontSize: 12,
            fontWeight: 700,
            color: "#ffffff",
          }}
        >
          {userInitials}
        </Box>
        <Box className="text-left leading-tight">
          <Typography
            component="p"
            sx={{
              fontFamily: "var(--font-sans)",
              fontSize: 13,
              fontWeight: 600,
              color: "#ffffff",
              lineHeight: 1.25,
            }}
          >
            {user?.fullname || "User"}
          </Typography>
          <Typography
            component="p"
            sx={{
              fontSize: 11,
              color: "var(--color-header-text-muted)",
              lineHeight: 1.25,
            }}
          >
            {userRole}
          </Typography>
        </Box>
        <ChevronDown
          size={15}
          className="shrink-0"
          style={{ color: "var(--color-header-text-muted)" }}
        />
      </Box>

      <Menu
        anchorEl={userAnchor}
        open={Boolean(userAnchor)}
        onClose={() => setUserAnchor(null)}
        transformOrigin={{ horizontal: "right", vertical: "top" }}
        anchorOrigin={{ horizontal: "right", vertical: "bottom" }}
        slotProps={{
          paper: {
            sx: { width: 260, mt: 1, boxShadow: "var(--shadow-lg)" },
          },
        }}
      >
        <UserMenuHeader
          initials={userInitials}
          fullname={user?.fullname || "User"}
          email={user?.email || ""}
        />
        <Divider />
        <MenuItem
          onClick={() => {
            setUserAnchor(null);
            navigate("/settings/dropdowns");
          }}
        >
          <ListItemIcon>
            <SettingsOutlinedIcon fontSize="small" />
          </ListItemIcon>
          <ListItemText>Settings</ListItemText>
        </MenuItem>
        <MenuItem onClick={handleLogout} sx={{ color: "error.main" }}>
          <ListItemIcon>
            <LogoutOutlinedIcon fontSize="small" color="error" />
          </ListItemIcon>
          <ListItemText>Logout</ListItemText>
        </MenuItem>
      </Menu>
    </>
  );
}