import { useState } from "react";
import { useNavigate } from "react-router-dom";
import CheckCircleOutlineIcon from "@mui/icons-material/CheckCircleOutline";
import LogoutOutlinedIcon from "@mui/icons-material/LogoutOutlined";
import MenuIcon from "@mui/icons-material/Menu";
import NotificationsNoneOutlinedIcon from "@mui/icons-material/NotificationsNoneOutlined";
import PersonOutlineOutlinedIcon from "@mui/icons-material/PersonOutlineOutlined";
import SettingsOutlinedIcon from "@mui/icons-material/SettingsOutlined";
import {
  AppBar,
  Avatar,
  Box,
  Divider,
  IconButton,
  ListItemIcon,
  ListItemText,
  Menu,
  MenuItem,
  Toolbar,
  Typography,
} from "@mui/material";

import { useAuthContext } from "@/providers/auth-context";

type AppTopbarProps = {
  onToggleNav: () => void;
};

export function AppTopbar({ onToggleNav }: AppTopbarProps) {
  const navigate = useNavigate();
  const { user, logout } = useAuthContext();

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

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

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

  return (
    <AppBar
      position="sticky"
      elevation={0}
      sx={{
        height: "var(--spacing-topbar)",
        background: "var(--color-header-gradient)",
        boxShadow: "var(--color-header-shadow)",
        color: "var(--color-header-text)",
      }}
    >
      <Toolbar
        disableGutters
        className="flex justify-between px-4"
        sx={{ minHeight: "var(--spacing-topbar) !important" }}
      >
        <Box className="flex items-center">
          <IconButton
            onClick={onToggleNav}
            aria-label="Toggle navigation"
            sx={{
              color: "var(--color-header-icon)",
              mr: 1.5,
              "&:hover": { backgroundColor: "var(--color-header-surface-hover)" },
            }}
          >
            <MenuIcon />
          </IconButton>
        </Box>

        <Box className="flex items-center gap-1">
          <IconButton
            title="Notifications"
            onClick={(event) => setNotifAnchor(event.currentTarget)}
            sx={{
              color: "var(--color-header-text-muted)",
              "&:hover": {
                color: "var(--color-header-text)",
                backgroundColor: "var(--color-header-chip-hover)",
              },
            }}
          >
            <NotificationsNoneOutlinedIcon fontSize="small" />
          </IconButton>

          <Divider
            orientation="vertical"
            flexItem
            sx={{
              mx: 0.5,
              borderColor: "var(--color-header-surface)",
              alignSelf: "center",
              height: 24,
            }}
          />

          <IconButton
            title={user?.name || "User"}
            onClick={(event) => setUserAnchor(event.currentTarget)}
            sx={{
              color: "var(--color-header-text-muted)",
              "&:hover": {
                color: "var(--color-header-text)",
                backgroundColor: "var(--color-header-chip-hover)",
              },
            }}
          >
            <PersonOutlineOutlinedIcon fontSize="small" />
          </IconButton>
        </Box>
      </Toolbar>

      <Menu
        anchorEl={notifAnchor}
        open={Boolean(notifAnchor)}
        onClose={() => setNotifAnchor(null)}
        transformOrigin={{ horizontal: "right", vertical: "top" }}
        anchorOrigin={{ horizontal: "right", vertical: "bottom" }}
        slotProps={{
          paper: {
            sx: { width: 300, mt: 1, boxShadow: "var(--shadow-lg)" },
          },
        }}
      >
        <Box sx={{ px: 2, py: 1.5, borderBottom: "1px solid var(--border)" }}>
          <Typography variant="subtitle2">Notifications</Typography>
        </Box>
        <Box className="flex flex-col items-center gap-2 px-4 py-6 text-muted-foreground">
          <CheckCircleOutlineIcon sx={{ fontSize: 28, color: "var(--muted)" }} />
          <Typography variant="body2" color="text.secondary">
            No new notifications
          </Typography>
        </Box>
      </Menu>

      <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)" },
          },
        }}
      >
        <Box className="flex items-center gap-3 px-4 py-3">
          <Avatar
            sx={{
              width: 40,
              height: 40,
              bgcolor: "var(--accent)",
              fontSize: "0.875rem",
              fontWeight: 600,
              border: "2px solid var(--color-header-avatar-ring)",
            }}
          >
            {userInitials}
          </Avatar>
          <Box>
            <Typography variant="subtitle2">{user?.name || "User"}</Typography>
            <Typography variant="caption" color="text.secondary">
              {user?.email || ""}
            </Typography>
          </Box>
        </Box>
        <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>
    </AppBar>
  );
}