'use client';

import { useState } from 'react';
import { useRouter } from 'next/navigation';
import {
  Box,
  Drawer,
  AppBar,
  Toolbar,
  List,
  Typography,
  Divider,
  ListItem,
  ListItemButton,
  ListItemIcon,
  ListItemText,
  IconButton,
  Menu,
  MenuItem,
  Avatar,
  Chip,
  Button
} from '@mui/material';
import {
  Dashboard,
  People,
  Gavel,
  Analytics,
  Chat,
  Settings,
  Logout,
  AccountCircle,
  AdminPanelSettings,
  Launch as LaunchIcon,
  Article as PageIcon,
  Share,
  Email as EmailIcon
} from '@mui/icons-material';

interface AdminLayoutProps {
  children: React.ReactNode;
  user?: {
    id: string;
    email: string;
    name: string | null;
    role: string;
  };
}

const drawerWidth = 280;

const menuItems = [
  { text: 'Dashboard', icon: Dashboard, href: '/admin' },
  { text: 'Users', icon: People, href: '/admin/users' },
  { text: 'Pages', icon: PageIcon, href: '/admin/pages' },
  { text: 'Social Media', icon: Share, href: '/admin/social-media' },
  { text: 'Email Settings', icon: EmailIcon, href: '/admin/mailgun' },
  { text: 'Content Moderation', icon: Gavel, href: '/admin/content' },
  { text: 'Analytics', icon: Analytics, href: '/admin/analytics' },
  // { text: 'Chat Monitoring', icon: Chat, href: '/admin/chat' }, // AI Chat disabled
  { text: 'Settings', icon: Settings, href: '/admin/settings' },
];

export function AdminLayout({ children, user }: AdminLayoutProps) {
  const [anchorEl, setAnchorEl] = useState<null | HTMLElement>(null);
  const router = useRouter();

  const handleMenu = (event: React.MouseEvent<HTMLElement>) => {
    setAnchorEl(event.currentTarget);
  };

  const handleClose = () => {
    setAnchorEl(null);
  };

  const handleLogout = async () => {
    try {
      await fetch('/api/admin/auth/logout', {
        method: 'POST',
        credentials: 'include'
      });
      router.push('/admin/login');
      router.refresh();
    } catch (error) {
      console.error('Logout error:', error);
    }
    handleClose();
  };

  const currentPath = typeof window !== 'undefined' ? window.location.pathname : '';

  return (
    <Box sx={{ display: 'flex' }}>
      <AppBar
        position="fixed"
        sx={{
          width: `calc(100% - ${drawerWidth}px)`,
          ml: `${drawerWidth}px`,
          backgroundColor: 'primary.main'
        }}
      >
        <Toolbar>
          <AdminPanelSettings sx={{ mr: 2 }} />
          <Typography variant="h6" noWrap component="div" sx={{ flexGrow: 1 }}>
            Biblical Guide Admin
          </Typography>

          {user && (
            <Box sx={{ display: 'flex', alignItems: 'center', gap: 2 }}>
              <Button
                variant="outlined"
                startIcon={<LaunchIcon />}
                onClick={() => window.open('/', '_blank')}
                sx={{
                  color: 'white',
                  borderColor: 'white',
                  '&:hover': {
                    borderColor: 'white',
                    backgroundColor: 'rgba(255, 255, 255, 0.1)'
                  }
                }}
              >
                Visit Website
              </Button>
              <Chip
                label={user.role}
                color={user.role === 'admin' ? 'error' : 'warning'}
                size="small"
                variant="outlined"
                sx={{ color: 'white', borderColor: 'white' }}
              />
              <IconButton
                size="large"
                aria-label="account of current user"
                aria-controls="menu-appbar"
                aria-haspopup="true"
                onClick={handleMenu}
                color="inherit"
              >
                <Avatar sx={{ width: 32, height: 32 }}>
                  {user.name?.[0] || user.email[0]}
                </Avatar>
              </IconButton>
              <Menu
                id="menu-appbar"
                anchorEl={anchorEl}
                anchorOrigin={{
                  vertical: 'top',
                  horizontal: 'right',
                }}
                keepMounted
                transformOrigin={{
                  vertical: 'top',
                  horizontal: 'right',
                }}
                open={Boolean(anchorEl)}
                onClose={handleClose}
              >
                <MenuItem disabled>
                  <Box>
                    <Typography variant="body2" fontWeight="bold">
                      {user.name || 'Admin User'}
                    </Typography>
                    <Typography variant="caption" color="text.secondary">
                      {user.email}
                    </Typography>
                  </Box>
                </MenuItem>
                <Divider />
                <MenuItem onClick={handleLogout}>
                  <ListItemIcon>
                    <Logout fontSize="small" />
                  </ListItemIcon>
                  Logout
                </MenuItem>
              </Menu>
            </Box>
          )}
        </Toolbar>
      </AppBar>

      <Drawer
        sx={{
          width: drawerWidth,
          flexShrink: 0,
          '& .MuiDrawer-paper': {
            width: drawerWidth,
            boxSizing: 'border-box',
          },
        }}
        variant="permanent"
        anchor="left"
      >
        <Toolbar>
          <Box sx={{ display: 'flex', alignItems: 'center', gap: 1 }}>
            <AdminPanelSettings color="primary" />
            <Typography variant="h6" noWrap>
              Admin Panel
            </Typography>
          </Box>
        </Toolbar>
        <Divider />
        <List>
          {menuItems.map((item) => (
            <ListItem key={item.text} disablePadding>
              <ListItemButton
                selected={currentPath === item.href}
                onClick={() => router.push(item.href)}
                sx={{
                  '&.Mui-selected': {
                    backgroundColor: 'primary.main',
                    color: 'white',
                    '&:hover': {
                      backgroundColor: 'primary.dark',
                    },
                    '& .MuiListItemIcon-root': {
                      color: 'white',
                    },
                  },
                }}
              >
                <ListItemIcon>
                  <item.icon />
                </ListItemIcon>
                <ListItemText primary={item.text} />
              </ListItemButton>
            </ListItem>
          ))}
        </List>
      </Drawer>

      <Box
        component="main"
        sx={{
          flexGrow: 1,
          bgcolor: 'background.default',
          p: 3,
          minHeight: '100vh'
        }}
      >
        <Toolbar />
        {children}
      </Box>
    </Box>
  );
}