import React from "react";
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Switch } from "@/components/ui/switch";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
import { Textarea } from "@/components/ui/textarea";
import { Separator } from "@/components/ui/separator";
import { Settings, Shield, Bell, Database, Globe, Key, Save } from "lucide-react";
import Link from "next/link";

export default function AdminSettingsPage() {
  return (
    <div className="space-y-6">
      <div className="flex items-center justify-between">
        <div>
          <h1 className="text-2xl font-semibold tracking-tight">Admin Settings</h1>
          <p className="text-sm text-muted-foreground mt-1">Configure system settings and preferences</p>
        </div>
        <Button asChild variant="outline" size="sm">
          <Link href="/dashboard">Back to Dashboard</Link>
        </Button>
      </div>

      <div className="grid gap-6 lg:grid-cols-2">
        {/* General Settings */}
        <Card>
          <CardHeader>
            <CardTitle className="flex items-center">
              <Settings className="h-5 w-5 mr-2" />
              General Settings
            </CardTitle>
            <CardDescription>
              Basic platform configuration and preferences
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-6">
            <div className="space-y-2">
              <Label htmlFor="siteName">Site Name</Label>
              <Input id="siteName" defaultValue="Ember Market" />
            </div>
            
            <div className="space-y-2">
              <Label htmlFor="siteDescription">Site Description</Label>
              <Textarea 
                id="siteDescription" 
                defaultValue="A secure cryptocurrency marketplace for vendors and customers"
                rows={3}
              />
            </div>

            <div className="space-y-2">
              <Label htmlFor="defaultCurrency">Default Currency</Label>
              <Select defaultValue="btc">
                <SelectTrigger>
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="btc">Bitcoin (BTC)</SelectItem>
                  <SelectItem value="eth">Ethereum (ETH)</SelectItem>
                  <SelectItem value="ltc">Litecoin (LTC)</SelectItem>
                  <SelectItem value="usdt">Tether (USDT)</SelectItem>
                </SelectContent>
              </Select>
            </div>

            <div className="flex items-center justify-between">
              <div className="space-y-0.5">
                <Label>Maintenance Mode</Label>
                <p className="text-sm text-muted-foreground">
                  Temporarily disable public access
                </p>
              </div>
              <Switch />
            </div>
          </CardContent>
        </Card>

        {/* Security Settings */}
        <Card>
          <CardHeader>
            <CardTitle className="flex items-center">
              <Shield className="h-5 w-5 mr-2" />
              Security Settings
            </CardTitle>
            <CardDescription>
              Configure security policies and authentication
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-6">
            <div className="flex items-center justify-between">
              <div className="space-y-0.5">
                <Label>Two-Factor Authentication</Label>
                <p className="text-sm text-muted-foreground">
                  Require 2FA for all admin accounts
                </p>
              </div>
              <Switch defaultChecked />
            </div>

            <div className="flex items-center justify-between">
              <div className="space-y-0.5">
                <Label>Session Timeout</Label>
                <p className="text-sm text-muted-foreground">
                  Auto-logout after inactivity
                </p>
              </div>
              <Switch defaultChecked />
            </div>

            <div className="space-y-2">
              <Label htmlFor="sessionDuration">Session Duration (minutes)</Label>
              <Input id="sessionDuration" type="number" defaultValue="60" />
            </div>

            <div className="flex items-center justify-between">
              <div className="space-y-0.5">
                <Label>IP Whitelist</Label>
                <p className="text-sm text-muted-foreground">
                  Restrict admin access to specific IPs
                </p>
              </div>
              <Switch />
            </div>

            <div className="space-y-2">
              <Label htmlFor="allowedIPs">Allowed IP Addresses</Label>
              <Textarea 
                id="allowedIPs" 
                placeholder="192.168.1.100&#10;10.0.0.50"
                rows={3}
              />
            </div>
          </CardContent>
        </Card>

        {/* Notification Settings */}
        <Card>
          <CardHeader>
            <CardTitle className="flex items-center">
              <Bell className="h-5 w-5 mr-2" />
              Notification Settings
            </CardTitle>
            <CardDescription>
              Configure alert and notification preferences
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-6">
            <div className="flex items-center justify-between">
              <div className="space-y-0.5">
                <Label>Email Notifications</Label>
                <p className="text-sm text-muted-foreground">
                  Send alerts via email
                </p>
              </div>
              <Switch defaultChecked />
            </div>

            <div className="space-y-2">
              <Label htmlFor="adminEmail">Admin Email</Label>
              <Input id="adminEmail" type="email" defaultValue="admin@ember-market.com" />
            </div>

            <div className="flex items-center justify-between">
              <div className="space-y-0.5">
                <Label>Security Alerts</Label>
                <p className="text-sm text-muted-foreground">
                  Notify on security events
                </p>
              </div>
              <Switch defaultChecked />
            </div>

            <div className="flex items-center justify-between">
              <div className="space-y-0.5">
                <Label>System Alerts</Label>
                <p className="text-sm text-muted-foreground">
                  Notify on system issues
                </p>
              </div>
              <Switch defaultChecked />
            </div>

            <div className="flex items-center justify-between">
              <div className="space-y-0.5">
                <Label>Order Alerts</Label>
                <p className="text-sm text-muted-foreground">
                  Notify on high-value orders
                </p>
              </div>
              <Switch />
            </div>
          </CardContent>
        </Card>

        {/* Database Settings */}
        <Card>
          <CardHeader>
            <CardTitle className="flex items-center">
              <Database className="h-5 w-5 mr-2" />
              Database Settings
            </CardTitle>
            <CardDescription>
              Database configuration and maintenance
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-6">
            <div className="space-y-2">
              <Label htmlFor="backupFrequency">Backup Frequency</Label>
              <Select defaultValue="daily">
                <SelectTrigger>
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="hourly">Hourly</SelectItem>
                  <SelectItem value="daily">Daily</SelectItem>
                  <SelectItem value="weekly">Weekly</SelectItem>
                  <SelectItem value="monthly">Monthly</SelectItem>
                </SelectContent>
              </Select>
            </div>

            <div className="flex items-center justify-between">
              <div className="space-y-0.5">
                <Label>Auto Backup</Label>
                <p className="text-sm text-muted-foreground">
                  Automatically backup database
                </p>
              </div>
              <Switch defaultChecked />
            </div>

            <div className="space-y-2">
              <Label htmlFor="retentionPeriod">Backup Retention (days)</Label>
              <Input id="retentionPeriod" type="number" defaultValue="30" />
            </div>

            <Separator />

            <div className="space-y-2">
              <Label>Database Actions</Label>
              <div className="flex space-x-2">
                <Button variant="outline" size="sm">
                  Create Backup
                </Button>
                <Button variant="outline" size="sm">
                  Optimize Database
                </Button>
              </div>
            </div>
          </CardContent>
        </Card>

        {/* API Settings */}
        <Card>
          <CardHeader>
            <CardTitle className="flex items-center">
              <Key className="h-5 w-5 mr-2" />
              API Settings
            </CardTitle>
            <CardDescription>
              API configuration and rate limiting
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-6">
            <div className="space-y-2">
              <Label htmlFor="apiVersion">API Version</Label>
              <Input id="apiVersion" defaultValue="v1" />
            </div>

            <div className="space-y-2">
              <Label htmlFor="rateLimit">Rate Limit (requests/minute)</Label>
              <Input id="rateLimit" type="number" defaultValue="1000" />
            </div>

            <div className="flex items-center justify-between">
              <div className="space-y-0.5">
                <Label>API Logging</Label>
                <p className="text-sm text-muted-foreground">
                  Log all API requests
                </p>
              </div>
              <Switch defaultChecked />
            </div>

            <div className="space-y-2">
              <Label htmlFor="apiKey">Master API Key</Label>
              <Input id="apiKey" type="password" defaultValue="••••••••••••••••" />
            </div>
          </CardContent>
        </Card>

        {/* System Information */}
        <Card>
          <CardHeader>
            <CardTitle className="flex items-center">
              <Globe className="h-5 w-5 mr-2" />
              System Information
            </CardTitle>
            <CardDescription>
              Platform version and system details
            </CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="flex justify-between">
              <span className="text-sm font-medium">Platform Version</span>
              <span className="text-sm text-muted-foreground">v2.1.0</span>
            </div>
            <div className="flex justify-between">
              <span className="text-sm font-medium">Database Version</span>
              <span className="text-sm text-muted-foreground">MongoDB 6.0</span>
            </div>
            <div className="flex justify-between">
              <span className="text-sm font-medium">Node.js Version</span>
              <span className="text-sm text-muted-foreground">v18.17.0</span>
            </div>
            <div className="flex justify-between">
              <span className="text-sm font-medium">Last Updated</span>
              <span className="text-sm text-muted-foreground">2024-01-15</span>
            </div>
            <div className="flex justify-between">
              <span className="text-sm font-medium">Uptime</span>
              <span className="text-sm text-muted-foreground">15 days, 3 hours</span>
            </div>
          </CardContent>
        </Card>
      </div>

      {/* Save Button */}
      <div className="flex justify-end">
        <Button className="w-full sm:w-auto">
          <Save className="h-4 w-4 mr-2" />
          Save All Settings
        </Button>
      </div>
    </div>
  );
}