import React, { useState, useEffect } from 'react';
import { Card } from '../ui/card';
import { Button } from '../ui/button';
import { StatCard } from '../dashboard/StatCard';
import { CreateAPIKeyModal } from './modals/CreateAPIKeyModal';
import { Key, Activity, Globe, Plus, Trash2, Eye, ExternalLink, Loader2 } from 'lucide-react';
import { useToast } from '../../context/ToastContext';
import { developerService } from '../../services/developerService';
import { logger } from '@/utils/logger';

interface ApiKey {
    id: string;
    name: string;
    prefix: string;
    created: string;
    lastUsed: string;
    status: 'active' | 'revoked';
}

export const DeveloperDashboardView: React.FC = () => {
  const { addToast } = useToast();
  const [keys, setKeys] = useState<ApiKey[]>([]);
  const [loading, setLoading] = useState(true);
  const [stats, setStats] = useState<any>({});
  const [showCreateModal, setShowCreateModal] = useState(false);

  useEffect(() => {
      const fetchData = async () => {
          setLoading(true);
          try {
              const [keysData, statsData] = await Promise.all([
                  developerService.listKeys(),
                  developerService.getStats()
              ]);
              setKeys(keysData);
              setStats(statsData);
          } catch (e) {
              logger.error('Error loading developer dashboard data', {
                  error: e instanceof Error ? e.message : String(e),
                  stack: e instanceof Error ? e.stack : undefined,
              });
          } finally {
              setLoading(false);
          }
      };
      fetchData();
  }, []);

  const handleCreateKey = async (data: { name: string, scopes: string[] }) => {
      try {
          const newKey = await developerService.createKey(data);
          setKeys([newKey, ...keys]);
          addToast("API Key created successfully", "success");
      } catch (e) {
          addToast("Failed to create API key", "error");
      }
  };

  const handleRevoke = async (id: string) => {
      if (confirm('Are you sure you want to revoke this key?')) {
          await developerService.revokeKey(id);
          setKeys(keys.filter(k => k.id !== id));
          addToast("API Key revoked", "info");
      }
  };

  if (loading) return <div className="flex justify-center py-20"><Loader2 className="w-10 h-10 text-kodo-cyan animate-spin" /></div>;

  return (
    <div className="space-y-8 animate-fadeIn pb-20">
        {/* Header */}
        <div className="flex flex-col md:flex-row justify-between items-end gap-4 border-b border-kodo-steel/50 pb-6">
            <div>
                <h1 className="text-3xl font-display font-bold text-white mb-2">DEVELOPER PORTAL</h1>
                <p className="text-gray-400 font-mono text-sm">Build on top of the Veza Platform.</p>
            </div>
            <div className="flex gap-3">
                <Button variant="secondary" icon={<ExternalLink className="w-4 h-4" />} onClick={() => window.open('https://docs.veza.io', '_blank')}>Documentation</Button>
                <Button variant="primary" icon={<Plus className="w-4 h-4" />} onClick={() => setShowCreateModal(true)}>Create API Key</Button>
            </div>
        </div>

        {/* Stats */}
        <div className="grid grid-cols-1 md:grid-cols-3 gap-6">
            <StatCard label="API Requests (24h)" value={stats.requests_24h?.toLocaleString() || 0} icon={<Activity className="w-5 h-5" />} trend={5.2} color="cyan" />
            <StatCard label="Avg Latency" value={`${stats.avg_latency || 0}ms`} icon={<Globe className="w-5 h-5" />} trend={-12} color="lime" />
            <StatCard label="Active Keys" value={keys.length} icon={<Key className="w-5 h-5" />} color="gold" />
        </div>

        {/* API Keys List */}
        <Card variant="default">
            <h3 className="font-bold text-white mb-6">Active API Keys</h3>
            <div className="overflow-x-auto">
                <table className="w-full text-left">
                    <thead>
                        <tr className="text-xs text-gray-500 uppercase border-b border-kodo-steel/50">
                            <th className="pb-3 pl-4">Name</th>
                            <th className="pb-3">Key Prefix</th>
                            <th className="pb-3">Created</th>
                            <th className="pb-3">Last Used</th>
                            <th className="pb-3 text-right pr-4">Actions</th>
                        </tr>
                    </thead>
                    <tbody className="text-sm">
                        {keys.map(key => (
                            <tr key={key.id} className="border-b border-kodo-steel/20 hover:bg-white/5 transition-colors">
                                <td className="py-4 pl-4 font-bold text-white">{key.name}</td>
                                <td className="py-4 font-mono text-kodo-gold">{key.prefix}</td>
                                <td className="py-4 text-gray-400">{key.created}</td>
                                <td className="py-4 text-gray-300">{key.lastUsed}</td>
                                <td className="py-4 text-right pr-4 flex justify-end gap-2">
                                    <Button variant="ghost" size="icon" className="h-8 w-8 text-gray-400 hover:text-white" onClick={() => addToast("Full key hidden for security")}>
                                        <Eye className="w-4 h-4" />
                                    </Button>
                                    <Button variant="ghost" size="icon" className="h-8 w-8 text-kodo-red hover:bg-kodo-red/10" onClick={() => handleRevoke(key.id)}>
                                        <Trash2 className="w-4 h-4" />
                                    </Button>
                                </td>
                            </tr>
                        ))}
                        {keys.length === 0 && (
                            <tr><td colSpan={5} className="py-8 text-center text-gray-500">No active API keys. Create one to get started.</td></tr>
                        )}
                    </tbody>
                </table>
            </div>
        </Card>

        {showCreateModal && <CreateAPIKeyModal onClose={() => setShowCreateModal(false)} onCreate={handleCreateKey} />}
    </div>
  );
};