
import { useState } from "react";
import { useQuery, useQueryClient } from "@tanstack/react-query";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { RefreshCw, AlertCircle, Radar } from "lucide-react";
import { SignatureListItem } from "@/components/SignatureListItem";
import { toast } from "@/hooks/use-toast";
import { Signature } from "@/lib/types";

interface ApiResponse {
  items: Signature[];
}

interface SystemTrackerProps {
  system: string;
}

export const SystemTracker = ({ system }: SystemTrackerProps) => {
  const {
    data: signaturesData,
    refetch: refetchSignatures,
    isLoading: signaturesLoading,
    error: signaturesError
  } = useQuery({
    queryKey: ['signatures', system],
    queryFn: async () => {
      if (!system) return null;

      const encodedSystem = encodeURIComponent(system);
      const url = `https://evebase.site.quack-lab.dev/api/collections/sigview/records?filter=(system%3D'${encodedSystem}')`;

      console.log('Fetching signatures for system:', system);
      console.log('API URL:', url);

      const response = await fetch(url);
      if (!response.ok) {
        throw new Error('Failed to fetch signatures');
      }
      const data: ApiResponse = await response.json();
      return data;
    },
    enabled: !!system,
    refetchInterval: 5000, // Poll every 5 seconds
  });

  const handleRefresh = () => {
    refetchSignatures();
    toast({
      title: "Refreshing Data",
      description: "Updating signature information...",
    });
  };

  const signatures = signaturesData?.items || [];
  const isLoading = signaturesLoading;

  // Sort signatures by date (newest first) and prioritize unknown types
  const sortedSignatures = [...signatures].sort((a, b) => {
    // First, prioritize unknown types
    const aIsUnknown = !a.type || a.type === '';
    const bIsUnknown = !b.type || b.type === '';
    if (aIsUnknown && !bIsUnknown) return -1;
    if (!aIsUnknown && bIsUnknown) return 1;

    // If both are unknown or both are known, sort by type
    if (a.type !== b.type) {
      return a.type.localeCompare(b.type);
    }

    // If same type, sort by date
    const dateA = a.updated || a.created || '';
    const dateB = b.updated || b.created || '';
    return dateB.localeCompare(dateA);
  });

  return (
    <div className="space-y-6">
      {/* System Status Card */}
      <Card className="bg-slate-800/50 border-slate-700">
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-4">
          <CardTitle className="text-xl text-white flex items-center gap-2">
            <Radar className="h-5 w-5 text-blue-400" />
            {system}
            <Badge variant="outline" className="ml-2 bg-blue-900/20 text-blue-400 border-blue-600">
              Polling
            </Badge>
          </CardTitle>
          <Button
            onClick={handleRefresh}
            disabled={isLoading}
            variant="outline"
            size="sm"
            className="bg-slate-700 border-slate-600 text-slate-200 hover:bg-slate-600"
          >
            <RefreshCw className={`h-4 w-4 mr-2 ${isLoading ? 'animate-spin' : ''}`} />
            Refresh
          </Button>
        </CardHeader>
      </Card>

      {/* Error Display */}
      {signaturesError && (
        <Card className="bg-red-900/20 border-red-700">
          <CardContent className="pt-6">
            <div className="flex items-center gap-2 text-red-400">
              <AlertCircle className="h-5 w-5" />
              <span>Error loading signatures: {signaturesError.message}</span>
            </div>
          </CardContent>
        </Card>
      )}

      {/* Signatures Display */}
      {system && !signaturesLoading && (
        <div className="space-y-4">
          {sortedSignatures.length === 0 ? (
            <Card className="bg-slate-800/30 border-slate-700">
              <CardContent className="pt-6 text-center">
                <div className="text-slate-400">No signatures found for {system}</div>
              </CardContent>
            </Card>
          ) : (
            <Card className="bg-slate-800/30 border-slate-700">
              <CardHeader>
                <CardTitle className="text-white flex items-center justify-between">
                  <span>Signatures</span>
                  <Badge variant="outline" className="bg-slate-700 text-slate-200 border-slate-600">
                    {sortedSignatures.length} Total
                  </Badge>
                </CardTitle>
              </CardHeader>
              <CardContent className="p-0">
                <div className="divide-y divide-slate-700">
                  {sortedSignatures.map((signature) => (
                    <SignatureListItem key={signature.id} signature={signature} />
                  ))}
                </div>
              </CardContent>
            </Card>
          )}
        </div>
      )}

      {/* Loading State */}
      {signaturesLoading && system && (
        <Card className="bg-slate-800/30 border-slate-700">
          <CardContent className="pt-6">
            <div className="space-y-4">
              {[...Array(6)].map((_, i) => (
                <div key={i} className="flex items-center gap-4 p-4 animate-pulse">
                  <div className="h-6 bg-slate-700 rounded w-24"></div>
                  <div className="h-4 bg-slate-600 rounded flex-1"></div>
                  <div className="h-4 bg-slate-700 rounded w-16"></div>
                </div>
              ))}
            </div>
          </CardContent>
        </Card>
      )}
    </div>
  );
};
