'use client';

import { useState } from 'react';
import { useRouter } from 'next/navigation';
import { motion } from 'framer-motion';
import { PatentUpload } from '@/components/PatentUpload';
import { uploadPatent, executeWorkflow } from '@/lib/api';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Sparkles } from 'lucide-react';
import { toast } from 'sonner';

export default function UploadPage() {
  const router = useRouter();
  const [uploading, setUploading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const handleUpload = async (file: File) => {
    console.log('🎯 Parent handleUpload called with file:', file);

    try {
      setUploading(true);
      setError(null);

      // Step 1: Upload patent
      console.log('📤 Uploading patent:', file.name);
      toast.info('Uploading patent...', {
        description: `Uploading ${file.name}`,
      });

      console.log('🌐 Calling uploadPatent API...');
      const uploadResponse = await uploadPatent(file);
      console.log('✅ Upload response:', uploadResponse);

      toast.success('Patent uploaded successfully!', {
        description: `Patent ID: ${uploadResponse.patent_id.slice(0, 8)}...`,
      });

      // Step 2: Start workflow
      console.log('🚀 About to execute workflow for patent:', uploadResponse.patent_id);
      toast.info('Starting analysis...', {
        description: 'Initializing Patent Wake-Up workflow',
      });

      console.log('📞 Calling executeWorkflow API...');
      const workflowResponse = await executeWorkflow(uploadResponse.patent_id);
      console.log('✅ Workflow response:', workflowResponse);

      toast.success('Analysis started!', {
        description: 'Redirecting to progress page...',
      });

      // Step 3: Redirect to workflow progress page
      setTimeout(() => {
        router.push(`/workflow/${workflowResponse.workflow_id}`);
      }, 1500);
    } catch (err: any) {
      console.error('❌ Error in handleUpload:', err);
      console.error('Error details:', {
        message: err.message,
        response: err.response?.data,
        stack: err.stack
      });

      const errorMessage =
        err.response?.data?.detail || err.message || 'Failed to upload patent';
      setError(errorMessage);

      toast.error('Upload failed', {
        description: errorMessage,
        duration: 10000, // Show error for 10 seconds
      });
    } finally {
      setUploading(false);
    }
  };

  return (
    <div className="min-h-screen py-12">
      <div className="container mx-auto px-4">
        <motion.div
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ duration: 0.5 }}
          className="max-w-4xl mx-auto"
        >
          {/* Header */}
          <div className="text-center mb-12">
            <div className="flex justify-center mb-4">
              <div className="flex h-16 w-16 items-center justify-center rounded-2xl bg-gradient-to-br from-blue-600 to-purple-600">
                <Sparkles className="h-8 w-8 text-white" />
              </div>
            </div>
            <h1 className="text-4xl sm:text-5xl font-bold mb-4">
              <span className="bg-gradient-to-r from-blue-600 to-purple-600 bg-clip-text text-transparent">
                Upload Your Patent
              </span>
            </h1>
            <p className="text-xl text-gray-600 max-w-2xl mx-auto">
              Upload a patent PDF to begin the AI-powered analysis process. We'll identify
              market opportunities and match you with relevant partners.
            </p>
          </div>

          {/* Upload Component */}
          <PatentUpload onUpload={handleUpload} uploading={uploading} error={error} />

          {/* Info Cards */}
          <div className="grid md:grid-cols-3 gap-6 mt-12">
            <Card>
              <CardHeader>
                <CardTitle className="text-lg">📄 File Requirements</CardTitle>
              </CardHeader>
              <CardContent>
                <ul className="text-sm text-gray-600 space-y-2">
                  <li>• PDF format only</li>
                  <li>• Maximum 50MB</li>
                  <li>• Clear, readable text</li>
                </ul>
              </CardContent>
            </Card>

            <Card>
              <CardHeader>
                <CardTitle className="text-lg">⚡ Processing Time</CardTitle>
              </CardHeader>
              <CardContent>
                <ul className="text-sm text-gray-600 space-y-2">
                  <li>• Patent Analysis: ~30s</li>
                  <li>• Market Research: ~1min</li>
                  <li>• Partner Matching: ~2min</li>
                  <li>• Total: 2-5 minutes</li>
                </ul>
              </CardContent>
            </Card>

            <Card>
              <CardHeader>
                <CardTitle className="text-lg">🎯 What You'll Get</CardTitle>
              </CardHeader>
              <CardContent>
                <ul className="text-sm text-gray-600 space-y-2">
                  <li>• TRL Assessment</li>
                  <li>• Market Opportunities</li>
                  <li>• Partner Matches</li>
                  <li>• Valorization Brief</li>
                </ul>
              </CardContent>
            </Card>
          </div>

          {/* Features List */}
          <motion.div
            initial={{ opacity: 0, y: 20 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ duration: 0.5, delay: 0.2 }}
            className="mt-12"
          >
            <Card className="bg-gradient-to-br from-blue-50 to-purple-50 border-blue-200">
              <CardContent className="p-8">
                <h3 className="text-xl font-semibold mb-4 text-center">
                  🤖 Powered by Multi-Agent AI System
                </h3>
                <div className="grid sm:grid-cols-2 gap-4 text-sm text-gray-700">
                  <div className="flex items-start space-x-2">
                    <span className="text-blue-600">✓</span>
                    <span>PlannerAgent orchestrates the workflow</span>
                  </div>
                  <div className="flex items-start space-x-2">
                    <span className="text-blue-600">✓</span>
                    <span>CriticAgent ensures quality</span>
                  </div>
                  <div className="flex items-start space-x-2">
                    <span className="text-purple-600">✓</span>
                    <span>DocumentAnalysisAgent extracts innovations</span>
                  </div>
                  <div className="flex items-start space-x-2">
                    <span className="text-purple-600">✓</span>
                    <span>MarketAnalysisAgent finds opportunities</span>
                  </div>
                  <div className="flex items-start space-x-2">
                    <span className="text-green-600">✓</span>
                    <span>MatchmakingAgent finds partners</span>
                  </div>
                  <div className="flex items-start space-x-2">
                    <span className="text-green-600">✓</span>
                    <span>OutreachAgent generates brief</span>
                  </div>
                </div>
              </CardContent>
            </Card>
          </motion.div>
        </motion.div>
      </div>
    </div>
  );
}