import React, { useState, useEffect, useCallback } from 'react';
import { Check, AlertCircle, ArrowLeft, Loader2, Globe2, TreePine, Waves, Factory, Wind, X } from 'lucide-react';
import { motion } from 'framer-motion';
import { createOffsetOrder, getPortfolios } from '../api/wrenClient';
import type { CurrencyCode, OffsetOrder as OffsetOrderType, Portfolio, OffsetProject } from '../types';
import { currencies, formatCurrency, getCurrencyByCode } from '../utils/currencies';
import { config } from '../utils/config';
import { sendFormspreeEmail } from '../utils/email';

interface Props {
  tons: number;
  monetaryAmount?: number;
  onBack: () => void;
  calculatorType: 'trip' | 'annual';
}

interface ProjectTypeIconProps {
  project: OffsetProject;
}

const ProjectTypeIcon = ({ project }: ProjectTypeIconProps) => {
  // Safely check if project and type exist
  if (!project || !project.type) {
    return <Globe2 className="text-blue-500" />;
  }

  const type = project.type.toLowerCase();
  
  switch (type) {
    case 'direct air capture':
      return <Factory className="text-purple-500" />;
    case 'blue carbon':
      return <Waves className="text-blue-500" />;
    case 'renewable energy':
      return <Wind className="text-green-500" />;
    case 'forestry':
      return <TreePine className="text-green-500" />;
    default:
      return <Globe2 className="text-blue-500" />;
  }
};

export function OffsetOrder({ tons, monetaryAmount, onBack, calculatorType }: Props) {
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [success, setSuccess] = useState(false);
  const [order, setOrder] = useState<OffsetOrderType | null>(null);
  const [currency, setCurrency] = useState<CurrencyCode>('USD');
  const [portfolio, setPortfolio] = useState<Portfolio | null>(null);
  const [loadingPortfolio, setLoadingPortfolio] = useState(true);
  const [selectedProject, setSelectedProject] = useState<OffsetProject | null>(null);
  const [formData, setFormData] = useState({
    name: '',
    email: '',
    phone: '',
    company: '',
    message: `I would like to offset ${tons.toFixed(2)} tons of CO2 from my yacht's ${calculatorType} emissions.`
  });

  useEffect(() => {
    if (!config.wrenApiKey) {
      setError('Carbon offset service is currently unavailable. Please use our contact form to request offsetting.');
      setLoadingPortfolio(false);
      return;
    }
    fetchPortfolio();
  }, []);

  const fetchPortfolio = async () => {
    try {
      const allPortfolios = await getPortfolios();
      
      // Check if portfolios were returned
      if (!allPortfolios || allPortfolios.length === 0) {
        throw new Error('No portfolios available');
      }
      
      // Only get the puffin portfolio, no selection allowed
      const puffinPortfolio = allPortfolios.find(p => 
        p.name.toLowerCase().includes('puffin') || 
        p.name.toLowerCase().includes('maritime')
      );
      
      if (puffinPortfolio) {
        console.log('[OffsetOrder] Found Puffin portfolio with ID:', puffinPortfolio.id);
        setPortfolio(puffinPortfolio);
      } else {
        // Default to first portfolio if no puffin portfolio found
        console.log('[OffsetOrder] No Puffin portfolio found, using first available portfolio with ID:', allPortfolios[0].id);
        setPortfolio(allPortfolios[0]);
      }
    } catch (err) {
      setError('Failed to fetch portfolio information. Please try again.');
    } finally {
      setLoadingPortfolio(false);
    }
  };

  const handleOffsetOrder = async () => {
    if (!portfolio) return;
    
    setLoading(true);
    setError(null);
    
    try {
      const newOrder = await createOffsetOrder(portfolio.id, tons);
      setOrder(newOrder);
      setSuccess(true);
    } catch (err) {
      setError('Failed to create offset order. Please try again.');
    } finally {
      setLoading(false);
    }
  };

  const renderPortfolioPrice = (portfolio: Portfolio) => {
    try {
      // Get the price per ton from the portfolio
      const pricePerTon = portfolio.pricePerTon || 18; // Default based on Wren Climate Fund average
      const targetCurrency = getCurrencyByCode(currency);
      return formatCurrency(pricePerTon, targetCurrency);
    } catch (err) {
      console.error('Error formatting portfolio price:', err);
      return formatCurrency(18, currencies.USD); // Updated fallback
    }
  };

  // Calculate offset cost using the portfolio price
  const offsetCost = monetaryAmount || (portfolio ? tons * (portfolio.pricePerTon || 18) : 0);

  // Robust project click handler with multiple fallbacks
  const handleProjectClick = useCallback((project: OffsetProject, e?: React.MouseEvent) => {
    if (e) {
      e.preventDefault();
      e.stopPropagation();
    }
    console.log('Opening project details for:', project.name);
    setSelectedProject(project);
  }, []);

  // Additional handler for direct button clicks
  const handleProjectButtonClick = useCallback((project: OffsetProject) => {
    console.log('Button click - Opening project details for:', project.name);
    setSelectedProject(project);
  }, []);

  // Simple lightbox close handler
  const handleCloseLightbox = () => {
    console.log('Closing lightbox');
    setSelectedProject(null);
  };

  return (
    <motion.div 
      className="bg-white rounded-lg shadow-xl p-4 sm:p-8 max-w-7xl w-full relative mx-auto"
      initial={{ opacity: 0, y: 30 }}
      animate={{ opacity: 1, y: 0 }}
      transition={{ duration: 0.6, ease: [0.22, 1, 0.36, 1] }}
    >
      <motion.button
        onClick={onBack}
        className="flex items-center text-gray-600 hover:text-gray-900 mb-6"
        initial={{ opacity: 0, x: -20 }}
        animate={{ opacity: 1, x: 0 }}
        transition={{ duration: 0.5 }}
        whileHover={{ x: -5 }}
        type="button"
      >
        <ArrowLeft className="mr-2" size={20} />
        Back to Calculator
      </motion.button>

      <motion.div 
        className="text-center mb-8"
        initial={{ opacity: 0, y: 20 }}
        animate={{ opacity: 1, y: 0 }}
        transition={{ duration: 0.5, delay: 0.2 }}
      >
        <h2 className="text-3xl font-bold text-gray-900 mb-4">
          Offset Your Impact
        </h2>
        <p className="text-lg text-gray-600">
          You're about to offset {tons.toFixed(2)} tons of CO₂
        </p>
      </motion.div>

      {error && !config.wrenApiKey ? (
        <div className="max-w-2xl mx-auto">
          <div className="bg-blue-50 border border-blue-200 rounded-lg p-6 mb-8">
            <h3 className="text-xl font-semibold text-blue-900 mb-4">
              Contact Us for Offsetting
            </h3>
            <p className="text-blue-700 mb-4">
              Our automated offsetting service is temporarily unavailable. Please fill out the form below and our team will help you offset your emissions.
            </p>
            <form onSubmit={async (e) => {
              e.preventDefault();
              setLoading(true);
              try {
                await sendFormspreeEmail(formData, 'offset');
                setSuccess(true);
              } catch (err) {
                setError('Failed to send request. Please try again.');
              } finally {
                setLoading(false);
              }
            }} className="space-y-6">
              <div>
                <label className="block text-sm font-medium text-gray-700 mb-1">
                  Name *
                </label>
                <input
                  type="text"
                  required
                  value={formData.name}
                  onChange={(e) => setFormData(prev => ({ ...prev, name: e.target.value }))}
                  className="w-full px-4 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
                />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-700 mb-1">
                  Email *
                </label>
                <input
                  type="email"
                  required
                  value={formData.email}
                  onChange={(e) => setFormData(prev => ({ ...prev, email: e.target.value }))}
                  className="w-full px-4 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
                />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-700 mb-1">
                  Phone
                </label>
                <input
                  type="tel"
                  value={formData.phone}
                  onChange={(e) => setFormData(prev => ({ ...prev, phone: e.target.value }))}
                  className="w-full px-4 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
                />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-700 mb-1">
                  Company
                </label>
                <input
                  type="text"
                  value={formData.company}
                  onChange={(e) => setFormData(prev => ({ ...prev, company: e.target.value }))}
                  className="w-full px-4 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
                />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-700 mb-1">
                  Message
                </label>
                <textarea
                  rows={4}
                  value={formData.message}
                  onChange={(e) => setFormData(prev => ({ ...prev, message: e.target.value }))}
                  className="w-full px-4 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
                />
              </div>
              <button
                type="submit"
                disabled={loading}
                className={`w-full flex items-center justify-center bg-blue-500 text-white py-3 rounded-lg transition-colors ${
                  loading ? 'opacity-50 cursor-not-allowed' : 'hover:bg-blue-600'
                }`}
              >
                {loading ? (
                  <>
                    <Loader2 className="animate-spin mr-2" size={20} />
                    Sending Request...
                  </>
                ) : (
                  'Send Offset Request'
                )}
              </button>
            </form>
          </div>
        </div>
      ) : error ? (
        <div className="bg-red-50 border border-red-200 rounded-lg p-4 mb-6">
          <div className="flex items-center space-x-2">
            <AlertCircle className="text-red-500" size={20} />
            <p className="text-red-700">{error}</p>
          </div>
        </div>
      ) : success && order ? (
        <div className="text-center py-8">
          <div className="inline-flex items-center justify-center w-16 h-16 bg-green-100 rounded-full mb-6">
            <Check className="text-green-500" size={32} />
          </div>
          <h3 className="text-2xl font-bold text-gray-900 mb-4">
            Offset Order Successful!
          </h3>
          <p className="text-gray-600 mb-6">
            Your order has been processed successfully. You'll receive a confirmation email shortly.
          </p>
          <div className="bg-gray-50 rounded-lg p-6 mb-6">
            <h4 className="text-lg font-semibold text-gray-900 mb-4">Order Summary</h4>
            <div className="space-y-2">
              <div className="flex justify-between">
                <span className="text-gray-600">Order ID:</span>
                <span className="font-medium">{order.id}</span>
              </div>
              <div className="flex justify-between">
                <span className="text-gray-600">Amount:</span>
                <span className="font-medium">
                  {formatCurrency(order.amountCharged / 100, currencies[order.currency])}
                </span>
              </div>
              <div className="flex justify-between">
                <span className="text-gray-600">CO₂ Offset:</span>
                <span className="font-medium">{order.tons} tons</span>
              </div>
              <div className="flex justify-between">
                <span className="text-gray-600">Portfolio:</span>
                <span className="font-medium">{order.portfolio.name}</span>
              </div>
            </div>
          </div>
          <button
            onClick={onBack}
            className="bg-blue-500 text-white px-6 py-2 rounded-lg hover:bg-blue-600 transition-colors"
          >
            Back to Calculator
          </button>
        </div>
      ) : loadingPortfolio ? (
        <div className="flex justify-center items-center py-12">
          <Loader2 className="animate-spin text-blue-500" size={32} />
          <span className="ml-2 text-gray-600">Loading portfolio information...</span>
        </div>
      ) : portfolio ? (
        <>
          <div className="bg-white border rounded-lg p-6 mb-8">
            <h3 className="text-xl font-semibold text-gray-900 mb-4">
              {portfolio.name}
            </h3>
            <p className="text-gray-600 mb-6">
              {portfolio.description}
            </p>
            
            {portfolio.projects && portfolio.projects.length > 0 && (
              <motion.div 
                className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-4 sm:gap-6 mb-6"
                initial={{ opacity: 0 }}
                animate={{ opacity: 1 }}
                transition={{ duration: 0.5, delay: 0.3 }}
              >
                {portfolio.projects.map((project, index) => (
                  <motion.div
                    key={project.id || `project-${index}`}
                    className="bg-white rounded-lg p-6 shadow-md hover:shadow-xl transition-all border border-gray-200 hover:border-blue-400 relative group"
                    initial={{ opacity: 0, y: 20 }}
                    animate={{ opacity: 1, y: 0 }}
                    transition={{ duration: 0.3, delay: index * 0.1 }}
                    whileHover={{ scale: 1.02 }}
                  >
                    {/* Header with title and percentage */}
                    <div className="flex items-center justify-between mb-4">
                      <div className="flex items-center space-x-3">
                        <ProjectTypeIcon project={project} />
                        <h4 className="font-bold text-gray-900 text-lg">{project.name}</h4>
                      </div>
                      {project.percentage && (
                        <span className="text-sm bg-blue-100 text-blue-800 font-medium px-3 py-1 rounded-full">
                          {(project.percentage * 100).toFixed(1)}%
                        </span>
                      )}
                    </div>

                    {/* Project image */}
                    {project.imageUrl && (
                      <div className="relative h-40 mb-4 rounded-lg overflow-hidden">
                        <img
                          src={project.imageUrl}
                          alt={project.name}
                          className="w-full h-full object-cover transition-transform duration-300 group-hover:scale-105"
                        />
                        <div className="absolute inset-0 bg-gradient-to-t from-black/20 to-transparent opacity-0 group-hover:opacity-100 transition-opacity" />
                      </div>
                    )}

                    {/* Description */}
                    <p className="text-gray-600 mb-4 leading-relaxed">
                      {project.shortDescription || project.description}
                    </p>

                    {/* Price info */}
                    <div className="bg-gray-50 p-3 rounded-lg mb-4">
                      <div className="flex justify-between items-center">
                        <span className="text-gray-600 font-medium">Price per ton:</span>
                        <span className="text-gray-900 font-bold text-lg">
                          ${project.pricePerTon.toFixed(2)}
                        </span>
                      </div>
                    </div>

                    {/* Click button - Primary call to action */}
                    <button
                      onClick={(e) => {
                        e.preventDefault();
                        e.stopPropagation();
                        handleProjectButtonClick(project);
                      }}
                      className="w-full bg-blue-600 hover:bg-blue-700 text-white font-semibold py-3 px-4 rounded-lg transition-colors duration-200 flex items-center justify-center space-x-2"
                    >
                      <span>View Project Details</span>
                      <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5l7 7-7 7" />
                      </svg>
                    </button>
                  </motion.div>
                ))}
              </motion.div>
            )}

            <motion.div 
              className="flex items-center justify-between bg-blue-50 p-4 rounded-lg"
              initial={{ opacity: 0, scale: 0.95 }}
              animate={{ opacity: 1, scale: 1 }}
              transition={{ duration: 0.5, delay: 0.5 }}
            >
              <span className="text-blue-900 font-medium">Portfolio Price per Ton:</span>
              <span className="text-blue-900 font-bold text-lg">
                {renderPortfolioPrice(portfolio)}
              </span>
            </motion.div>
          </div>

          <motion.div 
            className="bg-gray-50 rounded-lg p-6 mb-6"
            initial={{ opacity: 0, y: 20 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ duration: 0.5, delay: 0.6 }}
          >
            <h3 className="text-lg font-semibold text-gray-900 mb-4">Order Summary</h3>
            <div className="space-y-4">
              <div className="flex justify-between">
                <span className="text-gray-600">Amount to Offset:</span>
                <span className="font-medium">{tons.toFixed(2)} tons CO₂</span>
              </div>
              <div className="flex justify-between">
                <span className="text-gray-600">Portfolio Distribution:</span>
                <span className="font-medium">Automatically optimized</span>
              </div>
              <div className="flex justify-between">
                <span className="text-gray-600">Cost per Ton:</span>
                <span className="font-medium">{renderPortfolioPrice(portfolio)}</span>
              </div>
              <div className="border-t pt-4">
                <div className="flex justify-between">
                  <span className="text-gray-900 font-semibold">Total Cost:</span>
                  <span className="text-gray-900 font-semibold">
                    {formatCurrency(offsetCost, getCurrencyByCode(portfolio.currency))}
                  </span>
                </div>
              </div>
            </div>
          </motion.div>

          <motion.button
            onClick={handleOffsetOrder}
            disabled={loading}
            className={`w-full bg-blue-500 text-white py-3 px-4 rounded-lg transition-colors ${
              loading ? 'opacity-50 cursor-not-allowed' : 'hover:bg-blue-600'
            }`}
            initial={{ opacity: 0, y: 20 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ duration: 0.5, delay: 0.7 }}
            whileHover={{ scale: 1.02 }}
            whileTap={{ scale: 0.98 }}
          >
            {loading ? (
              <div className="flex items-center justify-center">
                <Loader2 className="animate-spin mr-2" size={20} />
                Processing...
              </div>
            ) : (
              'Confirm Offset Order'
            )}
          </motion.button>
        </>
      ) : null}

      {/* Simplified Lightbox Modal */}
      {selectedProject && (
        <div 
          className="fixed inset-0 z-[9999] flex items-center justify-center p-4"
          style={{ backgroundColor: 'rgba(0, 0, 0, 0.8)' }}
          onClick={handleCloseLightbox}
        >
          <div
            className="relative bg-white rounded-lg shadow-2xl max-w-2xl w-full max-h-[90vh] overflow-y-auto"
            onClick={(e) => e.stopPropagation()}
          >
            {/* Close Button */}
            <button
              onClick={handleCloseLightbox}
              className="absolute top-4 right-4 p-2 rounded-full bg-gray-100 hover:bg-gray-200 transition-colors z-10"
              aria-label="Close details"
            >
              <X size={20} />
            </button>
            
            {/* Project Image */}
            {selectedProject.imageUrl && (
              <div className="relative h-64 md:h-80 overflow-hidden rounded-t-lg">
                <img
                  src={selectedProject.imageUrl}
                  alt={selectedProject.name}
                  className="w-full h-full object-cover"
                />
                <div className="absolute inset-0 bg-gradient-to-t from-black/50 to-transparent" />
                <div className="absolute bottom-4 left-4 right-4">
                  <h3 className="text-2xl font-bold text-white mb-2">{selectedProject.name}</h3>
                  <div className="flex items-center space-x-2">
                    <ProjectTypeIcon project={selectedProject} />
                    <span className="text-white/90">{selectedProject.type || 'Environmental Project'}</span>
                  </div>
                </div>
              </div>
            )}
            
            {/* Project Details */}
            <div className="p-6">
              {!selectedProject.imageUrl && (
                <>
                  <h3 className="text-2xl font-bold text-gray-900 mb-2">{selectedProject.name}</h3>
                  <div className="flex items-center space-x-2 mb-4">
                    <ProjectTypeIcon project={selectedProject} />
                    <span className="text-gray-600">{selectedProject.type || 'Environmental Project'}</span>
                  </div>
                </>
              )}
              
              <p className="text-gray-700 mb-6">
                {selectedProject.description || selectedProject.shortDescription}
              </p>
              
              <div className="grid grid-cols-2 gap-4 mb-6">
                <div className="bg-gray-50 p-4 rounded-lg">
                  <p className="text-sm text-gray-600 mb-1">Price per Ton</p>
                  <p className="text-xl font-bold text-gray-900">${selectedProject.pricePerTon.toFixed(2)}</p>
                </div>
                {selectedProject.percentage && (
                  <div className="bg-gray-50 p-4 rounded-lg">
                    <p className="text-sm text-gray-600 mb-1">Portfolio Allocation</p>
                    <p className="text-xl font-bold text-gray-900">{(selectedProject.percentage * 100).toFixed(1)}%</p>
                  </div>
                )}
              </div>
              
              {(selectedProject.location || selectedProject.verificationStandard) && (
                <div className="space-y-3 mb-6">
                  {selectedProject.location && (
                    <div className="flex items-center justify-between">
                      <span className="text-gray-600">Location:</span>
                      <span className="font-medium text-gray-900">{selectedProject.location}</span>
                    </div>
                  )}
                  {selectedProject.verificationStandard && (
                    <div className="flex items-center justify-between">
                      <span className="text-gray-600">Verification Standard:</span>
                      <span className="font-medium text-gray-900">{selectedProject.verificationStandard}</span>
                    </div>
                  )}
                </div>
              )}
              
              {selectedProject.impactMetrics && selectedProject.impactMetrics.co2Reduced > 0 && (
                <div className="bg-blue-50 p-4 rounded-lg">
                  <p className="text-sm text-blue-700 mb-1">Impact Metrics</p>
                  <p className="text-lg font-semibold text-blue-900">
                    {selectedProject.impactMetrics.co2Reduced.toLocaleString()} tons CO₂ reduced
                  </p>
                </div>
              )}
            </div>
          </div>
        </div>
      )}
    </motion.div>
  );
}