import React, { useState, useEffect } from 'react';
import { AnalysisResult, Message } from '../types';
import { ClipboardCheck, X, CheckCircle2, AlertTriangle, Lightbulb, TrendingUp, Download, Copy, Check, FileText } from 'lucide-react';
import { Button } from './ui/button';
import { formatSessionAsMarkdown, downloadFile } from '../services/sessionStorage';

interface SessionReportProps {
  analysis: AnalysisResult;
  scenarioTitle?: string;
  messages?: Message[];
  onExit: () => void;
}

const SessionReport: React.FC<SessionReportProps> = ({ 
  analysis, 
  scenarioTitle = "CBT Roleplay Session", 
  messages = [], 
  onExit 
}) => {
  const [copied, setCopied] = useState(false);

  const handleCopyReframe = () => {
    navigator.clipboard.writeText(analysis.suggestions.alternativeThought);
    setCopied(true);
    setTimeout(() => setCopied(false), 2000);
  };

  const handleExportMarkdown = () => {
    const md = formatSessionAsMarkdown(scenarioTitle, analysis, messages);
    const fileName = `cbt-report-${scenarioTitle.toLowerCase().replace(/\s+/g, '-')}-${Date.now()}.md`;
    downloadFile(md, fileName, 'text/markdown');
  };

  const handleExportJSON = () => {
    const json = JSON.stringify({ scenarioTitle, analysis, messages, exportedAt: new Date().toISOString() }, null, 2);
    const fileName = `cbt-report-${scenarioTitle.toLowerCase().replace(/\s+/g, '-')}-${Date.now()}.json`;
    downloadFile(json, fileName, 'application/json');
  };

  return (
    <div className="flex flex-col h-full bg-[#FDFDFF] rounded-3xl border border-slate-200 overflow-hidden shadow-2xl animate-in zoom-in-95 duration-500 w-full max-w-4xl mx-auto">
      <div className="bg-teal-600 p-6 flex justify-between items-center text-white">
        <div className="flex items-center gap-3">
           <ClipboardCheck size={28} />
           <div>
             <h2 className="text-xl font-bold leading-none">Session Summary Report</h2>
             <span className="text-[10px] font-bold uppercase tracking-widest text-teal-100 opacity-80">
               {scenarioTitle} • Clinical Evaluation Complete
             </span>
           </div>
        </div>
        <div className="flex items-center gap-2">
          <Button
            variant="ghost"
            size="sm"
            onClick={handleExportMarkdown}
            className="text-white hover:bg-white/20 rounded-xl text-xs flex items-center gap-1.5"
            title="Download Markdown Report"
          >
            <FileText size={16} />
            <span className="hidden sm:inline">Export MD</span>
          </Button>
          <Button
            variant="ghost"
            size="sm"
            onClick={handleExportJSON}
            className="text-white hover:bg-white/20 rounded-xl text-xs flex items-center gap-1.5"
            title="Download JSON Report"
          >
            <Download size={16} />
            <span className="hidden sm:inline">JSON</span>
          </Button>
          <button onClick={onExit} className="bg-white/10 hover:bg-white/20 p-2 rounded-xl border border-white/10 transition-colors ml-1">
            <X size={20} />
          </button>
        </div>
      </div>

      <div className="flex-grow overflow-y-auto p-8 flex flex-col gap-6">
        <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
          <div className={`p-6 rounded-2xl border-l-8 ${analysis.analysis.isAdaptive ? 'bg-teal-50/50 border-teal-500' : 'bg-rose-50/50 border-rose-500'}`}>
             <div className="flex items-center gap-2 mb-4">
                {analysis.analysis.isAdaptive ? <CheckCircle2 className="text-teal-600" /> : <AlertTriangle className="text-rose-600" />}
                <span className="font-black text-xs uppercase tracking-widest">{analysis.analysis.isAdaptive ? 'Adaptive Growth Observed' : 'Clinical Patterns Detected'}</span>
             </div>
             {analysis.analysis.distortions.length > 0 && (
               <div className="flex flex-wrap gap-2 mb-4">
                  {analysis.analysis.distortions.map(d => (
                    <span key={d} className="bg-white border border-slate-200 px-3 py-1 rounded-lg text-[10px] font-bold text-slate-600 shadow-sm">{d}</span>
                  ))}
               </div>
             )}
             <p className="text-sm leading-relaxed text-slate-700 font-medium italic">"{analysis.analysis.evidence}"</p>
          </div>

          <div className="bg-white p-6 rounded-2xl border border-slate-100 shadow-sm flex flex-col justify-center">
             <div className="flex justify-between items-center mb-4">
                <span className="text-[10px] font-black text-slate-400 uppercase tracking-widest">Mastery Level</span>
                <div className="flex gap-1.5">
                  {[1,2,3,4,5].map(s => (
                    <div key={s} className={`h-2 w-8 rounded-full ${s <= analysis.rating.score ? 'bg-teal-500' : 'bg-slate-100'}`} />
                  ))}
                </div>
             </div>
             <p className="text-sm text-slate-600 leading-relaxed font-light">{analysis.rating.reason}</p>
          </div>
        </div>

        <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
          <div className="bg-white p-6 rounded-2xl border border-teal-100 shadow-sm relative group">
             <div className="flex items-center justify-between mb-3">
                <div className="flex items-center gap-2 text-teal-600">
                  <Lightbulb size={20} />
                  <span className="text-[10px] font-black uppercase tracking-widest">Master Reframe</span>
                </div>
                <Button
                  variant="ghost"
                  size="sm"
                  onClick={handleCopyReframe}
                  className="h-7 px-2 text-[10px] text-slate-400 hover:text-teal-700 flex items-center gap-1"
                >
                  {copied ? <Check size={12} className="text-teal-600" /> : <Copy size={12} />}
                  {copied ? 'Copied' : 'Copy'}
                </Button>
             </div>
             <p className="text-base text-slate-800 italic font-medium leading-relaxed">"{analysis.suggestions.alternativeThought}"</p>
          </div>
          <div className="bg-white p-6 rounded-2xl border border-teal-100 shadow-sm">
             <div className="flex items-center gap-2 text-teal-600 mb-3">
                <TrendingUp size={20} />
                <span className="text-[10px] font-black uppercase tracking-widest">Homework & Next Steps</span>
             </div>
             <p className="text-sm text-slate-700 leading-relaxed">{analysis.suggestions.behavioralStep}</p>
          </div>
        </div>
      </div>

      <div className="p-6 bg-slate-50 border-t border-slate-100 flex justify-center">
         <button 
           onClick={onExit}
           className="bg-teal-600 text-white px-12 py-3 rounded-xl font-bold hover:bg-teal-700 shadow-lg shadow-teal-100 transition-all uppercase tracking-widest text-xs"
         >
           Close Report & Return
         </button>
      </div>
    </div>
  );
};

export default React.memo(SessionReport);