import React from 'react'
import { Bot, User } from 'lucide-react'
import EvalCard from './EvalCard.jsx'

export default function ChatMessage({ message }) {
  const { role, content, evaluation, retryResult, retryPerformed, scoreImprovement } = message

  if (role === 'user') {
    return (
      <div className="flex items-end gap-2.5 justify-end message-enter">
        <div className="max-w-[75%] bg-gradient-to-br from-brand-600 to-brand-700 text-white rounded-2xl rounded-br-sm px-4 py-3 shadow-sm">
          <p className="text-sm leading-relaxed">{content}</p>
        </div>
        <div className="w-8 h-8 rounded-full bg-brand-100 flex items-center justify-center flex-shrink-0">
          <User size={15} className="text-brand-600" />
        </div>
      </div>
    )
  }

  if (role === 'typing') {
    return (
      <div className="flex items-end gap-2.5 message-enter">
        <div className="w-8 h-8 rounded-full bg-gradient-to-br from-brand-500 to-brand-700 flex items-center justify-center flex-shrink-0 shadow-sm">
          <Bot size={15} className="text-white" />
        </div>
        <div className="bg-white border border-slate-100 rounded-2xl rounded-bl-sm px-4 py-3 shadow-sm">
          <div className="flex items-center gap-1.5">
            <span className="typing-dot"></span>
            <span className="typing-dot"></span>
            <span className="typing-dot"></span>
          </div>
        </div>
      </div>
    )
  }

  return (
    <div className="flex items-start gap-2.5 message-enter">
      <div className="w-8 h-8 rounded-full bg-gradient-to-br from-brand-500 to-brand-700 flex items-center justify-center flex-shrink-0 shadow-sm mt-1">
        <Bot size={15} className="text-white" />
      </div>
      <div className="flex-1 min-w-0 space-y-3">
        {/* Response bubble */}
        <div className="bg-white border border-slate-100 rounded-2xl rounded-tl-sm px-4 py-3 shadow-sm">
          <p className="text-sm text-slate-700 leading-relaxed">{content}</p>
        </div>

        {/* Evaluation card */}
        {evaluation && (
          <EvalCard evaluation={evaluation} />
        )}

        {/* Retry result */}
        {retryPerformed && retryResult && (
          <div className="space-y-2">
            <div className="flex items-center gap-2">
              <div className="h-px flex-1 bg-slate-200" />
              <span className="text-xs text-slate-400 font-medium px-2 bg-slate-50 rounded-full border border-slate-200">
                ↻ Auto-Retry with Optimized Prompt
              </span>
              <div className="h-px flex-1 bg-slate-200" />
            </div>

            {/* Improved response */}
            {retryResult.response && (
              <div className="bg-brand-50 border border-brand-200 rounded-2xl px-4 py-3">
                <div className="flex items-center gap-1.5 mb-2">
                  <span className="text-xs font-bold text-brand-700">Optimized Response</span>
                  <span className="text-xs bg-brand-100 text-brand-600 px-2 py-0.5 rounded-full">
                    {retryResult.prompt_version || 'optimized'} prompt
                  </span>
                </div>
                <p className="text-sm text-slate-700 leading-relaxed">{retryResult.response}</p>
              </div>
            )}

            {/* Score improvement badge */}
            {scoreImprovement !== undefined && scoreImprovement !== null && (
              <div className="flex items-center gap-2">
                <div className={`flex items-center gap-1.5 px-3 py-1.5 rounded-full text-xs font-bold ${
                  scoreImprovement > 0 ? 'bg-success-50 text-success-700 border border-success-500/20' : 'bg-slate-100 text-slate-600'
                }`}>
                  {scoreImprovement > 0 ? '↑' : '→'} Score {scoreImprovement > 0 ? '+' : ''}{Math.round(scoreImprovement * 100)}%
                </div>
              </div>
            )}

            <EvalCard evaluation={retryResult} isRetry />
          </div>
        )}
      </div>
    </div>
  )
}