import React, { useEffect, useState } from 'react';
import { motion, useSpring, useTransform } from 'framer-motion';
import { Check, X, Flame, ChevronRight } from 'lucide-react';
import { AnswerOption, Player, GameRole } from '../types';
import { SHAPES, COLORS } from '../constants';
import confetti from 'canvas-confetti';

const AnimatedCounter: React.FC<{ from: number; to: number }> = ({ from, to }) => {
  const springValue = useSpring(from, { 
    stiffness: 50, 
    damping: 20,
  });
  const [displayValue, setDisplayValue] = useState(from);
  
  useEffect(() => {
    springValue.set(to);
  }, [to, springValue]);
  
  useEffect(() => {
    const unsubscribe = springValue.on('change', (latest) => {
      setDisplayValue(Math.round(Number(latest)));
    });
    return unsubscribe;
  }, [springValue]);
  
  return <span>{displayValue}</span>;
};

interface RevealScreenProps {
  isCorrect: boolean;
  pointsEarned: number;
  newScore: number;
  streak: number;
  correctOption: AnswerOption;
  selectedOption?: AnswerOption | null;
  role: GameRole;
  onNext?: () => void;
  isPresenter?: boolean;
  onPresenterAdvance?: () => void;
  hostParticipates?: boolean;
}

export const RevealScreen: React.FC<RevealScreenProps> = ({
  isCorrect,
  pointsEarned,
  newScore,
  streak,
  correctOption,
  selectedOption,
  role,
  onNext,
  isPresenter = false,
  onPresenterAdvance,
  hostParticipates = false
}) => {
  const isHost = role === 'HOST';
  const canAdvance = isHost || isPresenter;
  // When host is participating, show client-style feedback view instead of presentation view
  const showPlayerFeedback = !isHost || hostParticipates;

  // Trigger confetti for correct answers
  useEffect(() => {
    if (isCorrect && !isHost) {
      confetti({
        particleCount: 100,
        spread: 70,
        origin: { y: 0.6 },
        colors: ['#22c55e', '#ffffff', '#fbbf24']
      });
    }
  }, [isCorrect, isHost]);

  // Host spectating (not participating) - show presentation view with big answer card
  if (isHost && !hostParticipates) {
    const ShapeIcon = SHAPES[correctOption.shape];
    const colorClass = COLORS[correctOption.color];

    return (
      <div className="flex flex-col items-center justify-center h-screen bg-gray-900 text-white p-4 md:p-8 relative overflow-hidden">
        <div className="absolute inset-0 bg-[url('https://www.transparenttextures.com/patterns/cubes.png')] opacity-10 pointer-events-none"></div>
        
        <motion.div 
            initial={{ opacity: 0, y: -50 }}
            animate={{ opacity: 1, y: 0 }}
            className="text-lg md:text-4xl font-bold uppercase tracking-widest mb-4 md:mb-12 opacity-80 relative z-10"
        >
            The correct answer is
        </motion.div>

        <motion.div
            initial={{ scale: 0, rotate: -10 }}
            animate={{ scale: 1, rotate: 0 }}
            transition={{ type: "spring", bounce: 0.5 }}
            className={`${colorClass} p-6 md:p-12 rounded-2xl md:rounded-[3rem] shadow-[0_10px_0_rgba(0,0,0,0.3)] md:shadow-[0_20px_0_rgba(0,0,0,0.3)] flex flex-col items-center max-w-4xl w-full border-4 md:border-8 border-white/20 relative z-10`}
        >
             <div className="bg-black/20 p-3 md:p-6 rounded-full mb-3 md:mb-6">
                <ShapeIcon className="w-10 h-10 md:w-20 md:h-20" fill="currentColor" />
             </div>
             <h1 className="text-3xl md:text-7xl font-black font-display text-center drop-shadow-md leading-tight">
                {correctOption.text}
             </h1>
             {correctOption.reason && (
               <motion.p 
                 initial={{ opacity: 0 }}
                 animate={{ opacity: 1 }}
                 transition={{ delay: 0.3 }}
                 className="mt-3 md:mt-6 text-base md:text-2xl text-center opacity-90 bg-black/20 px-4 md:px-6 py-2 md:py-4 rounded-xl md:rounded-2xl max-w-2xl"
               >
                 {correctOption.reason}
               </motion.p>
             )}
        </motion.div>

        {onNext && (
          <motion.button
            initial={{ opacity: 0, y: 20 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ delay: 0.5 }}
            onClick={onNext}
            className="mt-6 md:mt-12 bg-white text-gray-900 px-6 md:px-8 py-3 md:py-4 rounded-xl md:rounded-2xl text-base md:text-xl font-black shadow-[0_6px_0_rgba(0,0,0,0.3)] active:shadow-none active:translate-y-[6px] transition-all flex items-center gap-2 hover:bg-gray-100 relative z-10 cursor-pointer"
          >
            Continue to Scoreboard
            <ChevronRight className="w-5 h-5 md:w-7 md:h-7" strokeWidth={3} />
          </motion.button>
        )}
      </div>
    );
  }

  // -- CLIENT VIEW --
  const bgColor = isCorrect ? 'bg-[#22c55e]' : 'bg-[#ef4444]';
  const darkerColor = isCorrect ? 'bg-[#15803d]' : 'bg-[#b91c1c]';
  const ShapeIcon = SHAPES[correctOption.shape];

  return (
    <div className={`flex flex-col items-center justify-center h-screen ${bgColor} text-white p-4 md:p-6 relative overflow-hidden transition-colors duration-500`}>
      
      {/* Dynamic Background Circles */}
      <motion.div 
        animate={{ scale: [1, 1.2, 1], opacity: [0.1, 0.2, 0.1] }}
        transition={{ repeat: Infinity, duration: 4 }}
        className="absolute w-[800px] h-[800px] bg-white rounded-full blur-3xl opacity-10 pointer-events-none"
      />

      <motion.div
        initial={{ scale: 0.5, opacity: 0 }}
        animate={{ scale: 1, opacity: 1 }}
        transition={{ type: "spring", bounce: 0.6 }}
        className="flex flex-col items-center z-10"
      >
        <div className="bg-white p-4 md:p-6 rounded-full shadow-[0_6px_0_rgba(0,0,0,0.2)] md:shadow-[0_10px_0_rgba(0,0,0,0.2)] mb-4 md:mb-8">
            {isCorrect ? (
                <Check className="w-12 h-12 md:w-20 md:h-20 text-[#22c55e]" strokeWidth={4} />
            ) : (
                <X className="w-12 h-12 md:w-20 md:h-20 text-[#ef4444]" strokeWidth={4} />
            )}
        </div>

        <h1 className="text-4xl md:text-8xl font-black font-display mb-2 md:mb-4 drop-shadow-lg text-center">
            {isCorrect ? "Correct!" : "Incorrect"}
        </h1>

        <motion.div 
            initial={{ y: 20, opacity: 0 }}
            animate={{ y: 0, opacity: 1 }}
            transition={{ delay: 0.2 }}
            className="flex flex-col items-center"
        >
            {isCorrect ? (
                <div className="flex flex-col items-center gap-2 md:gap-4 mb-4 md:mb-8">
                    <div className="bg-black/20 px-4 md:px-8 py-2 md:py-4 rounded-2xl md:rounded-3xl backdrop-blur-sm border-2 md:border-4 border-white/30 flex items-center gap-2 md:gap-4">
                        <span className="text-2xl md:text-4xl font-black">+{pointsEarned}</span>
                        <span className="text-sm md:text-base font-bold uppercase opacity-80">Points</span>
                    </div>
                    {correctOption.reason && (
                      <p className="text-center text-sm md:text-lg opacity-90 max-w-md bg-black/10 px-3 md:px-4 py-2 rounded-xl">
                        {correctOption.reason}
                      </p>
                    )}
                </div>
            ) : (
                <div className="text-base md:text-2xl font-bold opacity-90 mb-4 md:mb-8 max-w-xs md:max-w-md text-center px-4">
                    Don't worry, you can catch up in the next round!
                </div>
            )}

            {/* Streak Indicator */}
            {streak > 1 && isCorrect && (
                <div className="flex items-center gap-2 text-yellow-200 font-black text-lg md:text-2xl animate-pulse">
                    <Flame className="w-5 h-5 md:w-6 md:h-6" fill="currentColor" />
                    <span>Answer Streak: {streak}</span>
                </div>
            )}
            
            <div className="mt-4 md:mt-8 bg-black/20 px-4 md:px-6 py-2 rounded-xl text-base md:text-xl font-bold">
                Total Score: <AnimatedCounter from={newScore - (pointsEarned || 0)} to={newScore} />
            </div>
        </motion.div>


      </motion.div>

      {!isCorrect && (
           <div className={`absolute bottom-0 left-0 right-0 overflow-hidden z-20 ${(isHost || isPresenter) ? 'pb-16 md:pb-20' : ''}`}>
             <motion.div 
                initial={{ y: "100%" }}
                animate={{ y: 0 }}
                transition={{ delay: 0.5, type: 'spring' }}
                className="bg-black/30 backdrop-blur-md p-4 md:p-6 pb-8 md:pb-12"
             >
                {selectedOption && selectedOption.reason && (
                  <div className="mb-3 md:mb-4 pb-3 md:pb-4 border-b border-white/20">
                    <p className="text-center text-xs md:text-sm font-bold uppercase tracking-widest mb-1 md:mb-2 opacity-70">Why your answer was wrong</p>
                    <p className="text-center text-xs md:text-sm opacity-90 max-w-md mx-auto">
                      {selectedOption.reason}
                    </p>
                  </div>
                )}
                <p className="text-center text-xs md:text-sm font-bold uppercase tracking-widest mb-2 md:mb-4 opacity-70">The correct answer was</p>
                <div className="flex flex-col items-center gap-2 md:gap-3">
                    <div className="flex items-center gap-3 md:gap-4">
                        <div className={`${COLORS[correctOption.color]} p-2 md:p-3 rounded-lg md:rounded-xl shadow-lg`}>
                            <ShapeIcon className="w-5 h-5 md:w-6 md:h-6" fill="currentColor" />
                        </div>
                        <span className="text-xl md:text-2xl font-black">{correctOption.text}</span>
                    </div>
                    {correctOption.reason && (
                      <p className="text-center text-xs md:text-sm opacity-80 max-w-md mt-1 md:mt-2">
                        {correctOption.reason}
                      </p>
                    )}
                </div>
             </motion.div>
           </div>
      )}

      {/* Host participating gets the continue button */}
      {isHost && onNext && (
        <motion.button
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ delay: 0.5 }}
          onClick={onNext}
          className="fixed bottom-6 left-1/2 -translate-x-1/2 bg-white text-gray-900 px-6 md:px-8 py-3 md:py-4 rounded-xl md:rounded-2xl text-base md:text-xl font-black shadow-[0_6px_0_rgba(0,0,0,0.3)] active:shadow-none active:translate-y-[6px] transition-all flex items-center gap-2 hover:bg-gray-100 z-30 cursor-pointer"
        >
          Continue to Scoreboard
          <ChevronRight className="w-5 h-5 md:w-7 md:h-7" strokeWidth={3} />
        </motion.button>
      )}

      {/* Presenter (non-host) gets the continue button */}
      {!isHost && isPresenter && onPresenterAdvance && (
        <motion.button
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ delay: 0.5 }}
          onClick={onPresenterAdvance}
          className="fixed bottom-6 left-1/2 -translate-x-1/2 bg-white text-gray-900 px-6 md:px-8 py-3 md:py-4 rounded-xl md:rounded-2xl text-base md:text-xl font-black shadow-[0_6px_0_rgba(0,0,0,0.3)] active:shadow-none active:translate-y-[6px] transition-all flex items-center gap-2 hover:bg-gray-100 z-30 cursor-pointer"
        >
          Continue to Scoreboard
          <ChevronRight className="w-5 h-5 md:w-7 md:h-7" strokeWidth={3} />
        </motion.button>
      )}
    </div>
  );
};