import { useState, useEffect } from "react";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { Progress } from "@/components/ui/progress";
import { useUpdatePhonicsProgress } from "@/hooks/phonics/usePhonicsProgress";
import { ExerciseFactory } from "./exercises/ExerciseFactory";
import { Timer } from "lucide-react";
import type { PhonicsExercise, UpdateProgressParams } from "@/types/phonics";
import { cn } from "@/lib/utils";

interface ExercisePlayerProps {
  exercise: PhonicsExercise;
  student_id: string;
  onComplete: (result: {
    score: number;
    stars: number;
    xp_earned: number;
    completed: boolean;
  }) => void;
  onExit: () => void;
}

export function ExercisePlayer({ 
  exercise, 
  student_id, 
  onComplete, 
  onExit 
}: ExercisePlayerProps) {
  const [currentStep, setCurrentStep] = useState(0);
  const [score, setScore] = useState(0);
  const [timeSpent, setTimeSpent] = useState(0);
  const [showFeedback, setShowFeedback] = useState(false);
  const [lastAnswerCorrect, setLastAnswerCorrect] = useState<boolean | null>(null);

  const updateProgress = useUpdatePhonicsProgress();

  useEffect(() => {
    const timer = setInterval(() => {
      setTimeSpent((prev) => prev + 1);
    }, 1000);

    return () => clearInterval(timer);
  }, []);

  const handleAnswer = async (word: string, isCorrect: boolean) => {
    setLastAnswerCorrect(isCorrect);
    setShowFeedback(true);

    if (isCorrect) {
      setScore((prev) => prev + 1);
    }

    // Aguardar feedback antes de prosseguir
    await new Promise(resolve => setTimeout(resolve, 1500));
    setShowFeedback(false);

    // Filtra apenas as palavras corretas
    const correctWords = exercise.words?.filter(w => w.is_correct_answer) || [];

    if (currentStep < correctWords.length - 1) {
      setCurrentStep((prev) => prev + 1);
    } else {
      handleComplete();
    }
  };

  const handleComplete = async () => {
    // Filtra apenas as palavras corretas
    const correctWords = exercise.words?.filter(w => w.is_correct_answer) || [];
    const finalScore = score / correctWords.length;
    const stars = Math.ceil(finalScore * 3);
    const xp_earned = Math.round(finalScore * exercise.points);
    const completed = finalScore >= exercise.required_score;

    const updateParams: UpdateProgressParams = {
      student_id,
      exercise_id: exercise.id,
      best_score: finalScore,
      last_score: finalScore,
      completed,
      stars,
      xp_earned,
      time_spent_seconds: timeSpent,
      correct_answers_count: score,
      total_answers_count: correctWords.length
    };

    await updateProgress.mutateAsync(updateParams);
    onComplete({
      score: finalScore,
      stars,
      xp_earned,
      completed
    });
  };

  if (!exercise.words?.length) {
    return (
      <Card className="w-full max-w-2xl mx-auto">
        <CardContent className="py-8">
          <div className="text-center text-muted-foreground">
            Carregando exercício...
          </div>
        </CardContent>
      </Card>
    );
  }

  // Filtra apenas as palavras corretas e ordena por order_index
  const correctWords = exercise.words
    .filter(w => w.is_correct_answer)
    .sort((a, b) => (a.order_index || 0) - (b.order_index || 0));

  // Pega a palavra atual
  const currentWord = correctWords[currentStep];

  // Pega as opções (incluindo a palavra correta)
  const options = exercise.words
    .filter(w => w.order_index === currentWord.order_index)
    .map(w => w.word)
    .sort(() => Math.random() - 0.5);

  const progress = ((currentStep + 1) / correctWords.length) * 100;

  return (
    <Card className={cn(
      "w-full max-w-2xl mx-auto transition-colors duration-500",
      showFeedback && lastAnswerCorrect && "bg-green-50",
      showFeedback && !lastAnswerCorrect && "bg-red-50"
    )}>
      <CardHeader>
        <div className="flex justify-between items-center">
          <CardTitle>{exercise.title}</CardTitle>
          <div className="flex items-center gap-4">
            <div className="flex items-center gap-2 text-sm text-muted-foreground">
              <Timer className="w-4 h-4" />
              <span>{Math.floor(timeSpent / 60)}:{(timeSpent % 60).toString().padStart(2, '0')}</span>
            </div>
            <Button variant="outline" size="sm" onClick={onExit} trackingId="exercise-player-exit">
              Sair do Exercício
            </Button>
          </div>
        </div>
        <Progress value={progress} className="h-2" />
      </CardHeader>

      <CardContent>
        <div className="space-y-6">
          <div className="text-center text-muted-foreground mb-8">
            Exercício {currentStep + 1} de {correctWords.length}
          </div>

          <ExerciseFactory
            type_id={exercise.type_id}
            currentWord={currentWord.word}
            options={options}
            onAnswer={handleAnswer}
            disabled={showFeedback}
          />

          {showFeedback && (
            <div className={cn(
              "text-center text-lg font-medium py-4 rounded-lg",
              lastAnswerCorrect ? "text-green-600" : "text-red-600"
            )}>
              {lastAnswerCorrect ? "Muito bem!" : "Tente novamente na próxima!"}
            </div>
          )}
        </div>
      </CardContent>
    </Card>
  );
}