"use client";

import { useState, useEffect } from "react";

interface QuizQuestion {
    id: string;
    question: string;
    options: string[];
    correct: number[];
    type?: 'multiple-choice' | 'true-false' | 'multiple-select';
}

interface QuizPlayerProps {
    id: string;
    title?: string;
    quizData: {
        questions: QuizQuestion[];
    };
    allowRetry?: boolean;
    maxAttempts?: number;
    initialAttempts?: number;
    onAttempt?: () => void;
}

export default function QuizPlayer({ id, title, quizData, allowRetry = true, maxAttempts = 0, initialAttempts = 0, onAttempt }: QuizPlayerProps) {
    const [userAnswers, setUserAnswers] = useState<Record<string, number[]>>({});
    const [submitted, setSubmitted] = useState(false);
    const [attempts, setAttempts] = useState(initialAttempts || 0);

    const questions = quizData?.questions || [];

    // Sync attempts with prop
    useEffect(() => {
        if (initialAttempts !== undefined) {
            setAttempts(initialAttempts);
        }
    }, [initialAttempts]);

    const handleAnswer = (qId: string, optionIndex: number, isMulti: boolean) => {
        if (submitted) return;
        setUserAnswers(prev => {
            const current = prev[qId] || [];
            if (isMulti) {
                const next = current.includes(optionIndex)
                    ? current.filter(i => i !== optionIndex)
                    : [...current, optionIndex].sort((a, b) => a - b);
                return { ...prev, [qId]: next };
            } else {
                return { ...prev, [qId]: [optionIndex] };
            }
        });
    };

    const handleValidate = () => {
        if (maxAttempts > 0 && attempts >= maxAttempts) return;

        setSubmitted(true);
        if (onAttempt) {
            onAttempt();
            setAttempts(prev => prev + 1);
        }
    };

    return (
        <div className="space-y-8 notranslate" id={id} translate="no">
            <div className="space-y-2">
                <h3 className="text-xl font-bold border-l-4 border-blue-600 dark:border-blue-500 pl-4 py-1 tracking-tight text-gray-900 dark:text-white uppercase tracking-widest text-[10px]">
                    {title || "Verificación de Conocimientos"}
                </h3>
                {maxAttempts > 0 && (
                    <span className="text-[10px] font-bold uppercase tracking-widest px-3 py-1 rounded-full bg-black/5 dark:bg-white/5 border border-black/5 dark:border-white/5 text-gray-500 dark:text-gray-400">
                        Intento {attempts} / {maxAttempts}
                    </span>
                )}
            </div>

            <div className="space-y-8">
                {questions.map((q) => (
                    <fieldset key={q.id} className="space-y-4 p-8 glass border-black/5 dark:border-white/5 rounded-3xl bg-black/[0.02] dark:bg-black/20" aria-labelledby={`q-${q.id}-text`}>
                        <legend id={`q-${q.id}-text`} className="font-bold text-xl text-gray-900 dark:text-gray-100 leading-tight mb-4">{q.question}</legend>
                        <div
                            className="grid gap-3"
                            role={q.type === 'multiple-select' ? 'group' : 'radiogroup'}
                            aria-label="Opciones de respuesta"
                        >
                            {q.options.map((opt, oIdx) => {
                                const isSelected = userAnswers[q.id]?.includes(oIdx);
                                const isCorrect = q.correct?.includes(oIdx);
                                const isActuallyCorrect = isCorrect && isSelected;
                                const isWrongSelection = !isCorrect && isSelected;
                                const missedCorrect = isCorrect && !isSelected;

                                let style = "glass border-black/10 dark:border-white/10 hover:bg-black/5 dark:hover:bg-white/5 text-gray-700 dark:text-gray-300";
                                if (submitted) {
                                    if (isActuallyCorrect) style = "bg-green-500/20 border-green-500 text-green-400";
                                    else if (isWrongSelection) style = "bg-red-500/20 border-red-500 text-red-100";
                                    else if (missedCorrect) style = "border-orange-500/50 text-orange-400 animate-pulse";
                                    else style = "opacity-50 grayscale border-white/5";
                                } else if (isSelected) {
                                    style = "bg-blue-600/10 dark:bg-blue-500/20 border-blue-600 dark:border-blue-500 text-blue-700 dark:text-white shadow-[0_0_20px_rgba(59,130,246,0.2)]";
                                }

                                return (
                                    <button
                                        key={oIdx}
                                        role={q.type === 'multiple-select' ? 'checkbox' : 'radio'}
                                        aria-checked={isSelected}
                                        aria-disabled={submitted}
                                        onClick={() => handleAnswer(q.id, oIdx, q.type === 'multiple-select')}
                                        className={`p-5 rounded-xl border transition-all text-left text-sm font-bold outline-none focus:ring-2 focus:ring-blue-500/50 ${style}`}
                                    >
                                        <div className="flex items-center justify-between">
                                            <span>{opt}</span>
                                            {submitted && (
                                                <div className="flex items-center gap-2">
                                                    {isActuallyCorrect && <span role="img" aria-label="Correcto">✅</span>}
                                                    {isWrongSelection && <span role="img" aria-label="Incorrecto">❌</span>}
                                                    {missedCorrect && <span className="text-[10px] uppercase font-black tracking-tighter text-orange-400">Respuesta Correcta</span>}
                                                </div>
                                            )}
                                        </div>
                                    </button>
                                );
                            })}
                        </div>
                    </fieldset>
                ))}

                {allowRetry && (
                    <>
                        {!submitted && questions.length > 0 && (
                            <button
                                onClick={handleValidate}
                                disabled={maxAttempts > 0 && attempts >= maxAttempts}
                                className={`btn-premium w-full py-5 font-black text-xs uppercase tracking-[0.2em] shadow-xl shadow-blue-500/20 ${maxAttempts > 0 && attempts >= maxAttempts ? 'opacity-50 cursor-not-allowed' : ''}`}
                            >
                                {maxAttempts > 0 && attempts >= maxAttempts ? 'Máximo de Intentos Alcanzado' : 'Validar Respuestas'}
                            </button>
                        )}
                        {submitted && (
                            <button
                                onClick={() => {
                                    if (maxAttempts > 0 && attempts >= maxAttempts) return;
                                    setSubmitted(false);
                                    setUserAnswers({});
                                }}
                                disabled={maxAttempts > 0 && attempts >= maxAttempts}
                                className={`w-full py-5 glass text-blue-600 dark:text-blue-400 font-black text-xs uppercase tracking-[0.2em] hover:bg-black/5 dark:hover:bg-white/5 transition-all rounded-3xl border-black/5 dark:border-white/5 ${maxAttempts > 0 && attempts >= maxAttempts ? 'opacity-50 cursor-not-allowed' : ''}`}
                            >
                                {maxAttempts > 0 && attempts >= maxAttempts ? 'Máximo de Intentos Alcanzado' : 'Intentar de Nuevo'}
                            </button>
                        )}
                    </>
                )}
            </div>
        </div>
    );
}
