import React, { useEffect, useState } from 'react';
import { createPortal } from 'react-dom';
import { Task, TaskPriority } from '../types';

interface TaskCompleteModalProps {
    task: Task;
    level: number;
    onClose: () => void;
}

const ENCOURAGEMENTS: Record<TaskPriority, string[]> = {
    high: [
        '太棒了！你攻克了最难的一关！🔥',
        '出色的工作！高难度任务也难不倒你！💪',
        '了不起！挑战完成了，你是最强的！⭐',
        '征服高难度任务的感觉真好！继续保持！🎯',
    ],
    medium: [
        '干得漂亮！稳步前进中！🚀',
        '出色的工作！继续保持这个节奏！✨',
        '又完成了一项！你正在不断进步！🌟',
        '很棒！一步一个脚印，离目标更近了！👏',
    ],
    low: [
        '轻松搞定！积少成多！💧',
        '完成啦！每一个小任务都算数！🌱',
        '搞定！小胜利也是胜利！🎯',
        '又一步完成了！保持节奏！😊',
    ],
};

const LEVEL_LABELS: Record<number, string> = {
    0: '阶段',
    1: '任务',
    2: '子任务',
};

const EMOJIS_BY_LEVEL: Record<number, string[]> = {
    0: ['🏆', '🎊', '🎉', '🥇'],
    1: ['⭐', '✨', '💫', '🌟'],
    2: ['👍', '👏', '💪', '🎯'],
};

function getEncouragement(priority: TaskPriority, level: number): string {
    const pool = ENCOURAGEMENTS[priority] || ENCOURAGEMENTS.medium;
    const idx = (priority.charCodeAt(0) + level) % pool.length;
    return pool[idx];
}

const TaskCompleteModal: React.FC<TaskCompleteModalProps> = ({ task, level, onClose }) => {
    const [visible, setVisible] = useState(false);

    useEffect(() => {
        requestAnimationFrame(() => setVisible(true));
        const timer = setTimeout(() => handleClose(), 4000);
        return () => clearTimeout(timer);
    }, []);

    const handleClose = () => {
        setVisible(false);
        setTimeout(onClose, 300);
    };

    const encouragement = getEncouragement(task.priority, level);
    const levelLabel = LEVEL_LABELS[level] || '任务';
    const emojis = EMOJIS_BY_LEVEL[level] || EMOJIS_BY_LEVEL[2];
    const mainEmoji = emojis[Math.floor(Math.random() * emojis.length)];

    return createPortal(
        <div
            className="fixed inset-0 z-[150] flex items-center justify-center"
            onClick={handleClose}
        >
            <div
                className="absolute inset-0 bg-black/40 backdrop-blur-sm transition-opacity duration-300"
                style={{ opacity: visible ? 1 : 0 }}
            />
            <div
                className="relative bg-white dark:bg-slate-800 rounded-2xl shadow-2xl border border-slate-200 dark:border-slate-600 max-w-sm w-full mx-4 overflow-hidden"
                style={{
                    opacity: visible ? 1 : 0,
                    transform: visible ? 'scale(1)' : 'scale(0.8)',
                    transition: 'all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1)',
                }}
                onClick={(e) => e.stopPropagation()}
            >
                {/* Confetti strip */}
                <div className="h-1.5 flex">
                    {['#f59e0b', '#ef4444', '#3b82f6', '#10b981', '#8b5cf6', '#ec4899', '#f97316'].map((c, i) => (
                        <div key={i} className="flex-1" style={{ backgroundColor: c }} />
                    ))}
                </div>

                <div className="px-6 pt-6 pb-5 text-center">
                    {/* Emoji with bounce */}
                    <div
                        className="text-5xl mb-3"
                        style={{
                            animation: visible ? 'taskCompleteEmoji 0.6s ease-out' : 'none',
                        }}
                    >
                        {mainEmoji}
                    </div>

                    {/* Level badge */}
                    <span className="inline-block text-[10px] font-bold px-2 py-0.5 rounded-full bg-emerald-100 text-emerald-700 dark:bg-emerald-900/30 dark:text-emerald-300 mb-2">
                        {levelLabel}完成
                    </span>

                    {/* Task title */}
                    <h3 className="text-lg font-bold text-slate-800 dark:text-slate-100 mt-2 mb-1 line-clamp-2">
                        {task.title}
                    </h3>

                    {/* Encouragement */}
                    <p className="text-sm text-slate-500 dark:text-slate-400 mb-5">
                        {encouragement}
                    </p>

                    {/* Progress ring */}
                    <div className="flex items-center justify-center gap-3 mb-5">
                        <svg className="w-12 h-12" viewBox="0 0 36 36">
                            <circle cx="18" cy="18" r="15.5" fill="none" stroke="currentColor" className="text-slate-100 dark:text-slate-700" strokeWidth="3" />
                            <circle
                                cx="18" cy="18" r="15.5" fill="none" stroke="currentColor"
                                className="text-emerald-500"
                                strokeWidth="3"
                                strokeDasharray="97.4"
                                strokeDashoffset="0"
                                strokeLinecap="round"
                                style={{
                                    animation: visible ? 'taskCompleteRing 0.8s ease-out 0.2s both' : 'none',
                                }}
                            />
                            <text x="18" y="18" textAnchor="middle" dominantBaseline="central"
                                className="fill-emerald-600 dark:fill-emerald-400 text-[9px] font-bold"
                            >✓</text>
                        </svg>
                        <span className="text-xs text-slate-400 dark:text-slate-500">已完成</span>
                    </div>

                    {/* Close button */}
                    <button
                        onClick={handleClose}
                        className="w-full bg-gradient-to-r from-emerald-500 to-green-500 text-white font-semibold py-2.5 rounded-xl hover:from-emerald-600 hover:to-green-600 transition-all shadow-md shadow-emerald-200 dark:shadow-emerald-900/30 active:scale-[0.97]"
                    >
                        继续前进
                    </button>
                </div>

                {/* Floating particles */}
                <div className="absolute inset-0 pointer-events-none overflow-hidden">
                    {Array.from({ length: 12 }).map((_, i) => (
                        <div
                            key={i}
                            className="absolute rounded-full"
                            style={{
                                left: `${10 + Math.random() * 80}%`,
                                bottom: '-5%',
                                width: `${4 + Math.random() * 5}px`,
                                height: `${4 + Math.random() * 5}px`,
                                backgroundColor: ['#f59e0b', '#ef4444', '#3b82f6', '#10b981', '#8b5cf6', '#ec4899'][i % 6],
                                animation: visible ? `taskCompleteParticle ${1 + Math.random() * 1.5}s ease-out ${Math.random() * 0.3}s forwards` : 'none',
                                opacity: 0,
                            }}
                        />
                    ))}
                </div>
            </div>

            <style>{`
                @keyframes taskCompleteEmoji {
                    0% { opacity: 0; transform: scale(0) rotate(-30deg); }
                    50% { transform: scale(1.3) rotate(5deg); }
                    70% { transform: scale(0.9) rotate(-2deg); }
                    100% { opacity: 1; transform: scale(1) rotate(0deg); }
                }
                @keyframes taskCompleteRing {
                    from { stroke-dashoffset: 97.4; }
                    to { stroke-dashoffset: 0; }
                }
                @keyframes taskCompleteParticle {
                    0% { transform: translateY(0) scale(0); opacity: 0; }
                    20% { opacity: 1; transform: translateY(-20px) scale(1); }
                    100% { transform: translateY(-120px) scale(0.3); opacity: 0; }
                }
            `}</style>
        </div>,
        document.body
    );
};

export default TaskCompleteModal;