import AuthenticatedLayout from '@/Layouts/AuthenticatedLayout';
import { Head, Link, router } from '@inertiajs/react';
import { useState, useEffect } from 'react';
import { Plyr } from 'plyr-react';
import 'plyr-react/plyr.css';
import { 
    CheckCircle2, 
    ChevronLeft, 
    Circle, 
    FileText, 
    Play, 
    Video, 
    Menu, 
    Volume2, 
    BookOpen,
    ArrowRight,
    Trophy
} from 'lucide-react';
import { Button } from '@/Components/ui/button';
import { Progress } from '@/Components/ui/progress';
import { FuriganaText } from '@/lib/furigana';
import { 
    Sheet, 
    SheetContent, 
    SheetHeader, 
    SheetTitle, 
    SheetTrigger 
} from "@/Components/ui/sheet";

interface VocabularyData {
    id: string;
    word: string;
    reading: string;
    romaji: string;
    meaning_id: string;
    meaning_en: string;
    type: string;
    audio_url: string | null;
}

interface LessonData {
    id: string;
    title: string;
    slug: string;
    type: 'video' | 'text' | 'pdf';
    is_completed: boolean;
}

interface ModuleData {
    id: string;
    title: string;
    lessons: LessonData[];
}

interface CourseData {
    id: string;
    title: string;
    slug: string;
    modules: ModuleData[];
}

interface CurrentLessonData {
    id: string;
    title: string;
    slug: string;
    type: 'video' | 'text' | 'pdf';
    content: string | null;
    video_url: string | null;
    content_pdf: string | null;
    vocabularies: VocabularyData[];
}

interface ProgressData {
    completed_count: number;
    total_count: number;
    percentage: number;
}

interface PlayerProps {
    course: CourseData;
    currentLesson: CurrentLessonData;
    progress: ProgressData;
    auth: {
        user: any;
    };
}

// Helper to get YouTube video ID
function getYouTubeId(url: string | null): string | null {
    if (!url) return null;
    const regExp = /^.*(youtu.be\/|v\/|u\/\w\/|embed\/|watch\?v=|&v=)([^#&?]*).*/;
    const match = url.match(regExp);
    return (match && match[2].length === 11) ? match[2] : null;
}

export default function Player({ course, currentLesson, progress, auth }: PlayerProps) {
    const [sidebarOpen, setSidebarOpen] = useState(true);
    const [isPlaying, setIsPlaying] = useState<string | null>(null);

    const handleComplete = () => {
        router.post(route('lessons.complete', { lesson: currentLesson.id }));
    };

    const playAudio = (url: string, id: string) => {
        const audio = new Audio(url);
        setIsPlaying(id);
        audio.play();
        audio.onended = () => setIsPlaying(null);
    };

    const videoSource = currentLesson.video_url ? {
        type: 'video' as const,
        sources: [{
            src: getYouTubeId(currentLesson.video_url) || currentLesson.video_url,
            provider: currentLesson.video_url.includes('youtube') ? 'youtube' as const : 'html5' as const,
        }],
    } : null;

    const NavigationContent = () => (
        <div className="space-y-6">
            <h3 className="text-xs font-black text-gray-400 uppercase tracking-widest pl-1">Daftar Materi</h3>
            
            <div className="space-y-4">
                {course.modules.map((module) => (
                    <div key={module.id} className="space-y-2">
                        <div className="flex items-center gap-2 group cursor-default">
                             <div className="w-1 h-4 bg-nihonbuzz-red/30 rounded-full group-hover:bg-nihonbuzz-red transition-colors" />
                             <h4 className="font-black text-gray-800 text-xs uppercase tracking-tight">{module.title}</h4>
                        </div>
                        <ul className="space-y-1 ml-1">
                            {module.lessons.map((lesson) => (
                                <li key={lesson.id}>
                                    <Link
                                        href={route('courses.learn', { course: course.slug, lesson: lesson.slug })}
                                        className={`flex items-center gap-3 p-3 rounded-xl transition-all text-sm group ${
                                            lesson.id === currentLesson.id
                                                ? 'bg-nihonbuzz-red text-white shadow-lg shadow-nihonbuzz-red/20 font-bold'
                                                : 'hover:bg-gray-100 text-gray-600'
                                        }`}
                                    >
                                        <div className="relative flex items-center justify-center shrink-0">
                                            {lesson.is_completed ? (
                                                <div className="bg-green-100 p-0.5 rounded-full">
                                                    <CheckCircle2 className="w-4 h-4 text-green-600" />
                                                </div>
                                            ) : lesson.id === currentLesson.id ? (
                                                <Play className="w-4 h-4 text-white fill-current" />
                                            ) : (
                                                <Circle className="w-4 h-4 text-gray-300 group-hover:text-gray-400" />
                                            )}
                                        </div>
                                        <span className="line-clamp-1">{lesson.title}</span>
                                    </Link>
                                </li>
                            ))}
                        </ul>
                    </div>
                ))}
            </div>
        </div>
    );

    return (
        <AuthenticatedLayout
            header={
                <div className="flex items-center justify-between gap-4 px-2 lg:px-0">
                    <div className="flex items-center gap-2 lg:gap-4 overflow-hidden">
                        <Link href={route('courses.index')} className="p-2.5 rounded-xl bg-gray-50 hover:bg-white hover:shadow-md border border-gray-100 transition-all text-gray-500 hover:text-nihonbuzz-red shrink-0">
                            <ChevronLeft className="w-5 h-5" />
                        </Link>
                        <div className="overflow-hidden">
                            <h2 className="text-sm lg:text-base font-black text-gray-900 line-clamp-1 flex items-center gap-2">
                                <span className="text-nihonbuzz-red truncate">{course.title}</span>
                            </h2>
                            <div className="flex items-center gap-2 mt-0.5">
                                <Progress value={progress.percentage} className="w-20 lg:w-32 h-1.5" />
                                <span className="text-[10px] font-bold text-gray-400 whitespace-nowrap">{progress.percentage}%</span>
                            </div>
                        </div>
                    </div>

                    <div className="flex items-center gap-3 shrink-0">
                        {/* Mobile Navigation Trigger */}
                        <Sheet>
                            <SheetTrigger asChild>
                                <Button variant="outline" size="icon" className="lg:hidden rounded-xl border-gray-200">
                                    <Menu className="w-5 h-5 text-gray-600" />
                                </Button>
                            </SheetTrigger>
                            <SheetContent side="right" className="p-0 border-l border-gray-100">
                                <SheetHeader className="p-6 border-b border-gray-50 text-left">
                                    <SheetTitle className="text-xl font-black">{course.title}</SheetTitle>
                                    <p className="text-xs text-nihonbuzz-red font-bold uppercase tracking-widest">Kurikulum Kursus</p>
                                </SheetHeader>
                                <div className="p-6 overflow-y-auto h-[calc(100vh-120px)]">
                                    <NavigationContent />
                                </div>
                            </SheetContent>
                        </Sheet>
                        
                        <div className="hidden lg:flex items-center gap-2 px-4 py-2 bg-yellow-50 rounded-full border border-yellow-100">
                            <Trophy className="w-4 h-4 text-yellow-600" />
                            <span className="text-xs font-black text-yellow-700">{auth.user.xp_points} XP</span>
                        </div>
                    </div>
                </div>
            }
        >
            <Head title={`${currentLesson.title} - ${course.title}`} />

            <div className="flex min-h-[calc(100vh-80px)] bg-gray-50/30">
                {/* Main Content Area */}
                <div className={`flex-1 overflow-y-auto p-4 lg:p-10 transition-all ${sidebarOpen ? 'lg:mr-80' : ''}`}>
                    <div className="max-w-4xl mx-auto space-y-8 animate-in fade-in slide-in-from-bottom-4 duration-500">
                        
                        {/* Video Player */}
                        {currentLesson.type === 'video' && videoSource && (
                            <div className="relative group shadow-2xl rounded-3xl overflow-hidden ring-1 ring-black/5 bg-black aspect-video transition-transform hover:scale-[1.01] duration-500">
                                <Plyr source={videoSource} />
                            </div>
                        )}

                        {/* Title & Stats */}
                        <div className="bg-white p-6 lg:p-8 rounded-[32px] shadow-sm border border-gray-100 relative overflow-hidden group">
                           <div className="absolute top-0 right-0 w-32 h-32 bg-gray-50 -mr-16 -mt-16 rounded-full opacity-50 group-hover:scale-110 transition-transform duration-700" />
                           <div className="relative space-y-3">
                                <div className="flex items-center gap-2 text-[10px] font-black tracking-widest text-nihonbuzz-red uppercase">
                                    <span className="px-2 py-0.5 bg-nihonbuzz-red/10 rounded-full">{currentLesson.type}</span>
                                    {currentLesson.is_completed && <span className="px-2 py-0.5 bg-green-100 text-green-600 rounded-full">Completed</span>}
                                </div>
                                <h1 className="text-2xl lg:text-3xl font-black text-gray-900 leading-tight">
                                    <FuriganaText text={currentLesson.title} />
                                </h1>
                           </div>
                        </div>

                        {/* Text Content */}
                        {currentLesson.type === 'text' && currentLesson.content && (
                            <div className="bg-white p-8 lg:p-12 rounded-[40px] shadow-sm border border-gray-100">
                                <article className="prose prose-nihonbuzz prose-lg lg:prose-xl max-w-none">
                                    {/* Ideally we'd have a parser for the whole content HTML too, 
                                        but for now we trust the seeder gives us plain text with furigana markers or HTML */}
                                    <FuriganaText text={currentLesson.content} />
                                </article>
                            </div>
                        )}

                        {/* PDF Content */}
                        {currentLesson.type === 'pdf' && currentLesson.content_pdf && (
                            <div className="aspect-[3/4] w-full rounded-[40px] overflow-hidden shadow-2xl ring-1 ring-black/5">
                                <iframe
                                    src={currentLesson.content_pdf}
                                    className="w-full h-full"
                                    title={currentLesson.title}
                                />
                            </div>
                        )}

                        {/* Vocabulary Section */}
                        {currentLesson.vocabularies?.length > 0 && (
                            <div className="space-y-6">
                                <div className="flex items-center gap-3">
                                    <div className="bg-nihonbuzz-red/10 p-2 rounded-2xl">
                                        <BookOpen className="w-5 h-5 text-nihonbuzz-red" />
                                    </div>
                                    <h2 className="text-xl font-black text-gray-900 tracking-tight">Kosa Kata Fokus</h2>
                                </div>
                                
                                <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                                    {currentLesson.vocabularies.map((vocab) => (
                                        <div key={vocab.id} className="bg-white p-5 rounded-3xl border border-gray-100 shadow-sm flex items-center justify-between group hover:border-nihonbuzz-red/30 transition-all hover:shadow-md">
                                            <div className="flex items-center gap-4">
                                                <div 
                                                    onClick={() => vocab.audio_url && playAudio(vocab.audio_url, vocab.id)}
                                                    className={`w-12 h-12 rounded-2xl flex items-center justify-center transition-all cursor-pointer ${
                                                        isPlaying === vocab.id ? 'bg-nihonbuzz-red text-white scale-95 shadow-inner' : 'bg-gray-50 text-gray-400 group-hover:bg-nihonbuzz-red/5 group-hover:text-nihonbuzz-red'
                                                    }`}
                                                >
                                                    {isPlaying === vocab.id ? <Volume2 className="w-5 h-5 animate-pulse" /> : <Volume2 className="w-5 h-5" />}
                                                </div>
                                                <div>
                                                    <FuriganaText text={vocab.word} className="text-lg font-black text-gray-900" />
                                                    <div className="flex items-center gap-2 mt-0.5">
                                                        <span className="text-xs font-bold text-nihonbuzz-red">{vocab.reading}</span>
                                                        <span className="text-[10px] text-gray-400 uppercase font-black">{vocab.type}</span>
                                                    </div>
                                                </div>
                                            </div>
                                            <div className="text-right pr-2">
                                                <p className="font-bold text-gray-700">{vocab.meaning_id}</p>
                                                <p className="text-[11px] text-gray-400">{vocab.romaji}</p>
                                            </div>
                                        </div>
                                    ))}
                                </div>
                            </div>
                        )}

                        {/* Navigation Footer */}
                        <div className="flex flex-col sm:flex-row items-center justify-between gap-6 pt-10 border-t border-gray-100">
                            <div className="flex items-center gap-6">
                                <div className="flex -space-x-3 overflow-hidden">
                                     <div className="w-10 h-10 rounded-full border-4 border-white bg-gray-100 flex items-center justify-center font-bold text-nihonbuzz-red text-xs">NB</div>
                                     <div className="w-10 h-10 rounded-full border-4 border-white bg-red-50 flex items-center justify-center font-bold text-nihonbuzz-red text-xs">🇯🇵</div>
                                </div>
                                <div className="text-left">
                                    <p className="text-sm font-black text-gray-900 tracking-tight">NihonBuzz Academy</p>
                                    <p className="text-xs text-nihonbuzz-red font-bold uppercase tracking-widest">Master Japanese Effortlessly</p>
                                </div>
                            </div>
                            
                            <Button 
                                onClick={handleComplete}
                                size="lg"
                                className={`rounded-full px-12 py-7 text-base font-black shadow-2xl transition-all hover:scale-105 active:scale-95 group ${
                                    currentLesson.is_completed 
                                    ? 'bg-green-500 hover:bg-green-600 shadow-green-200 text-white' 
                                    : 'bg-nihonbuzz-red hover:bg-nihonbuzz-red/90 shadow-nihonbuzz-red/20 text-white'
                                }`}
                            >
                                {currentLesson.is_completed ? (
                                    <>Selesai! Tonton Lagi</>
                                ) : (
                                    <>Tandai Selesai <ArrowRight className="w-5 h-5 ml-2 group-hover:translate-x-1 transition-transform" /></>
                                )}
                            </Button>
                        </div>
                    </div>
                </div>

                {/* Sidebar - Desktop Navigation */}
                <aside className={`fixed right-0 top-16 bottom-0 w-80 bg-white border-l border-gray-50 overflow-y-auto transition-all shadow-[-10px_0_30px_rgba(0,0,0,0.02)] ${sidebarOpen ? 'translate-x-0' : 'translate-x-full'} hidden lg:block z-10`}>
                    <div className="p-8 h-full flex flex-col">
                        <NavigationContent />
                        
                        <div className="mt-auto pt-10">
                             <div className="bg-nihonbuzz-red/5 p-6 rounded-[32px] border border-nihonbuzz-red/10 text-center space-y-3 relative overflow-hidden group">
                                <div className="absolute inset-0 bg-nihonbuzz-red/5 translate-y-full group-hover:translate-y-0 transition-transform duration-500" />
                                <div className="relative">
                                    <div className="inline-flex items-center justify-center w-12 h-12 bg-nihonbuzz-red text-white rounded-2xl shadow-lg shadow-nihonbuzz-red/20 mb-2">
                                        <Trophy className="w-6 h-6" />
                                    </div>
                                    <p className="text-sm font-black text-gray-900">Selesaikan untuk XP!</p>
                                    <p className="text-[10px] font-bold text-nihonbuzz-red uppercase tracking-widest">+50 XP Per Materi</p>
                                </div>
                             </div>
                        </div>
                    </div>
                </aside>
            </div>
        </AuthenticatedLayout>
    );
}

