import React, { useEffect, useState } from 'react';
import { ExternalLink, Globe2, Instagram, Linkedin, Loader2, UserRound, Youtube } from 'lucide-react';
import { useParams } from 'react-router-dom';
import { Course } from '../types';
import { getPublicProfile, InstructorProfileData } from '../services/db';
import { CourseCoverImage } from '../components/CourseCoverImage';
import { CourseCard } from '../components/CourseCard';

const networks = [
  { key: 'websiteUrl', label: 'Site', icon: Globe2 },
  { key: 'linkedinUrl', label: 'LinkedIn', icon: Linkedin },
  { key: 'instagramUrl', label: 'Instagram', icon: Instagram },
  { key: 'youtubeUrl', label: 'YouTube', icon: Youtube },
] as const;

export const InstructorProfile: React.FC<{ onPlay: (course: Course) => void }> = ({ onPlay }) => {
  const { instructorId, profileId } = useParams<{ instructorId?: string; profileId?: string }>();
  const publicProfileId = instructorId || profileId;
  const [profile, setProfile] = useState<InstructorProfileData | null>(null);
  const [state, setState] = useState<'loading' | 'ready' | 'missing'>('loading');

  useEffect(() => {
    if (!publicProfileId) return;
    setState('loading');
    getPublicProfile(publicProfileId).then((data) => { setProfile(data); setState('ready'); }).catch(() => setState('missing'));
  }, [publicProfileId]);

  if (state === 'loading') return <main className="min-h-[65vh] pt-32 flex items-center justify-center"><Loader2 className="h-8 w-8 animate-spin text-orange-400" /></main>;
  if (state === 'missing' || !profile) return <main className="mx-auto flex min-h-[65vh] max-w-5xl items-center px-6 pt-24"><div><p className="text-sm font-semibold uppercase tracking-widest text-orange-400">Perfil indisponível</p><h1 className="mt-3 text-3xl font-bold">Este perfil não está público.</h1></div></main>;

  const isInstructor = profile.role === 'instructor' || profile.role === 'admin';

  return <main className="min-h-screen pb-20 pt-20"><section className="border-b border-white/10 bg-gradient-to-br from-orange-500/15 via-zinc-950 to-black"><div className="mx-auto grid max-w-6xl gap-7 px-6 py-12 sm:px-8 md:grid-cols-[auto_1fr] md:items-center md:py-16"><div className="h-32 w-32 overflow-hidden rounded-full border-4 border-zinc-900 bg-zinc-800 shadow-2xl shadow-black/50">{profile.avatarImageUrl ? <CourseCoverImage source={profile.avatarImageUrl} alt={`Foto de ${profile.name}`} className="h-full w-full object-cover" /> : <div className="flex h-full w-full items-center justify-center bg-orange-500/15"><UserRound className="h-14 w-14 text-orange-300" /></div>}</div><div><p className="text-xs font-bold uppercase tracking-[0.18em] text-orange-400">{isInstructor ? 'Instrutor' : 'Aluno'}</p><h1 className="mt-2 text-3xl font-bold tracking-tight text-white sm:text-5xl">{profile.name}</h1>{profile.headline && <p className="mt-3 text-lg text-gray-300">{profile.headline}</p>}<div className="mt-5 flex flex-wrap gap-2">{networks.map(({ key, label, icon: Icon }) => { const url = profile[key]; return url ? <a key={key} href={url} target="_blank" rel="noreferrer" className="inline-flex items-center gap-2 rounded-xl border border-white/15 bg-white/5 px-3.5 py-2 text-sm font-semibold text-white transition hover:border-orange-500/40 hover:bg-orange-500/10"><Icon className="h-4 w-4 text-orange-400" />{label}<ExternalLink className="h-3 w-3 text-gray-500" /></a> : null; })}</div></div></div></section><div className={`mx-auto max-w-6xl gap-12 px-6 py-12 sm:px-8 ${isInstructor ? 'grid lg:grid-cols-[minmax(0,0.7fr)_minmax(0,1.3fr)]' : 'max-w-3xl'}`}><aside><p className="text-xs font-bold uppercase tracking-[0.18em] text-orange-400">Sobre</p><h2 className="mt-2 text-2xl font-bold text-white">Conheça {profile.name.split(' ')[0]}</h2><p className="mt-5 whitespace-pre-line text-sm leading-7 text-gray-300">{profile.bio || `${isInstructor ? 'Este instrutor' : 'Este aluno'} ainda não adicionou uma apresentação.`}</p></aside>{isInstructor && <section><div className="mb-6 flex items-end justify-between gap-4"><div><p className="text-xs font-bold uppercase tracking-[0.18em] text-orange-400">Conteúdo</p><h2 className="mt-2 text-2xl font-bold text-white">Cursos publicados</h2></div><span className="rounded-full bg-white/5 px-3 py-1.5 text-xs font-semibold text-gray-300">{profile.courses.length} {profile.courses.length === 1 ? 'curso' : 'cursos'}</span></div>{profile.courses.length ? <div className="grid gap-7 sm:grid-cols-2">{profile.courses.map((course) => <CourseCard key={course.id} course={course} variant="landscape" onClick={onPlay} />)}</div> : <div className="rounded-2xl border border-dashed border-white/15 p-8 text-center text-sm text-gray-500">Nenhum curso publicado ainda.</div>}</section>}</div></main>;
};