import React, { useState } from 'react'
import { router } from '@inertiajs/react'

/**
 * ProfileHero
 * Cover banner + avatar + identity block + action buttons
 */
export default function ProfileHero({ user, profile, isOwner, viewerIsFollowing, followerCount, heroBgUrl, countryName }) {
  const [following, setFollowing] = useState(viewerIsFollowing)
  const [count, setCount] = useState(followerCount)
  const [loading, setLoading] = useState(false)
  const [hovering, setHovering] = useState(false)

  const uname = user.username || user.name || 'Unknown'
  const displayName = user.name || uname

  const joinDate = user.created_at
    ? new Date(user.created_at).toLocaleDateString('en-US', { month: 'long', year: 'numeric' })
    : null

  const toggleFollow = async () => {
    if (loading) return
    setLoading(true)
    try {
      const res = await fetch(`/@${uname.toLowerCase()}/follow`, {
        method: 'POST',
        headers: {
          'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]')?.content ?? '',
          'Accept': 'application/json',
        },
      })
      if (res.ok) {
        const data = await res.json()
        setFollowing(data.following)
        setCount(data.follower_count)
      }
    } catch (_) {}
    setLoading(false)
  }

  return (
    <div className="relative overflow-hidden border-b border-white/10">
      {/* Cover / hero background */}
      <div
        className="w-full"
        style={{
          height: 'clamp(160px, 22vw, 260px)',
          background: heroBgUrl
            ? `url('${heroBgUrl}') center/cover no-repeat`
            : 'linear-gradient(135deg, #0f1724 0%, #151e2e 50%, #090f1a 100%)',
          position: 'relative',
        }}
      >
        {/* Overlay */}
        <div
          className="absolute inset-0"
          style={{
            background: heroBgUrl
              ? 'linear-gradient(to right, rgba(15,23,36,0.95) 0%, rgba(15,23,36,0.75) 50%, rgba(15,23,36,0.45) 100%)'
              : 'radial-gradient(ellipse at 20% 50%, rgba(77,163,255,.12) 0%, transparent 60%), radial-gradient(ellipse at 80% 20%, rgba(224,122,33,.08) 0%, transparent 50%)',
          }}
        />
        {/* Nebula grain decoration */}
        <div className="absolute inset-0 opacity-[0.06] pointer-events-none" style={{ backgroundImage: 'url(/gfx/noise.png)', backgroundSize: '32px' }} />
      </div>

      {/* Identity block – overlaps cover at bottom */}
      <div className="max-w-6xl mx-auto px-4">
        <div className="relative -mt-16 pb-5 flex flex-col sm:flex-row sm:items-end gap-4">

          {/* Avatar */}
          <div className="shrink-0 z-10">
            <img
              src={user.avatar_url || '/default/avatar_default.webp'}
              alt={`${uname}'s avatar`}
              className="w-24 h-24 sm:w-28 sm:h-28 rounded-2xl object-cover ring-4 ring-[#0f1724] shadow-xl shadow-black/60"
            />
          </div>

          {/* Name + meta */}
          <div className="flex-1 min-w-0 pb-1">
            <h1 className="text-2xl sm:text-3xl font-bold text-white leading-tight">
              {displayName}
            </h1>
            <p className="text-slate-400 text-sm mt-0.5 font-mono">@{uname}</p>
            <div className="flex flex-wrap items-center gap-3 mt-2 text-xs text-slate-500">
              {countryName && (
                <span className="flex items-center gap-1.5">
                  {profile?.country_code && (
                    <img
                      src={`/gfx/flags/shiny/24/${encodeURIComponent(profile.country_code)}.png`}
                      alt={countryName}
                      className="w-4 h-auto rounded-sm"
                      onError={(e) => { e.target.style.display = 'none' }}
                    />
                  )}
                  {countryName}
                </span>
              )}
              {joinDate && (
                <span className="flex items-center gap-1">
                  <i className="fa-solid fa-calendar-days fa-fw opacity-60" />
                  Joined {joinDate}
                </span>
              )}
              {profile?.website && (
                <a
                  href={profile.website.startsWith('http') ? profile.website : `https://${profile.website}`}
                  target="_blank"
                  rel="nofollow noopener noreferrer"
                  className="flex items-center gap-1 text-sky-400 hover:text-sky-300 transition-colors"
                >
                  <i className="fa-solid fa-link fa-fw" />
                  {(() => {
                    try {
                      const url = profile.website.startsWith('http') ? profile.website : `https://${profile.website}`
                      return new URL(url).hostname
                    } catch {
                      return profile.website
                    }
                  })()}
                </a>
              )}
            </div>
          </div>

          {/* Action buttons */}
          <div className="shrink-0 flex items-center gap-2 pb-1">
            {isOwner ? (
              <>
                <a
                  href="/dashboard/profile"
                  className="inline-flex items-center gap-2 px-4 py-2 rounded-xl text-sm font-medium border border-white/15 text-slate-300 hover:text-white hover:bg-white/5 transition-all"
                  aria-label="Edit profile"
                >
                  <i className="fa-solid fa-pen fa-fw" />
                  <span className="hidden sm:inline">Edit Profile</span>
                </a>
                <a
                  href="/studio"
                  className="inline-flex items-center gap-2 px-4 py-2 rounded-xl text-sm font-medium bg-sky-600 hover:bg-sky-500 text-white transition-all shadow-lg shadow-sky-900/30"
                  aria-label="Open Studio"
                >
                  <i className="fa-solid fa-wand-magic-sparkles fa-fw" />
                  <span className="hidden sm:inline">Studio</span>
                </a>
              </>
            ) : (
              <>
                {/* Follow button */}
                <button
                  onClick={toggleFollow}
                  onMouseEnter={() => setHovering(true)}
                  onMouseLeave={() => setHovering(false)}
                  disabled={loading}
                  aria-label={following ? 'Unfollow' : 'Follow'}
                  className={`inline-flex items-center gap-2 px-4 py-2 rounded-xl text-sm font-medium border transition-all ${
                    following
                      ? hovering
                        ? 'bg-red-500/10 border-red-400/40 text-red-400'
                        : 'bg-green-500/10 border-green-400/40 text-green-400'
                      : 'bg-sky-500/10 border-sky-400/40 text-sky-400 hover:bg-sky-500/20'
                  }`}
                >
                  <i className={`fa-solid fa-fw ${
                    loading
                      ? 'fa-circle-notch fa-spin'
                      : following
                        ? hovering ? 'fa-user-minus' : 'fa-user-check'
                        : 'fa-user-plus'
                  }`} />
                  <span>{following ? (hovering ? 'Unfollow' : 'Following') : 'Follow'}</span>
                  <span className="text-xs opacity-60">({count.toLocaleString()})</span>
                </button>
                {/* Share */}
                <button
                  onClick={() => {
                    if (navigator.share) {
                      navigator.share({ title: `${displayName} on Skinbase`, url: window.location.href })
                    } else {
                      navigator.clipboard.writeText(window.location.href)
                    }
                  }}
                  aria-label="Share profile"
                  className="p-2.5 rounded-xl border border-white/10 text-slate-400 hover:text-white hover:bg-white/5 transition-all"
                >
                  <i className="fa-solid fa-share-nodes fa-fw" />
                </button>
              </>
            )}
          </div>

        </div>
      </div>
    </div>
  )
}
