import React, { useMemo, useRef, useState } from 'react'
import { router, usePage } from '@inertiajs/react'
import StudioLayout from '../../Layouts/StudioLayout'
import GroupStudioPromoCard from '../../components/groups/GroupStudioPromoCard'
import NovaSelect from '../../components/ui/NovaSelect'

function slugifyGroupValue(value) {
  return String(value || '')
    .normalize('NFKD')
    .replace(/[\u0300-\u036f]/g, '')
    .toLowerCase()
    .replace(/[^a-z0-9]+/g, '-')
    .replace(/^-+|-+$/g, '')
    .slice(0, 90)
}

function resolveMediaPreviewUrl(path, filesCdnUrl) {
  const trimmed = String(path || '').trim()

  if (!trimmed) {
    return ''
  }

  if (trimmed.startsWith('blob:') || trimmed.startsWith('data:') || trimmed.startsWith('http://') || trimmed.startsWith('https://')) {
    return trimmed
  }

  return `${String(filesCdnUrl || '').replace(/\/$/, '')}/${trimmed.replace(/^\/+/, '')}`
}

export default function StudioGroupCreate() {
  const { props } = usePage()
  const filesCdnUrl = props?.cdn?.files_url || ''
  const avatarInputRef = useRef(null)
  const bannerInputRef = useRef(null)
  const [slugManuallyEdited, setSlugManuallyEdited] = useState(false)
  const [form, setForm] = useState({
    name: '',
    slug: '',
    headline: '',
    bio: '',
    type: '',
    founded_at: '',
    avatar_path: '',
    banner_path: '',
    visibility: 'public',
    membership_policy: 'invite_only',
    website_url: '',
    links_json: [{ label: '', url: '' }],
    avatar_file: null,
    banner_file: null,
  })
  const [avatarPreview, setAvatarPreview] = useState('')
  const [bannerPreview, setBannerPreview] = useState('')
  const resolvedAvatarPreview = useMemo(() => avatarPreview || resolveMediaPreviewUrl(form.avatar_path, filesCdnUrl), [avatarPreview, form.avatar_path, filesCdnUrl])
  const resolvedBannerPreview = useMemo(() => bannerPreview || resolveMediaPreviewUrl(form.banner_path, filesCdnUrl), [bannerPreview, form.banner_path, filesCdnUrl])

  const updateLink = (index, key, value) => {
    setForm((current) => ({
      ...current,
      links_json: current.links_json.map((item, itemIndex) => itemIndex === index ? { ...item, [key]: value } : item),
    }))
  }

  const addLink = () => {
    setForm((current) => ({
      ...current,
      links_json: [...current.links_json, { label: '', url: '' }],
    }))
  }

  const removeLink = (index) => {
    setForm((current) => ({
      ...current,
      links_json: current.links_json.filter((_, itemIndex) => itemIndex !== index),
    }))
  }

  const submit = () => {
    router.post(props.endpoints?.store, {
      ...form,
      links_json: form.links_json.filter((item) => item.label.trim() !== '' || item.url.trim() !== ''),
    }, {
      forceFormData: true,
    })
  }

  const handleFileSelected = (field, setPreview) => (event) => {
    const file = event.target.files?.[0] || null

    setForm((current) => ({ ...current, [field]: file }))
    setPreview(file ? URL.createObjectURL(file) : '')
  }

  const clearSelectedFile = (field, setPreview, inputRef) => {
    setForm((current) => ({ ...current, [field]: null }))
    setPreview('')

    if (inputRef.current) {
      inputRef.current.value = ''
    }
  }

  const handleNameChange = (event) => {
    const nextName = event.target.value

    setForm((current) => ({
      ...current,
      name: nextName,
      slug: slugManuallyEdited ? current.slug : slugifyGroupValue(nextName),
    }))
  }

  const handleSlugChange = (event) => {
    const nextSlug = slugifyGroupValue(event.target.value)

    setSlugManuallyEdited(nextSlug !== '')
    setForm((current) => ({ ...current, slug: nextSlug }))
  }

  return (
    <StudioLayout title={props.title} subtitle={props.description}>
      <div className="mx-auto mb-6 max-w-5xl">
        <GroupStudioPromoCard
          title="Set up the public identity before the first release"
          description="A strong group page makes collaborative publishing legible: who leads the team, what kind of work you make, and why contributors should join or follow."
          bullets={[
            { title: 'Headline first', body: 'Use the headline to explain what the collective publishes and what makes the group distinct.' },
            { title: 'Recruit with clarity', body: 'After creation, configure recruitment so open roles surface across search and browse experiences.' },
            { title: 'Own the presentation', body: 'Avatar, cover art, and links shape how the group appears on artworks, profile summaries, and leaderboards.' },
          ]}
          primaryLabel="Back to groups"
          primaryHref="/studio/groups"
          secondaryLabel="Browse public groups"
          secondaryHref="/groups"
        />
      </div>

      <section className="mx-auto max-w-3xl rounded-[30px] border border-white/10 bg-white/[0.03] p-6">
        <div className="grid gap-5">
          <label className="grid gap-2 text-sm text-slate-200">
            <span>Name</span>
            <input value={form.name} onChange={handleNameChange} className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
          </label>
          <label className="grid gap-2 text-sm text-slate-200">
            <span>Slug</span>
            <input value={form.slug} onChange={handleSlugChange} className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
          </label>
          <label className="grid gap-2 text-sm text-slate-200">
            <span>Short description</span>
            <input value={form.headline} onChange={(event) => setForm((current) => ({ ...current, headline: event.target.value }))} className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
          </label>
          <label className="grid gap-2 text-sm text-slate-200">
            <span>About</span>
            <textarea value={form.bio} onChange={(event) => setForm((current) => ({ ...current, bio: event.target.value }))} rows={6} className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
          </label>
          <div className="grid gap-5 md:grid-cols-2">
            <label className="grid gap-2 text-sm text-slate-200">
              <span>Type / category</span>
              <input value={form.type} onChange={(event) => setForm((current) => ({ ...current, type: event.target.value }))} className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
            </label>
            <label className="grid gap-2 text-sm text-slate-200">
              <span>Founded date</span>
              <input type="date" value={form.founded_at} onChange={(event) => setForm((current) => ({ ...current, founded_at: event.target.value }))} className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
            </label>
          </div>
          <label className="grid gap-2 text-sm text-slate-200">
            <span>Website</span>
            <input value={form.website_url} onChange={(event) => setForm((current) => ({ ...current, website_url: event.target.value }))} className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
          </label>
          <div className="grid gap-5 md:grid-cols-2">
            <div className="grid gap-3 rounded-[24px] border border-white/10 bg-black/20 p-4 text-sm text-slate-200">
              <span className="text-sm font-semibold text-white">Avatar / logo</span>
              <div className="flex h-28 w-28 items-center justify-center overflow-hidden rounded-[24px] border border-white/10 bg-white/[0.04]">
                {resolvedAvatarPreview ? <img src={resolvedAvatarPreview} alt="Avatar preview" className="h-full w-full object-cover" /> : <i className="fa-solid fa-image text-slate-500" />}
              </div>
              <input ref={avatarInputRef} type="file" accept="image/png,image/jpeg,image/webp" onChange={handleFileSelected('avatar_file', setAvatarPreview)} className="hidden" />
              <div className="flex flex-wrap gap-2">
                <button type="button" onClick={() => avatarInputRef.current?.click()} className="rounded-full border border-white/10 bg-white/[0.04] px-4 py-2 text-sm font-semibold text-white">Upload avatar</button>
                {form.avatar_file ? <button type="button" onClick={() => clearSelectedFile('avatar_file', setAvatarPreview, avatarInputRef)} className="rounded-full border border-white/10 bg-transparent px-4 py-2 text-sm font-semibold text-slate-300">Use URL instead</button> : null}
              </div>
              <label className="grid gap-2 text-sm text-slate-200">
                <span>Or paste an image URL</span>
                <input value={form.avatar_path} onChange={(event) => setForm((current) => ({ ...current, avatar_path: event.target.value }))} placeholder="https://" className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
              </label>
            </div>
            <div className="grid gap-3 rounded-[24px] border border-white/10 bg-black/20 p-4 text-sm text-slate-200">
              <span className="text-sm font-semibold text-white">Cover image</span>
              <div className="flex h-28 w-full items-center justify-center overflow-hidden rounded-[24px] border border-white/10 bg-white/[0.04]">
                {resolvedBannerPreview ? <img src={resolvedBannerPreview} alt="Cover preview" className="h-full w-full object-cover" /> : <i className="fa-solid fa-panorama text-slate-500" />}
              </div>
              <input ref={bannerInputRef} type="file" accept="image/png,image/jpeg,image/webp" onChange={handleFileSelected('banner_file', setBannerPreview)} className="hidden" />
              <div className="flex flex-wrap gap-2">
                <button type="button" onClick={() => bannerInputRef.current?.click()} className="rounded-full border border-white/10 bg-white/[0.04] px-4 py-2 text-sm font-semibold text-white">Upload cover</button>
                {form.banner_file ? <button type="button" onClick={() => clearSelectedFile('banner_file', setBannerPreview, bannerInputRef)} className="rounded-full border border-white/10 bg-transparent px-4 py-2 text-sm font-semibold text-slate-300">Use URL instead</button> : null}
              </div>
              <label className="grid gap-2 text-sm text-slate-200">
                <span>Or paste an image URL</span>
                <input value={form.banner_path} onChange={(event) => setForm((current) => ({ ...current, banner_path: event.target.value }))} placeholder="https://" className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
              </label>
            </div>
          </div>
          <div className="grid gap-2 text-sm text-slate-200">
            <span>Visibility</span>
            <NovaSelect value={form.visibility} onChange={(val) => setForm((current) => ({ ...current, visibility: val }))} options={props.visibilityOptions || []} searchable={false} />
          </div>
          <div className="grid gap-2 text-sm text-slate-200">
            <span>Membership policy</span>
            <NovaSelect value={form.membership_policy} onChange={(val) => setForm((current) => ({ ...current, membership_policy: val }))} options={props.membershipPolicyOptions || []} searchable={false} />
          </div>
          <div className="grid gap-3">
            <div className="flex items-center justify-between gap-3">
              <span className="text-sm text-slate-200">Links</span>
              <button type="button" onClick={addLink} className="rounded-full border border-white/10 bg-white/[0.04] px-3 py-1.5 text-xs font-semibold text-white">Add link</button>
            </div>
            {form.links_json.map((item, index) => (
              <div key={`link-${index}`} className="grid gap-3 md:grid-cols-[0.8fr_1.2fr_auto]">
                <input value={item.label} onChange={(event) => updateLink(index, 'label', event.target.value)} placeholder="Label" className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
                <input value={item.url} onChange={(event) => updateLink(index, 'url', event.target.value)} placeholder="https://" className="rounded-2xl border border-white/10 bg-black/20 px-4 py-3 text-white outline-none" />
                <button type="button" onClick={() => removeLink(index)} className="rounded-full border border-rose-300/20 bg-rose-400/10 px-4 py-2 text-sm font-semibold text-rose-100">Remove</button>
              </div>
            ))}
          </div>
          <div className="flex justify-end gap-3">
            <a href="/studio/groups" className="rounded-full border border-white/10 bg-white/[0.03] px-4 py-2 text-sm font-semibold text-white">Cancel</a>
            <button type="button" onClick={submit} className="rounded-full border border-sky-300/20 bg-sky-300/10 px-4 py-2 text-sm font-semibold text-sky-100">Create group</button>
          </div>
        </div>
      </section>
    </StudioLayout>
  )
}