// CreateCollectionModal.jsx — §22 S2 endpoint, §22 S4 UI. The create-collection
// form the project directory's "Create your first collection" / "New
// collection" control opens. S2 shipped the POST
// /api/projects/:id/collections endpoint but left it UI-less; S4 surfaces it,
// gated on the viewer's `can_create_collection` capability.
//
// The form lets the Owner choose an id (a slug, not "default"), a type, an
// optional display name, and an optional visibility (defaulting to the
// project's). The backend commits a `.collection.yaml`, re-mirrors the
// registry, and returns the new collection; on success the caller refreshes
// the directory.

import { useState } from 'react'
import { createCollection } from '../api'

const TYPE_OPTIONS = [
  { value: 'document', label: 'Document — prose RFCs' },
  { value: 'specification', label: 'Specification' },
  { value: 'bdd', label: 'BDD — behaviour scenarios' },
]

const VISIBILITY_OPTIONS = [
  { value: '', label: 'Inherit from project' },
  { value: 'public', label: 'Public' },
  { value: 'unlisted', label: 'Unlisted (link-only)' },
  { value: 'gated', label: 'Gated (hidden from the public)' },
]

export default function CreateCollectionModal({ projectId, onClose, onCreated }) {
  const [collectionId, setCollectionId] = useState('')
  const [type, setType] = useState('document')
  const [name, setName] = useState('')
  const [visibility, setVisibility] = useState('')
  const [submitting, setSubmitting] = useState(false)
  const [error, setError] = useState(null)

  async function handleCreate(e) {
    e.preventDefault()
    const cid = collectionId.trim().toLowerCase()
    if (!cid) return
    setSubmitting(true)
    setError(null)
    try {
      const col = await createCollection(projectId, {
        collectionId: cid,
        type,
        name: name.trim() || null,
        visibility: visibility || null,
      })
      onCreated?.(col)
    } catch (err) {
      setError(err.message || 'Failed to create the collection.')
    } finally {
      setSubmitting(false)
    }
  }

  return (
    <div className="modal-overlay" onClick={e => { if (e.target === e.currentTarget) onClose() }}>
      <div className="modal" style={{ maxWidth: 560 }}>
        <div className="modal-header">
          <h2>New collection</h2>
          <button className="modal-close" onClick={onClose}>×</button>
        </div>
        <div className="modal-body">
          <form onSubmit={handleCreate} className="invitations-form">
            <label htmlFor="col-id">Collection id</label>
            <input
              id="col-id"
              value={collectionId}
              onChange={e => setCollectionId(e.target.value)}
              placeholder="e.g. model, features"
              autoFocus
              required
            />
            <label htmlFor="col-type" style={{ marginTop: 10 }}>Type</label>
            <select id="col-type" value={type} onChange={e => setType(e.target.value)}>
              {TYPE_OPTIONS.map(o => <option key={o.value} value={o.value}>{o.label}</option>)}
            </select>
            <label htmlFor="col-name" style={{ marginTop: 10 }}>Display name (optional)</label>
            <input
              id="col-name"
              value={name}
              onChange={e => setName(e.target.value)}
              placeholder="e.g. The Model"
            />
            <label htmlFor="col-vis" style={{ marginTop: 10 }}>Visibility</label>
            <select id="col-vis" value={visibility} onChange={e => setVisibility(e.target.value)}>
              {VISIBILITY_OPTIONS.map(o => <option key={o.value} value={o.value}>{o.label}</option>)}
            </select>
            <div style={{ marginTop: 12, display: 'flex', gap: 8, alignItems: 'center' }}>
              <button type="submit" className="btn-primary" disabled={submitting}>
                {submitting ? 'Creating…' : 'Create collection'}
              </button>
              {error && <span style={{ color: '#c33' }}>{error}</span>}
            </div>
          </form>
        </div>
        <div className="modal-footer">
          <button type="button" className="btn-link" onClick={onClose}>Close</button>
        </div>
      </div>
    </div>
  )
}