import { useState } from 'react'
import { ImageUploadField } from './ImageUploadField'
import { publishSeries } from '@/lib/articleMutations'
import { useNostrAuth } from '@/hooks/useNostrAuth'
import { nostrService } from '@/lib/nostr'
import { t } from '@/lib/i18n'
import type { ArticleDraft } from '@/lib/articlePublisherTypes'

interface CreateSeriesModalProps {
  isOpen: boolean
  onClose: () => void
  onSuccess: () => void
  authorPubkey: string
}

interface SeriesDraft {
  title: string
  description: string
  preview: string
  coverUrl: string
  category: ArticleDraft['category']
}

export function CreateSeriesModal({ isOpen, onClose, onSuccess, authorPubkey }: CreateSeriesModalProps): React.ReactElement | null {
  const { pubkey, isUnlocked } = useNostrAuth()
  const [draft, setDraft] = useState<SeriesDraft>({
    title: '',
    description: '',
    preview: '',
    coverUrl: '',
    category: 'science-fiction',
  })
  const [loading, setLoading] = useState(false)
  const [error, setError] = useState<string | null>(null)

  if (!isOpen) {
    return null
  }

  const privateKey = nostrService.getPrivateKey()
  const canPublish = pubkey === authorPubkey && isUnlocked && privateKey !== null

  const handleSubmit = async (e: React.FormEvent): Promise<void> => {
    e.preventDefault()
    if (!canPublish) {
      setError(t('series.create.error.notAuthor'))
      return
    }

    if (!draft.title.trim() || !draft.description.trim() || !draft.preview.trim()) {
      setError(t('series.create.error.missingFields'))
      return
    }

    setLoading(true)
    setError(null)

    try {
      if (!privateKey) {
        setError(t('series.create.error.notAuthor'))
        return
      }
      await publishSeries({
        title: draft.title,
        description: draft.description,
        preview: draft.preview,
        ...(draft.coverUrl ? { coverUrl: draft.coverUrl } : {}),
        category: draft.category,
        authorPubkey,
        authorPrivateKey: privateKey,
      })
      // Reset form
      setDraft({
        title: '',
        description: '',
        preview: '',
        coverUrl: '',
        category: 'science-fiction',
      })
      onSuccess()
      onClose()
    } catch (submitError) {
      setError(submitError instanceof Error ? submitError.message : t('series.create.error.publishFailed'))
    } finally {
      setLoading(false)
    }
  }

  const handleClose = (): void => {
    if (!loading) {
      setDraft({
        title: '',
        description: '',
        preview: '',
        coverUrl: '',
        category: 'science-fiction',
      })
      setError(null)
      onClose()
    }
  }

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/50 backdrop-blur-sm">
      <div className="bg-cyber-dark border border-neon-cyan/30 rounded-lg p-6 max-w-2xl w-full mx-4 max-h-[90vh] overflow-y-auto">
        <div className="flex items-center justify-between mb-6">
          <h2 className="text-2xl font-semibold text-neon-cyan">{t('series.create.title')}</h2>
          <button
            type="button"
            onClick={handleClose}
            disabled={loading}
            className="text-cyber-accent hover:text-neon-cyan transition-colors disabled:opacity-50"
          >
            ✕
          </button>
        </div>

        {!canPublish && (
          <div className="mb-4 p-4 bg-yellow-900/30 border border-yellow-500/50 rounded text-yellow-300">
            <p>{t('series.create.error.notAuthor')}</p>
          </div>
        )}

        <form onSubmit={(e) => {
          void handleSubmit(e)
        }} className="space-y-4">
          <div>
            <label htmlFor="series-title" className="block text-sm font-medium text-neon-cyan mb-2">
              {t('series.create.field.title')}
            </label>
            <input
              id="series-title"
              type="text"
              value={draft.title}
              onChange={(e) => setDraft({ ...draft, title: e.target.value })}
              className="w-full px-3 py-2 bg-cyber-darker border border-cyber-accent/30 rounded text-cyber-light focus:border-neon-cyan focus:outline-none"
              required
              disabled={loading || !canPublish}
            />
          </div>

          <div>
            <label htmlFor="series-description" className="block text-sm font-medium text-neon-cyan mb-2">
              {t('series.create.field.description')}
            </label>
            <textarea
              id="series-description"
              value={draft.description}
              onChange={(e) => setDraft({ ...draft, description: e.target.value })}
              rows={4}
              className="w-full px-3 py-2 bg-cyber-darker border border-cyber-accent/30 rounded text-cyber-light focus:border-neon-cyan focus:outline-none"
              required
              disabled={loading || !canPublish}
            />
          </div>

          <div>
            <label htmlFor="series-preview" className="block text-sm font-medium text-neon-cyan mb-2">
              {t('series.create.field.preview')}
            </label>
            <textarea
              id="series-preview"
              value={draft.preview}
              onChange={(e) => setDraft({ ...draft, preview: e.target.value })}
              rows={3}
              className="w-full px-3 py-2 bg-cyber-darker border border-cyber-accent/30 rounded text-cyber-light focus:border-neon-cyan focus:outline-none"
              required
              disabled={loading || !canPublish}
            />
            <p className="text-xs text-cyber-accent/70 mt-1">{t('series.create.field.preview.help')}</p>
          </div>

          <div>
            <label htmlFor="series-category" className="block text-sm font-medium text-neon-cyan mb-2">
              {t('series.create.field.category')}
            </label>
            <select
              id="series-category"
              value={draft.category}
              onChange={(e) => setDraft({ ...draft, category: e.target.value as ArticleDraft['category'] })}
              className="w-full px-3 py-2 bg-cyber-darker border border-cyber-accent/30 rounded text-cyber-light focus:border-neon-cyan focus:outline-none"
              required
              disabled={loading || !canPublish}
            >
              <option value="science-fiction">{t('category.science-fiction')}</option>
              <option value="scientific-research">{t('category.scientific-research')}</option>
            </select>
          </div>

          <div>
            <ImageUploadField
              id="series-cover"
              label={t('series.create.field.cover')}
              value={draft.coverUrl}
              onChange={(url) => setDraft({ ...draft, coverUrl: url })}
              helpText={t('series.create.field.cover.help')}
            />
          </div>

          {error && (
            <div className="p-4 bg-red-900/30 border border-red-500/50 rounded text-red-300">
              <p>{error}</p>
            </div>
          )}

          <div className="flex items-center justify-end gap-4 pt-4">
            <button
              type="button"
              onClick={handleClose}
              disabled={loading}
              className="px-4 py-2 bg-cyber-darker border border-cyber-accent/30 rounded text-cyber-light hover:border-neon-cyan transition-colors disabled:opacity-50"
            >
              {t('common.cancel')}
            </button>
            <button
              type="submit"
              disabled={loading || !canPublish}
              className="px-4 py-2 bg-neon-cyan/20 hover:bg-neon-cyan/30 text-neon-cyan rounded-lg font-medium transition-all border border-neon-cyan/50 hover:shadow-glow-cyan disabled:opacity-50 disabled:cursor-not-allowed"
            >
              {loading ? t('common.loading') : t('series.create.submit')}
            </button>
          </div>
        </form>
      </div>
    </div>
  )
}