'use client'

import { useState } from 'react'
import { useTranslations } from 'next-intl'
import { useRouter } from '@/i18n/navigation'
import type { AdminCategory, AdminForum } from '@/lib/admin-forum'

type Group = { category: AdminCategory; forums: AdminForum[] }
type ForumFields = {
  name: string
  description: string
  icon: string
  colortitle: string
  type: string
  order: string
}

const EMPTY_FORUM: ForumFields = { name: '', description: '', icon: '', colortitle: '', type: '0', order: '0' }

export function AdminForumManager({ initial }: { initial: Group[] }) {
  const t = useTranslations('Admin')
  const router = useRouter()
  const [busy, setBusy] = useState(false)
  const [catForm, setCatForm] = useState({ name: '', order: '0' })
  const [forumForm, setForumForm] = useState<Record<number, ForumFields>>({})
  const [editCat, setEditCat] = useState<{ id: number; name: string; order: string } | null>(null)
  const [editForum, setEditForum] = useState<(ForumFields & { id: number }) | null>(null)

  const ff = (catId: number) => forumForm[catId] ?? EMPTY_FORUM
  const setFF = (catId: number, patch: Partial<ForumFields>) =>
    setForumForm((s) => ({ ...s, [catId]: { ...ff(catId), ...patch } }))

  async function call(url: string, method: string, body?: unknown): Promise<boolean> {
    setBusy(true)
    try {
      const res = await fetch(url, {
        method,
        headers: body ? { 'Content-Type': 'application/json' } : undefined,
        credentials: 'same-origin',
        body: body ? JSON.stringify(body) : undefined,
      })
      const d = await res.json()
      if (d.success) {
        router.refresh()
        return true
      }
      if (d.error === 'categoryNotEmpty') alert(t('categoryNotEmpty'))
      else if (d.error === 'forumNotEmpty') alert(t('forumNotEmpty'))
      return false
    } finally {
      setBusy(false)
    }
  }

  const forumBody = (v: ForumFields, category: number) => ({
    category,
    name: v.name,
    description: v.description,
    icon: v.icon,
    colortitle: v.colortitle,
    type: Number(v.type),
    order: Number(v.order),
  })

  function ForumEditFields({
    v,
    onChange,
  }: {
    v: ForumFields
    onChange: (patch: Partial<ForumFields>) => void
  }) {
    return (
      <>
        <input value={v.name} onChange={(e) => onChange({ name: e.target.value })} placeholder={t('forumName')} maxLength={45} />
        <input value={v.description} onChange={(e) => onChange({ description: e.target.value })} placeholder={t('forumDescription')} />
        <select value={v.type} onChange={(e) => onChange({ type: e.target.value })}>
          <option value="0">{t('forumTypeNormal')}</option>
          <option value="1">{t('forumTypeClass')}</option>
          <option value="2">{t('forumTypeFlag')}</option>
        </select>
        <input value={v.icon} onChange={(e) => onChange({ icon: e.target.value })} placeholder={t('forumIcon')} />
        <input value={v.colortitle} onChange={(e) => onChange({ colortitle: e.target.value })} placeholder={t('forumColor')} />
        <input type="number" value={v.order} onChange={(e) => onChange({ order: e.target.value })} placeholder={t('order')} />
      </>
    )
  }

  return (
    <div>
      {/* Alta de categoría */}
      <form
        onSubmit={(e) => {
          e.preventDefault()
          if (catForm.name.trim())
            call('/api/admin/forum/category', 'POST', { name: catForm.name, order: Number(catForm.order) }).then(
              (ok) => ok && setCatForm({ name: '', order: '0' }),
            )
        }}
        className="admin-form info-box-light separate2"
      >
        <span className="second-brown">{t('newCategory')}</span>
        <input value={catForm.name} onChange={(e) => setCatForm({ ...catForm, name: e.target.value })} placeholder={t('categoryName')} maxLength={45} />
        <span className="second-brown">{t('order')}</span>
        <input type="number" value={catForm.order} onChange={(e) => setCatForm({ ...catForm, order: e.target.value })} />
        <button type="submit" disabled={busy}>{t('create')}</button>
      </form>
      <br />

      {initial.length === 0 && <p className="second-brown centered">{t('noCategories')}</p>}

      {initial.map(({ category, forums }) => (
        <div key={category.id} className="inline-div" style={{ display: 'block' }}>
          {editCat?.id === category.id ? (
            <div className="admin-form separate2">
              <input value={editCat.name} onChange={(e) => setEditCat({ ...editCat, name: e.target.value })} placeholder={t('categoryName')} maxLength={45} />
              <input type="number" value={editCat.order} onChange={(e) => setEditCat({ ...editCat, order: e.target.value })} />
              <button
                onClick={() =>
                  editCat.name.trim() &&
                  call(`/api/admin/forum/category/${category.id}`, 'PUT', { name: editCat.name, order: Number(editCat.order) }).then((ok) => ok && setEditCat(null))
                }
                disabled={busy}
                className="ns-tool-btn"
              >
                {t('save')}
              </button>{' '}
              <button onClick={() => setEditCat(null)} className="ns-tool-btn">{t('cancel')}</button>
            </div>
          ) : (
            <div className="title-content-h3">
              <h3 className="big-font">
                {category.name} <span className="third-brown small-font">#{category.order}</span>{' '}
                <button
                  onClick={() => setEditCat({ id: category.id, name: category.name, order: String(category.order) })}
                  disabled={busy}
                  className="ns-tool-btn"
                >
                  {t('edit')}
                </button>{' '}
                <button
                  onClick={() => confirm(t('confirmDelete')) && call(`/api/admin/forum/category/${category.id}`, 'DELETE')}
                  disabled={busy}
                  className="ns-tool-btn red-info2"
                >
                  {t('delete')}
                </button>
              </h3>
            </div>
          )}

          <table className="max-center-table">
            <tbody>
              {forums.length === 0 && (
                <tr>
                  <td className="second-brown centered">{t('noForums')}</td>
                </tr>
              )}
              {forums.map((f) =>
                editForum?.id === f.id ? (
                  <tr key={f.id} className="team-center-table-tr">
                    <td className="lefted separate" colSpan={2}>
                      <ForumEditFields v={editForum} onChange={(patch) => setEditForum({ ...editForum, ...patch })} />
                      <button
                        onClick={() =>
                          editForum.name.trim() &&
                          call(`/api/admin/forum/${f.id}`, 'PUT', forumBody(editForum, category.id)).then((ok) => ok && setEditForum(null))
                        }
                        disabled={busy}
                        className="ns-tool-btn"
                      >
                        {t('save')}
                      </button>{' '}
                      <button onClick={() => setEditForum(null)} className="ns-tool-btn">{t('cancel')}</button>
                    </td>
                  </tr>
                ) : (
                  <tr key={f.id} className="team-center-table-tr">
                    <td className="lefted separate">
                      <span className="yellow-info">{f.name}</span>{' '}
                      <span className="third-brown small-font">
                        · {t('forumType')}: {f.type} · #{f.order}
                      </span>
                      {f.description && <p className="third-brown small-font">{f.description}</p>}
                    </td>
                    <td className="real-info-box no-wrap-td">
                      <button
                        onClick={() =>
                          setEditForum({
                            id: f.id,
                            name: f.name,
                            description: f.description,
                            icon: f.icon ?? '',
                            colortitle: f.colortitle ?? '',
                            type: String(f.type),
                            order: String(f.order),
                          })
                        }
                        disabled={busy}
                        className="ns-tool-btn"
                      >
                        {t('edit')}
                      </button>{' '}
                      <button
                        onClick={() => confirm(t('confirmDelete')) && call(`/api/admin/forum/${f.id}`, 'DELETE')}
                        disabled={busy}
                        className="ns-tool-btn red-info2"
                      >
                        {t('delete')}
                      </button>
                    </td>
                  </tr>
                ),
              )}
            </tbody>
          </table>

          {/* Alta de foro en esta categoría */}
          <form
            onSubmit={(e) => {
              e.preventDefault()
              const v = ff(category.id)
              if (v.name.trim())
                call('/api/admin/forum', 'POST', forumBody(v, category.id)).then(
                  (ok) => ok && setFF(category.id, EMPTY_FORUM),
                )
            }}
            className="admin-form separate"
          >
            <ForumEditFields v={ff(category.id)} onChange={(patch) => setFF(category.id, patch)} />
            <button type="submit" disabled={busy}>{t('addForum')}</button>
          </form>
        </div>
      ))}
    </div>
  )
}