import React, { useEffect, useState } from 'react'
import { useNavigate, useParams } from 'react-router-dom'
import api, { buildExerciseApiPayload } from '../utils/api'
import RichTextEditor from '../components/RichTextEditor'

const INTENSITY_OPTIONS = [
  { value: '', label: '—' },
  { value: 'niedrig', label: 'niedrig' },
  { value: 'mittel', label: 'mittel' },
  { value: 'hoch', label: 'hoch' },
]

const LEVEL_OPTIONS = [
  { value: '', label: '—' },
  { value: 'einsteiger', label: 'Einsteiger' },
  { value: 'grundlagen', label: 'Grundlagen' },
  { value: 'aufbau', label: 'Aufbau' },
  { value: 'fortgeschritten', label: 'Fortgeschritten' },
  { value: 'experte', label: 'Experte' },
]

function emptyForm() {
  return {
    title: '',
    summary: '',
    goal: '',
    execution: '',
    preparation: '',
    trainer_notes: '',
    equipmentLines: '',
    duration_min: '',
    duration_max: '',
    group_size_min: '',
    group_size_max: '',
    focus_areas_multi: [],
    training_styles_multi: [],
    training_types_multi: [],
    target_groups_multi: [],
    visibility: 'private',
    status: 'draft',
    skills: [],
  }
}

function detailToForm(exercise) {
  return {
    title: exercise.title || '',
    summary: exercise.summary || '',
    goal: exercise.goal || '',
    execution: exercise.execution || '',
    preparation: exercise.preparation || '',
    trainer_notes: exercise.trainer_notes || '',
    equipmentLines: (exercise.equipment || []).join('\n'),
    duration_min: exercise.duration_min ?? '',
    duration_max: exercise.duration_max ?? '',
    group_size_min: exercise.group_size_min ?? '',
    group_size_max: exercise.group_size_max ?? '',
    focus_areas_multi: (exercise.focus_areas || []).map((f) => ({
      focus_area_id: f.focus_area_id,
      is_primary: !!f.is_primary,
    })),
    training_styles_multi: (exercise.training_styles || []).map((t) => ({
      training_style_id: t.training_style_id,
      is_primary: !!t.is_primary,
    })),
    training_types_multi: (exercise.training_types || []).map((t) => ({
      training_type_id: t.training_type_id,
      is_primary: !!t.is_primary,
    })),
    target_groups_multi: (exercise.target_groups || []).map((g) => ({
      target_group_id: g.target_group_id,
      is_primary: !!g.is_primary,
    })),
    visibility: exercise.visibility || 'private',
    status: exercise.status || 'draft',
    skills:
      exercise.skills?.map((s) => ({
        skill_id: s.skill_id,
        is_primary: s.is_primary || false,
        intensity: s.intensity || '',
        required_level: s.required_level || '',
        target_level: s.target_level || '',
      })) || [],
  }
}

function MultiAssocBlock({ title, rows, setRows, options, idKey, emptyLabel }) {
  const setPrimary = (idx) => {
    setRows(rows.map((r, i) => ({ ...r, is_primary: i === idx })))
  }
  const updateRow = (idx, patch) => {
    const next = rows.map((r, i) => (i === idx ? { ...r, ...patch } : r))
    if (patch.is_primary === true) {
      next.forEach((r, i) => {
        if (i !== idx) r.is_primary = false
      })
    }
    setRows(next)
  }
  const addRow = () => setRows([...rows, { [idKey]: '', is_primary: rows.length === 0 }])
  const removeRow = (idx) => {
    const next = rows.filter((_, i) => i !== idx)
    if (next.length && !next.some((r) => r.is_primary)) next[0].is_primary = true
    setRows(next)
  }

  return (
    <div className="multi-assoc-block">
      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', gap: '8px' }}>
        <h3>{title}</h3>
        <button type="button" className="btn btn-secondary" style={{ fontSize: '12px', padding: '4px 10px' }} onClick={addRow}>
          + Eintrag
        </button>
      </div>
      {rows.length === 0 && (
        <p style={{ fontSize: '13px', color: 'var(--text2)', margin: 0 }}>{emptyLabel}</p>
      )}
      {rows.map((row, idx) => (
        <div key={idx} className="multi-assoc-row">
          <select
            className="form-input"
            value={row[idKey] || ''}
            onChange={(e) => updateRow(idx, { [idKey]: e.target.value ? parseInt(e.target.value, 10) : '' })}
          >
            <option value="">— wählen —</option>
            {options.map((o) => (
              <option key={o.id} value={o.id}>
                {o.icon ? `${o.icon} ` : ''}
                {o.name}
                {o.abbreviation ? ` (${o.abbreviation})` : ''}
              </option>
            ))}
          </select>
          <label style={{ display: 'flex', alignItems: 'center', gap: '4px', fontSize: '13px', whiteSpace: 'nowrap' }}>
            <input
              type="radio"
              name={`primary-${idKey}`}
              checked={!!row.is_primary}
              onChange={() => setPrimary(idx)}
            />
            primär
          </label>
          <button type="button" className="btn" style={{ fontSize: '12px', padding: '4px 8px' }} onClick={() => removeRow(idx)}>
            ✕
          </button>
        </div>
      ))}
    </div>
  )
}

function ExerciseFormPage() {
  const { id: routeId } = useParams()
  const navigate = useNavigate()
  const exerciseId = routeId && !Number.isNaN(parseInt(routeId, 10)) ? parseInt(routeId, 10) : null
  const isEdit = exerciseId != null

  const [formData, setFormData] = useState(emptyForm)
  const [skillsCatalog, setSkillsCatalog] = useState([])
  const [focusAreas, setFocusAreas] = useState([])
  const [styleDirections, setStyleDirections] = useState([])
  const [trainingTypes, setTrainingTypes] = useState([])
  const [targetGroups, setTargetGroups] = useState([])
  const [mediaList, setMediaList] = useState([])
  const [loading, setLoading] = useState(!!isEdit)
  const [saving, setSaving] = useState(false)
  const [skillPick, setSkillPick] = useState('')

  const [mediaFile, setMediaFile] = useState(null)
  const [mediaType, setMediaType] = useState('image')
  const [mediaTitle, setMediaTitle] = useState('')
  const [mediaContext, setMediaContext] = useState('ablauf')
  const [embedUrl, setEmbedUrl] = useState('')
  const [embedTitle, setEmbedTitle] = useState('')

  useEffect(() => {
    let cancelled = false
    const boot = async () => {
      try {
        const [skillsData, faData, sdData, ttData, tgData] = await Promise.all([
          api.listSkills(),
          api.listFocusAreas(),
          api.listTrainingStyles(),
          api.listTrainingTypes(),
          api.listTargetGroups(),
        ])
        if (cancelled) return
        setSkillsCatalog(skillsData)
        setFocusAreas(faData)
        setStyleDirections(sdData)
        setTrainingTypes(ttData)
        setTargetGroups(tgData)
      } catch (e) {
        if (!cancelled) {
          console.error(e)
          alert(
            'Kataloge (Fokus, Stile, Zielgruppen, Fähigkeiten) konnten nicht geladen werden: ' +
              (e.message || e),
          )
        }
      }
    }
    boot()
    return () => {
      cancelled = true
    }
  }, [])

  useEffect(() => {
    if (!isEdit) {
      setFormData(emptyForm())
      setMediaList([])
      setLoading(false)
      return
    }
    let cancelled = false
    const load = async () => {
      setLoading(true)
      try {
        const exercise = await api.getExercise(exerciseId)
        if (cancelled) return
        setFormData(detailToForm(exercise))
        setMediaList(exercise.media || [])
      } catch (err) {
        if (!cancelled) {
          alert(err.message || 'Übung nicht ladbar')
          navigate('/exercises')
        }
      } finally {
        if (!cancelled) setLoading(false)
      }
    }
    load()
    return () => {
      cancelled = true
    }
  }, [isEdit, exerciseId, navigate])

  const updateFormField = (field, value) => {
    setFormData((prev) => ({ ...prev, [field]: value }))
  }

  const addSkillRow = () => {
    const id = skillPick ? parseInt(skillPick, 10) : null
    if (!id) {
      alert('Fähigkeit wählen')
      return
    }
    if (formData.skills.some((s) => s.skill_id === id)) {
      alert('Bereits zugeordnet')
      return
    }
    updateFormField('skills', [
      ...formData.skills,
      {
        skill_id: id,
        is_primary: formData.skills.length === 0,
        intensity: '',
        required_level: '',
        target_level: '',
      },
    ])
    setSkillPick('')
  }

  const setSkillPrimary = (idx) => {
    updateFormField(
      'skills',
      formData.skills.map((s, i) => ({ ...s, is_primary: i === idx })),
    )
  }

  const updateSkillField = (idx, field, value) => {
    updateFormField(
      'skills',
      formData.skills.map((s, i) => (i === idx ? { ...s, [field]: value } : s)),
    )
  }

  const removeSkillRow = (idx) => {
    const next = formData.skills.filter((_, i) => i !== idx)
    if (next.length && !next.some((s) => s.is_primary)) next[0].is_primary = true
    updateFormField('skills', next)
  }

  const handleSubmit = async (e) => {
    e.preventDefault()
    if (!formData.title || formData.title.trim().length < 3) {
      alert('Titel mindestens 3 Zeichen')
      return
    }
    const payloadBase = {
      ...formData,
      equipment:
        typeof formData.equipmentLines === 'string'
          ? formData.equipmentLines
              .split(/[\n,]+/)
              .map((s) => s.trim())
              .filter(Boolean)
          : [],
    }
    let payload
    try {
      payload = buildExerciseApiPayload(payloadBase)
    } catch (err) {
      alert(err.message)
      return
    }
    setSaving(true)
    try {
      if (isEdit) {
        await api.updateExercise(exerciseId, payload)
        const ex = await api.getExercise(exerciseId)
        setMediaList(ex.media || [])
        alert('Gespeichert.')
      } else {
        const created = await api.createExercise(payload)
        navigate(`/exercises/${created.id}/edit`, { replace: true })
      }
    } catch (err) {
      alert('Fehler beim Speichern: ' + err.message)
    } finally {
      setSaving(false)
    }
  }

  const refreshMedia = async () => {
    if (!exerciseId) return
    const ex = await api.getExercise(exerciseId)
    setMediaList(ex.media || [])
  }

  const handleUploadFile = async () => {
    if (!exerciseId || !mediaFile) {
      alert('Datei wählen')
      return
    }
    const fd = new FormData()
    fd.append('file', mediaFile)
    fd.append('media_type', mediaType)
    fd.append('title', mediaTitle)
    fd.append('description', '')
    fd.append('context', mediaContext)
    fd.append('is_primary', 'false')
    try {
      await api.uploadExerciseMedia(exerciseId, fd)
      setMediaFile(null)
      setMediaTitle('')
      await refreshMedia()
    } catch (err) {
      alert('Upload: ' + err.message)
    }
  }

  const handleAddEmbed = async () => {
    if (!exerciseId || !embedUrl.trim()) {
      alert('Embed-URL eingeben')
      return
    }
    const fd = new FormData()
    fd.append('embed_url', embedUrl.trim())
    fd.append('media_type', 'video')
    fd.append('title', embedTitle)
    fd.append('description', '')
    fd.append('context', mediaContext)
    fd.append('is_primary', 'false')
    try {
      await api.uploadExerciseMedia(exerciseId, fd)
      setEmbedUrl('')
      setEmbedTitle('')
      await refreshMedia()
    } catch (err) {
      alert('Embed: ' + err.message)
    }
  }

  const handleDeleteMedia = async (mid) => {
    if (!confirm('Medium löschen?')) return
    try {
      await api.deleteExerciseMedia(exerciseId, mid)
      await refreshMedia()
    } catch (err) {
      alert(err.message)
    }
  }

  const availableSkills = skillsCatalog.filter((s) => !formData.skills.some((x) => x.skill_id === s.id))

  if (loading) {
    return (
      <div style={{ padding: '2rem', textAlign: 'center' }}>
        <div className="spinner"></div>
        <p>Laden...</p>
      </div>
    )
  }

  return (
    <div style={{ padding: '12px', maxWidth: '720px', margin: '0 auto' }}>
      <div style={{ marginBottom: '12px' }}>
        <button type="button" className="btn btn-secondary" onClick={() => navigate('/exercises')}>
          ← Übersicht
        </button>
        {isEdit && (
          <button
            type="button"
            className="btn btn-secondary"
            style={{ marginLeft: '8px' }}
            onClick={() => navigate(`/exercises/${exerciseId}`)}
          >
            Ansehen
          </button>
        )}
      </div>

      <div className="card">
        <h1 style={{ marginTop: 0, fontSize: '1.25rem' }}>{isEdit ? 'Übung bearbeiten' : 'Neue Übung'}</h1>

        <form onSubmit={handleSubmit}>
          <div className="form-row">
            <label className="form-label">Titel *</label>
            <input
              type="text"
              className="form-input"
              value={formData.title}
              onChange={(e) => updateFormField('title', e.target.value)}
              required
              minLength={3}
            />
          </div>

          <div className="form-row">
            <label className="form-label">Kurzbeschreibung</label>
            <RichTextEditor
              value={formData.summary}
              onChange={(html) => updateFormField('summary', html)}
              placeholder="Kurzbeschreibung (optional)"
              minHeight="80px"
            />
          </div>

          <div className="form-row">
            <label className="form-label">Ziel *</label>
            <RichTextEditor
              value={formData.goal}
              onChange={(html) => updateFormField('goal', html)}
              placeholder="Trainingsziel"
              minHeight="120px"
            />
          </div>

          <div className="form-row">
            <label className="form-label">Durchführung *</label>
            <RichTextEditor
              value={formData.execution}
              onChange={(html) => updateFormField('execution', html)}
              placeholder="Ablauf Schritt für Schritt"
              minHeight="180px"
            />
          </div>

          <div className="form-row">
            <label className="form-label">Vorbereitung / Aufbau</label>
            <RichTextEditor
              value={formData.preparation}
              onChange={(html) => updateFormField('preparation', html)}
              placeholder="Matten, Raum, …"
              minHeight="100px"
            />
          </div>

          <div className="form-row">
            <label className="form-label">Hinweise für Trainer</label>
            <RichTextEditor
              value={formData.trainer_notes}
              onChange={(html) => updateFormField('trainer_notes', html)}
              placeholder="Sicherheit, Varianten-Hinweise, …"
              minHeight="100px"
            />
          </div>

          <div className="form-row">
            <label className="form-label">Material (eine Zeile oder kommagetrennt)</label>
            <textarea
              className="form-input"
              rows={3}
              value={formData.equipmentLines}
              onChange={(e) => updateFormField('equipmentLines', e.target.value)}
              placeholder="Matten&#10;Pratzen"
            />
          </div>

          <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: '10px' }}>
            <div className="form-row">
              <label className="form-label">Dauer Min</label>
              <input
                type="number"
                className="form-input"
                value={formData.duration_min}
                onChange={(e) =>
                  updateFormField('duration_min', e.target.value ? parseInt(e.target.value, 10) : '')
                }
              />
            </div>
            <div className="form-row">
              <label className="form-label">Dauer Max</label>
              <input
                type="number"
                className="form-input"
                value={formData.duration_max}
                onChange={(e) =>
                  updateFormField('duration_max', e.target.value ? parseInt(e.target.value, 10) : '')
                }
              />
            </div>
          </div>

          <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: '10px' }}>
            <div className="form-row">
              <label className="form-label">Gruppe Min</label>
              <input
                type="number"
                className="form-input"
                value={formData.group_size_min}
                onChange={(e) =>
                  updateFormField('group_size_min', e.target.value ? parseInt(e.target.value, 10) : '')
                }
              />
            </div>
            <div className="form-row">
              <label className="form-label">Gruppe Max</label>
              <input
                type="number"
                className="form-input"
                value={formData.group_size_max}
                onChange={(e) =>
                  updateFormField('group_size_max', e.target.value ? parseInt(e.target.value, 10) : '')
                }
              />
            </div>
          </div>

          <MultiAssocBlock
            title="Fokusbereiche (0…n, ein „primär“)"
            rows={formData.focus_areas_multi}
            setRows={(r) => updateFormField('focus_areas_multi', r)}
            options={focusAreas}
            idKey="focus_area_id"
            emptyLabel="Keine Zuordnung — optional „+ Eintrag“."
          />

          <MultiAssocBlock
            title="Stilrichtungen (0…n, z. B. Shotokan)"
            rows={formData.training_styles_multi}
            setRows={(r) => updateFormField('training_styles_multi', r)}
            options={styleDirections.map((sd) => ({
              ...sd,
              name: sd.parent_style_name ? `${sd.name} (${sd.parent_style_name})` : sd.name,
            }))}
            idKey="training_style_id"
            emptyLabel="Keine Stilrichtung gewählt."
          />

          <MultiAssocBlock
            title="Trainingsstil (0…n, z. B. Breitensport / Leistungssport)"
            rows={formData.training_types_multi}
            setRows={(r) => updateFormField('training_types_multi', r)}
            options={trainingTypes}
            idKey="training_type_id"
            emptyLabel="Kein Trainingsstil gewählt."
          />

          <MultiAssocBlock
            title="Zielgruppen (0…n)"
            rows={formData.target_groups_multi}
            setRows={(r) => updateFormField('target_groups_multi', r)}
            options={targetGroups}
            idKey="target_group_id"
            emptyLabel="Keine Zielgruppe gewählt."
          />

          <div className="form-row">
            <label className="form-label">Fähigkeiten (je Übung mehrere, mit Niveau)</label>
            <div style={{ display: 'flex', flexWrap: 'wrap', gap: '8px', marginBottom: '10px' }}>
              <select
                className="form-input"
                style={{ flex: '1 1 200px' }}
                value={skillPick}
                onChange={(e) => setSkillPick(e.target.value)}
              >
                <option value="">Fähigkeit wählen…</option>
                {availableSkills.map((s) => (
                  <option key={s.id} value={s.id}>
                    {s.name} ({s.category})
                  </option>
                ))}
              </select>
              <button type="button" className="btn btn-secondary" onClick={addSkillRow}>
                Hinzufügen
              </button>
            </div>
            {formData.skills.map((row, idx) => {
              const sk = skillsCatalog.find((s) => s.id === row.skill_id)
              return (
                <div key={`${row.skill_id}-${idx}`} className="skills-editor-row">
                  <div>
                    <strong style={{ fontSize: '14px' }}>{sk?.name || `Skill #${row.skill_id}`}</strong>
                    {sk?.category && (
                      <span style={{ color: 'var(--text2)', fontSize: '12px', marginLeft: '6px' }}>
                        {sk.category}
                      </span>
                    )}
                  </div>
                  <label style={{ fontSize: '12px', display: 'flex', alignItems: 'center', gap: '4px' }}>
                    <input
                      type="radio"
                      name="skill-primary"
                      checked={row.is_primary}
                      onChange={() => setSkillPrimary(idx)}
                    />
                    primär
                  </label>
                  <select
                    className="form-input"
                    value={row.intensity || ''}
                    onChange={(e) => updateSkillField(idx, 'intensity', e.target.value)}
                  >
                    {INTENSITY_OPTIONS.map((o) => (
                      <option key={o.value || 'i'} value={o.value}>
                        {o.label}
                      </option>
                    ))}
                  </select>
                  <select
                    className="form-input"
                    value={row.required_level || ''}
                    onChange={(e) => updateSkillField(idx, 'required_level', e.target.value)}
                  >
                    {LEVEL_OPTIONS.map((o) => (
                      <option key={`r-${o.value}`} value={o.value}>
                        von {o.label}
                      </option>
                    ))}
                  </select>
                  <select
                    className="form-input"
                    value={row.target_level || ''}
                    onChange={(e) => updateSkillField(idx, 'target_level', e.target.value)}
                  >
                    {LEVEL_OPTIONS.map((o) => (
                      <option key={`t-${o.value}`} value={o.value}>
                        bis {o.label}
                      </option>
                    ))}
                  </select>
                  <button type="button" className="btn" style={{ fontSize: '12px', padding: '4px 8px' }} onClick={() => removeSkillRow(idx)}>
                    Entf.
                  </button>
                </div>
              )
            })}
          </div>

          <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: '10px' }}>
            <div className="form-row">
              <label className="form-label">Sichtbarkeit</label>
              <select
                className="form-input"
                value={formData.visibility}
                onChange={(e) => updateFormField('visibility', e.target.value)}
              >
                <option value="private">Privat</option>
                <option value="club">Verein</option>
                <option value="official">Offiziell</option>
              </select>
            </div>
            <div className="form-row">
              <label className="form-label">Status</label>
              <select
                className="form-input"
                value={formData.status}
                onChange={(e) => updateFormField('status', e.target.value)}
              >
                <option value="draft">Entwurf</option>
                <option value="in_review">In Prüfung</option>
                <option value="approved">Freigegeben</option>
                <option value="archived">Archiviert</option>
              </select>
            </div>
          </div>

          <div style={{ marginTop: '16px' }}>
            <button type="submit" className="btn btn-primary" disabled={saving}>
              {saving ? 'Speichern…' : isEdit ? 'Speichern' : 'Anlegen & weiter'}
            </button>
          </div>
        </form>
      </div>

      {isEdit && (
        <div className="card" style={{ marginTop: '16px' }}>
          <h2 style={{ marginTop: 0, fontSize: '1.1rem' }}>Medien</h2>
          <p style={{ color: 'var(--text2)', fontSize: '13px' }}>
            Datei oder Embed (YouTube, Vimeo, Instagram, TikTok). Max. 10 pro Übung.
          </p>
          <div style={{ display: 'grid', gap: '12px', marginTop: '12px' }}>
            <div>
              <label className="form-label">Datei</label>
              <input
                type="file"
                accept="image/jpeg,image/png,image/gif,video/mp4,application/pdf"
                onChange={(e) => setMediaFile(e.target.files?.[0] || null)}
              />
              <div className="form-row" style={{ marginTop: '8px' }}>
                <select className="form-input" value={mediaType} onChange={(e) => setMediaType(e.target.value)}>
                  <option value="image">Bild</option>
                  <option value="video">Video</option>
                  <option value="document">PDF</option>
                </select>
                <input
                  type="text"
                  className="form-input"
                  placeholder="Titel (optional)"
                  value={mediaTitle}
                  onChange={(e) => setMediaTitle(e.target.value)}
                  style={{ marginTop: '8px' }}
                />
                <select
                  className="form-input"
                  value={mediaContext}
                  onChange={(e) => setMediaContext(e.target.value)}
                  style={{ marginTop: '8px' }}
                >
                  <option value="ablauf">Ablauf</option>
                  <option value="detail">Detail</option>
                  <option value="trainer_hint">Trainer-Hinweis</option>
                </select>
              </div>
              <button type="button" className="btn btn-secondary" style={{ marginTop: '8px' }} onClick={handleUploadFile}>
                Hochladen
              </button>
            </div>
            <div>
              <label className="form-label">Embed-URL</label>
              <input
                type="url"
                className="form-input"
                placeholder="https://…"
                value={embedUrl}
                onChange={(e) => setEmbedUrl(e.target.value)}
              />
              <input
                type="text"
                className="form-input"
                placeholder="Titel (optional)"
                value={embedTitle}
                onChange={(e) => setEmbedTitle(e.target.value)}
                style={{ marginTop: '8px' }}
              />
              <button type="button" className="btn btn-secondary" style={{ marginTop: '8px' }} onClick={handleAddEmbed}>
                Embed hinzufügen
              </button>
            </div>
          </div>
          {mediaList.length > 0 && (
            <ul style={{ marginTop: '12px', paddingLeft: '1.2rem' }}>
              {mediaList.map((m) => (
                <li key={m.id} style={{ marginBottom: '6px' }}>
                  {m.title || m.original_filename || m.media_type}{' '}
                  {m.embed_platform ? `(${m.embed_platform})` : ''}
                  <button
                    type="button"
                    className="btn"
                    style={{
                      marginLeft: '8px',
                      fontSize: '11px',
                      padding: '2px 8px',
                      background: 'var(--danger)',
                      color: '#fff',
                      border: 'none',
                    }}
                    onClick={() => handleDeleteMedia(m.id)}
                  >
                    Löschen
                  </button>
                </li>
              ))}
            </ul>
          )}
        </div>
      )}

      <p style={{ fontSize: '12px', color: 'var(--text3)', marginTop: '16px' }}>
        Varianten-Editor folgt später (API teilweise vorhanden).{' '}
        <strong>KI-Ausbaustufe:</strong> Backend laut Spec{' '}
        <code style={{ fontSize: '11px' }}>POST /api/exercises/ai/suggest</code> und{' '}
        <code style={{ fontSize: '11px' }}>POST /api/exercises/{'{id}'}/ai/regenerate</code> — z. B.{' '}
        <code>OPENROUTER_API_KEY</code>, Vorschläge nur nach Trainer-Bestätigung übernehmen (siehe{' '}
        <code>api.suggestExerciseAi</code>).
      </p>
    </div>
  )
}

export default ExerciseFormPage