const BASE = '/api'

export async function fetchGuides() {
  const res = await fetch(`${BASE}/guides`)
  return res.json()
}

export async function createGuide(topic, format, instructions = '', provider = 'claude') {
  const res = await fetch(`${BASE}/guides`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ topic, format, instructions, provider }),
  })
  return res.json()
}

export async function fetchActiveBausteine() {
  const res = await fetch(`${BASE}/bausteine/active`)
  return res.json()
}

export async function fetchBausteineStatus(topic) {
  const res = await fetch(`${BASE}/bausteine/status?topic=${encodeURIComponent(topic)}`)
  return res.json()
}

export async function createBausteine(topic, instructions = '', provider = 'claude') {
  const res = await fetch(`${BASE}/bausteine`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ topic, instructions, provider }),
  })
  return res.json()
}

export async function cancelBausteine(topic) {
  await fetch(`${BASE}/bausteine/cancel?topic=${encodeURIComponent(topic)}`, { method: 'POST' })
}

export async function deleteBausteine(topic) {
  await fetch(`${BASE}/bausteine?topic=${encodeURIComponent(topic)}`, { method: 'DELETE' })
}

export async function fetchTopicFortschritt(topic) {
  const res = await fetch(`${BASE}/topics/fortschritt?topic=${encodeURIComponent(topic)}`)
  return res.json()
}

export async function fetchStats() {
  const res = await fetch(`${BASE}/stats`)
  return res.json()
}

export async function fetchProviders() {
  const res = await fetch(`${BASE}/providers`)
  return res.json()
}

export async function fetchProjects() {
  const res = await fetch(`${BASE}/projects`)
  return res.json()
}

export async function deleteProject(name) {
  await fetch(`${BASE}/projects/${encodeURIComponent(name)}`, { method: 'DELETE' })
}

export async function cancelGuide(id) {
  await fetch(`${BASE}/guides/${id}/cancel`, { method: 'POST' })
}

export async function deleteGuide(id, slots = false) {
  await fetch(`${BASE}/guides/${id}${slots ? '?slots=1' : ''}`, { method: 'DELETE' })
}

export async function fetchGuideContent(id) {
  const res = await fetch(`${BASE}/guides/${id}/content`)
  if (!res.ok) throw new Error(`Inhalt nicht verfügbar (${res.status})`)
  return res.json()
}

export async function fetchTopics() {
  const res = await fetch(`${BASE}/topics`)
  return res.json()
}

export async function createTopic(name) {
  await fetch(`${BASE}/topics`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ name }),
  })
}

export async function deleteTopic(name) {
  await fetch(`${BASE}/topics?topic=${encodeURIComponent(name)}`, { method: 'DELETE' })
}

export async function fetchProgress(id) {
  const res = await fetch(`${BASE}/guides/${id}/progress`)
  return res.json()
}

export async function setProgress(id, chapter, done) {
  const res = await fetch(`${BASE}/guides/${id}/progress`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ chapter, done }),
  })
  return res.json()
}

export async function chatGuide(id, { section, outline, messages, provider = 'claude' }) {
  const res = await fetch(`${BASE}/guides/${id}/chat`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ section, outline, messages, provider }),
  })
  return res.json()
}

export async function fetchElements(topic) {
  const res = await fetch(`${BASE}/elements?topic=${encodeURIComponent(topic)}`)
  return res.json()
}

export async function createElement(topic, hint = '', provider = 'claude') {
  const res = await fetch(`${BASE}/elements`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ topic, hint, provider }),
  })
  return res.json()
}

export async function chatElement(id, messages, provider = 'claude') {
  const res = await fetch(`${BASE}/elements/${id}/chat`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ messages, provider }),
  })
  return res.json()
}

export async function deleteElement(id) {
  await fetch(`${BASE}/elements/${id}`, { method: 'DELETE' })
}

export async function updateElement(id, fields) {
  const res = await fetch(`${BASE}/elements/${id}`, {
    method: 'PUT',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(fields),
  })
  return res.json()
}

export async function styleElement(id, provider = 'claude') {
  const res = await fetch(`${BASE}/elements/${id}/style`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ provider }),
  })
  if (!res.ok) throw new Error(`Stil-Prüfung fehlgeschlagen (${res.status})`)
  return res.json()
}

export async function refineSuggestion(id, suggestion, instruction, provider = 'claude') {
  const res = await fetch(`${BASE}/elements/${id}/refine`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ suggestion, instruction, provider }),
  })
  if (!res.ok) throw new Error(`Überarbeitung fehlgeschlagen (${res.status})`)
  return res.json()
}

export async function checkElement(id, provider = 'claude') {
  const res = await fetch(`${BASE}/elements/${id}/check`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ provider }),
  })
  if (!res.ok) throw new Error(`Prüfung fehlgeschlagen (${res.status})`)
  return res.json()
}