import type { Post, Settings, InteractionConfig, Asset, APIKey, AnalyticsSummary } from './types'

const BASE = '/api/studio'

async function request<T>(path: string, options?: RequestInit): Promise<T> {
  const res = await fetch(`${BASE}${path}`, {
    ...options,
    headers: {
      'Content-Type': 'application/json',
      ...options?.headers,
    },
  })
  if (!res.ok) {
    const error = await res.json().catch(() => ({ error: res.statusText }))
    throw new Error(error.error || 'Request failed')
  }
  if (res.status === 204) return undefined as T
  return res.json()
}

export const api = {
  posts: {
    list: () => request<Post[]>('/posts'),
    get: (slug: string) => request<Post>(`/posts/${slug}`),
    create: (data: Partial<Post>) => request<Post>('/posts', {
      method: 'POST',
      body: JSON.stringify(data),
    }),
    update: (slug: string, data: Partial<Post>) => request<Post>(`/posts/${slug}`, {
      method: 'PUT',
      body: JSON.stringify(data),
    }),
    delete: (slug: string) => request<void>(`/posts/${slug}`, { method: 'DELETE' }),
  },

  settings: {
    get: () => request<Settings>('/settings'),
    update: (data: Settings) => request<{ success: boolean }>('/settings', {
      method: 'PUT',
      body: JSON.stringify(data),
    }),
  },

  interactions: {
    get: () => request<InteractionConfig>('/interaction-config'),
    update: (data: Partial<InteractionConfig>) => request<InteractionConfig>('/interaction-config', {
      method: 'PUT',
      body: JSON.stringify(data),
    }),
  },

  assets: {
    list: () => request<Asset[]>('/assets'),
    upload: async (file: File): Promise<Asset> => {
      const form = new FormData()
      form.append('file', file)
      const res = await fetch(`${BASE}/assets`, { method: 'POST', body: form })
      if (!res.ok) throw new Error('Upload failed')
      return res.json()
    },
    delete: (id: string) => request<void>(`/assets/${id}`, { method: 'DELETE' }),
  },

  apiKeys: {
    list: () => request<APIKey[]>('/api-keys'),
    create: (name: string) => request<APIKey>('/api-keys', {
      method: 'POST',
      body: JSON.stringify({ name }),
    }),
    delete: (key: string) => request<void>(`/api-keys/${key}`, { method: 'DELETE' }),
  },

  analytics: {
    get: (days = 30) => request<AnalyticsSummary>(`/analytics?days=${days}`),
    getPost: (slug: string, days = 30) => request<AnalyticsSummary>(`/analytics/posts/${slug}?days=${days}`),
  },
}