import { CreateScriptResponse, ScriptDetail, ExpiresIn, MarketResponse, RuntimeCategory, RuntimeVariant, AuthResponse } from '../types'

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

function getToken(): string {
  return localStorage.getItem('token') || ''
}

export async function createScript(params: {
  title: string
  description?: string
  content: string
  category_id: number
  expires_in: ExpiresIn
  publish: boolean
}): Promise<CreateScriptResponse> {
  return request('/api/scripts', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json', 'Authorization': `Bearer ${getToken()}` },
    body: JSON.stringify(params),
  })
}

export async function getScript(id: string): Promise<ScriptDetail> {
  return request(`/api/scripts/${id}`)
}

export async function publishScript(id: string, token: string): Promise<{ id: string; status: string }> {
  return request(`/api/scripts/${id}/publish?token=${encodeURIComponent(token)}`, {
    method: 'POST',
  })
}

export async function deleteScript(id: string, token: string): Promise<void> {
  await fetch(`/api/scripts/${id}?token=${encodeURIComponent(token)}`, {
    method: 'DELETE',
  }).then((res) => {
    if (!res.ok && res.status !== 204) throw new Error('delete failed')
  })
}

export async function listMarket(params: {
  page?: number
  per_page?: number
  category_id?: number
  search?: string
}): Promise<MarketResponse> {
  const query = new URLSearchParams()
  if (params.page) query.set('page', String(params.page))
  if (params.per_page) query.set('per_page', String(params.per_page))
  if (params.category_id) query.set('category_id', String(params.category_id))
  if (params.search) query.set('search', params.search)
  return request(`/api/market?${query.toString()}`)
}

export async function listCategories(): Promise<RuntimeCategory[]> {
  const res = await request<{ categories: RuntimeCategory[] }>('/api/categories')
  return res.categories || []
}

export async function register(username: string, password: string): Promise<AuthResponse> {
  const res = await request<AuthResponse>('/api/auth/register', {
    method: 'POST',
    body: JSON.stringify({ username, password }),
  })
  localStorage.setItem('token', res.token)
  return res
}

export async function login(username: string, password: string): Promise<AuthResponse> {
  const res = await request<AuthResponse>('/api/auth/login', {
    method: 'POST',
    body: JSON.stringify({ username, password }),
  })
  localStorage.setItem('token', res.token)
  return res
}

export async function getMe(): Promise<{ id: number; username: string; role: string }> {
  return request('/api/auth/me', {
    headers: { 'Authorization': `Bearer ${getToken()}` },
  })
}

export function isLoggedIn(): boolean {
  return !!localStorage.getItem('token')
}

export function logout(): void {
  localStorage.removeItem('token')
}

// --- Admin API ---

export async function adminCreateCategory(cat: Partial<RuntimeCategory>): Promise<RuntimeCategory> {
  const res = await request<{ category: RuntimeCategory }>('/api/admin/categories', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json', 'Authorization': `Bearer ${getToken()}` },
    body: JSON.stringify(cat),
  })
  return res.category
}

export async function adminUpdateCategory(id: number, cat: Partial<RuntimeCategory>): Promise<RuntimeCategory> {
  const res = await request<{ category: RuntimeCategory }>(`/api/admin/categories/${id}`, {
    method: 'PUT',
    headers: { 'Content-Type': 'application/json', 'Authorization': `Bearer ${getToken()}` },
    body: JSON.stringify(cat),
  })
  return res.category
}

export async function adminDeleteCategory(id: number): Promise<void> {
  await request(`/api/admin/categories/${id}`, {
    method: 'DELETE',
    headers: { 'Authorization': `Bearer ${getToken()}` },
  })
}

export async function adminCreateVariant(categoryId: number, variant: Partial<RuntimeVariant>): Promise<RuntimeVariant> {
  const res = await request<{ variant: RuntimeVariant }>(`/api/admin/categories/${categoryId}/variants`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json', 'Authorization': `Bearer ${getToken()}` },
    body: JSON.stringify(variant),
  })
  return res.variant
}

export async function adminUpdateVariant(id: number, variant: Partial<RuntimeVariant>): Promise<RuntimeVariant> {
  const res = await request<{ variant: RuntimeVariant }>(`/api/admin/variants/${id}`, {
    method: 'PUT',
    headers: { 'Content-Type': 'application/json', 'Authorization': `Bearer ${getToken()}` },
    body: JSON.stringify(variant),
  })
  return res.variant
}

export async function adminDeleteVariant(id: number): Promise<void> {
  await request(`/api/admin/variants/${id}`, {
    method: 'DELETE',
    headers: { 'Authorization': `Bearer ${getToken()}` },
  })
}