import AsyncStorage from '@react-native-async-storage/async-storage'
import { getConfig } from './config'

const TOKEN_KEY = '@xuqm_sdk_token'
const DEFAULT_API_URL = 'https://dev.xuqinmin.com'

export async function getToken(): Promise<string | null> {
  return AsyncStorage.getItem(TOKEN_KEY)
}

export async function saveToken(token: string): Promise<void> {
  return AsyncStorage.setItem(TOKEN_KEY, token)
}

export async function clearToken(): Promise<void> {
  return AsyncStorage.removeItem(TOKEN_KEY)
}

export async function apiRequest<T>(
  path: string,
  options: { method?: string; body?: unknown; params?: Record<string, string> } = {},
): Promise<T> {
  const config = getConfig()
  const token = await getToken()

  let url = DEFAULT_API_URL.replace(/\/$/, '') + path
  if (options.params) {
    const qs = new URLSearchParams(options.params).toString()
    url += (url.includes('?') ? '&' : '?') + qs
  }

  const res = await fetch(url, {
    method: options.method ?? 'GET',
    headers: {
      'Content-Type': 'application/json',
      Accept: 'application/json',
      ...(token ? { Authorization: `Bearer ${token}` } : {}),
    },
    body: options.body ? JSON.stringify(options.body) : undefined,
  })

  if (!res.ok) {
    const err = await res.json().catch(() => ({ message: res.statusText }))
    throw new Error(err.message ?? `HTTP ${res.status}`)
  }

  const json = await res.json()
  return json.data ?? json
}