/** @typedef {{email: string, apiKey: string, baseURI: string}} Config */

/** @type {(c: Config, url: string, body: Record<string, unknown>) => Promise<void>} */
export const post = async (config, url, body) => {
  const params = new URLSearchParams()
  Object.entries(body).forEach(([k, v]) => {
    params.append(k, typeof v === 'string' ? v : JSON.stringify(v))
  })

  const rep = await fetch(config.baseURI + url, {
    method: 'POST',
    body: params,
    headers: {
      Authorization:
        'Basic ' +
        Buffer.from(`${config.email}:${config.apiKey}`, 'utf8').toString(
          'base64url',
        ),
    },
  })

  if (!rep.ok) {
    let m = `Status not OK: ${rep.status}`
    try {
      m += '\n' + (await rep.text())
    } catch {}

    throw new Error(m)
  }
}

export default {
  Messages: {
    /** @type {(c: Config, body: {type: string, to: string, content: string, topic?: string}) => Promise<void>} */
    send: async (config, b) => post(config, '/messages', b),
  },
}