import {z} from 'zod'

export type GetApiInboundIdArgs = {id: number};

export type GetApiInboundIdOptions = {baseUrl?: string | undefined, bearerApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const inboundEmail = z.object({id: z.number().int(), domainId: z.number().int().optional(), fromAddress: z.string(), fromName: z.string().nullable().optional(), toAddress: z.string(), toAddresses: z.array(z.string()).nullable().optional(), ccAddresses: z.array(z.string()).nullable().optional(), messageId: z.string().nullable().optional(), subject: z.string().nullable().optional(), htmlBody: z.string().nullable().optional(), textBody: z.string().nullable().optional(), headers: z.object({}).nullable().optional(), mailboxHash: z.string().nullable().optional(), spamScore: z.number().nullable().optional(), spamVerdict: z.string().nullable().optional(), strippedReply: z.string().nullable().optional(), replyCount: z.number().int().optional(), createdAt: z.string()});

export const inboundReplySummary = z.object({id: z.string(), subject: z.string(), toAddresses: z.array(z.string()), status: z.string(), testMode: z.boolean(), createdAt: z.string()});

export const getApiInboundIdResponse = z.object({inboundEmail: inboundEmail, replies: z.array(inboundReplySummary)});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Get a received email
 * 
 * GET /inbound/{id}
 * 
 * Also accepts auth: bearerOAuth
 */
export const getApiInboundId = async (args: GetApiInboundIdArgs, options?: GetApiInboundIdOptions) => {
const {baseUrl = "https://api.poststack.dev", fetch: fetchFn = fetch, bearerApiKey} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (bearerApiKey !== undefined) headers.set('authorization', `Bearer ${bearerApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/inbound/${encodeURIComponent(String(args.id))}${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiInboundIdResponse, await res.json())
};