import {z} from 'zod'

export type GetApiEmailsIdConversationArgs = {id: string};

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

export const conversationEntry = z.object({kind: z.enum(["inbound", "outbound"]), id: z.union([z.number().int(), z.string()]), fromAddress: z.string(), fromName: z.string().nullable().optional(), toAddress: z.string().optional(), toAddresses: z.array(z.string()).optional(), subject: z.string().nullable().optional(), status: z.string().optional(), messageId: z.string().nullable().optional(), current: z.boolean().optional(), createdAt: z.string()});

export const emailConversation = z.object({messageId: z.string(), inReplyTo: z.string().nullable(), references: z.array(z.string()), repliesTo: conversationEntry.nullable(), timeline: z.array(conversationEntry)});

export const getApiEmailsIdConversationResponse = z.object({conversation: emailConversation});

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 the conversation an email belongs to
 * 
 * GET /emails/{id}/conversation
 * 
 * Also accepts auth: bearerOAuth
 */
export const getApiEmailsIdConversation = async (args: GetApiEmailsIdConversationArgs, options?: GetApiEmailsIdConversationOptions) => {
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 = `${baseUrl.replace(/\/+$/, '')}/emails/${encodeURIComponent(String(args.id))}/conversation${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(getApiEmailsIdConversationResponse, await res.json())
};