import {z} from 'zod'

export type GetApiEmailsArgs = {status?: ('pending' | 'sent' | 'softfail' | 'hardfail' | 'bounced' | 'held') | undefined, to?: string | undefined, from?: string | undefined, tag?: string | undefined, after?: string | undefined, before?: string | undefined, page?: number | undefined, perPage?: number | undefined};

export type GetApiEmailsOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const emailSummary = z.object({id: z.string(), to: z.string(), from: z.string(), subject: z.string(), status: z.enum(["pending", "sent", "softfail", "hardfail", "bounced", "held"]), tag: z.string().optional(), timestamp: z.number(), timestampIso: z.string()});

export const apiMeta = z.object({requestId: z.string()});

export const listEmailsResponse = z.object({data: z.array(emailSummary), page: z.number().int(), perPage: z.number().int(), total: z.number().int(), totalPages: z.number().int(), meta: apiMeta});

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
};

/**
 * List sent emails
 * 
 * GET /emails
 */
export const getApiEmails = async (args: GetApiEmailsArgs, options?: GetApiEmailsOptions) => {
const {baseUrl = "https://api.arkhq.io/v1", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.status != null) query.append("status", String(args.status))
if (args.to != null) query.append("to", String(args.to))
if (args.from != null) query.append("from", String(args.from))
if (args.tag != null) query.append("tag", String(args.tag))
if (args.after != null) query.append("after", String(args.after))
if (args.before != null) query.append("before", String(args.before))
if (args.page != null) query.append("page", String(args.page))
if (args.perPage != null) query.append("perPage", String(args.perPage))
if (apiKey !== undefined) headers.set('authorization', `Bearer ${apiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/emails${query.size > 0 ? `?${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(listEmailsResponse, await res.json())
};