import {z} from 'zod'

export type V2controllersKeySendRequestBody = {amount: number, customRecords?: {[key: string]: string} | undefined, custom_records?: {[key: string]: string} | undefined, destination: string, memo?: string | undefined};

export type CreateApiV2PaymentsKeysendArgs = {body: V2controllersKeySendRequestBody};

export type CreateApiV2PaymentsKeysendOptions = {baseUrl: string, OAuth2Password?: string | undefined, fetch?: typeof fetch | undefined};

export const v2controllersKeySendResponseBody = z.object({amount: z.number().int().optional(), custom_records: z.record(z.string(), z.string()).optional(), description: z.string().optional(), description_hash: z.string().optional(), destination: z.string().optional(), fee: z.number().int().optional(), payment_hash: z.string().optional(), payment_preimage: z.string().optional()});

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
};

/**
 * Make a keysend payment
 * 
 * POST /v2/payments/keysend
 */
export const createApiV2PaymentsKeysend = async (args: CreateApiV2PaymentsKeysendArgs, options: CreateApiV2PaymentsKeysendOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth2Password} = options ?? {}

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

if (OAuth2Password !== undefined) headers.set('authorization', `Bearer ${OAuth2Password}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/payments/keysend${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

return validateResponse(v2controllersKeySendResponseBody, await res.json())
};