import {z} from 'zod'

export type CreateApiApiMerchantGenerateSignatureArgs = {Authorization?: string | undefined, 'X-Portone-Client-Key'?: string | undefined, 'Content-Type'?: string | undefined, body: {portone_key: string, currency: string, amount: number, merchant_order_id: string, success_url: string, failure_url: string}};

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

export const signatureHashContent = z.object({signature: z.string().optional()});

export const createApiApiMerchantGenerateSignatureResponse = z.object({content: signatureHashContent.optional(), message: z.string().optional(), status_code: z.string().optional(), status_reason: 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
};

/**
 * Generate signature hash
 * 
 * POST /api/merchant/generate-signature
 */
export const createApiApiMerchantGenerateSignature = async (args: CreateApiApiMerchantGenerateSignatureArgs, options?: CreateApiApiMerchantGenerateSignatureOptions) => {
const {baseUrl = "https://api.portone.cloud", fetch: fetchFn = fetch} = options ?? {}

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

if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))
if (args['X-Portone-Client-Key'] != null) headers.set("X-Portone-Client-Key", String(args['X-Portone-Client-Key']))
if (args['Content-Type'] != null) headers.set("Content-Type", String(args['Content-Type']))

const url = `${baseUrl.replace(/\/+$/, '')}/api/merchant/generate-signature${query.size > 0 ? `?${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(createApiApiMerchantGenerateSignatureResponse, await res.json())
};