import {z} from 'zod'

export type Transaction = {nonce?: number | undefined, value?: string | undefined, receiver?: string | undefined, sender?: string | undefined, senderusername?: Array<number> | undefined, receiverusername?: Array<number> | undefined, gasprice?: number | undefined, gaslimit?: number | undefined, data?: Array<number> | undefined, signature?: string | undefined, chainid?: string | undefined, version?: number | undefined, options?: number | undefined};

export type CreateApiTransactionSendMultipleArgs = {transactions: Array<Transaction>};

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

export const genericResponse = z.object({data: z.object({}).optional(), error: z.string().optional(), code: 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
};

/**
 * sends a bulk of transactions to the network
 * 
 * POST /transaction/send-multiple
 */
export const createApiTransactionSendMultiple = async (args: CreateApiTransactionSendMultipleArgs, options: CreateApiTransactionSendMultipleOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

for (const item of args.transactions ?? []) query.append("transactions", String(item))

const url = `${baseUrl.replace(/\/+$/, '')}/transaction/send-multiple${query.size > 0 ? `?${query}` : ''}`

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

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

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