import {z} from 'zod'

export type CreateApiV2MessageDecodeArgs = {body: {boc: unknown}};

export type CreateApiV2MessageDecodeOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const accountAddress = z.object({address: z.string(), icon: z.string().optional(), is_scam: z.boolean(), is_wallet: z.boolean(), name: z.string().optional()});

export const decodedRawMessage = z.object({message: z.object({boc: z.string(), decoded_body: z.unknown(), decoded_op_name: z.string().optional(), op_code: z.string().optional()}), mode: z.number().int()});

export const decodedMessage = z.object({destination: accountAddress, destination_wallet_version: z.string(), ext_in_msg_decoded: z.object({wallet_highload_v2: z.object({bounded_query_id: z.string(), raw_messages: z.array(decodedRawMessage), subwallet_id: z.number().int()}).optional(), wallet_v3: z.object({raw_messages: z.array(decodedRawMessage), seqno: z.number().int(), subwallet_id: z.number().int(), valid_until: z.number().int()}).optional(), wallet_v4: z.object({op: z.number().int(), raw_messages: z.array(decodedRawMessage), seqno: z.number().int(), subwallet_id: z.number().int(), valid_until: z.number().int()}).optional(), wallet_v5: z.object({raw_messages: z.array(decodedRawMessage), valid_until: z.number().int()}).optional()}).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
};

/**
 * Decode a given message. Only external incoming messages can be decoded currently.
 * 
 * POST /v2/message/decode
 */
export const createApiV2MessageDecode = async (args: CreateApiV2MessageDecodeArgs, options?: CreateApiV2MessageDecodeOptions) => {
const {baseUrl = "https://tonapi.io", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v2/message/decode${query.size > 0 ? `?${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(decodedMessage, await res.json())
};