import {z} from 'zod'

export type CreateApiUtilsTxsEvaluateUtxosArgs = {'Content-Type': 'application/json', version?: number | undefined, body: {cbor: string, additionalUtxoSet?: (Array<Array<{txId?: string | undefined, index?: number | undefined} | {address: string, value: {coins: number, assets?: {[key: string]: number} | undefined}, datum_hash?: string | undefined, datum?: {[key: string]: unknown} | undefined, script?: {[key: string]: unknown} | undefined}>>) | undefined}};

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

export const createApiUtilsTxsEvaluateUtxosResponse = z.record(z.string(), z.unknown());

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
};

/**
 * Submit a transaction for execution units evaluation (additional UTXO set)
 * 
 * POST /utils/txs/evaluate/utxos
 */
export const createApiUtilsTxsEvaluateUtxos = async (args: CreateApiUtilsTxsEvaluateUtxosArgs, options?: CreateApiUtilsTxsEvaluateUtxosOptions) => {
const {baseUrl = "https://cardano-mainnet.blockfrost.io/api/v0", fetch: fetchFn = fetch, projectId} = options ?? {}

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

if (args['Content-Type'] != null) headers.set("Content-Type", String(args['Content-Type']))
if (args.version != null) query.append("version", String(args.version))
if (projectId !== undefined) headers.set("project_id", projectId)

const url = `${baseUrl.replace(/\/+$/, '')}/utils/txs/evaluate/utxos${query.size > 0 ? `?${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(createApiUtilsTxsEvaluateUtxosResponse, await res.json())
};