import {z} from 'zod'

export type GetApiV1RouteResultArgs = {query_id: number};

export type GetApiV1RouteResultOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const apiTransactionStatus = z.enum(["pending", "partially_complete", "succeeded", "failed", "timed_out"]);

export const apiTransactionStepStatus = z.enum(["pending", "cancelled", "succeeded", "failed", "timed_out"]);

export const apiQuantifiedToken = z.object({token_blockchain: z.string(), token_address: z.string(), amount: z.number()});

export const apiTransactionStepResult = z.object({status: apiTransactionStepStatus, input: apiQuantifiedToken.optional(), output: apiQuantifiedToken.optional()});

export const apiTransactionResult = z.object({status: apiTransactionStatus, steps: z.array(apiTransactionStepResult), input: apiQuantifiedToken.optional(), output: apiQuantifiedToken.optional()});

export const getApiV1RouteResultResponse = z.array(apiTransactionResult);

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
};

/**
 * Get route transactions execution result
 * 
 * GET /v1/route/result
 */
export const getApiV1RouteResult = async (args: GetApiV1RouteResultArgs, options?: GetApiV1RouteResultOptions) => {
const {baseUrl = "https://backend.swap.coffee", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (args.query_id != null) query.append("query_id", String(args.query_id))
if (ApiKey !== undefined) headers.set("X-Api-Key", ApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/route/result${query.size > 0 ? `?${query}` : ''}`

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

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

return validateResponse(getApiV1RouteResultResponse, await res.json())
};