import {z} from 'zod'

export type GetApiAbciQueryArgs = {path: string, data: string, height?: number | undefined, prove?: boolean | undefined};

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

export const aBCIQueryResponse = z.object({error: z.string(), result: z.object({response: z.object({log: z.string(), height: z.string(), proof: z.string(), value: z.string(), key: z.string(), index: z.string(), code: z.string()})}), id: z.number().int(), jsonrpc: z.string()});

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
};

/**
 * Query the application for some information.
 * 
 * GET /abci_query
 */
export const getApiAbciQuery = async (args: GetApiAbciQueryArgs, options?: GetApiAbciQueryOptions) => {
const {baseUrl = "http://localhost:26657", fetch: fetchFn = fetch} = options ?? {}

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

if (args.path != null) query.append("path", String(args.path))
if (args.data != null) query.append("data", String(args.data))
if (args.height != null) query.append("height", String(args.height))
if (args.prove != null) query.append("prove", String(args.prove))

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