import {z} from 'zod'

export type CreateApiStellarGetEventsArgs = {body: {id: number, jsonrpc: '2.0', method: 'stellar_getEvents', params: {blockchain: 'stellar_soroban', startLedger: number, endLedger?: number | undefined, limit?: number | undefined, cursor?: string | undefined, filters?: (Array<{type?: ('contract' | 'system' | 'diagnostic') | undefined, contractIds?: Array<string> | undefined, topics?: Array<Array<string>> | undefined}>) | undefined}}};

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

export const createApiStellarGetEventsResponse = z.object({id: z.number().int(), jsonrpc: z.literal("2.0"), result: z.object({events: z.array(z.object({type: z.enum(["contract", "system", "diagnostic"]).optional(), ledger: z.number().int().optional(), ledgerClosedAt: z.string().optional(), contractId: z.string().optional(), id: z.string().optional(), pagingToken: z.string().optional(), topic: z.array(z.string()).optional(), value: z.string().optional(), inSuccessfulContractCall: z.boolean().optional(), txHash: z.string().optional()})), cursor: z.string().optional(), latestLedger: z.number().int().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
};

/**
 * Stream Soroban smart-contract events over a ledger range
 * 
 * POST /?stellar_getEvents
 */
export const createApiStellarGetEvents = async (args: CreateApiStellarGetEventsArgs, options?: CreateApiStellarGetEventsOptions) => {
const {baseUrl = "https://rpc.ankr.com/multichain/569ca1f392f7d3d0bb1073a1173ecb649af1d9249231fe59fa95db19d5ae41fe", 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 = `${baseUrl.replace(/\/+$/, '')}/?stellar_getEvents${query.size > 0 ? `?${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(createApiStellarGetEventsResponse, await res.json())
};