import {z} from 'zod'

export type GetApiV1ProtocolActivityArgs = {limit?: number | undefined, before?: string | undefined, type?: string | undefined, minUsd?: string | undefined, program?: ('exchange' | 'stability-pool') | undefined, signature?: string | undefined};

export type GetApiV1ProtocolActivityOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const activityEvent = z.object({signature: z.string(), eventName: z.string(), eventType: z.string(), program: z.enum(["exchange", "stability-pool"]), blockTime: z.string(), slot: z.number().int(), eventIndex: z.number().int(), source: z.enum(["event", "derived"]), eventData: z.record(z.string(), z.unknown()), usd: z.string().nullable()});

export const activity = z.object({events: z.array(activityEvent), cursor: z.string().nullable().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
};

/**
 * Event feed
 * 
 * GET /v1/protocol/activity
 */
export const getApiV1ProtocolActivity = async (args: GetApiV1ProtocolActivityArgs, options?: GetApiV1ProtocolActivityOptions) => {
const {baseUrl = "https://api.hylo.so", fetch: fetchFn = fetch} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (args.before != null) query.append("before", String(args.before))
if (args.type != null) query.append("type", String(args.type))
if (args.minUsd != null) query.append("minUsd", String(args.minUsd))
if (args.program != null) query.append("program", String(args.program))
if (args.signature != null) query.append("signature", String(args.signature))

const url = `${baseUrl.replace(/\/+$/, '')}/v1/protocol/activity${query.size > 0 ? `?${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(activity, await res.json())
};