import {z} from 'zod'

export type GetApiMetricsV1ExchangesArgs = {limit?: number | undefined, pageSize?: number | undefined, page?: number | undefined, type?: ('centralized' | 'decentralized') | undefined, typeRankCutoff?: number | undefined};

export type GetApiMetricsV1ExchangesOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

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

export const exchange = z.object({country: z.string(), globalRank30D: z.number().int(), id: z.string(), metrics: exchangeMetrics, name: z.string(), region: z.string(), relatedExchangeIDs: z.array(z.string()), slug: z.string(), type: z.string(), typeRank30D: z.number().int(), yearEstablished: z.number().int()});

export const snapshotListingMetadata = z.object({page: z.number().int(), pageSize: z.number().int(), totalPages: z.number().int(), totalRows: z.number().int()});

export const getApiMetricsV1ExchangesResponse = z.object({data: z.array(exchange), error: z.string().optional(), metadata: snapshotListingMetadata.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
};

/**
 * Get exchanges
 * 
 * GET /metrics/v1/exchanges
 */
export const getApiMetricsV1Exchanges = async (args: GetApiMetricsV1ExchangesArgs, options?: GetApiMetricsV1ExchangesOptions) => {
const {baseUrl = "https://api.messari.io", fetch: fetchFn = fetch, apiKey} = 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.pageSize != null) query.append("pageSize", String(args.pageSize))
if (args.page != null) query.append("page", String(args.page))
if (args.type != null) query.append("type", String(args.type))
if (args.typeRankCutoff != null) query.append("typeRankCutoff", String(args.typeRankCutoff))
if (apiKey !== undefined) headers.set("X-Messari-API-Key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/metrics/v1/exchanges${query.size > 0 ? `?${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(getApiMetricsV1ExchangesResponse, await res.json())
};