import {z} from 'zod'

export type TimeseriesMetric = 'volume.perps' | 'volume.swaps' | 'volume.total' | 'fees.trading' | 'fees.swap' | 'fees.total' | 'revenue.protocol' | 'revenue.lp' | 'trades.perps' | 'trades.swaps' | 'users.active';

export type TimeseriesGroupBy = 'network' | 'version' | 'none';

export type Network = 'arbitrum' | 'avalanche' | 'megaeth' | 'solana';

export type Version = 'v1' | 'v2';

export type GetApiStatsTimeseriesArgs = {metric: TimeseriesMetric, groupBy?: TimeseriesGroupBy | undefined, networks?: Array<Network> | undefined, versions?: Array<Version> | undefined, from?: number | undefined, to?: number | undefined};

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

export const timeseriesPointResponse = z.object({provisional: z.boolean(), value: z.union([z.string(), z.number()]).nullable(), day: z.number()});

export const timeseriesGroupResponse = z.object({points: z.array(timeseriesPointResponse), key: z.string()});

export const timeseriesGroupBy = z.enum(["network", "version", "none"]);

export const timeseriesMetric = z.enum(["volume.perps", "volume.swaps", "volume.total", "fees.trading", "fees.swap", "fees.total", "revenue.protocol", "revenue.lp", "trades.perps", "trades.swaps", "users.active"]);

export const sourceHealth = z.enum(["fresh", "stale", "missing"]);

export const metricGroup = z.enum(["volume", "volume24h", "openInterest", "fees", "fees24h", "revenue", "tvl", "users", "trades"]);

export const version = z.enum(["v1", "v2"]);

export const network = z.enum(["arbitrum", "avalanche", "megaeth", "solana"]);

export const sourceStatusResponse = z.object({lastError: z.string().nullable(), lagSeconds: z.number().nullable(), health: sourceHealth, fetchedAt: z.number().nullable(), asOf: z.number().nullable(), metrics: z.array(metricGroup), version: version, network: network, id: z.string()});

export const completeness = z.enum(["complete", "partial"]);

export const summaryMetaResponse = z.object({schemaVersion: z.string(), sources: z.array(sourceStatusResponse), completeness: completeness, asOf: z.number()});

export const timeseriesResponse = z.object({groups: z.array(timeseriesGroupResponse), groupBy: timeseriesGroupBy, interval: z.literal("1d"), metric: timeseriesMetric, meta: summaryMetaResponse});

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 /stats/timeseries
 */
export const getApiStatsTimeseries = async (args: GetApiStatsTimeseriesArgs, options?: GetApiStatsTimeseriesOptions) => {
const {baseUrl = "https://arbitrum.gmxapi.io/v1", fetch: fetchFn = fetch} = options ?? {}

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

if (args.metric != null) query.append("metric", String(args.metric))
if (args.groupBy != null) query.append("groupBy", String(args.groupBy))
for (const item of args.networks ?? []) query.append("networks", String(item))
for (const item of args.versions ?? []) query.append("versions", String(item))
if (args.from != null) query.append("from", String(args.from))
if (args.to != null) query.append("to", String(args.to))

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