import {z} from 'zod'

export type GetApiV1HistoryArgs = {symbol: string, resolution: '1' | '2' | '3' | '5' | '15' | '30' | '60' | '240' | '480' | 'D' | 'W', from: number, to: number, countback?: number | undefined, extended?: boolean | undefined};

export type GetApiV1HistoryOptions = {baseUrl?: string | undefined, bearerApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const historyOk = z.object({s: z.literal("ok"), t: z.array(z.number().int()), o: z.array(z.number()), h: z.array(z.number()), l: z.array(z.number()), c: z.array(z.number()), v: z.array(z.number()), bv: z.array(z.number()).optional(), sv: z.array(z.number()).optional(), uv: z.array(z.number()).optional()});

export const historyNoData = z.object({s: z.literal("no_data"), nextTime: z.number().int().optional()});

export const getApiV1HistoryResponse = z.union([historyOk, historyNoData]);

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
};

/**
 * OHLCV price bars for a symbol and resolution
 * 
 * GET /v1/history
 */
export const getApiV1History = async (args: GetApiV1HistoryArgs, options?: GetApiV1HistoryOptions) => {
const {baseUrl = "https://flow-api.skylit.ai", fetch: fetchFn = fetch, bearerApiKey} = options ?? {}

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

if (args.symbol != null) query.append("symbol", String(args.symbol))
if (args.resolution != null) query.append("resolution", String(args.resolution))
if (args.from != null) query.append("from", String(args.from))
if (args.to != null) query.append("to", String(args.to))
if (args.countback != null) query.append("countback", String(args.countback))
if (args.extended != null) query.append("extended", String(args.extended))
if (bearerApiKey !== undefined) headers.set('authorization', `Bearer ${bearerApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/history${query.size > 0 ? `?${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(getApiV1HistoryResponse, await res.json())
};