import {z} from 'zod'

export type GetApiMarketTokenSeriesArgs = {timeframe: '1D' | '1W' | '1M' | '1Y' | 'ALL', token: string};

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

export const marketOhlcvPointResponseDto = z.object({time: z.union([z.string(), z.number()]), open: z.number(), high: z.number(), low: z.number(), close: z.number(), volume: z.number().optional()});

export const marketTokenSeriesResponseDto = z.object({ohlcv: z.array(marketOhlcvPointResponseDto), currentPrice: z.number().nullable(), change24h: z.number().nullable(), volume24h: z.number().nullable(), source: z.enum(["inhouse", "coingecko", "chainmeter", "none"])});

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
};

/**
 * Normalized USD OHLCV + current price for a token at a timeframe
 * 
 * GET /market/token-series
 */
export const getApiMarketTokenSeries = async (args: GetApiMarketTokenSeriesArgs, options?: GetApiMarketTokenSeriesOptions) => {
const {baseUrl = "https://swap-backend.stage.defi.ovh.gala.com", fetch: fetchFn = fetch} = options ?? {}

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

if (args.timeframe != null) query.append("timeframe", String(args.timeframe))
if (args.token != null) query.append("token", String(args.token))

const url = `${baseUrl.replace(/\/+$/, '')}/market/token-series${query.size > 0 ? `?${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(marketTokenSeriesResponseDto, await res.json())
};