import {z} from 'zod'

export type GetApiV1TradeOpportunitiesArgs = {limit?: number | undefined};

export type GetApiV1TradeOpportunitiesOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const tradePoolAttributesResponseDto = z.object({poolPair: z.string(), poolHash: z.string(), token0: z.string(), token0Image: z.string(), token1: z.string(), token1Image: z.string(), token0CompositeKey: z.string().nullable(), token1CompositeKey: z.string().nullable(), token0OriginChain: z.string().nullable(), token1OriginChain: z.string().nullable(), token0Price: z.string(), token1Price: z.string(), poolName: z.string(), fee: z.string(), fee24h: z.number(), token0Tvl: z.number(), token0TvlUsd: z.number(), token1Tvl: z.number(), token1TvlUsd: z.number(), tvl: z.number(), volume1d: z.number(), volume30d: z.number(), volume7d: z.number(), trades1d: z.number(), poolCreatedAt: z.string().nullable(), dayPerTvl: z.number(), apr1d: z.number(), signals: z.array(z.enum(["new-active", "trending", "high-turnover", "high-fee", "top-volume", "bot-viable"])), opportunityScore: z.number(), contractVersion: z.enum(["v1", "v2"])});

export const tradePoolListDataResponseDto = z.object({pools: z.array(tradePoolAttributesResponseDto), count: z.number()});

export const tradePoolListResponseDto = z.object({status: z.number(), error: z.literal(false), message: z.string().optional(), data: tradePoolListDataResponseDto});

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 ranked legacy opportunity pools
 * 
 * GET /v1/trade/opportunities
 */
export const getApiV1TradeOpportunities = async (args: GetApiV1TradeOpportunitiesArgs, options?: GetApiV1TradeOpportunitiesOptions) => {
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.limit != null) query.append("limit", String(args.limit))

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