import {z} from 'zod'

export type GetApiV1DexPoolsArgs = {assets?: Array<string> | undefined};

export type GetApiV1DexPoolsOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const apiAmmType = z.enum(["constant_product", "cubic_stable", "curve_fi_stable", "concentrated_v3", "tonstakers", "weighted_constant_product", "weighted_stable", "bidask", "moon_dlmm", "bidask_damm", "dedust_v2"]);

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

export const apiPoolReserves = z.array(z.number());

export const apiCoffeeDexTrimmedPool = z.object({address: z.string(), amm_type: apiAmmType, amm_settings: apiJson.optional(), tokens: z.array(z.string()), reserves: apiPoolReserves, unavailable_until: z.number().int().optional()});

export const getApiV1DexPoolsResponse = z.array(apiCoffeeDexTrimmedPool);

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 dex pools by filter
 * 
 * GET /v1/dex/pools
 */
export const getApiV1DexPools = async (args: GetApiV1DexPoolsArgs, options?: GetApiV1DexPoolsOptions) => {
const {baseUrl = "https://backend.swap.coffee", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

for (const item of args.assets ?? []) query.append("assets", String(item))
if (ApiKey !== undefined) headers.set("X-Api-Key", ApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/dex/pools${query.size > 0 ? `?${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(getApiV1DexPoolsResponse, await res.json())
};