import {z} from 'zod'

export type GetApiV1PoolsOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const getApiV1PoolsResponse = z.object({networkId: z.string(), contractAddress: z.string(), pools: z.array(z.object({poolId: z.string(), poolType: z.enum(["shielded", "unshielded", "mixed", "stableUnshielded"]), liquidityBalanceSource: z.enum(["shielded", "unshielded"]), liquidityManagementMode: z.enum(["batched", "direct"]), tokenA: z.string(), tokenB: z.string(), lpToken: z.string(), reserveAId: z.string(), reserveBId: z.string(), feeLevel: z.number().int().gte(0), feeNumerator: z.string(), ampFactor: z.string().nullable(), reserveA: z.string(), reserveB: z.string(), accruedAdminFeeA: z.string(), accruedAdminFeeB: z.string(), lpTokenTotalSupply: z.string(), lastUpdatedBlockHeight: z.number().int(), lastUpdatedBlockHash: z.string(), lastUpdatedTxId: z.string(), lastUpdatedTxHash: z.string(), lastUpdatedAt: z.string()}))});

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
};

/**
 * List the latest known pool states.
 * 
 * GET /v1/pools
 */
export const getApiV1Pools = async (options: GetApiV1PoolsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/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(getApiV1PoolsResponse, await res.json())
};