import {z} from 'zod'

export type GetApiV1AssetsOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const assetID = z.string();

export const assetSymbol = z.string();

export const assetName = z.string();

export const assetValue = z.string();

export const collateralBand = z.object({collateralPercentage: z.string().optional(), bandLimitUSD: z.string().optional()});

export const underlyingAsset = z.object({symbol: z.string().optional(), assetId: z.string().optional(), bpmMinReturnStart: z.string().optional(), bpmMinReturnEnd: z.string().optional(), bpmMaxReturnStart: z.string().optional(), bpmMaxReturnEnd: z.string().optional(), marketRiskFloorPctStart: z.string().optional(), marketRiskFloorPctEnd: z.string().optional(), bpmTransitionDateTimeStart: z.string().optional(), bpmTransitionDateTimeEnd: z.string().optional()});

export const asset = z.object({assetId: assetID, symbol: assetSymbol, name: assetName, precision: z.string(), minBalanceInterest: assetValue, minFee: assetValue, apr: z.string(), collateralRating: z.string(), maxBorrow: z.string(), totalOfferedLoanQuantity: z.string(), loanBorrowedQuantity: z.string(), collateralBands: z.array(collateralBand), underlyingAsset: underlyingAsset});

export const getApiV1AssetsResponse = z.array(asset);

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 Assets
 * 
 * GET /v1/assets
 */
export const getApiV1Assets = async (options?: GetApiV1AssetsOptions) => {
const {baseUrl = "https://api.exchange.bullish.com/trading-api", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/assets${query.size > 0 ? `?${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(getApiV1AssetsResponse, await res.json())
};