import {z} from 'zod'

export type GetApiLiquidityArgs = {'x-api-version': '2026-01.alps', 'x-api-key': string, sourceChainId: number, sourceToken: string, destinationChainId: number, destinationToken: string};

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

export const getApiLiquidityResponse = z.object({symbol: z.string(), decimals: z.number(), unlimited: z.boolean(), maxAmount: z.string().nullable()});

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
};

/**
 * Route liquidity limit
 * 
 * GET /liquidity
 */
export const getApiLiquidity = async (args: GetApiLiquidityArgs, options: GetApiLiquidityOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args['x-api-version'] != null) headers.set("x-api-version", String(args['x-api-version']))
if (args['x-api-key'] != null) headers.set("x-api-key", String(args['x-api-key']))
if (args.sourceChainId != null) query.append("sourceChainId", String(args.sourceChainId))
if (args.sourceToken != null) query.append("sourceToken", String(args.sourceToken))
if (args.destinationChainId != null) query.append("destinationChainId", String(args.destinationChainId))
if (args.destinationToken != null) query.append("destinationToken", String(args.destinationToken))

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