import {z} from 'zod'

export type ScopeItem = {providerId: string, accountId?: string | undefined};

export type PricingSide = 'BUY' | 'SELL' | 'BOTH';

export type RatesRequest = {scope: Array<ScopeItem>, baseAssetId: string, quoteAssetId: string, baseAmount?: string | undefined, side?: PricingSide | undefined};

export type CreateApiTradingRatesArgs = {'Idempotency-Key'?: string | undefined, body: RatesRequest};

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

export const accountAccessResponse = z.object({type: z.literal("PROVIDER_ACCOUNT"), providerId: z.string().optional(), accountId: z.string()});

export const directAccessResponse = z.object({type: z.literal("PROVIDER"), providerId: z.string(), subProviders: z.array(z.string()).optional()});

export const accessTypeResponse = z.discriminatedUnion("type", [accountAccessResponse, directAccessResponse]);

export const transferRail = z.enum(["BLOCKCHAIN", "INTERNAL", "SWIFT", "IBAN", "US_WIRE", "ACH", "SEPA", "SPEI", "PIX", "LBT", "MOMO", "CHAPS", "PAYID", "INTERAC", "INTERNAL_TRANSFER", "CIPS", "NEQUI", "FPS_UK", "FPS_HK", "INSTA_PAY", "PESONET"]);

export const side = z.enum(["BUY", "SELL"]);

export const rate = z.object({via: accessTypeResponse, baseAssetId: z.string(), baseAssetRail: transferRail.optional(), quoteAssetId: z.string(), quoteAssetRail: transferRail.optional(), rate: z.string(), side: side.optional()});

export const tradingErrorSchema = z.object({message: z.string(), code: z.number(), descriptor: z.string().optional()});

export const scopeItemFailure = z.object({providerId: z.string(), accountId: z.string().optional(), error: tradingErrorSchema});

export const ratesResponse = z.object({rates: z.array(rate), errors: z.array(scopeItemFailure)});

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 rates
 * 
 * POST /trading/rates
 */
export const createApiTradingRates = async (args: CreateApiTradingRatesArgs, options?: CreateApiTradingRatesOptions) => {
const {baseUrl = "https://api.fireblocks.io/v1", fetch: fetchFn = fetch} = options ?? {}

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

if (args['Idempotency-Key'] != null) headers.set("Idempotency-Key", String(args['Idempotency-Key']))

const url = `${baseUrl.replace(/\/+$/, '')}/trading/rates${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(ratesResponse, await res.json())
};