import {z} from 'zod'

export type GetApiV0ShareClassesOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const uUID = z.string();

export const shareClassSymbol = z.enum(["EUTBL", "USTBL", "eurUSTBL", "SPKCC", "eurSPKCC", "UKTBL", "eurUKTBL", "SAFO", "SAFOd", "eurSAFO", "eurSAFOd", "gbpSAFO", "gbpSAFOd", "chfSAFO", "sekSAFO", "nokSAFO", "dkkSAFO", "plnSAFO", "hufSAFO", "czkSAFO"]);

export const currencyCode = z.enum(["EUR", "USD", "GBP", "CHF", "JPY", "SGD", "SEK", "NOK", "DKK", "PLN", "HUF", "CZK"]);

export const eVMNetwork = z.enum(["Ethereum", "Polygon", "Base", "Arbitrum", "ArbitrumUk", "Etherlink"]);

export const evmAddress = z.string();

export const starknetAddress = z.string();

export const stellarAccountAddress = z.string();

export const stellarContractAddress = z.string();

export const solanaAddress = z.string();

export const getApiV0ShareClassesResponse = z.array(z.object({id: uUID, symbol: shareClassSymbol, fundId: uUID, isin: z.string(), navDecimals: z.number().int().gte(0).lte(20), shareDecimals: z.number().int().gte(0).lte(20), currency: currencyCode, tokens: z.array(z.union([z.object({network: eVMNetwork, address: evmAddress}), z.object({network: z.literal("Starknet"), address: starknetAddress}), z.object({network: z.literal("Stellar"), address: z.union([stellarAccountAddress, stellarContractAddress])}), z.object({network: z.literal("Solana"), address: solanaAddress})])), useOfIncome: z.enum(["accumulating", "distributing"]), minimumInitialSubscription: z.string(), minimumSubsequentSubscription: z.string(), minimumRedemption: z.string(), subscriptionFees: z.string(), redemptionFees: z.string(), managementFees: z.string(), bankAccountNumber: z.string(), bankAccountIntermediaryBic: z.string().nullable(), bankAccountBic: z.string(), intermediaryShareClasses: z.array(z.array(z.unknown())), cashCollectionBankAccount: z.union([z.object({bank: z.literal("MemoBank"), id: uUID, legalEntity: z.enum(["spiko-sicav", "spiko-finance", "spiko-cash-and-carry"]), details: z.object({beneficiaryName: z.string().min(1), bic: z.string(), currency: currencyCode, accountNumber: z.string(), intermediaryBic: z.string().nullable()})}), z.object({bank: z.literal("BankingCircle"), id: uUID, details: z.object({beneficiaryName: z.string().min(1), bic: z.string(), currency: currencyCode, accountNumber: z.string(), intermediaryBic: z.string().nullable()})}), z.object({bank: z.literal("HSBC"), id: uUID, details: z.object({beneficiaryName: z.string().min(1), bic: z.string(), currency: currencyCode, accountNumber: z.string(), intermediaryBic: z.string().nullable()})})]).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
};

/**
 * List share classes
 * 
 * GET /v0/share-classes
 */
export const getApiV0ShareClasses = async (options?: GetApiV0ShareClassesOptions) => {
const {baseUrl = "https://distributor-api.spiko.io", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v0/share-classes${query.size > 0 ? `?${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(getApiV0ShareClassesResponse, await res.json())
};