import {z} from 'zod'

export type UUID = string;

export type GetApiFundAssetsArgs = {fundId: UUID, valuationDay?: string | undefined};

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

export const uUID = z.string();

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

export const amountEncoded = z.object({value: z.string(), currency: currencyCode});

export const getApiFundAssetsResponse = z.array(z.union([z.object({id: uUID, fundId: uUID, valuationDay: z.string(), assetLabel: z.object({en: z.string(), es: z.string(), fr: z.string(), it: z.string(), de: z.string(), nl: z.string()}), currency: currencyCode, quantity: z.string(), totalMarketValue: amountEncoded, unitMarketValue: amountEncoded, totalAcquisitionCost: amountEncoded, unitAcquisitionCost: amountEncoded, totalGainOnAsset: amountEncoded, unitGainOnAsset: amountEncoded, percentageOfFundTotalNetAssets: z.string(), fundTotalNetAssetsMarketValue: amountEncoded, createdAt: z.string(), assetType: z.literal("bond"), isin: z.string(), issuerCountryCode: z.string(), nominalValue: amountEncoded, maturity: z.enum(["short", "long"]), maturityDate: z.string(), daysToMaturity: z.number(), yieldToMaturity: z.string()}), z.object({id: uUID, fundId: uUID, valuationDay: z.string(), assetLabel: z.object({en: z.string(), es: z.string(), fr: z.string(), it: z.string(), de: z.string(), nl: z.string()}), currency: currencyCode, quantity: z.string(), totalMarketValue: amountEncoded, unitMarketValue: amountEncoded, totalAcquisitionCost: amountEncoded, unitAcquisitionCost: amountEncoded, totalGainOnAsset: amountEncoded, unitGainOnAsset: amountEncoded, percentageOfFundTotalNetAssets: z.string(), fundTotalNetAssetsMarketValue: amountEncoded, createdAt: z.string(), assetType: z.literal("equity"), isin: z.string(), issuerCountryCode: z.string(), securityName: z.string()}), z.object({id: uUID, fundId: uUID, valuationDay: z.string(), assetLabel: z.object({en: z.string(), es: z.string(), fr: z.string(), it: z.string(), de: z.string(), nl: z.string()}), currency: currencyCode, quantity: z.string(), totalMarketValue: amountEncoded, unitMarketValue: amountEncoded, totalAcquisitionCost: amountEncoded, unitAcquisitionCost: amountEncoded, totalGainOnAsset: amountEncoded, unitGainOnAsset: amountEncoded, percentageOfFundTotalNetAssets: z.string(), fundTotalNetAssetsMarketValue: amountEncoded, createdAt: z.string(), assetType: z.literal("cash"), code: z.string()}), z.object({id: uUID, fundId: uUID, valuationDay: z.string(), assetLabel: z.object({en: z.string(), es: z.string(), fr: z.string(), it: z.string(), de: z.string(), nl: z.string()}), currency: currencyCode, quantity: z.string(), totalMarketValue: amountEncoded, unitMarketValue: amountEncoded, totalAcquisitionCost: amountEncoded, unitAcquisitionCost: amountEncoded, totalGainOnAsset: amountEncoded, unitGainOnAsset: amountEncoded, percentageOfFundTotalNetAssets: z.string(), fundTotalNetAssetsMarketValue: amountEncoded, createdAt: z.string(), assetType: z.literal("reverse_repo"), code: z.string()}), z.object({id: uUID, fundId: uUID, valuationDay: z.string(), assetLabel: z.object({en: z.string(), es: z.string(), fr: z.string(), it: z.string(), de: z.string(), nl: z.string()}), currency: currencyCode, quantity: z.string(), totalMarketValue: amountEncoded, unitMarketValue: amountEncoded, totalAcquisitionCost: amountEncoded, unitAcquisitionCost: amountEncoded, totalGainOnAsset: amountEncoded, unitGainOnAsset: amountEncoded, percentageOfFundTotalNetAssets: z.string(), fundTotalNetAssetsMarketValue: amountEncoded, createdAt: z.string(), assetType: z.literal("swap"), code: 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
};

/**
 * GET /fund-assets/
 */
export const getApiFundAssets = async (args: GetApiFundAssetsArgs, options?: GetApiFundAssetsOptions) => {
const {baseUrl = "https://public-api.spiko.io/v0", fetch: fetchFn = fetch} = options ?? {}

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

if (args.fundId != null) query.append("fundId", String(args.fundId))
if (args.valuationDay != null) query.append("valuationDay", String(args.valuationDay))

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