import {z} from 'zod'

export type GetApiLoansArgs = {nftId?: string | undefined, collection?: string | undefined, seller?: string | undefined, buyer?: string | undefined};

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

export const loanStruct = z.object({buyerNftId: z.string().optional(), sellerNftId: z.string().optional(), remainingPrincipal: z.string().optional(), minimumPrincipalPerPeriod: z.string().optional(), periodInterestRateBps: z.number().int().optional(), periodDuration: z.number().int().optional(), periodEndTimestamp: z.number().int().optional(), periodBeginTimestamp: z.number().int().optional()});

export const offerStruct = z.object({minimumPrincipalPerPeriod: z.string().optional(), periodDuration: z.number().int().optional(), creator: z.string().optional(), nftContractAddress: z.string().optional(), price: z.string().optional(), periodInterestRateBps: z.number().int().optional(), nftId: z.string().optional(), expiration: z.number().int().optional(), downPaymentAmount: z.string().optional(), collectionOfferLimit: z.string().optional()});

export const offer = z.object({offer: offerStruct.optional(), signature: z.string().optional(), createdAt: z.number().int().optional(), status: z.enum(["ACTIVE", "EXPIRED", "CANCELLED", "USED_TO_EXECUTE_LOAN", "COLLECTION_OFFER_LIMIT_REACHED"]).optional(), isCollectionOffer: z.boolean().optional(), howManyTimesUsed: z.number().int().optional()});

export const transferEventArgs = z.object({from: z.string().optional(), to: z.string().optional(), tokenId: z.string().optional()});

export const transferEvent = z.object({args: transferEventArgs.optional(), blockNumber: z.number().int().optional(), transactionHash: z.string().optional(), transactionIndex: z.number().int().optional(), logIndex: z.number().int().optional(), eventType: z.literal("Transfer").optional()});

export const nftDetails = z.object({tokenId: z.string().optional(), owner: z.string().optional(), ownerHistory: z.array(z.string()).optional(), transferEvents: z.array(transferEvent).optional()});

export const loan = z.object({loan: loanStruct.optional(), offer: offer.optional(), buyerNft: nftDetails.optional(), sellerNft: nftDetails.optional(), paymentHistory: z.array(z.unknown()).optional(), status: z.enum(["ACTIVE", "FULLY_REPAID", "ASSET_SEIZED"]).optional(), defaultStatus: z.enum(["NOT_IN_DEFAULT", "IN_DEFAULT_AND_REPAYABLE", "IN_DEFAULT_AND_NOT_REPAYABLE"]).optional()});

export const getApiLoansResponse = z.array(loan);

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
};

/**
 * Retrieve loans
 * 
 * GET /loans
 */
export const getApiLoans = async (args: GetApiLoansArgs, options?: GetApiLoansOptions) => {
const {baseUrl = "https://api.niftyapes.money/MAINNET/v1", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.nftId != null) query.append("nftId", String(args.nftId))
if (args.collection != null) query.append("collection", String(args.collection))
if (args.seller != null) query.append("seller", String(args.seller))
if (args.buyer != null) query.append("buyer", String(args.buyer))
if (ApiKeyAuth !== undefined) headers.set("x-api-key", ApiKeyAuth)

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