import {z} from 'zod'

export type AccountKey = 'USDC' | 'EURC' | 'RD' | 'USDC_ARB' | 'FDIC_USD' | 'FDIC_EUR' | 'KYC_CARDS';

export type SwapCreateRequest = {sourceAccount: AccountKey, destinationAccount: AccountKey, amount?: (string | null) | undefined, amountTo?: (string | null) | undefined, publicKey: string};

export type CreateApiSwapsArgs = {'X-Hevn-Account'?: (string | null) | undefined, 'Idempotency-Key'?: (string | null) | undefined, body: SwapCreateRequest};

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

export const swapState = z.enum(["awaitingSignature", "submitted", "settled", "failed"]);

export const accountKey = z.enum(["USDC", "EURC", "RD", "USDC_ARB", "FDIC_USD", "FDIC_EUR", "KYC_CARDS"]);

export const swapQuoteView = z.object({fromAmount: z.string(), fromCurrency: z.string(), toAmount: z.string(), toCurrency: z.string(), rate: z.string(), feeAmount: z.string(), feeCurrency: z.string(), minimumToAmount: z.string().nullable().optional(), estimated: z.boolean().optional(), etaHours: z.number().int().nullable().optional(), expiresAt: z.string().nullable().optional()});

export const authorizationKind = z.enum(["debit", "intent", "client"]);

export const approvalView = z.object({id: z.string(), payload: z.string(), expiresAt: z.string()});

export const debitView = z.object({address: z.string(), amount: z.string(), amountAtomic: z.string(), token: z.string(), chainId: z.number().int()});

export const intentView = z.object({digest: z.string(), settles: z.string()});

export const swapResponse = z.object({id: z.string(), status: swapState, idempotencyKey: z.string(), sourceAccount: accountKey, destinationAccount: accountKey, quote: swapQuoteView, authorization: authorizationKind, approval: approvalView, debit: debitView.nullable().optional(), intent: intentView.nullable().optional()});

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
};

/**
 * Create a transfer between the client's own accounts
 * 
 * POST /swaps
 */
export const createApiSwaps = async (args: CreateApiSwapsArgs, options: CreateApiSwapsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (args['X-Hevn-Account'] != null) headers.set("X-Hevn-Account", String(args['X-Hevn-Account']))
if (args['Idempotency-Key'] != null) headers.set("Idempotency-Key", String(args['Idempotency-Key']))
if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

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