import {z} from 'zod'

export type EntryInputDto = {account_id: string, side: 'debit' | 'credit', amount: string};

export type PostTransactionDto = {reference: string, idempotency_key: string, entries: Array<EntryInputDto>};

export type CreateApiV1CustomerCreditsTransactionsArgs = {body: PostTransactionDto};

export type CreateApiV1CustomerCreditsTransactionsOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const entryResponseDto = z.object({id: z.string(), transaction_id: z.string(), account_id: z.string(), side: z.enum(["debit", "credit"]), amount: z.string(), created_at: z.string()});

export const transactionResponseDto = z.object({id: z.string(), store_id: z.string(), reference: z.string(), idempotency_key: z.string(), reversal_of: z.string().nullable().optional(), entries: z.array(entryResponseDto), created_at: 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
};

/**
 * Post a transaction
 * 
 * POST /v1/customer-credits/transactions
 */
export const createApiV1CustomerCreditsTransactions = async (args: CreateApiV1CustomerCreditsTransactionsArgs, options?: CreateApiV1CustomerCreditsTransactionsOptions) => {
const {baseUrl = "https://api.creem.io", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (ApiKey !== undefined) headers.set("x-api-key", ApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/customer-credits/transactions${query.size > 0 ? `?${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(transactionResponseDto, await res.json())
};