import {z} from 'zod'

export type BooksAPICategorizationSplit = {amount: number, description?: (unknown | null) | undefined, ledgerId: unknown, tagIds?: (Array<unknown> | null) | undefined};

export type BooksAPICategorizeTransactionItem = {journalEntryId: unknown, splits: Array<BooksAPICategorizationSplit>};

export type CategorizeBooksAPITransactionsRequest = {items: Array<BooksAPICategorizeTransactionItem>};

export type CreateApiBooksTransactionsCategorizeArgs = {booksId?: string | undefined, body: CategorizeBooksAPITransactionsRequest};

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

export const booksAPITransactionCategorizationLine = z.object({amount: z.number(), debitCredit: z.enum(["debit", "credit"]), ledgerId: z.string(), ledgerName: z.string(), lineEntryId: z.string()});

export const booksAPICategorizedTransaction = z.object({categorizationLines: z.array(booksAPITransactionCategorizationLine), journalEntryId: z.string()});

export const categorizeBooksAPITransactionsResponse = z.object({items: z.array(booksAPICategorizedTransaction)});

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
};

/**
 * Categorize or split transactions
 * 
 * POST /books/transactions/categorize
 */
export const createApiBooksTransactionsCategorize = async (args: CreateApiBooksTransactionsCategorizeArgs, options?: CreateApiBooksTransactionsCategorizeOptions) => {
const {baseUrl = "https://api.mercury.com/api/v1", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.booksId != null) query.append("booksId", String(args.booksId))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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