import {z} from 'zod'

export type GetApiReceiptsArgs = {ids: Array<string>, 'x-entity-id'?: string | undefined};

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

export const receiptMatchStatus = z.enum(["processing", "matched", "failed", "dismissed"]);

export const receiptMatchFailureReason = z.enum(["no_matching_transactions", "vendor_name_mismatch", "transaction_already_has_receipt", "document_not_receipt", "unreadable", "unsupported_currency"]);

export const receiptResponse = z.object({id: z.string(), filename: z.string(), match_status: receiptMatchStatus, match_failure_reason: receiptMatchFailureReason.nullable(), matched_transaction_id: z.string().nullable()});

export const receiptsResponse = z.object({data: z.array(receiptResponse)});

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 Receipts
 * 
 * GET /receipts
 */
export const getApiReceipts = async (args: GetApiReceiptsArgs, options?: GetApiReceiptsOptions) => {
const {baseUrl = "https://api.meow.com/v1", fetch: fetchFn = fetch, apiKeyAuth} = options ?? {}

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

for (const item of args.ids ?? []) query.append("ids", String(item))
if (args['x-entity-id'] != null) headers.set("x-entity-id", String(args['x-entity-id']))
if (apiKeyAuth !== undefined) headers.set("x-api-key", apiKeyAuth)

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