import {z} from 'zod'

export type ResourceCreatedUpdated = string;

export type GetApiTransactionsArgs = {Authorization: string, start?: number | undefined, limit?: number | undefined, sort?: ('created' | '-created' | 'updated' | '-updated') | undefined, status?: unknown, productName?: unknown, entityId?: unknown, entityType?: unknown, startCreated?: ResourceCreatedUpdated | undefined, endCreated?: ResourceCreatedUpdated | undefined, startUpdated?: ResourceCreatedUpdated | undefined, endUpdated?: ResourceCreatedUpdated | undefined};

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

export const resourceId = z.string();

export const entityRef = z.object({entityId: z.string().optional(), entityType: z.literal("urn:elli:encompass:loan").optional()});

export const productTransactionView = z.object({id: resourceId.optional(), partnerId: z.unknown().optional(), name: z.unknown().optional()});

export const resourceCreatedUpdated = z.string();

export const resourceCreatedUpdatedBy = z.string();

export const transactionSummaryView = z.object({id: resourceId.optional(), status: z.unknown().optional(), entityRef: entityRef.optional(), product: productTransactionView.optional(), application: z.unknown().optional(), created: resourceCreatedUpdated.optional(), createdBy: resourceCreatedUpdatedBy.optional(), updated: resourceCreatedUpdated.optional(), updatedBy: resourceCreatedUpdatedBy.optional()});

export const getApiTransactionsResponse = z.array(transactionSummaryView);

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 all transactions
 * 
 * GET /transactions
 */
export const getApiTransactions = async (args: GetApiTransactionsArgs, options?: GetApiTransactionsOptions) => {
const {baseUrl = "https://api.elliemae.com/oauth2/v1", fetch: fetchFn = fetch} = options ?? {}

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

if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))
if (args.start != null) query.append("start", String(args.start))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.sort != null) query.append("sort", String(args.sort))
if (args.status != null) query.append("status", String(args.status))
if (args.productName != null) query.append("productName", String(args.productName))
if (args.entityId != null) query.append("entityId", String(args.entityId))
if (args.entityType != null) query.append("entityType", String(args.entityType))
if (args.startCreated != null) query.append("startCreated", String(args.startCreated))
if (args.endCreated != null) query.append("endCreated", String(args.endCreated))
if (args.startUpdated != null) query.append("startUpdated", String(args.startUpdated))
if (args.endUpdated != null) query.append("endUpdated", String(args.endUpdated))

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