import {z} from 'zod'

export type GetApiApprovalArgs = {page?: number | undefined, pageSize?: number | undefined, sort?: string | undefined};

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

export const approverStatus = z.object({id: z.string().optional(), version: z.string().optional(), createdDate: z.number().int().optional(), groupId: z.string().optional(), lastModifiedDate: z.number().int().optional(), personId: z.string().optional(), positionNumber: z.number().int().optional(), status: z.enum(["APPROVED", "OPEN", "REJECTED"]).optional(), userId: z.string().optional()});

export const approval = z.object({id: z.string().optional(), version: z.string().optional(), active: z.boolean().optional(), approverStatuses: z.array(approverStatus).optional(), createdDate: z.number().int().optional(), currentApproverStatusId: z.string().optional(), currentStatusType: z.enum(["APPROVED", "OPEN", "REJECTED"]).optional(), entityId: z.string().optional(), entityName: z.string().optional(), lastModifiedDate: z.number().int().optional(), note: z.string().optional(), requesterId: z.string().optional(), ruleId: z.string().optional()});

export const getApiApprovalResponse = z.object({result: z.array(approval).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
};

/**
 * query approval
 * 
 * GET /approval
 */
export const getApiApproval = async (args: GetApiApprovalArgs, options: GetApiApprovalOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIToken} = options ?? {}

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

if (args.page != null) query.append("page", String(args.page))
if (args.pageSize != null) query.append("pageSize", String(args.pageSize))
if (args.sort != null) query.append("sort", String(args.sort))
if (APIToken !== undefined) headers.set("AuthenticationToken", APIToken)

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