import {z} from 'zod'

export type GetApiEmployeesCountArgs = {group?: ('ACTIVE' | 'INVOLVED' | 'JOBLESS' | 'DEPARTING' | 'NEW_HIRES' | 'PAST') | undefined, employeeName?: string | undefined, departmentId?: string | undefined, skills?: string | undefined, skillsFiltering?: ('ANY' | 'ALL') | undefined, salaryFrom?: string | undefined, salaryTo?: string | undefined};

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

export const getApiEmployeesCountResponse = z.number().int();

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 total number of employees
 * 
 * GET /employees/count
 */
export const getApiEmployeesCount = async (args: GetApiEmployeesCountArgs, options?: GetApiEmployeesCountOptions) => {
const {baseUrl = "http://localhost:3000", fetch: fetchFn = fetch} = options ?? {}

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

if (args.group != null) query.append("group", String(args.group))
if (args.employeeName != null) query.append("employeeName", String(args.employeeName))
if (args.departmentId != null) query.append("departmentId", String(args.departmentId))
if (args.skills != null) query.append("skills", String(args.skills))
if (args.skillsFiltering != null) query.append("skillsFiltering", String(args.skillsFiltering))
if (args.salaryFrom != null) query.append("salaryFrom", String(args.salaryFrom))
if (args.salaryTo != null) query.append("salaryTo", String(args.salaryTo))

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