import {z} from 'zod'

export type EmployeeStatus = 'ONBOARDING' | 'ACTIVE' | 'OFFBOARDING' | 'ENDED' | 'DELETED' | 'ALL';

export type SortByField = 'startOn';

export type SortOrder = 'ASC' | 'DESC';

export type GetApiV1EmployeesArgs = {page?: number | undefined, pageSize?: number | undefined, status?: EmployeeStatus | undefined, employeeId?: string | undefined, employeeCode?: string | undefined, sortBy?: SortByField | undefined, sortOrder?: SortOrder | undefined};

export type GetApiV1EmployeesOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const employeeData = z.object({id: z.string(), employeeCode: z.string().nullable().optional(), employeeId: z.string().nullable().optional(), firstName: z.string(), middleName: z.string().nullable().optional(), lastName: z.string(), fullName: z.string(), displayName: z.string(), workEmail: z.string().nullable().optional(), designation: z.string(), department: z.string().nullable().optional(), status: z.enum(["ONBOARDING", "ACTIVE", "OFFBOARDING", "ENDED", "DELETED", "UNKNOWN"]), type: z.enum(["EMPLOYEE", "CONTRACTOR", "FREELANCER", "HR_MEMBER", "UNKNOWN"]), startDate: z.string(), endDate: z.string().nullable().optional(), country: z.string(), customerId: z.string(), customerName: z.string(), entity: z.string().nullable().optional()});

export const pagination = z.object({page: z.number().int(), pageSize: z.number().int(), totalCount: z.number().int(), totalPages: z.number().int()});

export const v1EmployeesGetResponse = z.object({data: z.array(employeeData), pagination: pagination});

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
};

/**
 * Search and list employees
 * 
 * GET /v1/employees
 */
export const getApiV1Employees = async (args: GetApiV1EmployeesArgs, options?: GetApiV1EmployeesOptions) => {
const {baseUrl = "https://api.usemultiplier.com", fetch: fetchFn = fetch, BearerAuth} = 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.status != null) query.append("status", String(args.status))
if (args.employeeId != null) query.append("employeeId", String(args.employeeId))
if (args.employeeCode != null) query.append("employeeCode", String(args.employeeCode))
if (args.sortBy != null) query.append("sortBy", String(args.sortBy))
if (args.sortOrder != null) query.append("sortOrder", String(args.sortOrder))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/employees${query.size > 0 ? `?${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(v1EmployeesGetResponse, await res.json())
};