import {z} from 'zod'

export type GetApiV3SpendBudgetsBudgetIdMembersArgs = {apiToken?: (string | null) | undefined, budgetId: string, max?: (number | null) | undefined, nextPage?: (string | null) | undefined, prevPage?: (string | null) | undefined, sort?: (string | null) | undefined, filters?: (string | null) | undefined};

export type GetApiV3SpendBudgetsBudgetIdMembersOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const budgetMemberResponseDto = z.object({userId: z.string().optional(), userUuid: z.string().optional(), spent: z.number().optional(), limit: z.number().optional(), recurringLimit: z.number().optional(), recurring: z.boolean().optional(), budgetRole: z.enum(["MEMBER", "OWNER", "OBSERVER"]).optional(), name: z.string().optional(), retired: z.boolean().optional(), shareBudgetFunds: z.boolean().optional()});

export const paginatedBudgetMemberResponseDto = z.object({nextPage: z.string().optional(), prevPage: z.string().optional(), results: z.array(budgetMemberResponseDto).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
};

/**
 * Get list of budget members
 * 
 * GET /v3/spend/budgets/{budgetId}/members
 */
export const getApiV3SpendBudgetsBudgetIdMembers = async (args: GetApiV3SpendBudgetsBudgetIdMembersArgs, options?: GetApiV3SpendBudgetsBudgetIdMembersOptions) => {
const {baseUrl = "https://gateway.stage.bill.com/connect", fetch: fetchFn = fetch} = options ?? {}

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

if (args.apiToken != null) headers.set("apiToken", String(args.apiToken))
if (args.max != null) query.append("max", String(args.max))
if (args.nextPage != null) query.append("nextPage", String(args.nextPage))
if (args.prevPage != null) query.append("prevPage", String(args.prevPage))
if (args.sort != null) query.append("sort", String(args.sort))
if (args.filters != null) query.append("filters", String(args.filters))

const url = `${baseUrl.replace(/\/+$/, '')}/v3/spend/budgets/${encodeURIComponent(String(args.budgetId))}/members${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(paginatedBudgetMemberResponseDto, await res.json())
};