import {z} from 'zod'

export type GetApiHdDesksArgs = {host: string};

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

export const helpDeskDesk = z.union([z.object({kind: z.literal("desk"), desk_id: z.string(), handle: z.string(), canonical_host: z.string(), organization_name: z.string().nullable(), branding: z.object({color: z.string().nullable()}), auth_mode: z.enum(["identity", "email_pin", "identity_unavailable"]), identity: z.object({issuer_account_id: z.string(), client_id: z.string()}).nullable(), customer_can_mark_resolved: z.boolean(), knowledge_base_enabled: z.boolean(), portal_client: z.literal("help-desk-portal")}), z.object({kind: z.literal("moved"), moved_to: z.string()})]);

export const responseMeta = z.object({api_version: z.string().optional(), request_id: z.string().optional(), response_ms: z.number().int().optional(), timestamp: z.number().int().optional(), pools: z.object({}).optional(), billing: z.object({past_due: z.boolean().optional()}).optional(), quota: z.object({limit: z.number().int().optional(), used: z.number().int().optional(), remaining: z.number().int().optional(), resets_at: z.number().int().optional()}).optional()});

export const getApiHdDesksResponse = z.object({data: helpDeskDesk, meta: responseMeta.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
};

/**
 * Look up a help desk by its host
 * 
 * GET /hd/desks
 */
export const getApiHdDesks = async (args: GetApiHdDesksArgs, options?: GetApiHdDesksOptions) => {
const {baseUrl = "https://api.sparkvault.com/v1", fetch: fetchFn = fetch} = options ?? {}

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

if (args.host != null) query.append("host", String(args.host))

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