import {z} from 'zod'

export type GetApiClientsArgs = {limit?: number | undefined, offset?: number | undefined};

export type GetApiClientsOptions = {baseUrl?: string | undefined, OAuth2?: string | undefined, fetch?: typeof fetch | undefined};

export const clientObject = z.object({id: z.number().int().gte(1), first_name: z.string(), last_name: z.string(), email: z.string(), phone: z.string().nullable(), invoice_to: z.enum(["me", "client"]), limited_account: z.boolean(), allowed_access: z.boolean(), activated_at: z.string().nullable()});

export const clientListResponse = z.object({count: z.number().int(), next: z.string().nullable(), previous: z.string().nullable(), results: z.array(clientObject)});

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
};

/**
 * Retrieve clients list
 * 
 * GET /clients/
 * 
 * Also accepts auth: PersonalAccessToken
 */
export const getApiClients = async (args: GetApiClientsArgs, options?: GetApiClientsOptions) => {
const {baseUrl = "https://api.angelcam.com/v1", fetch: fetchFn = fetch, OAuth2} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (args.offset != null) query.append("offset", String(args.offset))
if (OAuth2 !== undefined) headers.set('authorization', `Bearer ${OAuth2}`)

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