import {z} from 'zod'

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

export const categoryData = z.object({type: z.string().optional(), id: z.string().optional(), attributes: z.object({name: z.string().optional(), description: z.string().optional(), is_resource: z.boolean().optional(), is_file: z.boolean().optional()}).optional(), links: z.object({self: z.string().optional()}).optional(), meta: z.array(z.unknown()).optional()});

export const links = z.object({first: z.string().optional(), last: z.string().optional(), prev: z.string().nullable().optional(), next: z.string().nullable().optional()});

export const link = z.object({url: z.string().nullable().optional(), label: z.string().optional(), active: z.boolean().optional()});

export const filterEcho = z.union([z.record(z.string(), z.unknown()), z.array(z.unknown())]);

export const meta = z.object({current_page: z.number().int().optional(), from: z.number().int().optional(), last_page: z.number().int().optional(), links: z.array(link).optional(), path: z.string().optional(), per_page: z.number().int().optional(), to: z.number().int().optional(), total: z.number().int().optional(), filter: filterEcho.optional(), sort: z.string().optional()});

export const categories = z.object({data: z.array(categoryData).optional(), links: links.optional(), meta: meta.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
};

/**
 * Returns a list of PIM Categories
 * 
 * GET /pim/categories
 */
export const getApiPimCategories = async (options: GetApiPimCategoriesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth2} = options ?? {}

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

if (OAuth2 !== undefined) headers.set('authorization', `Bearer ${OAuth2}`)

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