import {z} from 'zod'

export type GetApiCategoriesArgs = {parent_category_id?: number | undefined, parent_forum_id?: number | undefined, order?: ('natural' | 'list') | undefined};

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

export const categoryModel = z.object({category_id: z.number().int(), category_title: z.string(), category_description: z.string(), icon_content: z.string(), active_icon_content: z.string(), links: z.object({permalink: z.string(), detail: z.string(), "sub-categories": z.string(), "sub-forums": z.string()}), permissions: z.object({view: z.boolean(), edit: z.boolean(), delete: z.boolean()})});

export const respSystemInfo = z.object({visitor_id: z.number().int(), time: z.number().int(), log_id: z.number().int()});

export const getApiCategoriesResponse = z.object({categories: z.array(categoryModel), categories_total: z.number().int(), system_info: respSystemInfo});

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 Categories
 * 
 * GET /categories
 */
export const getApiCategories = async (args: GetApiCategoriesArgs, options?: GetApiCategoriesOptions) => {
const {baseUrl = "https://api.lolz.team", fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (args.parent_category_id != null) query.append("parent_category_id", String(args.parent_category_id))
if (args.parent_forum_id != null) query.append("parent_forum_id", String(args.parent_forum_id))
if (args.order != null) query.append("order", String(args.order))
if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/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(getApiCategoriesResponse, await res.json())
};