import {z} from 'zod'

export type GetApiFormsArgs = {page?: number | undefined, limit?: number | undefined};

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

export const resourceIdentifier = z.object({type: z.string(), id: z.string()});

export const links = z.object({self: z.string().optional()});

export const formResource = z.object({type: z.literal("forms").optional(), id: z.string().optional(), attributes: z.object({title: z.string().optional(), form_setting: z.object({}).optional(), magnet_type: z.enum(["NONE", "DOWNLOAD", "LINK"]).optional(), magnet_url: z.string().nullable().optional(), magnet_file_src: z.string().nullable().optional(), submit_email_setting: z.object({}).nullable().optional(), thx_msg_setting: z.object({}).nullable().optional(), created_at: z.string().optional(), response_count: z.number().int().optional()}).optional(), relationships: z.object({form_responses: z.object({data: z.array(resourceIdentifier).optional()}).optional()}).optional(), links: links.optional()});

export const meta = z.object({total: z.number().int().optional(), page: z.number().int().optional(), limit: z.number().int().optional(), totalPages: z.number().int().optional()});

export const formListResponse = z.object({jsonapi: z.object({version: z.string()}), data: z.array(formResource).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
};

/**
 * List Forms
 * 
 * GET /forms
 */
export const getApiForms = async (args: GetApiFormsArgs, options?: GetApiFormsOptions) => {
const {baseUrl = "https://inblog.ai/api/v1", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

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

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