import {z} from 'zod'

export type GetApiApiExternalV1PagesDesignArgs = {workspace_id: number, campaign_id: number};

export type GetApiApiExternalV1PagesDesignOptions = {baseUrl?: string | undefined, defaultValue?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiApiExternalV1PagesDesignResponse = z.union([z.object({campaign_id: z.number().int().optional(), has_design: z.boolean().optional(), is_live: z.boolean().optional(), has_unpublished_changes: z.boolean().optional(), html: z.string().optional(), css: z.string().optional(), updated_at: z.string().optional(), note: z.string().optional()}), z.object({campaign_id: z.number().int().optional(), has_design: z.boolean().optional(), is_live: z.boolean().optional(), html: z.string().optional(), css: z.string().optional(), note: z.string().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
};

/**
 * Get a campaign's current page design.
 * 
 * GET /api/external/v1/pages/design
 */
export const getApiApiExternalV1PagesDesign = async (args: GetApiApiExternalV1PagesDesignArgs, options?: GetApiApiExternalV1PagesDesignOptions) => {
const {baseUrl = "https://backend.genpage.ai", fetch: fetchFn = fetch, defaultValue} = options ?? {}

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

if (args.workspace_id != null) query.append("workspace_id", String(args.workspace_id))
if (args.campaign_id != null) query.append("campaign_id", String(args.campaign_id))
if (defaultValue !== undefined) headers.set('authorization', `Bearer ${defaultValue}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/external/v1/pages/design${query.size > 0 ? `?${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(getApiApiExternalV1PagesDesignResponse, await res.json())
};