import {z} from 'zod'

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

export const contentPageType = z.enum(["INFO", "LEGAL", "MARKETING"]);

export const contentPageHeadingFont = z.enum(["FUN", "NORMAL"]);

export const contentBlockType = z.enum(["CARD_SET", "LINK_SET", "BAG_SELECTION", "PRODUCT_SELECTION", "REORDER", "SOCIAL_PROOF", "HTML"]);

export const contentBlockHeader = z.object({id: z.number().int(), modified: z.string(), sortOrder: z.number().int().gte(0)});

export const contentBlockDefinitionProperties = z.object({});

export const contentBlockDefinition = z.object({type: contentBlockType, header: contentBlockHeader, properties: contentBlockDefinitionProperties});

export const contentPage = z.object({id: z.number().int(), type: contentPageType, uri: z.string().min(1), title: z.string().min(1), subtitle: z.string().nullable().optional(), description: z.string().min(1), signupQueryParameters: z.record(z.string(), z.string()).nullable().optional(), previewImageUrl: z.string().nullable().optional(), headingFont: contentPageHeadingFont, isSystem: z.boolean(), isLandingPage: z.boolean(), isPublished: z.boolean(), blockDefinitions: z.array(contentBlockDefinition)});

export const getApiContentPagesResponse = z.array(contentPage);

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 /content-pages
 */
export const getApiContentPages = async (options: GetApiContentPagesOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

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