import {z} from 'zod'

export type CreateApiListsArgs = {body: {name: string, description?: string | undefined, form_enabled?: boolean | undefined, form_from?: string | undefined, redirect_url?: (string | null) | undefined, welcome?: ({enabled?: boolean | undefined, subject?: string | undefined, html?: string | undefined, markdown?: string | undefined, content?: (Record<string, never> | null) | undefined}) | undefined, site?: ({enabled?: boolean | undefined, slug?: (string | null) | undefined, title?: (string | null) | undefined, description?: (string | null) | undefined, accent?: (string | null) | undefined}) | undefined}};

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

export const createApiListsResponse = z.object({id: z.string(), name: z.string(), description: z.string(), form: z.object({enabled: z.boolean(), from: z.string(), redirectUrl: z.string(), url: z.string()}), counts: z.object({subscribed: z.number().int(), pending: z.number().int(), unsubscribed: z.number().int()}), welcome: z.object({enabled: z.boolean(), subject: z.string(), html: z.string(), content: z.unknown()}), site: z.object({enabled: z.boolean(), slug: z.string(), title: z.string(), description: z.string(), accent: z.string(), url: z.string()}), createdAt: z.string(), updatedAt: z.string()});

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
};

/**
 * Create a list with an optional signup form, welcome email, and newsletter site
 * 
 * POST /lists
 */
export const createApiLists = async (args: CreateApiListsArgs, options?: CreateApiListsOptions) => {
const {baseUrl = "https://sendhq.cc/api/v1", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/lists${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiListsResponse, await res.json())
};