import {z} from 'zod'

export type TemplateTypeApi = 'QUESTIONNAIRE' | 'INVITE' | 'REMINDER' | 'DOUBLE_OPT_IN_REVIEW' | 'REVIEW_REPLY';

export type TemplateTransportApi = 'EMAIL' | 'SMS';

export type GetApiTemplatesArgs = {Authorization: string, type?: TemplateTypeApi | undefined, transport?: TemplateTransportApi | undefined, version?: string | undefined, isGlobal?: boolean | undefined, isDefault?: boolean | undefined, hasTranslations?: boolean | undefined};

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

export const templateTypeApi = z.enum(["QUESTIONNAIRE", "INVITE", "REMINDER", "DOUBLE_OPT_IN_REVIEW", "REVIEW_REPLY"]);

export const template = z.object({id: z.string().optional(), type: templateTypeApi.optional(), name: z.string().optional(), version: z.string().optional(), description: z.string().optional(), transport: z.string().optional(), path: z.string().optional(), locales: z.array(z.string()).optional(), isGlobal: z.boolean().optional(), isDefault: z.boolean().optional(), hasTranslations: z.boolean().optional(), createdAt: z.string().optional(), updatedAt: z.string().optional()});

export const templateList = z.array(template);

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 list of templates
 * 
 * GET /templates
 */
export const getApiTemplates = async (args: GetApiTemplatesArgs, options: GetApiTemplatesOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))
if (args.type != null) query.append("type", String(args.type))
if (args.transport != null) query.append("transport", String(args.transport))
if (args.version != null) query.append("version", String(args.version))
if (args.isGlobal != null) query.append("isGlobal", String(args.isGlobal))
if (args.isDefault != null) query.append("isDefault", String(args.isDefault))
if (args.hasTranslations != null) query.append("hasTranslations", String(args.hasTranslations))

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