import {z} from 'zod'

export type GetApiTemplateAllArgs = {metadataOnly?: boolean | undefined};

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

export const invokerTemplateResource = z.object({name: z.string().optional()});

export const ctorTemplateResource = z.object({nodeId: z.number().int().optional(), connectorId: z.number().int().optional(), title: z.string().optional(), invoker: invokerTemplateResource.optional(), methods: z.object({}).optional(), operators: z.object({}).optional()});

export const ctionTemplateResource = z.object({nodeId: z.number().int().optional(), connectionId: z.number().int().optional(), title: z.string().optional(), description: z.string().optional(), fromConnector: ctorTemplateResource.optional(), toConnector: ctorTemplateResource.optional(), fieldBinding: z.object({}).optional(), ui: z.record(z.string(), z.object({})).optional()});

export const templateResource = z.object({templateId: z.string().optional(), name: z.string().optional(), description: z.string().optional(), version: z.string().optional(), link: z.string().optional(), connection: ctionTemplateResource.optional()});

export const getApiTemplateAllResponse = z.array(templateResource);

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
};

/**
 * Retrieves all templates from database
 * 
 * GET /template/all
 */
export const getApiTemplateAll = async (args: GetApiTemplateAllArgs, options?: GetApiTemplateAllOptions) => {
const {baseUrl = "http://localhost:9090", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

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

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