import {z} from 'zod'

export type RegistryResourceType = 'tool' | 'model' | 'db' | 'vector_db' | 'schema' | 'function' | 'agent' | 'team' | 'knowledge' | 'memory_manager' | 'session_summary_manager';

export type GetApiRegistryArgs = {resource_type?: (RegistryResourceType | null) | undefined, name?: (string | null) | undefined, page?: number | undefined, limit?: number | undefined};

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

export const registryResourceType = z.enum(["tool", "model", "db", "vector_db", "schema", "function", "agent", "team", "knowledge", "memory_manager", "session_summary_manager"]);

export const registryContentResponse = z.object({name: z.string(), type: registryResourceType, id: z.string().nullable().optional(), description: z.string().nullable().optional(), metadata: z.record(z.string(), z.unknown()).nullable().optional()});

export const paginationInfo = z.object({page: z.number().int().gte(0).optional(), limit: z.number().int().gte(1).optional(), total_pages: z.number().int().gte(0).optional(), total_count: z.number().int().gte(0).optional(), search_time_ms: z.number().gte(0).optional()});

export const paginatedResponseRegistryContentResponse = z.object({data: z.array(registryContentResponse), meta: paginationInfo});

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
};

/**
 * List Registry
 * 
 * GET /registry
 */
export const getApiRegistry = async (args: GetApiRegistryArgs, options: GetApiRegistryOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (args.resource_type != null) query.append("resource_type", String(args.resource_type))
if (args.name != null) query.append("name", String(args.name))
if (args.page != null) query.append("page", String(args.page))
if (args.limit != null) query.append("limit", String(args.limit))
if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

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