import {z} from 'zod'

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

export const mCPUserSummary = z.object({id: z.string().optional(), name: z.string().optional()});

export const mCPVirtualKeySummary = z.object({id: z.string().optional(), name: z.string().optional()});

export const mCPClientSummary = z.object({client_id: z.string().optional(), name: z.string().optional()});

export const mCPSessionRow = z.object({id: z.string(), kind: z.enum(["token", "header", "flow"]), auth_kind: z.enum(["oauth", "headers"]), auth_mode: z.enum(["user", "vk", "session"]), user_id: z.string().nullable().optional(), user: mCPUserSummary.optional(), virtual_key: mCPVirtualKeySummary.optional(), mcp_client: mCPClientSummary.optional(), session_id: z.string().nullable().optional(), status: z.enum(["active", "orphaned", "pending", "needs_reauth", "needs_update"]), expires_at: z.string().nullable().optional(), created_at: z.string(), last_refreshed_at: z.string().nullable().optional(), updated_at: z.string().nullable().optional(), oauth_config_id: z.string().nullable().optional(), can_reauth: z.boolean()});

export const mCPSessionsListResponse = z.object({sessions: z.array(mCPSessionRow)});

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 MCP sessions
 * 
 * GET /api/mcp/sessions
 */
export const getApiApiMcpSessions = async (options?: GetApiApiMcpSessionsOptions) => {
const {baseUrl = "http://localhost:8080", fetch: fetchFn = fetch, ManagementBearerAuth} = options ?? {}

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

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

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