import { invoke } from '@tauri-apps/api/core';

export interface LocalGatewayStatus {
  supported: boolean;
  cliAvailable: boolean;
  runtimeSource: string | null;
  runtimePath: string | null;
  serviceLabel: string | null;
  serviceLoaded: boolean;
  serviceStatus: string | null;
  configOk: boolean;
  port: number | null;
  portStatus: string | null;
  probeUrl: string | null;
  listenerPids: number[];
  error: string | null;
  raw: Record<string, unknown>;
}

export interface LocalGatewayAuth {
  configPath: string | null;
  gatewayToken: string | null;
}

export interface LocalGatewayPrepareResult {
  configPath: string | null;
  originsUpdated: boolean;
  gatewayRestarted: boolean;
}

export interface LocalGatewayPairingApprovalResult {
  approved: boolean;
  requestId: string | null;
  deviceId: string | null;
}

function buildFallbackStatus(supported: boolean, error: string | null = null): LocalGatewayStatus {
  return {
    supported,
    cliAvailable: false,
    runtimeSource: null,
    runtimePath: null,
    serviceLabel: null,
    serviceLoaded: false,
    serviceStatus: null,
    configOk: false,
    port: null,
    portStatus: null,
    probeUrl: null,
    listenerPids: [],
    error,
    raw: {},
  };
}

export function isTauriRuntime(): boolean {
  return typeof window !== 'undefined' && '__TAURI_INTERNALS__' in window;
}

async function callLocalGateway(command: string): Promise<LocalGatewayStatus> {
  if (!isTauriRuntime()) {
    return buildFallbackStatus(false);
  }

  return invoke<LocalGatewayStatus>(command);
}

export function getUnsupportedLocalGatewayStatus(): LocalGatewayStatus {
  return buildFallbackStatus(false);
}

export async function getLocalGatewayStatus(): Promise<LocalGatewayStatus> {
  return callLocalGateway('zclaw_status');
}

export async function startLocalGateway(): Promise<LocalGatewayStatus> {
  return callLocalGateway('zclaw_start');
}

export async function stopLocalGateway(): Promise<LocalGatewayStatus> {
  return callLocalGateway('zclaw_stop');
}

export async function restartLocalGateway(): Promise<LocalGatewayStatus> {
  return callLocalGateway('zclaw_restart');
}

export async function getLocalGatewayAuth(): Promise<LocalGatewayAuth> {
  if (!isTauriRuntime()) {
    return {
      configPath: null,
      gatewayToken: null,
    };
  }

  return invoke<LocalGatewayAuth>('zclaw_local_auth');
}

export async function prepareLocalGatewayForTauri(): Promise<LocalGatewayPrepareResult> {
  if (!isTauriRuntime()) {
    return {
      configPath: null,
      originsUpdated: false,
      gatewayRestarted: false,
    };
  }

  return invoke<LocalGatewayPrepareResult>('zclaw_prepare_for_tauri');
}

export async function approveLocalGatewayDevicePairing(deviceId: string, publicKeyBase64: string, url?: string): Promise<LocalGatewayPairingApprovalResult> {
  if (!isTauriRuntime()) {
    return {
      approved: false,
      requestId: null,
      deviceId: null,
    };
  }

  return invoke<LocalGatewayPairingApprovalResult>('zclaw_approve_device_pairing', {
    deviceId,
    publicKeyBase64,
    url,
  });
}

// ============================================================================
// Process Monitoring Types and Functions
// ============================================================================

export interface ProcessInfo {
  pid: number;
  name: string;
  status: string;
  cpuPercent: number | null;
  memoryMb: number | null;
  uptimeSeconds: number | null;
}

export interface ProcessListResponse {
  processes: ProcessInfo[];
  totalCount: number;
  runtimeSource: string | null;
}

export interface ProcessLogsResponse {
  pid: number | null;
  logs: string;
  lines: number;
  runtimeSource: string | null;
}

export interface VersionResponse {
  version: string;
  commit: string | null;
  buildDate: string | null;
  runtimeSource: string | null;
  raw: Record<string, unknown>;
}

/**
 * List ZCLAW processes
 * @returns List of running ZCLAW processes with their status
 */
export async function getZclawProcessList(): Promise<ProcessListResponse> {
  if (!isTauriRuntime()) {
    return {
      processes: [],
      totalCount: 0,
      runtimeSource: null,
    };
  }

  return invoke<ProcessListResponse>('zclaw_process_list');
}

/**
 * Get ZCLAW process logs
 * @param pid - Optional process ID to get logs for. If not specified, gets main process logs.
 * @param lines - Number of log lines to retrieve (default: 100)
 * @returns Process logs
 */
export async function getZclawProcessLogs(
  pid?: number,
  lines?: number
): Promise<ProcessLogsResponse> {
  if (!isTauriRuntime()) {
    return {
      pid: pid ?? null,
      logs: '',
      lines: 0,
      runtimeSource: null,
    };
  }

  return invoke<ProcessLogsResponse>('zclaw_process_logs', {
    pid,
    lines,
  });
}

/**
 * Get ZCLAW version information
 * @returns Version information including version string, commit hash, and build date
 */
export async function getZclawVersion(): Promise<VersionResponse> {
  if (!isTauriRuntime()) {
    return {
      version: 'unknown',
      commit: null,
      buildDate: null,
      runtimeSource: null,
      raw: {},
    };
  }

  return invoke<VersionResponse>('zclaw_version');
}