import { assert, assertEquals, assertExists } from 'jsr:@std/assert@^1.0.0';
import { NupstSnmp } from '../ts/snmp/manager.ts';
import { UpsOidSets } from '../ts/snmp/oid-sets.ts';
import type { IOidSet, ISnmpConfig, TUpsModel } from '../ts/snmp/types.ts';
import {
  analyzeConfigReload,
  shouldRefreshPauseState,
  shouldReloadConfig,
} from '../ts/config-watch.ts';
import { type IPauseState, loadPauseSnapshot } from '../ts/pause-state.ts';
import { shortId } from '../ts/helpers/shortid.ts';
import { HTTP_SERVER, SNMP, THRESHOLDS, TIMING, UI } from '../ts/constants.ts';
import { Action, type IActionContext } from '../ts/actions/base-action.ts';
import {
  applyDefaultShutdownDelay,
  buildUpsActionContext,
  decideUpsActionExecution,
} from '../ts/action-orchestration.ts';
import {
  buildShutdownErrorRow,
  buildShutdownStatusRow,
  selectEmergencyCandidate,
} from '../ts/shutdown-monitoring.ts';
import {
  buildFailedUpsPollSnapshot,
  buildSuccessfulUpsPollSnapshot,
  hasThresholdViolation,
} from '../ts/ups-monitoring.ts';
import { createInitialUpsStatus } from '../ts/ups-status.ts';

import * as qenv from 'npm:@push.rocks/qenv@^6.0.0';
const testQenv = new qenv.Qenv('./', '.nogit/');

// =============================================================================
// UNIT TESTS - No external dependencies required
// =============================================================================

// -----------------------------------------------------------------------------
// shortId() Tests
// -----------------------------------------------------------------------------

Deno.test('shortId: generates 6-character string', () => {
  const id = shortId();
  assertEquals(id.length, 6);
});

Deno.test('shortId: contains only alphanumeric characters', () => {
  const id = shortId();
  const alphanumericRegex = /^[a-zA-Z0-9]+$/;
  assert(alphanumericRegex.test(id), `ID "${id}" contains non-alphanumeric characters`);
});

Deno.test('shortId: generates unique IDs', () => {
  const ids = new Set<string>();
  const count = 100;

  for (let i = 0; i < count; i++) {
    ids.add(shortId());
  }

  // All IDs should be unique (statistically extremely likely for 100 IDs)
  assertEquals(ids.size, count, 'Generated IDs should be unique');
});

// -----------------------------------------------------------------------------
// Constants Tests
// -----------------------------------------------------------------------------

Deno.test('TIMING constants: all values are positive numbers', () => {
  for (const [key, value] of Object.entries(TIMING)) {
    assert(typeof value === 'number', `TIMING.${key} should be a number`);
    assert(value > 0, `TIMING.${key} should be positive`);
  }
});

Deno.test('SNMP constants: port is 161', () => {
  assertEquals(SNMP.DEFAULT_PORT, 161);
});

Deno.test('SNMP constants: timeouts increase with security level', () => {
  assert(
    SNMP.TIMEOUT_NO_AUTH_MS <= SNMP.TIMEOUT_AUTH_MS,
    'Auth timeout should be >= noAuth timeout',
  );
  assert(
    SNMP.TIMEOUT_AUTH_MS <= SNMP.TIMEOUT_AUTH_PRIV_MS,
    'AuthPriv timeout should be >= Auth timeout',
  );
});

Deno.test('THRESHOLDS constants: defaults are reasonable', () => {
  assert(THRESHOLDS.DEFAULT_BATTERY_PERCENT > 0 && THRESHOLDS.DEFAULT_BATTERY_PERCENT <= 100);
  assert(THRESHOLDS.DEFAULT_RUNTIME_MINUTES > 0);
  assert(THRESHOLDS.EMERGENCY_RUNTIME_MINUTES < THRESHOLDS.DEFAULT_RUNTIME_MINUTES);
});

Deno.test('HTTP_SERVER constants: valid defaults', () => {
  assertEquals(HTTP_SERVER.DEFAULT_PORT, 8080);
  assert(HTTP_SERVER.DEFAULT_PATH.startsWith('/'));
});

Deno.test('UI constants: box widths are ascending', () => {
  assert(UI.DEFAULT_BOX_WIDTH < UI.WIDE_BOX_WIDTH);
  assert(UI.WIDE_BOX_WIDTH < UI.EXTRA_WIDE_BOX_WIDTH);
});

// -----------------------------------------------------------------------------
// Pause State Tests
// -----------------------------------------------------------------------------

Deno.test('loadPauseSnapshot: reports paused state for valid pause file', async () => {
  const tempDir = await Deno.makeTempDir();
  const pauseFilePath = `${tempDir}/pause.json`;
  const pauseState: IPauseState = {
    pausedAt: 1000,
    pausedBy: 'cli',
    reason: 'maintenance',
    resumeAt: 5000,
  };

  try {
    await Deno.writeTextFile(pauseFilePath, JSON.stringify(pauseState));

    const snapshot = loadPauseSnapshot(pauseFilePath, false, 2000);

    assertEquals(snapshot.isPaused, true);
    assertEquals(snapshot.pauseState, pauseState);
    assertEquals(snapshot.transition, 'paused');
  } finally {
    await Deno.remove(tempDir, { recursive: true });
  }
});

Deno.test('loadPauseSnapshot: auto-resumes expired pause file', async () => {
  const tempDir = await Deno.makeTempDir();
  const pauseFilePath = `${tempDir}/pause.json`;
  const pauseState: IPauseState = {
    pausedAt: 1000,
    pausedBy: 'cli',
    resumeAt: 1500,
  };

  try {
    await Deno.writeTextFile(pauseFilePath, JSON.stringify(pauseState));

    const snapshot = loadPauseSnapshot(pauseFilePath, true, 2000);

    assertEquals(snapshot.isPaused, false);
    assertEquals(snapshot.pauseState, null);
    assertEquals(snapshot.transition, 'autoResumed');

    let fileExists = true;
    try {
      await Deno.stat(pauseFilePath);
    } catch {
      fileExists = false;
    }
    assertEquals(fileExists, false);
  } finally {
    await Deno.remove(tempDir, { recursive: true });
  }
});

Deno.test('loadPauseSnapshot: reports resumed when pause file disappears', async () => {
  const tempDir = await Deno.makeTempDir();

  try {
    const snapshot = loadPauseSnapshot(`${tempDir}/pause.json`, true, 2000);

    assertEquals(snapshot.isPaused, false);
    assertEquals(snapshot.pauseState, null);
    assertEquals(snapshot.transition, 'resumed');
  } finally {
    await Deno.remove(tempDir, { recursive: true });
  }
});

// -----------------------------------------------------------------------------
// Config Watch Tests
// -----------------------------------------------------------------------------

Deno.test('shouldReloadConfig: matches modify events for config.json', () => {
  assertEquals(
    shouldReloadConfig({ kind: 'modify', paths: ['/etc/nupst/config.json'] }),
    true,
  );
  assertEquals(
    shouldReloadConfig({ kind: 'create', paths: ['/etc/nupst/config.json'] }),
    false,
  );
  assertEquals(
    shouldReloadConfig({ kind: 'modify', paths: ['/etc/nupst/other.json'] }),
    false,
  );
});

Deno.test('shouldRefreshPauseState: matches create/modify/remove pause events', () => {
  assertEquals(
    shouldRefreshPauseState({ kind: 'create', paths: ['/etc/nupst/pause'] }),
    true,
  );
  assertEquals(
    shouldRefreshPauseState({ kind: 'remove', paths: ['/etc/nupst/pause'] }),
    true,
  );
  assertEquals(
    shouldRefreshPauseState({ kind: 'modify', paths: ['/etc/nupst/config.json'] }),
    false,
  );
});

Deno.test('analyzeConfigReload: detects monitoring start and device count changes', () => {
  assertEquals(analyzeConfigReload(0, 2), {
    transition: 'monitoringWillStart',
    message: 'Configuration reloaded! Found 2 UPS device(s)',
    shouldInitializeUpsStatus: false,
    shouldLogMonitoringStart: true,
  });

  assertEquals(analyzeConfigReload(2, 3), {
    transition: 'deviceCountChanged',
    message: 'Configuration reloaded! UPS devices: 2 -> 3',
    shouldInitializeUpsStatus: true,
    shouldLogMonitoringStart: false,
  });

  assertEquals(analyzeConfigReload(2, 2), {
    transition: 'reloaded',
    message: 'Configuration reloaded successfully',
    shouldInitializeUpsStatus: false,
    shouldLogMonitoringStart: false,
  });
});

// -----------------------------------------------------------------------------
// UPS Status Tests
// -----------------------------------------------------------------------------

Deno.test('createInitialUpsStatus: creates default daemon UPS status shape', () => {
  assertEquals(createInitialUpsStatus({ id: 'ups-1', name: 'Main UPS' }, 1234), {
    id: 'ups-1',
    name: 'Main UPS',
    powerStatus: 'unknown',
    batteryCapacity: 100,
    batteryRuntime: 999,
    outputLoad: 0,
    outputPower: 0,
    outputVoltage: 0,
    outputCurrent: 0,
    lastStatusChange: 1234,
    lastCheckTime: 0,
    consecutiveFailures: 0,
    unreachableSince: 0,
  });
});

// -----------------------------------------------------------------------------
// Action Orchestration Tests
// -----------------------------------------------------------------------------

Deno.test('buildUpsActionContext: includes previous power status and timestamp', () => {
  const status = {
    ...createInitialUpsStatus({ id: 'ups-1', name: 'Main UPS' }, 1000),
    powerStatus: 'onBattery' as const,
    batteryCapacity: 42,
    batteryRuntime: 15,
  };
  const previousStatus = {
    ...createInitialUpsStatus({ id: 'ups-1', name: 'Main UPS' }, 500),
    powerStatus: 'online' as const,
  };

  assertEquals(
    buildUpsActionContext(
      { id: 'ups-1', name: 'Main UPS' },
      status,
      previousStatus,
      'thresholdViolation',
      9999,
    ),
    {
      upsId: 'ups-1',
      upsName: 'Main UPS',
      powerStatus: 'onBattery',
      batteryCapacity: 42,
      batteryRuntime: 15,
      previousPowerStatus: 'online',
      timestamp: 9999,
      triggerReason: 'thresholdViolation',
    },
  );
});

Deno.test('decideUpsActionExecution: suppresses actions while paused', () => {
  const decision = decideUpsActionExecution(
    true,
    { id: 'ups-1', name: 'Main UPS', actions: [{ type: 'shutdown' }] },
    createInitialUpsStatus({ id: 'ups-1', name: 'Main UPS' }, 1000),
    undefined,
    'powerStatusChange',
    9999,
  );

  assertEquals(decision, {
    type: 'suppressed',
    message: '[PAUSED] Actions suppressed for UPS Main UPS (trigger: powerStatusChange)',
  });
});

Deno.test('decideUpsActionExecution: falls back to legacy shutdown without actions', () => {
  const decision = decideUpsActionExecution(
    false,
    { id: 'ups-1', name: 'Main UPS' },
    createInitialUpsStatus({ id: 'ups-1', name: 'Main UPS' }, 1000),
    undefined,
    'thresholdViolation',
    9999,
  );

  assertEquals(decision, {
    type: 'legacyShutdown',
    reason: 'UPS "Main UPS" battery or runtime below threshold',
  });
});

Deno.test('decideUpsActionExecution: returns executable action plan when actions exist', () => {
  const decision = decideUpsActionExecution(
    false,
    { id: 'ups-1', name: 'Main UPS', actions: [{ type: 'shutdown' }] },
    {
      ...createInitialUpsStatus({ id: 'ups-1', name: 'Main UPS' }, 1000),
      powerStatus: 'onBattery',
      batteryCapacity: 55,
      batteryRuntime: 18,
    },
    {
      ...createInitialUpsStatus({ id: 'ups-1', name: 'Main UPS' }, 500),
      powerStatus: 'online',
    },
    'powerStatusChange',
    9999,
  );

  assertEquals(decision, {
    type: 'execute',
    actions: [{ type: 'shutdown' }],
    context: {
      upsId: 'ups-1',
      upsName: 'Main UPS',
      powerStatus: 'onBattery',
      batteryCapacity: 55,
      batteryRuntime: 18,
      previousPowerStatus: 'online',
      timestamp: 9999,
      triggerReason: 'powerStatusChange',
    },
  });
});

Deno.test('applyDefaultShutdownDelay: applies only to shutdown actions without explicit delay', () => {
  const actions = [
    { type: 'shutdown' as const },
    { type: 'shutdown' as const, shutdownDelay: 0 },
    { type: 'shutdown' as const, shutdownDelay: 9 },
    { type: 'webhook' as const },
  ];

  assertEquals(applyDefaultShutdownDelay(actions, 7), [
    { type: 'shutdown', shutdownDelay: 7 },
    { type: 'shutdown', shutdownDelay: 0 },
    { type: 'shutdown', shutdownDelay: 9 },
    { type: 'webhook' },
  ]);
});

// -----------------------------------------------------------------------------
// Shutdown Monitoring Tests
// -----------------------------------------------------------------------------

Deno.test('buildShutdownStatusRow: marks critical rows below emergency runtime threshold', () => {
  const snapshot = buildShutdownStatusRow(
    'Main UPS',
    {
      powerStatus: 'onBattery',
      batteryCapacity: 25,
      batteryRuntime: 4,
      outputLoad: 15,
      outputPower: 100,
      outputVoltage: 230,
      outputCurrent: 0.4,
      raw: {},
    },
    5,
    {
      battery: (value) => `B:${value}`,
      runtime: (value) => `R:${value}`,
      ok: (text) => `ok:${text}`,
      critical: (text) => `critical:${text}`,
      error: (text) => `error:${text}`,
    },
  );

  assertEquals(snapshot.isCritical, true);
  assertEquals(snapshot.row, {
    name: 'Main UPS',
    battery: 'B:25',
    runtime: 'R:4',
    status: 'critical:CRITICAL!',
  });
});

Deno.test('buildShutdownErrorRow: builds shutdown error table row', () => {
  assertEquals(buildShutdownErrorRow('Main UPS', (text) => `error:${text}`), {
    name: 'Main UPS',
    battery: 'error:N/A',
    runtime: 'error:N/A',
    status: 'error:ERROR',
  });
});

Deno.test('selectEmergencyCandidate: keeps first critical UPS candidate', () => {
  const firstCandidate = selectEmergencyCandidate(
    null,
    { id: 'ups-1', name: 'UPS 1' },
    {
      powerStatus: 'onBattery',
      batteryCapacity: 40,
      batteryRuntime: 4,
      outputLoad: 10,
      outputPower: 60,
      outputVoltage: 230,
      outputCurrent: 0.3,
      raw: {},
    },
    5,
  );

  const secondCandidate = selectEmergencyCandidate(
    firstCandidate,
    { id: 'ups-2', name: 'UPS 2' },
    {
      powerStatus: 'onBattery',
      batteryCapacity: 30,
      batteryRuntime: 3,
      outputLoad: 15,
      outputPower: 70,
      outputVoltage: 230,
      outputCurrent: 0.4,
      raw: {},
    },
    5,
  );

  assertEquals(secondCandidate, firstCandidate);
});

// -----------------------------------------------------------------------------
// UPS Monitoring Tests
// -----------------------------------------------------------------------------

Deno.test('buildSuccessfulUpsPollSnapshot: marks recovery from unreachable', () => {
  const currentStatus = {
    ...createInitialUpsStatus({ id: 'ups-1', name: 'Main UPS' }, 1000),
    powerStatus: 'unreachable' as const,
    unreachableSince: 2000,
    consecutiveFailures: 3,
  };

  const snapshot = buildSuccessfulUpsPollSnapshot(
    { id: 'ups-1', name: 'Main UPS' },
    {
      powerStatus: 'online',
      batteryCapacity: 95,
      batteryRuntime: 40,
      outputLoad: 10,
      outputPower: 50,
      outputVoltage: 230,
      outputCurrent: 0.5,
      raw: {},
    },
    currentStatus,
    8000,
  );

  assertEquals(snapshot.transition, 'recovered');
  assertEquals(snapshot.downtimeSeconds, 6);
  assertEquals(snapshot.updatedStatus.powerStatus, 'online');
  assertEquals(snapshot.updatedStatus.consecutiveFailures, 0);
  assertEquals(snapshot.updatedStatus.lastStatusChange, 8000);
});

Deno.test('buildFailedUpsPollSnapshot: marks UPS unreachable at failure threshold', () => {
  const currentStatus = {
    ...createInitialUpsStatus({ id: 'ups-1', name: 'Main UPS' }, 1000),
    powerStatus: 'onBattery' as const,
    consecutiveFailures: 2,
  };

  const snapshot = buildFailedUpsPollSnapshot(
    { id: 'ups-1', name: 'Main UPS' },
    currentStatus,
    9000,
  );

  assertEquals(snapshot.transition, 'unreachable');
  assertEquals(snapshot.failures, 3);
  assertEquals(snapshot.updatedStatus.powerStatus, 'unreachable');
  assertEquals(snapshot.updatedStatus.unreachableSince, 9000);
  assertEquals(snapshot.updatedStatus.lastStatusChange, 9000);
});

Deno.test('hasThresholdViolation: only fires on battery when any action threshold is exceeded', () => {
  assertEquals(
    hasThresholdViolation('online', 40, 10, [
      { type: 'shutdown', thresholds: { battery: 50, runtime: 20 } },
    ]),
    false,
  );

  assertEquals(
    hasThresholdViolation('onBattery', 40, 10, [
      { type: 'shutdown', thresholds: { battery: 50, runtime: 20 } },
    ]),
    true,
  );

  assertEquals(
    hasThresholdViolation('onBattery', 90, 60, [
      { type: 'shutdown', thresholds: { battery: 50, runtime: 20 } },
    ]),
    false,
  );
});

// -----------------------------------------------------------------------------
// UpsOidSets Tests
// -----------------------------------------------------------------------------

const UPS_MODELS: TUpsModel[] = ['cyberpower', 'apc', 'eaton', 'tripplite', 'liebert', 'custom'];

Deno.test('UpsOidSets: all models have OID sets', () => {
  for (const model of UPS_MODELS) {
    const oidSet = UpsOidSets.getOidSet(model);
    assertExists(oidSet, `OID set for ${model} should exist`);
  }
});

Deno.test('UpsOidSets: all non-custom models have complete OIDs', () => {
  const requiredOids = ['POWER_STATUS', 'BATTERY_CAPACITY', 'BATTERY_RUNTIME', 'OUTPUT_LOAD'];

  for (const model of UPS_MODELS.filter((m) => m !== 'custom')) {
    const oidSet = UpsOidSets.getOidSet(model);

    for (const oid of requiredOids) {
      const value = oidSet[oid as keyof IOidSet];
      assert(
        typeof value === 'string' && value.length > 0,
        `${model} should have non-empty ${oid}`,
      );
    }
  }
});

Deno.test('UpsOidSets: power status values defined for non-custom models', () => {
  for (const model of UPS_MODELS.filter((m) => m !== 'custom')) {
    const oidSet = UpsOidSets.getOidSet(model);
    assertExists(oidSet.POWER_STATUS_VALUES, `${model} should have POWER_STATUS_VALUES`);
    assertExists(oidSet.POWER_STATUS_VALUES?.online, `${model} should have online value`);
    assertExists(oidSet.POWER_STATUS_VALUES?.onBattery, `${model} should have onBattery value`);
  }
});

Deno.test('UpsOidSets: getStandardOids returns RFC 1628 OIDs', () => {
  const standardOids = UpsOidSets.getStandardOids();

  assert('power status' in standardOids);
  assert('battery capacity' in standardOids);
  assert('battery runtime' in standardOids);

  // RFC 1628 OIDs start with 1.3.6.1.2.1.33
  for (const oid of Object.values(standardOids)) {
    assert(oid.startsWith('1.3.6.1.2.1.33'), `Standard OID should be RFC 1628: ${oid}`);
  }
});

// -----------------------------------------------------------------------------
// Action Base Class Tests
// -----------------------------------------------------------------------------

// Create a concrete implementation for testing
class TestAction extends Action {
  readonly type = 'test';
  executeCallCount = 0;

  execute(_context: IActionContext): Promise<void> {
    this.executeCallCount++;
    return Promise.resolve();
  }

  // Expose protected methods for testing
  public testShouldExecute(context: IActionContext): boolean {
    return this.shouldExecute(context);
  }

  public testAreThresholdsExceeded(batteryCapacity: number, batteryRuntime: number): boolean {
    return this.areThresholdsExceeded(batteryCapacity, batteryRuntime);
  }
}

function createMockContext(overrides: Partial<IActionContext> = {}): IActionContext {
  return {
    upsId: 'test-ups',
    upsName: 'Test UPS',
    powerStatus: 'online',
    batteryCapacity: 100,
    batteryRuntime: 60,
    previousPowerStatus: 'online',
    timestamp: Date.now(),
    triggerReason: 'powerStatusChange',
    ...overrides,
  };
}

Deno.test('Action.areThresholdsExceeded: returns false when no thresholds configured', () => {
  const action = new TestAction({ type: 'shutdown' });
  assertEquals(action.testAreThresholdsExceeded(50, 30), false);
});

Deno.test('Action.areThresholdsExceeded: returns true when battery below threshold', () => {
  const action = new TestAction({
    type: 'shutdown',
    thresholds: { battery: 60, runtime: 20 },
  });

  assertEquals(action.testAreThresholdsExceeded(59, 30), true); // Battery below
  assertEquals(action.testAreThresholdsExceeded(60, 30), false); // Battery at threshold
  assertEquals(action.testAreThresholdsExceeded(100, 30), false); // Battery above
});

Deno.test('Action.areThresholdsExceeded: returns true when runtime below threshold', () => {
  const action = new TestAction({
    type: 'shutdown',
    thresholds: { battery: 60, runtime: 20 },
  });

  assertEquals(action.testAreThresholdsExceeded(100, 19), true); // Runtime below
  assertEquals(action.testAreThresholdsExceeded(100, 20), false); // Runtime at threshold
  assertEquals(action.testAreThresholdsExceeded(100, 60), false); // Runtime above
});

Deno.test('Action.shouldExecute: onlyPowerChanges mode', () => {
  const action = new TestAction({
    type: 'shutdown',
    triggerMode: 'onlyPowerChanges',
  });

  assertEquals(
    action.testShouldExecute(createMockContext({ triggerReason: 'powerStatusChange' })),
    true,
  );
  assertEquals(
    action.testShouldExecute(createMockContext({ triggerReason: 'thresholdViolation' })),
    false,
  );
});

Deno.test('Action.shouldExecute: onlyThresholds mode', () => {
  const action = new TestAction({
    type: 'shutdown',
    triggerMode: 'onlyThresholds',
    thresholds: { battery: 60, runtime: 20 },
  });

  // Below thresholds - should execute
  assertEquals(
    action.testShouldExecute(createMockContext({ batteryCapacity: 50, batteryRuntime: 10 })),
    true,
  );

  // Above thresholds - should not execute
  assertEquals(
    action.testShouldExecute(createMockContext({ batteryCapacity: 100, batteryRuntime: 60 })),
    false,
  );
});

Deno.test('Action.shouldExecute: onlyThresholds mode without thresholds returns false', () => {
  const action = new TestAction({
    type: 'shutdown',
    triggerMode: 'onlyThresholds',
    // No thresholds configured
  });

  assertEquals(action.testShouldExecute(createMockContext()), false);
});

Deno.test('Action.shouldExecute: powerChangesAndThresholds mode (default)', () => {
  const action = new TestAction({
    type: 'shutdown',
    thresholds: { battery: 60, runtime: 20 },
    // No triggerMode = defaults to powerChangesAndThresholds
  });

  // Power change - should execute
  assertEquals(
    action.testShouldExecute(createMockContext({ triggerReason: 'powerStatusChange' })),
    true,
  );

  // Threshold violation - should execute
  assertEquals(
    action.testShouldExecute(createMockContext({
      triggerReason: 'thresholdViolation',
      batteryCapacity: 50,
    })),
    true,
  );

  // No power change and above thresholds - should not execute
  assertEquals(
    action.testShouldExecute(createMockContext({
      triggerReason: 'thresholdViolation',
      batteryCapacity: 100,
      batteryRuntime: 60,
    })),
    false,
  );
});

Deno.test('Action.shouldExecute: anyChange mode always returns true', () => {
  const action = new TestAction({
    type: 'shutdown',
    triggerMode: 'anyChange',
  });

  assertEquals(
    action.testShouldExecute(createMockContext({ triggerReason: 'powerStatusChange' })),
    true,
  );
  assertEquals(
    action.testShouldExecute(createMockContext({ triggerReason: 'thresholdViolation' })),
    true,
  );
});

// -----------------------------------------------------------------------------
// NupstSnmp Class Tests (Unit tests - no real UPS needed)
// -----------------------------------------------------------------------------

Deno.test('NupstSnmp: can be instantiated', () => {
  const snmp = new NupstSnmp(false);
  assertExists(snmp);
});

Deno.test('NupstSnmp: debug mode can be enabled', () => {
  const snmpDebug = new NupstSnmp(true);
  const snmpNormal = new NupstSnmp(false);

  assertExists(snmpDebug);
  assertExists(snmpNormal);
});

// =============================================================================
// INTEGRATION TESTS - Require real UPS (loaded from .nogit/env.json)
// =============================================================================

// Helper function to run UPS test with config
async function testUpsConnection(
  snmp: NupstSnmp,
  config: Record<string, unknown>,
  description: string,
): Promise<void> {
  console.log(`Testing ${description}...`);

  const snmpConfig = config.snmp as ISnmpConfig;
  console.log('SNMP Config:');
  console.log(`  Host: ${snmpConfig.host}:${snmpConfig.port}`);
  console.log(`  Version: SNMPv${snmpConfig.version}`);
  console.log(`  UPS Model: ${snmpConfig.upsModel}`);

  // Use a reasonable timeout for testing
  const testSnmpConfig = {
    ...snmpConfig,
    timeout: Math.min(snmpConfig.timeout, SNMP.MAX_TEST_TIMEOUT_MS),
  };

  const status = await snmp.getUpsStatus(testSnmpConfig);

  console.log('UPS Status:');
  console.log(`  Power Status: ${status.powerStatus}`);
  console.log(`  Battery Capacity: ${status.batteryCapacity}%`);
  console.log(`  Runtime Remaining: ${status.batteryRuntime} minutes`);

  // Validate response structure
  assertExists(status, 'Status should exist');
  assert(
    ['online', 'onBattery', 'unknown'].includes(status.powerStatus),
    `Power status should be valid: ${status.powerStatus}`,
  );
  assertEquals(typeof status.batteryCapacity, 'number', 'Battery capacity should be a number');
  assertEquals(typeof status.batteryRuntime, 'number', 'Battery runtime should be a number');

  // Validate ranges
  assert(
    status.batteryCapacity >= 0 && status.batteryCapacity <= 100,
    `Battery capacity should be 0-100: ${status.batteryCapacity}`,
  );
  assert(
    status.batteryRuntime >= 0,
    `Battery runtime should be non-negative: ${status.batteryRuntime}`,
  );
}

// Create SNMP instance for integration tests
const snmp = new NupstSnmp(true);

// Load test configurations
const testConfigV1 = await testQenv.getEnvVarOnDemandAsObject('testConfigV1');
const testConfigV3 = await testQenv.getEnvVarOnDemandAsObject('testConfigV3');

Deno.test('Integration: Real UPS test v1', async () => {
  await testUpsConnection(snmp, testConfigV1, 'SNMPv1 connection');
});

Deno.test('Integration: Real UPS test v3', async () => {
  await testUpsConnection(snmp, testConfigV3, 'SNMPv3 connection');
});