// @vitest-environment node
import { describe, expect, it, vi } from 'vitest';

vi.mock('@electron/service/logger', () => {
  const logger = {
    debug: vi.fn(),
    info: vi.fn(),
    warn: vi.fn(),
    error: vi.fn(),
  };

  return {
    default: logger,
    logManager: logger,
  };
});

import {
  classifyGatewayStderrMessage,
  recordGatewayStartupStderrLine,
} from '../electron/gateway/startup-stderr';
import { resolveGatewayLaunchStrategy } from '../electron/gateway/launch-strategy';
import { getGatewayStartupRecoveryAction } from '../electron/gateway/startup-recovery';
import { runGatewayStartupSequence } from '../electron/gateway/startup-orchestrator';
import {
  DEFAULT_RECONNECT_CONFIG,
  getDeferredRestartAction,
  getReconnectScheduleDecision,
  getReconnectSkipReason,
  shouldDeferRestart,
} from '../electron/gateway/process-policy';
import { GatewayLifecycleController, LifecycleSupersededError } from '../electron/gateway/lifecycle-controller';
import { GatewayConnectionMonitor } from '../electron/gateway/connection-monitor';
import { GatewayRestartController } from '../electron/gateway/restart-controller';
import { GatewayRestartGovernor } from '../electron/gateway/restart-governor';
import {
  DEFAULT_GATEWAY_RELOAD_POLICY,
  parseGatewayReloadPolicy,
} from '../electron/gateway/reload-policy';

describe('startup-stderr helpers', () => {
  it('downgrades known config warnings to debug', () => {
    expect(
      classifyGatewayStderrMessage(
        '2026-04-23T09:14:55.599+08:00 Config warnings: stale plugin ignored',
      ),
    ).toEqual({
      level: 'debug',
      normalized: '2026-04-23T09:14:55.599+08:00 Config warnings: stale plugin ignored',
    });
  });

  it('keeps actionable stderr as warn', () => {
    expect(classifyGatewayStderrMessage('fatal: failed to start gateway')).toEqual({
      level: 'warn',
      normalized: 'fatal: failed to start gateway',
    });
  });

  it('caps startup stderr history', () => {
    const lines: string[] = [];
    for (let i = 0; i < 130; i += 1) {
      recordGatewayStartupStderrLine(lines, `line-${i}`);
    }

    expect(lines).toHaveLength(120);
    expect(lines[0]).toBe('line-10');
    expect(lines.at(-1)).toBe('line-129');
  });
});

describe('startup-recovery helpers', () => {
  it('retries transient startup errors before max attempts', () => {
    expect(getGatewayStartupRecoveryAction({
      startupError: new Error('OpenClaw Gateway exited before becoming ready (code=-1)'),
      startupStderrLines: [],
      configRepairAttempted: false,
      attempt: 1,
      maxAttempts: 3,
    })).toBe('retry');
  });

  it('prefers repair for invalid config signals', () => {
    expect(getGatewayStartupRecoveryAction({
      startupError: new Error('startup failed'),
      startupStderrLines: ['invalid config: unrecognized key browser.foo'],
      configRepairAttempted: false,
      attempt: 1,
      maxAttempts: 3,
    })).toBe('repair');
  });

  it('fails once retries are exhausted', () => {
    expect(getGatewayStartupRecoveryAction({
      startupError: new Error('OpenClaw Gateway failed to become ready on port 18789'),
      startupStderrLines: [],
      configRepairAttempted: false,
      attempt: 3,
      maxAttempts: 3,
    })).toBe('fail');
  });
});

describe('launch-strategy helpers', () => {
  it('uses node-runtime on Windows dev by default', () => {
    expect(resolveGatewayLaunchStrategy({
      platform: 'win32',
      mode: 'dev',
    })).toBe('node-runtime');
  });

  it('keeps utility-process for packaged Windows builds', () => {
    expect(resolveGatewayLaunchStrategy({
      platform: 'win32',
      mode: 'packaged',
    })).toBe('utility-process');
  });

  it('honors forced strategy overrides', () => {
    expect(resolveGatewayLaunchStrategy({
      platform: 'darwin',
      mode: 'dev',
      forced: 'utility',
    })).toBe('utility-process');

    expect(resolveGatewayLaunchStrategy({
      platform: 'linux',
      mode: 'packaged',
      forced: 'node',
    })).toBe('node-runtime');
  });
});

describe('runGatewayStartupSequence', () => {
  it('connects to an existing gateway without starting a new process', async () => {
    const connect = vi.fn(async () => {});
    const startProcess = vi.fn(async () => {});
    const onConnectedToExistingGateway = vi.fn();

    await runGatewayStartupSequence({
      port: 18789,
      shouldWaitForPortFree: false,
      resetStartupStderrLines: vi.fn(),
      getStartupStderrLines: () => [],
      findExistingGateway: async () => ({ port: 18789 }),
      connect,
      onConnectedToExistingGateway,
      waitForPortFree: vi.fn(async () => {}),
      startProcess,
      waitForReady: vi.fn(async () => {}),
      onConnectedToManagedGateway: vi.fn(),
      delay: vi.fn(async () => {}),
    });

    expect(connect).toHaveBeenCalledWith(18789, undefined);
    expect(onConnectedToExistingGateway).toHaveBeenCalledTimes(1);
    expect(startProcess).not.toHaveBeenCalled();
  });

  it('starts and connects a managed gateway when none exists', async () => {
    const events: string[] = [];

    await runGatewayStartupSequence({
      port: 19001,
      shouldWaitForPortFree: true,
      resetStartupStderrLines: vi.fn(() => {
        events.push('reset');
      }),
      getStartupStderrLines: () => [],
      findExistingGateway: async () => null,
      connect: async () => {
        events.push('connect');
      },
      onConnectedToExistingGateway: vi.fn(),
      waitForPortFree: async () => {
        events.push('wait-port');
      },
      startProcess: async () => {
        events.push('start');
      },
      waitForReady: async () => {
        events.push('ready');
      },
      onConnectedToManagedGateway: () => {
        events.push('managed-connected');
      },
      delay: vi.fn(async () => {}),
    });

    expect(events).toEqual(['reset', 'wait-port', 'start', 'ready', 'connect', 'managed-connected']);
  });

  it('retries once after a transient startup error', async () => {
    let attempts = 0;
    const delay = vi.fn(async () => {});
    const startProcess = vi.fn(async () => {
      attempts += 1;
      if (attempts === 1) {
        throw new Error('OpenClaw Gateway exited before becoming ready (code=-1)');
      }
    });
    const connect = vi.fn(async () => {});

    await runGatewayStartupSequence({
      port: 19001,
      shouldWaitForPortFree: false,
      maxStartAttempts: 3,
      resetStartupStderrLines: vi.fn(),
      getStartupStderrLines: () => [],
      findExistingGateway: async () => null,
      connect,
      onConnectedToExistingGateway: vi.fn(),
      waitForPortFree: vi.fn(async () => {}),
      startProcess,
      waitForReady: vi.fn(async () => {}),
      onConnectedToManagedGateway: vi.fn(),
      delay,
    });

    expect(startProcess).toHaveBeenCalledTimes(2);
    expect(delay).toHaveBeenCalledTimes(1);
    expect(connect).toHaveBeenCalledTimes(1);
  });

  it('runs doctor repair once for invalid config signals before retrying startup', async () => {
    let attempts = 0;
    const events: string[] = [];
    const runDoctorRepair = vi.fn(async () => true);

    await runGatewayStartupSequence({
      port: 19002,
      shouldWaitForPortFree: false,
      maxStartAttempts: 3,
      resetStartupStderrLines: vi.fn(() => {
        events.push('reset');
      }),
      getStartupStderrLines: () => attempts === 1 ? ['invalid config: unrecognized key browser.foo'] : [],
      findExistingGateway: async () => null,
      connect: async () => {
        events.push('connect');
      },
      onConnectedToExistingGateway: vi.fn(),
      waitForPortFree: vi.fn(async () => {}),
      startProcess: async () => {
        attempts += 1;
        events.push(`start-${attempts}`);
        if (attempts === 1) {
          throw new Error('startup failed');
        }
      },
      waitForReady: async () => {
        events.push('ready');
      },
      onConnectedToManagedGateway: () => {
        events.push('managed-connected');
      },
      runDoctorRepair,
      onDoctorRepairSuccess: () => {
        events.push('repair-success');
      },
      delay: vi.fn(async () => {}),
    });

    expect(runDoctorRepair).toHaveBeenCalledTimes(1);
    expect(events).toEqual([
      'reset',
      'start-1',
      'repair-success',
      'reset',
      'start-2',
      'ready',
      'connect',
      'managed-connected',
    ]);
  });

  it('bubbles lifecycle superseded errors without retrying', async () => {
    await expect(runGatewayStartupSequence({
      port: 19003,
      shouldWaitForPortFree: false,
      resetStartupStderrLines: vi.fn(),
      getStartupStderrLines: () => [],
      findExistingGateway: async () => {
        throw new LifecycleSupersededError('stale start');
      },
      connect: vi.fn(async () => {}),
      onConnectedToExistingGateway: vi.fn(),
      waitForPortFree: vi.fn(async () => {}),
      startProcess: vi.fn(async () => {}),
      waitForReady: vi.fn(async () => {}),
      onConnectedToManagedGateway: vi.fn(),
      delay: vi.fn(async () => {}),
    })).rejects.toThrow('stale start');
  });
});

describe('process-policy helpers', () => {
  it('schedules reconnect attempts with exponential backoff', () => {
    expect(getReconnectScheduleDecision({
      shouldReconnect: true,
      hasReconnectTimer: false,
      reconnectAttempts: 2,
      maxAttempts: DEFAULT_RECONNECT_CONFIG.maxAttempts,
      baseDelay: DEFAULT_RECONNECT_CONFIG.baseDelay,
      maxDelay: DEFAULT_RECONNECT_CONFIG.maxDelay,
    })).toEqual({
      action: 'schedule',
      nextAttempt: 3,
      maxAttempts: 10,
      delay: 4000,
    });
  });

  it('returns skip reasons for reconnect callbacks', () => {
    expect(getReconnectSkipReason({
      scheduledEpoch: 1,
      currentEpoch: 1,
      shouldReconnect: false,
    })).toBe('auto-reconnect disabled');

    expect(getReconnectSkipReason({
      scheduledEpoch: 1,
      currentEpoch: 2,
      shouldReconnect: true,
    })).toContain('stale reconnect callback');
  });

  it('classifies deferred restart actions', () => {
    expect(shouldDeferRestart({ state: 'starting', startLock: false })).toBe(true);
    expect(getDeferredRestartAction({
      hasPendingRestart: true,
      state: 'running',
      startLock: false,
      shouldReconnect: true,
    })).toBe('execute');
    expect(getDeferredRestartAction({
      hasPendingRestart: true,
      state: 'running',
      startLock: false,
      shouldReconnect: false,
    })).toBe('drop');
  });
});

describe('lifecycle-controller helpers', () => {
  it('tracks lifecycle epochs and rejects stale phases', () => {
    const lifecycle = new GatewayLifecycleController();
    const firstEpoch = lifecycle.bump('start');
    expect(firstEpoch).toBe(1);

    lifecycle.bump('restart');
    expect(() => lifecycle.assert(firstEpoch, 'connect')).toThrow(LifecycleSupersededError);
  });
});

describe('connection-monitor helpers', () => {
  it('triggers heartbeat timeout after consecutive misses', () => {
    vi.useFakeTimers();
    try {
      const sendPing = vi.fn();
      const onHeartbeatTimeout = vi.fn();
      const monitor = new GatewayConnectionMonitor();

      monitor.startPing({
        sendPing,
        onHeartbeatTimeout,
        intervalMs: 1000,
        timeoutMs: 500,
        maxConsecutiveMisses: 2,
      });

      vi.advanceTimersByTime(1000);
      vi.advanceTimersByTime(1000);
      vi.advanceTimersByTime(1000);

      expect(sendPing).toHaveBeenCalledTimes(2);
      expect(onHeartbeatTimeout).toHaveBeenCalledWith({
        consecutiveMisses: 2,
        timeoutMs: 500,
      });
    } finally {
      vi.useRealTimers();
    }
  });

  it('resets heartbeat misses when alive messages arrive', () => {
    vi.useFakeTimers();
    try {
      const monitor = new GatewayConnectionMonitor();
      monitor.startPing({
        sendPing: vi.fn(),
        onHeartbeatTimeout: vi.fn(),
        intervalMs: 1000,
        timeoutMs: 500,
        maxConsecutiveMisses: 3,
      });

      vi.advanceTimersByTime(1000);
      vi.advanceTimersByTime(1000);
      expect(monitor.getConsecutiveMisses()).toBe(1);

      monitor.markAlive('message');
      expect(monitor.getConsecutiveMisses()).toBe(0);
    } finally {
      vi.useRealTimers();
    }
  });
});

describe('restart-controller helpers', () => {
  it('flushes deferred restarts once lifecycle settles', () => {
    const controller = new GatewayRestartController();
    const executeRestart = vi.fn();

    controller.markDeferredRestart('restart', {
      state: 'starting',
      startLock: true,
    });

    controller.flushDeferredRestart('status:starting->running', {
      state: 'running',
      startLock: false,
      shouldReconnect: true,
    }, executeRestart);

    expect(executeRestart).toHaveBeenCalledTimes(1);
  });

  it('drops deferred restarts if another restart already completed later', () => {
    vi.useFakeTimers();
    try {
      vi.setSystemTime(new Date('2026-04-23T12:00:00Z'));
      const controller = new GatewayRestartController();
      const executeRestart = vi.fn();

      controller.markDeferredRestart('restart', {
        state: 'starting',
        startLock: true,
      });

      vi.setSystemTime(new Date('2026-04-23T12:00:01Z'));
      controller.recordRestartCompleted();
      controller.flushDeferredRestart('start:finally', {
        state: 'running',
        startLock: false,
        shouldReconnect: true,
      }, executeRestart);

      expect(executeRestart).not.toHaveBeenCalled();
    } finally {
      vi.useRealTimers();
    }
  });

  it('debounces repeated restart requests', () => {
    vi.useFakeTimers();
    try {
      const controller = new GatewayRestartController();
      const executeRestart = vi.fn();

      controller.debouncedRestart(1000, executeRestart);
      controller.debouncedRestart(1000, executeRestart);
      vi.advanceTimersByTime(999);
      expect(executeRestart).not.toHaveBeenCalled();

      vi.advanceTimersByTime(1);
      expect(executeRestart).toHaveBeenCalledTimes(1);
    } finally {
      vi.useRealTimers();
    }
  });
});

describe('restart-governor helpers', () => {
  it('suppresses restart attempts during cooldown', () => {
    const governor = new GatewayRestartGovernor({ cooldownMs: 5000 });

    expect(governor.decide(1000)).toEqual({ allow: true });
    governor.recordExecuted(1000);
    expect(governor.decide(3000)).toEqual({
      allow: false,
      reason: 'cooldown_active',
      retryAfterMs: 3000,
    });
    expect(governor.getCounters()).toEqual({
      executedTotal: 1,
      suppressedTotal: 1,
    });
  });
});

describe('reload-policy helpers', () => {
  it('parses valid gateway reload config and clamps debounce', () => {
    expect(parseGatewayReloadPolicy({
      gateway: {
        reload: {
          mode: 'restart',
          debounceMs: 120000,
        },
      },
    })).toEqual({
      mode: 'restart',
      debounceMs: 60000,
    });
  });

  it('falls back to defaults for invalid values', () => {
    expect(parseGatewayReloadPolicy({
      gateway: {
        reload: {
          mode: 'invalid',
          debounceMs: 'oops',
        },
      },
    })).toEqual(DEFAULT_GATEWAY_RELOAD_POLICY);
  });
});