/**
 * M9-5 E2E #2 — Firmware Upgrade Error Recovery
 *
 * 目的：對 Design Spec §7.1 列出的 8 種失敗 reason 注入 progress event、驗 UI
 * 對應 friendly message + 復原行動按鈕。
 *
 * 涵蓋 AC：
 *   - AC-FW-1.4 升級失敗時 modal 顯示明確失敗類型 + 複製錯誤訊息 + 重試指引
 *   - R-FW-7 升級失敗 device 不該卡死
 *   - R-FW-11/12 destructive reason 必須顯示 brick warning + 不可 retry
 *
 * Reason 對應 8 種 friendly message：
 *   1. scan_not_found → settings.firmware.error.message.scanNotFound
 *   2. connect_failed → settings.firmware.error.message.connectFailed
 *   3. loader_write_failed → settings.firmware.error.message.loaderWriteFailed
 *   4. upgrade_mid_failed → settings.firmware.error.message.upgradeMidFailed
 *   5. verify_mismatch → settings.firmware.error.message.verifyMismatch (destructive)
 *   6. verify_not_found → settings.firmware.error.message.verifyNotFound (destructive)
 *   7. timeout → settings.firmware.error.message.timeout
 *   8. disconnect_during_op → settings.firmware.error.message.disconnect (destructive)
 *
 * Owner: Testing Agent (M9-5)
 * Last reviewed: 2026-05-25
 */

import { describe, it, expect, beforeEach, vi } from 'vitest';
import { render, screen, fireEvent, waitFor, act } from '@testing-library/react';
import { FirmwareUpgradeDialog } from '@/components/firmware/firmware-upgrade-dialog';
import { useFirmwareStore } from '@/stores/firmware-store';
import type { Device, FirmwareProgressEvent, FirmwareReason } from '@/types/device';

// ──────────────────────────────────────────────────────────────────────
// Test fixtures
// ──────────────────────────────────────────────────────────────────────

function makeLegacyKL520(overrides: Partial<Device> = {}): Device {
  return {
    id: 'kl520-0',
    name: 'KL520 #1',
    type: 'kneron_kl520',
    port: '/dev/usb0',
    status: 'connected',
    firmwareVersion: 'KDP1',
    firmwareIsLegacy: true,
    firmwareCanUpgrade: true,
    bundledFirmwareVersion: 'v2.2.0',
    ...overrides,
  };
}

class MockWebSocket {
  static instances: MockWebSocket[] = [];
  static OPEN = 1;
  static CLOSED = 3;
  readyState = 0;
  onopen: ((e: Event) => void) | null = null;
  onmessage: ((e: MessageEvent) => void) | null = null;
  onclose: ((e: CloseEvent) => void) | null = null;
  onerror: ((e: Event) => void) | null = null;
  constructor(public url: string) {
    MockWebSocket.instances.push(this);
    queueMicrotask(() => {
      this.readyState = MockWebSocket.OPEN;
      this.onopen?.(new Event('open'));
    });
  }
  send() {}
  close() {
    this.readyState = MockWebSocket.CLOSED;
    this.onclose?.(new CloseEvent('close'));
  }
  pushMessage(payload: unknown) {
    this.onmessage?.({ data: JSON.stringify(payload) } as MessageEvent);
  }
}

function installMockWebSocket() {
  MockWebSocket.instances = [];
  (globalThis as any).WebSocket = MockWebSocket;
}

function installMockFetch() {
  global.fetch = vi.fn().mockResolvedValue({
    ok: true,
    json: async () => ({ success: true, data: { taskId: 'task-001' } }),
  });
}

vi.mock('@/stores/device-store', () => ({
  useDeviceStore: Object.assign(
    (selector: (s: any) => any) => selector({ fetchDevices: vi.fn() }),
    { getState: () => ({ fetchDevices: vi.fn() }) },
  ),
}));

async function setupAtUpgradingPhase(device = makeLegacyKL520()) {
  const onOpenChange = vi.fn();
  render(<FirmwareUpgradeDialog device={device} open={true} onOpenChange={onOpenChange} />);

  const startBtn = screen.getByRole('button', { name: /開始升級|Start upgrade/ });
  await act(async () => {
    fireEvent.click(startBtn);
    await Promise.resolve();
    await Promise.resolve();
  });

  await waitFor(() => {
    expect(useFirmwareStore.getState().phase).toBe('upgrading');
  });

  return {
    ws: MockWebSocket.instances[MockWebSocket.instances.length - 1],
    onOpenChange,
  };
}

// ──────────────────────────────────────────────────────────────────────
// 8 種 reason × UI 驗證
// ──────────────────────────────────────────────────────────────────────

interface ReasonCase {
  reason: FirmwareReason;
  stage: FirmwareProgressEvent['stage'];
  isDestructive: boolean;
  expectedButtonPattern: RegExp;
  description: string;
}

const REASON_CASES: ReasonCase[] = [
  {
    reason: 'scan_not_found',
    stage: 'preparing',
    isDestructive: false,
    expectedButtonPattern: /Unplug and retry|插拔/,
    description: 'scan_not_found → ReplugRetry button',
  },
  {
    reason: 'connect_failed',
    stage: 'preparing',
    isDestructive: false,
    expectedButtonPattern: /Retry|重試/,
    description: 'connect_failed → Retry button',
  },
  {
    reason: 'loader_write_failed',
    stage: 'loading',
    isDestructive: false,
    expectedButtonPattern: /Retry|重試/,
    description: 'loader_write_failed → Retry button',
  },
  {
    reason: 'upgrade_mid_failed',
    stage: 'flashing',
    isDestructive: false,
    expectedButtonPattern: /Retry|重試/,
    description: 'upgrade_mid_failed → Retry button',
  },
  {
    reason: 'timeout',
    stage: 'flashing',
    isDestructive: false,
    expectedButtonPattern: /Unplug and rescan|拔插.*掃描/,
    description: 'timeout → Rescan button',
  },
  {
    reason: 'disconnect_during_op',
    stage: 'flashing',
    isDestructive: true,
    expectedButtonPattern: /Contact|Support|聯絡|技術支援/,
    description: 'disconnect_during_op → Contact Support（destructive）',
  },
  {
    reason: 'verify_mismatch',
    stage: 'verifying',
    isDestructive: true,
    expectedButtonPattern: /Contact|Support|聯絡|技術支援/,
    description: 'verify_mismatch → Contact Support（destructive）',
  },
  {
    reason: 'verify_not_found',
    stage: 'verifying',
    isDestructive: true,
    expectedButtonPattern: /Contact|Support|聯絡|技術支援/,
    description: 'verify_not_found → Contact Support（destructive）',
  },
];

describe('M9-5 E2E #2: 8 種失敗 reason 對應 friendly message + 復原 UI', () => {
  beforeEach(() => {
    installMockWebSocket();
    installMockFetch();
    useFirmwareStore.setState({ phase: 'idle', progress: null, activeDeviceId: null });
    vi.spyOn(window, 'open').mockImplementation(() => null);
  });

  it.each(REASON_CASES)(
    '$description',
    async ({ reason, stage, isDestructive, expectedButtonPattern }) => {
      const { ws } = await setupAtUpgradingPhase();

      // 推 error event
      act(() => {
        ws.pushMessage({
          type: 'firmware_progress',
          deviceId: 'kl520-0',
          stage: 'error',
          percent: -1,
          elapsedMs: 5000,
          reason,
          error: `simulated ${reason} failure`,
          rawError: `bridge.py raised ${reason}`,
          errorCode: `FW_${reason.toUpperCase()}_E001`,
        });
      });

      await waitFor(() => {
        expect(useFirmwareStore.getState().phase).toBe('error');
      });

      // 1. error modal 開啟
      expect(screen.getByRole('alertdialog')).toBeTruthy();

      // 2. errorCode 顯示
      const errorCode = `FW_${reason.toUpperCase()}_E001`;
      expect(screen.getAllByText(new RegExp(errorCode)).length).toBeGreaterThanOrEqual(1);

      // 3. destructive vs recoverable
      if (isDestructive) {
        // brick warning role=note 存在
        expect(screen.getByRole('note')).toBeTruthy();
        // 沒有 retry 按鈕
        const buttons = screen.getAllByRole('button');
        const hasRetry = buttons.some((b) => /Retry|重試/.test(b.textContent || ''));
        expect(hasRetry).toBe(false);
      } else {
        // 沒有 brick warning
        expect(screen.queryByRole('note')).toBeNull();
      }

      // 4. 主要按鈕對應 pattern
      const primaryBtn = screen
        .getAllByRole('button')
        .find((b) => expectedButtonPattern.test(b.textContent || ''));
      expect(primaryBtn).toBeTruthy();
    },
  );

  it('Contact Support 按鈕點擊開 mailto: 並帶上技術資訊', async () => {
    const { ws } = await setupAtUpgradingPhase();

    act(() => {
      ws.pushMessage({
        type: 'firmware_progress',
        deviceId: 'kl520-0',
        stage: 'error',
        percent: -1,
        elapsedMs: 8000,
        reason: 'verify_mismatch',
        rawError: 'kp_update_kdp_firmware: version mismatch',
        errorCode: 'FW_VERIFY_MISMATCH_E201',
      });
    });

    await waitFor(() => {
      expect(useFirmwareStore.getState().phase).toBe('error');
    });

    const contactBtn = screen
      .getAllByRole('button')
      .find((b) => /Contact|Support|聯絡|技術支援/.test(b.textContent || ''));
    expect(contactBtn).toBeTruthy();

    fireEvent.click(contactBtn!);
    expect(window.open).toHaveBeenCalled();
    const [href] = (window.open as ReturnType<typeof vi.fn>).mock.calls[0];
    expect(href).toMatch(/^mailto:/);
    // 應帶 errorCode 與 reason
    const decoded = decodeURIComponent(href);
    expect(decoded).toContain('FW_VERIFY_MISMATCH_E201');
    expect(decoded).toContain('reason: verify_mismatch');
  });

  it('Retry 按鈕點擊後 store 回 confirming phase（準備重新升級）', async () => {
    const { ws } = await setupAtUpgradingPhase();

    act(() => {
      ws.pushMessage({
        type: 'firmware_progress',
        deviceId: 'kl520-0',
        stage: 'error',
        percent: -1,
        elapsedMs: 3000,
        reason: 'connect_failed',
        error: 'cannot connect to device',
      });
    });

    await waitFor(() => {
      expect(useFirmwareStore.getState().phase).toBe('error');
    });

    const retryBtn = screen
      .getAllByRole('button')
      .find((b) => /Retry|重試/.test(b.textContent || ''));
    expect(retryBtn).toBeTruthy();

    // 點 retry → dialog handleRetry → setState confirming → handleStart 重連 WS
    await act(async () => {
      fireEvent.click(retryBtn!);
      await Promise.resolve();
      await Promise.resolve();
    });

    // 走 handleStart 後 phase 又回 upgrading
    // （retry 成功 → store 進 upgrading；失敗 → 進 error）
    const phaseAfterRetry = useFirmwareStore.getState().phase;
    expect(['confirming', 'upgrading']).toContain(phaseAfterRetry);
  });

  it('複製錯誤訊息按鈕 → navigator.clipboard.writeText 被叫', async () => {
    // jsdom 預設沒 clipboard、注入 mock
    const writeTextMock = vi.fn().mockResolvedValue(undefined);
    Object.defineProperty(navigator, 'clipboard', {
      configurable: true,
      value: { writeText: writeTextMock },
    });

    const { ws } = await setupAtUpgradingPhase();
    act(() => {
      ws.pushMessage({
        type: 'firmware_progress',
        deviceId: 'kl520-0',
        stage: 'error',
        percent: -1,
        elapsedMs: 5000,
        reason: 'upgrade_mid_failed',
        rawError: 'flash write failed at offset 0x1000',
        errorCode: 'FW_UPGRADE_MID_E102',
      });
    });

    await waitFor(() => {
      expect(useFirmwareStore.getState().phase).toBe('error');
    });

    const copyBtn = screen.getByRole('button', { name: /Copy|複製/ });
    fireEvent.click(copyBtn);

    expect(writeTextMock).toHaveBeenCalled();
    const text = writeTextMock.mock.calls[0][0];
    expect(text).toContain('stage: error');
    expect(text).toContain('reason: upgrade_mid_failed');
    expect(text).toContain('errorCode: FW_UPGRADE_MID_E102');
    expect(text).toContain('rawError: flash write failed at offset 0x1000');
  });
});