import { Then, When } from '@cucumber/cucumber';
import { backOff } from 'exponential-backoff';
import fs from 'fs-extra';
import path from 'path';
import type { IWorkspace } from '../../src/services/workspaces/interface';
import { settingsPath, wikiTestRootPath, wikiTestWikiPath } from '../supports/paths';
import type { ApplicationWorld } from './application';

// Backoff configuration for retries
const BACKOFF_OPTIONS = {
  numOfAttempts: 10,
  startingDelay: 200,
  timeMultiple: 1.5,
};

/**
 * Generic function to wait for a log marker to appear in wiki log files.
 */
export async function waitForLogMarker(searchString: string, errorMessage: string, maxWaitMs = 10000, logFilePattern = 'wiki-'): Promise<void> {
  const logPath = path.join(process.cwd(), 'userData-test', 'logs');

  try {
    await backOff(
      async () => {
        try {
          const files = await fs.readdir(logPath);
          const logFiles = files.filter(f => f.startsWith(logFilePattern) && f.endsWith('.log'));

          for (const file of logFiles) {
            const content = await fs.readFile(path.join(logPath, file), 'utf-8');
            if (content.includes(searchString)) {
              return;
            }
          }
        } catch {
          // Log directory might not exist yet, continue retrying
        }

        throw new Error('Log marker not found yet');
      },
      {
        numOfAttempts: Math.ceil(maxWaitMs / 100),
        startingDelay: 100,
        timeMultiple: 1,
        maxDelay: 100,
        delayFirstAttempt: false,
      },
    );
  } catch {
    // If backOff fails, throw the user-friendly error message
    throw new Error(errorMessage);
  }
}

When('I cleanup test wiki so it could create a new one on start', async function() {
  if (fs.existsSync(wikiTestWikiPath)) fs.removeSync(wikiTestWikiPath);

  /**
   * Clean up log files to prevent reading stale logs from previous scenarios.
   * This is critical for tests that wait for log markers like [test-id-WATCH_FS_STABILIZED] or [test-id-git-commit-complete],
   * as Node.js file system caching can cause tests to read old log content.
   * Must clean both wiki- and TidGi- log files for git-related tests.
   */
  const logDirectory = path.join(process.cwd(), 'userData-test', 'logs');
  if (fs.existsSync(logDirectory)) {
    const logFiles = fs.readdirSync(logDirectory).filter(f => (f.startsWith('wiki-') || f.startsWith('TidGi-')) && f.endsWith('.log'));
    for (const logFile of logFiles) {
      fs.removeSync(path.join(logDirectory, logFile));
    }
  }

  type SettingsFile = { workspaces?: Record<string, IWorkspace> } & Record<string, unknown>;
  if (!fs.existsSync(settingsPath)) return;

  // Retry logic with exponential backoff for reading settings.json - it might be temporarily locked or corrupted
  let settings: SettingsFile;

  try {
    settings = await backOff(
      async () => {
        return fs.readJsonSync(settingsPath) as SettingsFile;
      },
      {
        numOfAttempts: 3,
        startingDelay: 100,
        timeMultiple: 2,
        maxDelay: 500,
        retry: (error: Error, attemptNumber: number) => {
          console.warn(`Attempt ${attemptNumber}/3 failed to read settings.json:`, error);

          // If file is corrupted, don't retry - handle it in catch block
          if (error instanceof SyntaxError || error.message.includes('Unexpected end of JSON input')) {
            return false;
          }

          return true;
        },
      },
    );
  } catch (error) {
    // If file is corrupted or all retries failed, create empty settings
    console.warn('Settings file is corrupted or failed to read after retries, recreating with empty workspaces', error);
    settings = { workspaces: {} };
  }

  const workspaces: Record<string, IWorkspace> = settings.workspaces ?? {};
  const filtered: Record<string, IWorkspace> = {};
  for (const id of Object.keys(workspaces)) {
    const ws = workspaces[id];
    const name = ws.name;
    if (name === 'wiki' || id === 'wiki') continue;
    filtered[id] = ws;
  }

  // Write with exponential backoff retry logic to handle file locks
  try {
    await backOff(
      async () => {
        fs.writeJsonSync(settingsPath, { ...settings, workspaces: filtered }, { spaces: 2 });
      },
      {
        numOfAttempts: 3,
        startingDelay: 100,
        timeMultiple: 2,
        maxDelay: 500,
        retry: (_error: Error, attemptNumber: number) => {
          console.warn(`Attempt ${attemptNumber}/3 failed to write settings.json:`, _error);
          return true;
        },
      },
    );
  } catch (error) {
    console.error('Failed to write settings.json after 3 attempts, continuing anyway', error);
  }
});

/**
 * Helper function to get directory tree structure
 */
async function getDirectoryTree(directory: string, prefix = '', maxDepth = 3, currentDepth = 0): Promise<string> {
  if (currentDepth >= maxDepth || !(await fs.pathExists(directory))) {
    return '';
  }

  let tree = '';
  try {
    const items = await fs.readdir(directory);
    for (let index = 0; index < items.length; index++) {
      const item = items[index];
      const isLast = index === items.length - 1;
      const itemPath = path.join(directory, item);
      const connector = isLast ? '└── ' : '├── ';

      try {
        const stat = await fs.stat(itemPath);
        tree += `${prefix}${connector}${item}${stat.isDirectory() ? '/' : ''}\n`;

        if (stat.isDirectory()) {
          const newPrefix = prefix + (isLast ? '    ' : '│   ');
          tree += await getDirectoryTree(itemPath, newPrefix, maxDepth, currentDepth + 1);
        }
      } catch {
        tree += `${prefix}${connector}${item} [error reading]\n`;
      }
    }
  } catch {
    // Directory not readable
  }

  return tree;
}

/**
 * Verify file exists in directory
 */
Then('file {string} should exist in {string}', async function(this: ApplicationWorld, fileName: string, simpleDirectoryPath: string) {
  // Replace {tmpDir} with wiki test root (not wiki subfolder)
  let directoryPath = simpleDirectoryPath.replace('{tmpDir}', wikiTestRootPath);

  // Resolve symlinks on all platforms to handle sub-wikis correctly
  // On Linux, symlinks might point to the real path, so we need to follow them
  if (await fs.pathExists(directoryPath)) {
    try {
      directoryPath = fs.realpathSync(directoryPath);
    } catch {
      // If realpathSync fails, continue with the original path
    }
  }

  const filePath = path.join(directoryPath, fileName);

  try {
    await backOff(
      async () => {
        if (await fs.pathExists(filePath)) {
          return;
        }
        throw new Error('File not found yet');
      },
      BACKOFF_OPTIONS,
    );
  } catch {
    // Get 1 level up from actualPath
    const oneLevelsUp = path.resolve(directoryPath, '..');
    const tree = await getDirectoryTree(oneLevelsUp);

    // Also read all .tid files in the actualPath directory
    let tidFilesContent = '';
    try {
      if (await fs.pathExists(directoryPath)) {
        const files = await fs.readdir(directoryPath);
        const tidFiles = files.filter(f => f.endsWith('.tid'));

        if (tidFiles.length > 0) {
          tidFilesContent = '\n\n.tid files in directory:\n';
          for (const tidFile of tidFiles) {
            const tidPath = path.join(directoryPath, tidFile);
            const content = await fs.readFile(tidPath, 'utf-8');
            tidFilesContent += `\n=== ${tidFile} ===\n${content}\n`;
          }
        }
      }
    } catch (readError) {
      tidFilesContent = `\n\nError reading .tid files: ${String(readError)}`;
    }

    throw new Error(
      `File "${fileName}" not found in directory: ${directoryPath}\n\n` +
        `Directory tree (1 level up from ${oneLevelsUp}):\n${tree}${tidFilesContent}`,
    );
  }
});

Then('file {string} should not exist in {string}', { timeout: 15000 }, async function(this: ApplicationWorld, fileName: string, simpleDirectoryPath: string) {
  // Replace {tmpDir} with wiki test root (not wiki subfolder)
  let directoryPath = simpleDirectoryPath.replace('{tmpDir}', wikiTestRootPath);

  // Resolve symlinks on all platforms to handle sub-wikis correctly
  if (await fs.pathExists(directoryPath)) {
    try {
      directoryPath = fs.realpathSync(directoryPath);
    } catch {
      // If realpathSync fails, continue with the original path
    }
  }

  const filePath = path.join(directoryPath, fileName);

  try {
    await backOff(
      async () => {
        if (!(await fs.pathExists(filePath))) {
          return;
        }
        throw new Error('File still exists');
      },
      BACKOFF_OPTIONS,
    );
  } catch {
    throw new Error(
      `File "${fileName}" should not exist but was found in directory: ${directoryPath}`,
    );
  }
});

/**
 * Cleanup function for sub-wiki routing test
 * Removes test workspaces created during the test
 */
async function clearSubWikiRoutingTestData() {
  if (!(await fs.pathExists(settingsPath))) return;

  type SettingsFile = { workspaces?: Record<string, IWorkspace> } & Record<string, unknown>;
  const settings = await fs.readJson(settingsPath) as SettingsFile;
  const workspaces: Record<string, IWorkspace> = settings.workspaces ?? {};
  const filtered: Record<string, IWorkspace> = {};

  // Remove test workspaces (SubWiki, etc from sub-wiki routing tests)
  for (const id of Object.keys(workspaces)) {
    const ws = workspaces[id];
    const name = ws.name;
    // Keep workspaces that don't match test patterns
    if (name !== 'SubWiki') {
      filtered[id] = ws;
    }
  }

  await fs.writeJson(settingsPath, { ...settings, workspaces: filtered }, { spaces: 2 });

  // Remove test wiki folders from filesystem
  const testFolders = ['SubWiki'];
  for (const folder of testFolders) {
    const wikiPath = path.join(wikiTestWikiPath, folder);
    if (await fs.pathExists(wikiPath)) {
      await fs.remove(wikiPath);
    }
  }
}

/**
 * Clear git test data to prevent state pollution between git tests
 * Removes the entire wiki folder - it will be recreated on next test start
 */
async function clearGitTestData() {
  const wikiPath = path.join(wikiTestWikiPath, 'wiki');
  if (!(await fs.pathExists(wikiPath))) return;

  try {
    await fs.remove(wikiPath);
  } catch (error) {
    console.warn('Failed to remove wiki folder in git cleanup:', error);
  }
}

/**
 * Generic step to wait for any log marker
 * @param description - Human-readable description of what we're waiting for (comes first for readability)
 * @param marker - The test-id marker to look for in logs
 *
 * This searches in both TidGi- and wiki- log files with appropriate timeouts
 */
Then('I wait for {string} log marker {string}', async function(this: ApplicationWorld, description: string, marker: string) {
  // Determine timeout and log prefix based on operation type
  const isGitOperation = marker.includes('git-') || marker.includes('revert');
  const isWikiRestart = marker.includes('MAIN_WIKI_RESTARTED');
  const isWorkspaceOperation = marker.includes('WORKSPACE_');
  const isRevert = marker.includes('revert');
  const timeout = isRevert ? 30000 : (isWikiRestart ? 25000 : (isGitOperation ? 25000 : 15000));
  const logPrefix = (isGitOperation || isWikiRestart || isWorkspaceOperation) ? 'TidGi-' : undefined;
  await waitForLogMarker(marker, `Log marker "${marker}" not found. Expected: ${description}`, timeout, logPrefix);
});

/**
 * Convenience step for waiting for SSE and watch-fs to be ready
 * This is commonly used in Background sections
 */
Then('I wait for SSE and watch-fs to be ready', async function(this: ApplicationWorld) {
  await waitForLogMarker('[test-id-WATCH_FS_STABILIZED]', 'watch-fs did not become ready within timeout', 20000);
  await waitForLogMarker('[test-id-SSE_READY]', 'SSE backend did not become ready within timeout', 20000);
});

/**
 * Convenience steps for waiting for tiddler operations detected by watch-fs
 * These use dynamic markers that include the tiddler name
 */
Then('I wait for tiddler {string} to be added by watch-fs', async function(this: ApplicationWorld, tiddlerTitle: string) {
  await waitForLogMarker(
    `[test-id-WATCH_FS_TIDDLER_ADDED] ${tiddlerTitle}`,
    `Tiddler "${tiddlerTitle}" was not added within timeout`,
  );
});

Then('I wait for tiddler {string} to be updated by watch-fs', async function(this: ApplicationWorld, tiddlerTitle: string) {
  await waitForLogMarker(
    `[test-id-WATCH_FS_TIDDLER_UPDATED] ${tiddlerTitle}`,
    `Tiddler "${tiddlerTitle}" was not updated within timeout`,
  );
});

Then('I wait for tiddler {string} to be deleted by watch-fs', async function(this: ApplicationWorld, tiddlerTitle: string) {
  await waitForLogMarker(
    `[test-id-WATCH_FS_TIDDLER_DELETED] ${tiddlerTitle}`,
    `Tiddler "${tiddlerTitle}" was not deleted within timeout`,
  );
});

// File manipulation step definitions

When('I create file {string} with content:', async function(this: ApplicationWorld, filePath: string, content: string) {
  // Replace {tmpDir} placeholder with actual temp directory
  const actualPath = filePath.replace('{tmpDir}', wikiTestRootPath);

  // Ensure directory exists
  await fs.ensureDir(path.dirname(actualPath));

  // Write the file with the provided content
  await fs.writeFile(actualPath, content, 'utf-8');
});

When('I modify file {string} to contain {string}', async function(this: ApplicationWorld, filePath: string, content: string) {
  // Replace {tmpDir} placeholder with actual temp directory
  const actualPath = filePath.replace('{tmpDir}', wikiTestRootPath);

  // Read the existing file
  let fileContent = await fs.readFile(actualPath, 'utf-8');

  // TiddlyWiki .tid files have a format: headers followed by blank line and text
  // We need to preserve headers and only modify the text part
  // Split by both \n and \r\n to handle different line endings
  const lines = fileContent.split(/\r?\n/);

  const blankLineIndex = lines.findIndex(line => line.trim() === '');

  if (blankLineIndex >= 0) {
    // File has headers and content separated by blank line
    // Keep headers, replace text after blank line
    const headers = lines.slice(0, blankLineIndex + 1);

    // Note: We intentionally do NOT update the modified field here
    // This simulates a real user editing the file in an external editor,
    // where the modified field would not be automatically updated
    // The echo prevention mechanism should detect this as a real external change
    // because the content changed but the modified timestamp stayed the same

    fileContent = [...headers, content].join('\n');
  } else {
    // File has only headers, no content yet (no blank line separator)
    // We need to add the blank line separator and the content
    // Again, we don't modify the modified field
    fileContent = [...lines, '', content].join('\n');
  }

  // Write the modified content back
  await fs.writeFile(actualPath, fileContent, 'utf-8');
});

When('I modify file {string} to contain:', async function(this: ApplicationWorld, filePath: string, content: string) {
  // Replace {tmpDir} placeholder with actual temp directory
  const actualPath = filePath.replace('{tmpDir}', wikiTestRootPath);

  // For multi-line content with headers, just write the content directly
  // (assumes the content includes all headers and structure)
  await fs.writeFile(actualPath, content, 'utf-8');
});

When('I delete file {string}', async function(this: ApplicationWorld, filePath: string) {
  // Replace {tmpDir} placeholder with actual temp directory
  const actualPath = filePath.replace('{tmpDir}', wikiTestRootPath);

  // Delete the file
  await fs.remove(actualPath);
});

When('I rename file {string} to {string}', async function(this: ApplicationWorld, oldPath: string, newPath: string) {
  // Replace {tmpDir} placeholder with actual temp directory
  const actualOldPath = oldPath.replace('{tmpDir}', wikiTestRootPath);
  const actualNewPath = newPath.replace('{tmpDir}', wikiTestRootPath);

  // Ensure the target directory exists
  await fs.ensureDir(path.dirname(actualNewPath));

  // Rename/move the file
  await fs.rename(actualOldPath, actualNewPath);
});

When('I modify file {string} to add field {string}', async function(this: ApplicationWorld, filePath: string, fieldLine: string) {
  // Replace {tmpDir} placeholder with actual temp directory
  const actualPath = filePath.replace('{tmpDir}', wikiTestRootPath);

  // Read the existing file
  const fileContent = await fs.readFile(actualPath, 'utf-8');

  // TiddlyWiki .tid files have headers followed by a blank line and text
  // We need to add the field to the headers section
  const lines = fileContent.split('\n');
  const blankLineIndex = lines.findIndex(line => line.trim() === '');

  if (blankLineIndex >= 0) {
    // Insert the new field before the blank line
    lines.splice(blankLineIndex, 0, fieldLine);
  } else {
    // No blank line found, add to the beginning
    lines.unshift(fieldLine);
  }

  // Write the modified content back
  await fs.writeFile(actualPath, lines.join('\n'), 'utf-8');
});

When('I open edit workspace window for workspace with name {string}', async function(this: ApplicationWorld, workspaceName: string) {
  if (!this.app) {
    throw new Error('Application is not available');
  }

  // Read settings file to get workspace info
  const settings = await fs.readJson(settingsPath) as { workspaces?: Record<string, IWorkspace> };
  const workspaces: Record<string, IWorkspace> = settings.workspaces ?? {};

  // Find workspace by name
  let targetWorkspaceId: string | undefined;
  for (const [id, workspace] of Object.entries(workspaces)) {
    if (!workspace.pageType && workspace.name === workspaceName) {
      targetWorkspaceId = id;
      break;
    }
  }

  if (!targetWorkspaceId) {
    throw new Error(`No workspace found with name: ${workspaceName}`);
  }

  // Call window service through main window's webContents to open edit workspace window
  await this.app.evaluate(async ({ BrowserWindow }, workspaceId: string) => {
    const windows = BrowserWindow.getAllWindows();
    const mainWindow = windows.find(win => !win.isDestroyed() && win.webContents && win.webContents.getURL().includes('index.html'));

    if (!mainWindow) {
      throw new Error('Main window not found');
    }

    // Call the window service to open edit workspace window
    // Safely pass workspaceId using JSON serialization to avoid string interpolation vulnerability
    await mainWindow.webContents.executeJavaScript(`
      (async () => {
        await window.service.window.open('editWorkspace', { workspaceID: ${JSON.stringify(workspaceId)} });
      })();
    `);
  }, targetWorkspaceId);

  // Wait for the edit workspace window to appear
  const success = await this.waitForWindowCondition(
    'editWorkspace',
    (window) => window !== undefined && !window.isClosed(),
  );

  if (!success) {
    throw new Error('Edit workspace window did not appear after opening');
  }
});

When('I create a new wiki workspace with name {string}', async function(this: ApplicationWorld, workspaceName: string) {
  if (!this.app) {
    throw new Error('Application is not available');
  }

  // Construct the full wiki path
  const wikiPath = path.join(wikiTestRootPath, workspaceName);

  // Create the wiki folder using the template
  const templatePath = path.join(process.cwd(), 'template', 'wiki');
  await fs.copy(templatePath, wikiPath);

  // Remove the copied .git directory from the template to start fresh
  const gitPath = path.join(wikiPath, '.git');
  await fs.remove(gitPath).catch(() => {
    // Ignore if .git doesn't exist
  });

  // Initialize fresh git repository for the new wiki
  const { execSync } = await import('child_process');
  try {
    execSync('git init', { cwd: wikiPath });
    execSync('git config user.email "test@tidgi.test"', { cwd: wikiPath });
    execSync('git config user.name "TidGi Test"', { cwd: wikiPath });
    execSync('git add .', { cwd: wikiPath });
    execSync('git commit -m "Initial commit"', { cwd: wikiPath });
  } catch (error) {
    // Git initialization is not critical for the test, continue anyway
    console.log('Git initialization skipped:', (error as Error).message);
  }

  // Now create workspace configuration
  await this.app.evaluate(async ({ BrowserWindow }, { wikiName, wikiFullPath }: { wikiName: string; wikiFullPath: string }) => {
    const windows = BrowserWindow.getAllWindows();
    const mainWindow = windows.find(win => !win.isDestroyed() && win.webContents && win.webContents.getURL().includes('index.html'));

    if (!mainWindow) {
      throw new Error('Main window not found');
    }

    // Call workspace service to create new workspace
    // Safely pass parameters using JSON serialization to avoid string interpolation vulnerability
    await mainWindow.webContents.executeJavaScript(`
      (async () => {
        await window.service.workspace.create({
          name: ${JSON.stringify(wikiName)},
          wikiFolderLocation: ${JSON.stringify(wikiFullPath)},
          isSubWiki: false,
          storageService: 'local',
        });
      })();
    `);
  }, { wikiName: workspaceName, wikiFullPath: wikiPath });

  // Wait for workspace to appear in UI
  await this.app.evaluate(async () => {
    await new Promise(resolve => setTimeout(resolve, 1000));
  });
});

/**
 * Clean up hibernation test data - remove wiki2 folder and its workspace config
 */
async function clearHibernationTestData() {
  const wiki2Path = path.join(wikiTestRootPath, 'wiki2');

  // Remove wiki2 folder
  if (await fs.pathExists(wiki2Path)) {
    try {
      await fs.remove(wiki2Path);
    } catch (error) {
      console.warn('Failed to remove wiki2 folder in hibernation cleanup:', error);
    }
  }

  // Remove wiki2 workspace config from settings.json
  const settingsPath = path.join(process.cwd(), 'userData-test', 'settings', 'settings.json');
  if (await fs.pathExists(settingsPath)) {
    try {
      type SettingsFile = { workspaces?: Record<string, IWorkspace> } & Record<string, unknown>;
      const settings = await fs.readJson(settingsPath) as SettingsFile;
      if (settings.workspaces) {
        // Find and remove wiki2 workspace by folder location
        const wiki2WorkspaceId = Object.keys(settings.workspaces).find(id => {
          const workspace = settings.workspaces?.[id];
          return workspace && 'wikiFolderLocation' in workspace && workspace.wikiFolderLocation === wiki2Path;
        });

        if (wiki2WorkspaceId && settings.workspaces) {
          // eslint-disable-next-line @typescript-eslint/no-dynamic-delete
          delete settings.workspaces[wiki2WorkspaceId];
          await fs.writeJson(settingsPath, settings, { spaces: 2 });
        }
      }
    } catch (error) {
      console.warn('Failed to remove wiki2 workspace config in hibernation cleanup:', error);
    }
  }
}

export { clearGitTestData, clearHibernationTestData, clearSubWikiRoutingTestData };