/**
 * Session Logs Bridge - Handles session log export and auto-save operations
 * Provides functionality to export terminal logs to files and manage auto-save settings
 */

const crypto = require("node:crypto");
const fs = require("node:fs");
const path = require("node:path");
const { dialog } = require("electron");
const {
  terminalDataToHtmlContent,
  terminalDataToPlainText,
} = require("./terminalLogSanitizer.cjs");

const FILE_NAME_UNSAFE_CHARS = new Set(["<", ">", ":", "\"", "/", "\\", "|", "?", "*"]);
const WINDOWS_RESERVED_DEVICE_NAME = /^(con|prn|aux|nul|com[1-9¹²³]|lpt[1-9¹²³])(?:\..*)?$/i;
const manualSessionLogTokens = new Map();
/** @type {Map<string, { sessionId: string, filePath: string, format: string, senderId: number | null }>} */
const pendingManualSessionLogChoices = new Map();
const SESSION_LOG_FORMATS = new Set(["txt", "raw", "html"]);

function isControlCharacter(char) {
  const code = char.codePointAt(0);
  return code !== undefined && ((code >= 0 && code <= 0x1f) || (code >= 0x7f && code <= 0x9f));
}

/**
 * Get current Date to a local ISO-like string (YYYY-MM-DDTHH-MM-SS)
 */
function toLocalISOString(date = new Date()) {
  const pad = (n) => String(n).padStart(2, '0');

  const year = date.getFullYear();
  const month = pad(date.getMonth() + 1);
  const day = pad(date.getDate());
  const hours = pad(date.getHours());
  const minutes = pad(date.getMinutes());
  const seconds = pad(date.getSeconds());

  return `${year}-${month}-${day}T${hours}-${minutes}-${seconds}`;
}

function safePathSegment(value, fallback = "unknown") {
  const raw = String(value || "");
  let safe = Array.from(raw, (char) => {
    return FILE_NAME_UNSAFE_CHARS.has(char) || isControlCharacter(char) ? "_" : char;
  }).join("").trim();

  if (!safe || safe === "." || safe === "..") {
    return fallback;
  }

  safe = safe.replace(/\.+$/g, (match) => "_".repeat(match.length));

  if (WINDOWS_RESERVED_DEVICE_NAME.test(safe)) {
    safe = `${safe}_`;
  }

  return safe;
}

/**
 * Escape HTML special characters to prevent XSS
 * Must be applied before converting ANSI codes to HTML spans
 */
function escapeHtml(str) {
  return str
    .replace(/&/g, "&amp;")
    .replace(/</g, "&lt;")
    .replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;")
    .replace(/'/g, "&#039;");
}

function terminalPlainTextToHtml(plainText, hostLabel, timestamp) {
  const htmlContent = escapeHtml(plainText || "");
  return wrapTerminalHtmlContent(htmlContent, hostLabel, timestamp);
}

function buildExtendedForegroundPalette(htmlContent) {
  const colors = new Set(Array.from(
    htmlContent.matchAll(/var\(--term-custom-([a-f0-9]{6}), #[a-f0-9]{6}\)/g),
    (match) => match[1],
  ));
  const light = [];
  const dark = [];
  for (const hex of colors) {
    const channels = hex.match(/../g).map((channel) => parseInt(channel, 16));
    const linearChannels = channels.map((channel) => {
      const value = channel / 255;
      return value <= 0.04045 ? value / 12.92 : ((value + 0.055) / 1.055) ** 2.4;
    });
    const luminance = linearChannels[0] * 0.2126 + linearChannels[1] * 0.7152 + linearChannels[2] * 0.0722;
    const maxLuminance = 1.05 / 4.5 - 0.05;
    let adjusted = channels;
    // A single linear-light scaling reaches the contrast target without an
    // iterative search for every color on each streaming snapshot.
    if (luminance > maxLuminance) {
      const scale = maxLuminance / luminance;
      adjusted = linearChannels.map((channel) => {
        const value = channel * scale;
        const srgb = value <= 0.0031308 ? value * 12.92 : 1.055 * value ** (1 / 2.4) - 0.055;
        return Math.floor(srgb * 255);
      });
    }
    const lightHex = adjusted.map((channel) => channel.toString(16).padStart(2, "0")).join("");
    light.push(`--term-custom-${hex}: #${lightHex};`);
    dark.push(`--term-custom-${hex}: #${hex};`);
  }
  return { light: light.join("\n      "), dark: dark.join("\n        ") };
}

function wrapTerminalHtmlContent(htmlContent, hostLabel, timestamp) {
  const extendedPalette = buildExtendedForegroundPalette(htmlContent);
  const dateStr = new Date(timestamp).toLocaleString();
  const safeHostLabel = escapeHtml(hostLabel || "Unknown");
  const safeDateStr = escapeHtml(dateStr);

  return `<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="color-scheme" content="light dark">
  <title>Session Log - ${safeHostLabel}</title>
  <style>
    :root {
      color-scheme: light dark;
      /* Day palette (default): readable on light browser/OS themes. */
      --term-default-bg: #ffffff;
      --term-default-fg: #24292f;
      --term-header-fg: #6a737d;
      --term-border: #d0d7de;
      /* ANSI palette (basic 0-7, bright 8-15) tuned for the light background. */
      --ansi-0: #000000;
      --ansi-1: #cd3131;
      --ansi-2: #008000;
      --ansi-3: #747700;
      --ansi-4: #0451a5;
      --ansi-5: #bc05bc;
      --ansi-6: #007c9b;
      --ansi-7: #555555;
      --ansi-8: #666666;
      --ansi-9: #cd3131;
      --ansi-10: #008500;
      --ansi-11: #797600;
      --ansi-12: #0451a5;
      --ansi-13: #bc05bc;
      --ansi-14: #007c9b;
      --ansi-15: #767676;
      ${extendedPalette.light}
    }
    @media (prefers-color-scheme: dark) {
      :root {
        --term-default-bg: #1e1e1e;
        --term-default-fg: #d4d4d4;
        --term-header-fg: #888888;
        --term-border: #444444;
        --ansi-0: #000000;
        --ansi-1: #cd3131;
        --ansi-2: #0dbc79;
        --ansi-3: #e5e510;
        --ansi-4: #2472c8;
        --ansi-5: #bc3fbc;
        --ansi-6: #11a8cd;
        --ansi-7: #e5e5e5;
        --ansi-8: #666666;
        --ansi-9: #f14c4c;
        --ansi-10: #23d18b;
        --ansi-11: #f5f543;
        --ansi-12: #3b8eea;
        --ansi-13: #d670d6;
        --ansi-14: #29b8db;
        --ansi-15: #ffffff;
        ${extendedPalette.dark}
      }
    }
    body {
      background: var(--term-default-bg);
      color: var(--term-default-fg);
      font-family: ui-monospace, 'Cascadia Mono', 'JetBrains Mono', 'SF Mono',
        Consolas, Monaco, Menlo, monospace;
      font-size: 13px;
      line-height: 1.5;
      padding: 20px;
      white-space: pre-wrap;
      word-wrap: break-word;
    }
    .header {
      border-bottom: 1px solid var(--term-border);
      padding-bottom: 10px;
      margin-bottom: 20px;
      color: var(--term-header-fg);
    }
  </style>
</head>
<body>
  <div class="header">
    Host: ${safeHostLabel}<br>
    Date: ${safeDateStr}
  </div>
  <div class="content">${htmlContent || ""}</div>
</body>
</html>`;
}

/**
 * Convert terminal data to HTML after applying terminal text controls while
 * preserving SGR styles such as color, bold, italic, and underline.
 */
function terminalDataToHtml(terminalData, hostLabel, timestamp) {
  return wrapTerminalHtmlContent(terminalDataToHtmlContent(terminalData), hostLabel, timestamp);
}

/**
 * Export a session log to a file (manual export via save dialog)
 */
async function exportSessionLog(event, payload) {
  const { terminalData, hostLabel, hostname, startTime, format } = payload;

  if (!terminalData) {
    throw new Error("No terminal data to export");
  }

  // Generate default filename
  const date = new Date(startTime);
  const dateStr = toLocalISOString(date);
  const safeHostLabel = safePathSegment(hostLabel || hostname, "session");
  const ext = format === "html" ? "html" : format === "raw" ? "log" : "txt";
  const defaultPath = `${safeHostLabel}_${dateStr}.${ext}`;

  // Show save dialog
  const result = await dialog.showSaveDialog({
    defaultPath,
    filters: [
      { name: "Text Files", extensions: ["txt"] },
      { name: "Log Files", extensions: ["log"] },
      { name: "HTML Files", extensions: ["html"] },
      { name: "All Files", extensions: ["*"] },
    ],
  });

  if (result.canceled || !result.filePath) {
    return { success: false, canceled: true };
  }

  // Prepare content based on format
  let content;
  const actualFormat = path.extname(result.filePath).slice(1) || format;

  if (actualFormat === "html") {
    content = terminalDataToHtml(terminalData, hostLabel, startTime);
  } else if (actualFormat === "log" || actualFormat === "raw") {
    // Raw format preserves ANSI codes
    content = terminalData;
  } else {
    // Plain text - apply terminal text controls and remove escape sequences
    content = terminalDataToPlainText(terminalData);
  }

  await fs.promises.writeFile(result.filePath, content, "utf8");

  return { success: true, filePath: result.filePath };
}

/**
 * Select a directory for session logs storage
 */
async function selectSessionLogsDir(event) {
  const result = await dialog.showOpenDialog({
    properties: ["openDirectory", "createDirectory"],
    title: "Select Session Logs Directory",
  });

  if (result.canceled || !result.filePaths || result.filePaths.length === 0) {
    return { success: false, canceled: true };
  }

  return { success: true, directory: result.filePaths[0] };
}

/**
 * Auto-save a session log to the configured directory
 * Called when a terminal session ends
 */
async function autoSaveSessionLog(event, payload) {
  const { terminalData, hostLabel, hostname, hostId, startTime, format, directory } = payload;

  if (!terminalData || !directory) {
    return { success: false, error: "Missing terminal data or directory" };
  }

  try {
    // Create host subdirectory
    const safeHostLabel = safePathSegment(hostLabel || hostname || hostId, "unknown");
    const hostDir = path.join(directory, safeHostLabel);

    await fs.promises.mkdir(hostDir, { recursive: true });

    // Generate filename with timestamp
    const date = new Date(startTime);
    const dateStr = toLocalISOString(date);
    const ext = format === "html" ? "html" : format === "raw" ? "log" : "txt";
    const fileName = `${dateStr}.${ext}`;
    const filePath = path.join(hostDir, fileName);

    // Prepare content based on format
    let content;
    if (format === "html") {
      content = terminalDataToHtml(terminalData, hostLabel, startTime);
    } else if (format === "raw") {
      content = terminalData;
    } else {
      content = terminalDataToPlainText(terminalData);
    }

    await fs.promises.writeFile(filePath, content, "utf8");

    return { success: true, filePath };
  } catch (err) {
    console.error("Failed to auto-save session log:", err);
    return { success: false, error: err.message };
  }
}

/**
 * Open the session logs directory in the system file explorer
 */
async function openSessionLogsDir(event, payload) {
  const { shell } = require("electron");
  const { directory } = payload;

  if (!directory) {
    return { success: false, error: "No directory specified" };
  }

  try {
    // Check if directory exists
    await fs.promises.access(directory);
    await shell.openPath(directory);
    return { success: true };
  } catch (err) {
    return { success: false, error: err.message };
  }
}

// Auto-save writes `{hostDir}/{YYYY-MM-DDTHH-MM-SS}.{txt|log|html}`.
// Manual export / continuous logs commonly write `{label}_{YYYY-MM-DDTHH-MM-SS}.{ext}`.
const SESSION_LOG_TIMESTAMP_FILE = /^\d{4}-\d{2}-\d{2}T\d{2}-\d{2}-\d{2}\.(txt|log|html)$/i;
const SESSION_LOG_LABELED_FILE = /^.+_\d{4}-\d{2}-\d{2}T\d{2}-\d{2}-\d{2}\.(txt|log|html)$/i;

/**
 * True when a basename matches a Netcatty session-log artifact filename.
 * Used so "clear all" never wipes unrelated files in a shared save directory.
 */
function isSessionLogArtifactName(name) {
  const base = path.basename(String(name || ""));
  return SESSION_LOG_TIMESTAMP_FILE.test(base) || SESSION_LOG_LABELED_FILE.test(base);
}

/**
 * Live write targets from this process's sessionLogStreamManager.
 * Main and terminal worker each own a separate module instance.
 * @returns {string[]}
 */
function getLocalActiveLogPaths() {
  const sessionLogStreamManager = require("./sessionLogStreamManager.cjs");
  if (typeof sessionLogStreamManager.getActiveLogPaths !== "function") return [];
  return sessionLogStreamManager.getActiveLogPaths()
    .filter((p) => typeof p === "string" && p.length > 0)
    .map((p) => path.resolve(p));
}

/**
 * True when the terminal worker process is already running (or the manager
 * does not expose a probe — unit-test mocks that only provide request()).
 * Avoids cold-starting the utilityProcess solely for clear-all.
 * @param {object|null} terminalWorkerManager
 * @returns {boolean}
 */
function isTerminalWorkerRunning(terminalWorkerManager) {
  if (!terminalWorkerManager) return false;
  if (typeof terminalWorkerManager.isRunning === "function") {
    return Boolean(terminalWorkerManager.isRunning());
  }
  // Mocks that only supply request() — treat as queryable.
  return typeof terminalWorkerManager.request === "function";
}

/**
 * Union of active log paths from the main process and the terminal worker.
 * Worker-owned auto-save streams are invisible to the main-process manager.
 * @param {object|null} terminalWorkerManager
 * @returns {Promise<Set<string>>}
 */
async function collectActiveLogPaths(terminalWorkerManager = null) {
  const activeLogPaths = new Set(getLocalActiveLogPaths());

  if (!isTerminalWorkerRunning(terminalWorkerManager)) {
    return activeLogPaths;
  }

  try {
    const result = await terminalWorkerManager.request(
      "netcatty:sessionLogs:getActivePaths",
      {},
      {},
    );
    const workerPaths = Array.isArray(result)
      ? result
      : (Array.isArray(result?.paths) ? result.paths : []);
    for (const p of workerPaths) {
      if (typeof p === "string" && p.length > 0) {
        activeLogPaths.add(path.resolve(p));
      }
    }
  } catch {
    // Worker unavailable or channel missing — main-process paths only.
  }

  return activeLogPaths;
}

/**
 * Delete known session-log artifacts inside the configured save directory
 * (used by the "clear all logs" action in Settings).
 *
 * Only removes:
 * - Top-level files matching session-log filename patterns
 * - Host subdirectories that exclusively contain session-log files
 * - Session-log files inside mixed host subdirectories (other entries kept)
 *
 * Never deletes unrelated top-level files/folders (e.g. Documents/Downloads
 * when the user pointed the save directory at a shared folder).
 *
 * Active auto-save / continuous-log write targets are skipped so clear-all
 * never unlinks a live stream (orphan inode / silent stop). Paths include
 * both main-process streams and worker-owned streams when a terminal worker
 * is running.
 */
async function clearSessionLogsDir(event, payload = {}, terminalWorkerManager = null) {
  const { directory } = payload;

  if (!directory) {
    return { success: false, deletedCount: 0, failedCount: 0, error: "No directory specified" };
  }

  let deletedCount = 0;
  let failedCount = 0;

  // Live write targets (main + worker) — skip these paths.
  const activeLogPaths = await collectActiveLogPaths(terminalWorkerManager);
  const isActiveLogPath = (filePath) => activeLogPaths.has(path.resolve(filePath));

  try {
    const entries = await fs.promises.readdir(directory, { withFileTypes: true });
    for (const entry of entries) {
      const entryPath = path.join(directory, entry.name);

      // Skip anything that is not a plain file or directory (symlinks, sockets, …).
      // Use dirent type when available; fall back to lstat for exotic FS entries.
      let isFile = entry.isFile();
      let isDirectory = entry.isDirectory();
      if ((!isFile && !isDirectory) || entry.isSymbolicLink()) {
        // Dirent may report the target type for some platforms; re-check with lstat
        // so we never follow or delete symlink targets outside the save directory.
        try {
          const st = await fs.promises.lstat(entryPath);
          if (st.isSymbolicLink()) continue;
          isFile = st.isFile();
          isDirectory = st.isDirectory();
        } catch {
          continue;
        }
      }
      if (!isFile && !isDirectory) continue;

      try {
        if (isFile) {
          if (!isSessionLogArtifactName(entry.name)) continue;
          if (isActiveLogPath(entryPath)) continue;
          await fs.promises.rm(entryPath, { force: true });
          deletedCount++;
          continue;
        }

        // Host subdirectory created by auto-save: only touch known log files.
        const nested = await fs.promises.readdir(entryPath, { withFileTypes: true });
        const logFiles = [];
        let hasNonLogEntry = false;
        let hasActiveLog = false;
        const resolvedEntryPath = path.resolve(entryPath);

        // txt/html streams may not create a file until the first snapshot flush, so
        // the active path may be absent from readdir. Any registered active path
        // whose parent is this host dir still counts as live work.
        for (const activePath of activeLogPaths) {
          if (path.dirname(activePath) === resolvedEntryPath) {
            hasActiveLog = true;
            break;
          }
        }

        for (const nestedEntry of nested) {
          const nestedPath = path.join(entryPath, nestedEntry.name);
          let nestedIsFile = nestedEntry.isFile();
          if (nestedEntry.isSymbolicLink() || (!nestedIsFile && !nestedEntry.isDirectory())) {
            try {
              const st = await fs.promises.lstat(nestedPath);
              if (st.isSymbolicLink() || !st.isFile()) {
                hasNonLogEntry = true;
                continue;
              }
              nestedIsFile = true;
            } catch {
              hasNonLogEntry = true;
              continue;
            }
          }
          if (nestedIsFile && isSessionLogArtifactName(nestedEntry.name)) {
            if (isActiveLogPath(nestedPath)) {
              hasActiveLog = true;
            } else {
              logFiles.push(nestedPath);
            }
          } else {
            hasNonLogEntry = true;
          }
        }

        if (logFiles.length === 0 && !hasActiveLog) {
          // Not an app host-log folder (or empty / only non-log content) — leave it alone.
          continue;
        }

        if (!hasNonLogEntry && !hasActiveLog) {
          // Pure session-log host folder with no live streams: remove as one artifact.
          await fs.promises.rm(entryPath, { recursive: true, force: true });
          deletedCount++;
        } else {
          // Mixed directory and/or active streams: only delete inactive known log files.
          for (const logPath of logFiles) {
            try {
              await fs.promises.rm(logPath, { force: true });
              deletedCount++;
            } catch (err) {
              failedCount++;
              console.error(`[SessionLogs] Could not delete ${path.basename(logPath)}:`, err.message);
            }
          }
        }
      } catch (err) {
        failedCount++;
        console.error(`[SessionLogs] Could not delete ${entry.name}:`, err.message);
      }
    }
    return { success: true, deletedCount, failedCount };
  } catch (err) {
    if (err?.code === "ENOENT") {
      return { success: true, deletedCount: 0, failedCount: 0 };
    }
    console.error("[SessionLogs] Failed to clear session logs directory:", err);
    return { success: false, deletedCount, failedCount, error: err.message };
  }
}

/**
 * Resolve a manual session-log destination via the save dialog (and optional
 * overwrite confirm). Separated from stream start so the renderer can re-sample
 * alternate-screen / initial-line state after the dialog closes.
 *
 * The selected path is stored only in the main process. Callers receive an
 * opaque selectionToken for startManualSessionLog — renderer-supplied paths are
 * never trusted for open/truncate.
 */
async function chooseManualSessionLogPath(event, payload = {}) {
  const { sessionId, sessionName, preferredDirectory } = payload;
  if (!sessionId) {
    return { success: false, canceled: false, error: "Missing sessionId" };
  }

  const targetDirectory = typeof preferredDirectory === "string" && preferredDirectory.trim()
    ? preferredDirectory.trim()
    : require("node:os").homedir();
  const format = SESSION_LOG_FORMATS.has(payload.format) ? payload.format : "raw";
  const extension = format === "raw" ? "log" : format;
  const displaySessionName = sessionName || sessionId;
  const safeSessionName = safePathSegment(displaySessionName, "session");
  const defaultPath = path.join(targetDirectory, `${safeSessionName}_${toLocalISOString(new Date())}.${extension}`);

  try {
    const result = await dialog.showSaveDialog({
      defaultPath,
      filters: [
        { name: format === "txt" ? "Text Files" : format === "html" ? "HTML Files" : "Log Files", extensions: [extension] },
        { name: "All Files", extensions: ["*"] },
      ],
    });

    if (result.canceled || !result.filePath) {
      return { success: true, canceled: true };
    }

    const filePath = normalizeManualSessionLogFilePath(result.filePath, extension);
    if (filePath !== result.filePath && !(await confirmManualSessionLogOverwrite(filePath))) {
      return { success: true, canceled: true };
    }

    // Drop any prior unused selection for this session so only the latest dialog
    // result can be redeemed.
    for (const [token, pending] of pendingManualSessionLogChoices) {
      if (pending.sessionId === sessionId) pendingManualSessionLogChoices.delete(token);
    }

    const selectionToken = crypto.randomBytes(16).toString("hex");
    pendingManualSessionLogChoices.set(selectionToken, {
      sessionId,
      filePath,
      format,
      senderId: event?.sender?.id ?? null,
    });

    return {
      success: true,
      canceled: false,
      selectionToken,
      // Informational for UI/tests; start must redeem selectionToken, not this path.
      filePath,
      format,
    };
  } catch (err) {
    return { success: false, canceled: false, error: err?.message || String(err) };
  }
}

function redeemManualSessionLogSelection(event, sessionId, selectionToken) {
  if (typeof selectionToken !== "string" || !selectionToken) return null;
  const pending = pendingManualSessionLogChoices.get(selectionToken);
  if (!pending || pending.sessionId !== sessionId) return null;
  const senderId = event?.sender?.id;
  if (pending.senderId != null && senderId != null && pending.senderId !== senderId) {
    return null;
  }
  pendingManualSessionLogChoices.delete(selectionToken);
  return pending;
}

async function startManualSessionLog(event, payload = {}) {
  const sessionLogStreamManager = require("./sessionLogStreamManager.cjs");
  const { sessionId, sessionName, preferredDirectory, initialLine } = payload;
  if (!sessionId) {
    return { success: false, started: false, error: "Missing sessionId" };
  }

  if (sessionLogStreamManager.hasStream(sessionId)) {
    return { success: false, started: false, error: "Session log is already active" };
  }

  const displaySessionName = sessionName || sessionId;
  let filePath = "";
  let format = SESSION_LOG_FORMATS.has(payload.format) ? payload.format : "raw";

  try {
    if (typeof payload.selectionToken === "string" && payload.selectionToken) {
      const pending = redeemManualSessionLogSelection(event, sessionId, payload.selectionToken);
      if (!pending) {
        return {
          success: false,
          started: false,
          error: "Invalid or expired session log selection",
        };
      }
      filePath = pending.filePath;
      format = pending.format;
    } else if (typeof payload.filePath === "string" && payload.filePath.trim()) {
      // Do not trust renderer-supplied paths: they bypass the save dialog and
      // overwrite confirmation and could truncate arbitrary writable files.
      return {
        success: false,
        started: false,
        error: "Session log path must be chosen via the save dialog",
      };
    } else {
      // One-shot callers / tests: show the dialog and start immediately.
      const chosen = await chooseManualSessionLogPath(event, {
        sessionId,
        sessionName,
        preferredDirectory,
        format,
      });
      if (!chosen.success) {
        return { success: false, started: false, error: chosen.error || "Failed to choose session log path" };
      }
      if (chosen.canceled || !chosen.selectionToken) {
        return { success: true, started: false, canceled: true };
      }
      const pending = redeemManualSessionLogSelection(event, sessionId, chosen.selectionToken);
      if (!pending) {
        return { success: false, started: false, error: "Invalid or expired session log selection" };
      }
      filePath = pending.filePath;
      format = pending.format;
    }

    const startResult = sessionLogStreamManager.startStreamToFile(sessionId, {
      filePath,
      format,
      hostLabel: displaySessionName,
      startTime: Date.now(),
      timestampsEnabled: Boolean(payload.timestampsEnabled),
      initialLine: typeof initialLine === "string" ? initialLine : "",
      separateInitialLineBeforeLeadingCarriageReturn: true,
      stopRequiresToken: true,
      // Caller should sample this after the save dialog resolves so enter/leave
      // while the dialog is open does not seed a stale alternate-screen mode.
      alternateScreenActive: payload.alternateScreenActive === true,
    });

    if (!startResult.ok) {
      return { success: false, started: false, error: startResult.error || "Failed to start session log" };
    }

    manualSessionLogTokens.set(sessionId, startResult.token);
    return { success: true, started: true, filePath };
  } catch (err) {
    return { success: false, started: false, error: err?.message || String(err) };
  }
}

function normalizeManualSessionLogFilePath(filePath, extension = "log") {
  return path.extname(filePath).toLowerCase() === `.${extension}` ? filePath : `${filePath}.${extension}`;
}

async function confirmManualSessionLogOverwrite(filePath) {
  try {
    await fs.promises.access(filePath, fs.constants.F_OK);
  } catch (err) {
    if (err?.code === "ENOENT") return true;
    throw err;
  }

  const result = await dialog.showMessageBox({
    type: "warning",
    buttons: ["Overwrite", "Cancel"],
    defaultId: 1,
    cancelId: 1,
    noLink: true,
    title: "Overwrite session log?",
    message: `"${path.basename(filePath)}" already exists.`,
    detail: "Choose Overwrite to replace it, or Cancel to keep the existing file.",
  });

  return result.response === 0;
}

async function stopManualSessionLog(event, payload = {}) {
  const sessionLogStreamManager = require("./sessionLogStreamManager.cjs");
  const { sessionId } = payload;
  if (!sessionId) {
    return { success: false, stopped: false, error: "Missing sessionId" };
  }

  try {
    const token = manualSessionLogTokens.get(sessionId);
    if (!token) {
      return { success: true, stopped: false };
    }

    const filePath = await sessionLogStreamManager.stopStream(sessionId, token);
    if (!filePath) {
      if (!sessionLogStreamManager.hasStream(sessionId)) {
        manualSessionLogTokens.delete(sessionId);
        return { success: false, stopped: true, error: "Failed to finalize session log" };
      }
      return { success: true, stopped: false };
    }
    manualSessionLogTokens.delete(sessionId);
    return { success: true, stopped: true, filePath };
  } catch (err) {
    return { success: false, stopped: false, error: err?.message || String(err) };
  }
}

async function getManualSessionLogStatus(event, payload = {}) {
  const sessionLogStreamManager = require("./sessionLogStreamManager.cjs");
  const { sessionId } = payload;
  if (!sessionId) {
    return { success: false, isLogging: false, error: "Missing sessionId" };
  }
  return { success: true, isLogging: sessionLogStreamManager.hasStream(sessionId) };
}

/**
 * Worker-side handlers only. The terminal utilityProcess has its own
 * sessionLogStreamManager instance; main queries these paths before clear-all.
 */
function registerWorkerHandlers(ipcMain) {
  ipcMain.handle("netcatty:sessionLogs:getActivePaths", async () => getLocalActiveLogPaths());
}

/**
 * Register IPC handlers for session logs operations
 */
function registerHandlers(ipcMain, options = {}) {
  const terminalWorkerManager = options.terminalWorkerManager || null;

  ipcMain.handle("netcatty:sessionLogs:export", exportSessionLog);
  ipcMain.handle("netcatty:sessionLogs:selectDir", selectSessionLogsDir);
  ipcMain.handle("netcatty:sessionLogs:autoSave", autoSaveSessionLog);
  ipcMain.handle("netcatty:sessionLogs:openDir", openSessionLogsDir);
  ipcMain.handle(
    "netcatty:sessionLogs:clear",
    (event, payload) => clearSessionLogsDir(event, payload, terminalWorkerManager),
  );
  // Main can also answer this (manual / script streams) for symmetry / tests.
  ipcMain.handle("netcatty:sessionLogs:getActivePaths", async () => getLocalActiveLogPaths());
  ipcMain.handle("netcatty:sessionLog:manualChoosePath", chooseManualSessionLogPath);
  ipcMain.handle("netcatty:sessionLog:manualStart", startManualSessionLog);
  ipcMain.handle("netcatty:sessionLog:manualStop", stopManualSessionLog);
  ipcMain.handle("netcatty:sessionLog:manualStatus", getManualSessionLogStatus);

  // In the default terminal-worker runtime, sessions run in a utilityProcess
  // and call appendData() on the worker's own sessionLogStreamManager module
  // instance. Manual session logs (and script session logs) are started in
  // the *main* process, so without this tap their streams never receive any
  // terminal output — the saved file would only contain the initial prompt
  // line captured from the renderer buffer (issue #1938). The worker already
  // mirrors every output chunk to the main process for script output buffers;
  // feed that same stream into the main-process log streams. appendData() is
  // a no-op for sessions without an active main-process stream.
  terminalWorkerManager?.addOutputTap?.((sessionId, data) => {
    if (typeof data !== "string" || data.length === 0) return;
    require("./sessionLogStreamManager.cjs").appendData(sessionId, data);
  });
}

module.exports = {
  registerHandlers,
  registerWorkerHandlers,
  exportSessionLog,
  selectSessionLogsDir,
  autoSaveSessionLog,
  openSessionLogsDir,
  clearSessionLogsDir,
  collectActiveLogPaths,
  getLocalActiveLogPaths,
  isSessionLogArtifactName,
  chooseManualSessionLogPath,
  startManualSessionLog,
  stopManualSessionLog,
  getManualSessionLogStatus,
  toLocalISOString,
  terminalDataToHtml,
  terminalPlainTextToHtml,
  wrapTerminalHtmlContent,
  safePathSegment,
};