Netcatty/components/Terminal.tsx

import { Terminal as XTerm } from "@xterm/xterm";
import { FitAddon } from "@xterm/addon-fit";
import { SerializeAddon } from "@xterm/addon-serialize";
import { SearchAddon } from "@xterm/addon-search";
import "@xterm/xterm/css/xterm.css";
import { Maximize2, Radio } from "lucide-react";
import React, { memo, useEffect, useMemo, useRef, useState } from "react";
import { useI18n } from "../application/i18n/I18nProvider";
import { logger } from "../lib/logger";
import { cn } from "../lib/utils";
import {
  Host,
  Identity,
  KnownHost,
  SSHKey,
  Snippet,
  TerminalSession,
  TerminalTheme,
  TerminalSettings,
  KeyBinding,
} from "../types";
import { resolveHostAuth } from "../domain/sshAuth";
import { useTerminalBackend } from "../application/state/useTerminalBackend";
import KnownHostConfirmDialog, { HostKeyInfo } from "./KnownHostConfirmDialog";
import SFTPModal from "./SFTPModal";
import { Button } from "./ui/button";
import { toast } from "./ui/toast";
import { TERMINAL_FONTS } from "../infrastructure/config/fonts";
import { TERMINAL_THEMES } from "../infrastructure/config/terminalThemes";

import { TerminalConnectionDialog } from "./terminal/TerminalConnectionDialog";
import { TerminalToolbar } from "./terminal/TerminalToolbar";
import { TerminalContextMenu } from "./terminal/TerminalContextMenu";
import { TerminalSearchBar } from "./terminal/TerminalSearchBar";
import { createHighlightProcessor } from "./terminal/keywordHighlight";
import { createTerminalSessionStarters, type PendingAuth } from "./terminal/runtime/createTerminalSessionStarters";
import { createXTermRuntime, type XTermRuntime } from "./terminal/runtime/createXTermRuntime";
import { XTERM_PERFORMANCE_CONFIG } from "../infrastructure/config/xtermPerformance";
import { useTerminalSearch } from "./terminal/hooks/useTerminalSearch";
import { useTerminalContextActions } from "./terminal/hooks/useTerminalContextActions";
import { useTerminalAuthState } from "./terminal/hooks/useTerminalAuthState";

interface TerminalProps {
  host: Host;
  keys: SSHKey[];
  identities: Identity[];
  snippets: Snippet[];
  allHosts?: Host[];
  knownHosts?: KnownHost[];
  isVisible: boolean;
  inWorkspace?: boolean;
  isResizing?: boolean;
  isFocusMode?: boolean;
  isFocused?: boolean;
  fontFamilyId: string;
  fontSize: number;
  terminalTheme: TerminalTheme;
  terminalSettings?: TerminalSettings;
  sessionId: string;
  startupCommand?: string;
  onUpdateTerminalThemeId?: (themeId: string) => void;
  onUpdateTerminalFontFamilyId?: (fontFamilyId: string) => void;
  onUpdateTerminalFontSize?: (fontSize: number) => void;
  hotkeyScheme?: "disabled" | "mac" | "pc";
  keyBindings?: KeyBinding[];
  onHotkeyAction?: (action: string, event: KeyboardEvent) => void;
  onStatusChange?: (sessionId: string, status: TerminalSession["status"]) => void;
  onSessionExit?: (sessionId: string) => void;
  onTerminalDataCapture?: (sessionId: string, data: string) => void;
  onOsDetected?: (hostId: string, distro: string) => void;
  onCloseSession?: (sessionId: string) => void;
  onUpdateHost?: (host: Host) => void;
  onAddKnownHost?: (knownHost: KnownHost) => void;
  onExpandToFocus?: () => void;
  onCommandExecuted?: (
    command: string,
    hostId: string,
    hostLabel: string,
    sessionId: string,
  ) => void;
  onSplitHorizontal?: () => void;
  onSplitVertical?: () => void;
  isBroadcastEnabled?: boolean;
  onToggleBroadcast?: () => void;
  onBroadcastInput?: (data: string, sourceSessionId: string) => void;
}

const TerminalComponent: React.FC<TerminalProps> = ({
  host,
  keys,
  identities,
  snippets,
  allHosts = [],
  knownHosts: _knownHosts = [],
  isVisible,
  inWorkspace,
  isResizing,
  isFocusMode,
  isFocused,
  fontFamilyId,
  fontSize,
  terminalTheme,
  terminalSettings,
  sessionId,
  startupCommand,
  onUpdateTerminalThemeId,
  onUpdateTerminalFontFamilyId,
  onUpdateTerminalFontSize,
  hotkeyScheme = "disabled",
  keyBindings = [],
  onHotkeyAction,
  onStatusChange,
  onSessionExit,
  onTerminalDataCapture,
  onOsDetected,
  onCloseSession,
  onUpdateHost,
  onAddKnownHost,
  onExpandToFocus,
  onCommandExecuted,
  onSplitHorizontal,
  onSplitVertical,
  isBroadcastEnabled,
  onToggleBroadcast,
  onBroadcastInput,
}) => {
  const CONNECTION_TIMEOUT = 12000;
  const { t } = useI18n();
  const containerRef = useRef<HTMLDivElement>(null);
  const termRef = useRef<XTerm | null>(null);
  const fitAddonRef = useRef<FitAddon | null>(null);
  const serializeAddonRef = useRef<SerializeAddon | null>(null);
  const searchAddonRef = useRef<SearchAddon | null>(null);
  const xtermRuntimeRef = useRef<XTermRuntime | null>(null);
  const disposeDataRef = useRef<(() => void) | null>(null);
  const disposeExitRef = useRef<(() => void) | null>(null);
  const sessionRef = useRef<string | null>(null);
  const hasConnectedRef = useRef(false);
  const hasRunStartupCommandRef = useRef(false);
  const commandBufferRef = useRef<string>("");

  const terminalSettingsRef = useRef(terminalSettings);
  terminalSettingsRef.current = terminalSettings;

  const highlightProcessorRef = useRef<(text: string) => string>((t) => t);
  useEffect(() => {
    highlightProcessorRef.current = createHighlightProcessor(
      terminalSettings?.keywordHighlightRules ?? [],
      terminalSettings?.keywordHighlightEnabled ?? false,
    );
  }, [terminalSettings?.keywordHighlightEnabled, terminalSettings?.keywordHighlightRules]);

  const hotkeySchemeRef = useRef(hotkeyScheme);
  const keyBindingsRef = useRef(keyBindings);
  const onHotkeyActionRef = useRef(onHotkeyAction);
  hotkeySchemeRef.current = hotkeyScheme;
  keyBindingsRef.current = keyBindings;
  onHotkeyActionRef.current = onHotkeyAction;

  const isBroadcastEnabledRef = useRef(isBroadcastEnabled);
  const onBroadcastInputRef = useRef(onBroadcastInput);
  isBroadcastEnabledRef.current = isBroadcastEnabled;
  onBroadcastInputRef.current = onBroadcastInput;

  const terminalBackend = useTerminalBackend();
  const { resizeSession } = terminalBackend;

  const [isScriptsOpen, setIsScriptsOpen] = useState(false);
  const [status, setStatus] = useState<TerminalSession["status"]>("connecting");
  const [error, setError] = useState<string | null>(null);
  const lastToastedErrorRef = useRef<string | null>(null);
  const [showLogs, setShowLogs] = useState(false);
  const [progressLogs, setProgressLogs] = useState<string[]>([]);
  const [timeLeft, setTimeLeft] = useState(CONNECTION_TIMEOUT / 1000);
  const [isCancelling, setIsCancelling] = useState(false);
  const [showSFTP, setShowSFTP] = useState(false);
  const [progressValue, setProgressValue] = useState(15);
  const [hasSelection, setHasSelection] = useState(false);

  const statusRef = useRef<TerminalSession["status"]>(status);
  statusRef.current = status;

  const [chainProgress, setChainProgress] = useState<{
    currentHop: number;
    totalHops: number;
    currentHostLabel: string;
  } | null>(null);

  const terminalSearch = useTerminalSearch({ searchAddonRef, termRef });
  const {
    isSearchOpen,
    setIsSearchOpen,
    searchMatchCount,
    handleToggleSearch,
    handleSearch,
    handleFindNext,
    handleFindPrevious,
    handleCloseSearch,
  } = terminalSearch;

  useEffect(() => {
    if (!error) {
      lastToastedErrorRef.current = null;
      return;
    }
    if (lastToastedErrorRef.current === error) return;
    lastToastedErrorRef.current = error;
    toast.error(error, t("terminal.connectionErrorTitle"));
  }, [error, t]);

  const pendingAuthRef = useRef<PendingAuth>(null);
  const sessionStartersRef = useRef<ReturnType<typeof createTerminalSessionStarters> | null>(null);
  const auth = useTerminalAuthState({
    host,
    pendingAuthRef,
    termRef,
    onUpdateHost,
    onStartSsh: (term) => {
      sessionStartersRef.current?.startSSH(term);
    },
    setStatus: (next) => setStatus(next),
    setProgressLogs,
  });

  const [needsHostKeyVerification, setNeedsHostKeyVerification] = useState(false);
  const [pendingHostKeyInfo, setPendingHostKeyInfo] = useState<HostKeyInfo | null>(null);
  const pendingConnectionRef = useRef<(() => void) | null>(null);

  const effectiveTheme = useMemo(() => {
    if (host.theme) {
      const hostTheme = TERMINAL_THEMES.find((t) => t.id === host.theme);
      if (hostTheme) return hostTheme;
    }
    return terminalTheme;
  }, [host.theme, terminalTheme]);

  const resolvedChainHosts =
    (host.hostChain?.hostIds
      ?.map((id) => allHosts.find((h) => h.id === id))
      .filter(Boolean) as Host[]) || [];

  const updateStatus = (next: TerminalSession["status"]) => {
    setStatus(next);
    hasConnectedRef.current = next === "connected";
    onStatusChange?.(sessionId, next);
  };

  const cleanupSession = () => {
    disposeDataRef.current?.();
    disposeDataRef.current = null;
    disposeExitRef.current?.();
    disposeExitRef.current = null;

    if (sessionRef.current) {
      try {
        terminalBackend.closeSession(sessionRef.current);
      } catch (err) {
        logger.warn("Failed to close SSH session", err);
      }
    }
    sessionRef.current = null;
  };

  const teardown = () => {
    cleanupSession();
    xtermRuntimeRef.current?.dispose();
    xtermRuntimeRef.current = null;
    termRef.current = null;
    fitAddonRef.current = null;
    serializeAddonRef.current = null;
    searchAddonRef.current = null;
  };

  const sessionStarters = createTerminalSessionStarters({
    host,
    keys,
    identities,
    resolvedChainHosts,
    sessionId,
    startupCommand,
    terminalSettings,
    terminalBackend,
    sessionRef,
    hasConnectedRef,
    hasRunStartupCommandRef,
    disposeDataRef,
    disposeExitRef,
    fitAddonRef,
    serializeAddonRef,
    highlightProcessorRef,
    pendingAuthRef,
    updateStatus,
    setStatus,
    setError,
    setNeedsAuth: auth.setNeedsAuth,
    setAuthRetryMessage: auth.setAuthRetryMessage,
    setAuthPassword: auth.setAuthPassword,
    setProgressLogs,
    setProgressValue,
    setChainProgress,
    onSessionExit,
    onTerminalDataCapture,
    onOsDetected,
    onCommandExecuted,
  });
  sessionStartersRef.current = sessionStarters;

  useEffect(() => {
    let disposed = false;
    setError(null);
    hasConnectedRef.current = false;
    setProgressLogs([]);
    setShowLogs(false);
    setIsCancelling(false);

    const boot = async () => {
      try {
        if (disposed || !containerRef.current) return;

        const runtime = createXTermRuntime({
          container: containerRef.current,
          host,
          fontFamilyId,
          fontSize,
          terminalTheme: effectiveTheme,
          terminalSettingsRef,
          terminalBackend,
          sessionRef,
          hotkeySchemeRef,
          keyBindingsRef,
          onHotkeyActionRef,
          isBroadcastEnabledRef,
          onBroadcastInputRef,
          sessionId,
          statusRef,
          onCommandExecuted,
          commandBufferRef,
          setIsSearchOpen,
        });

        xtermRuntimeRef.current = runtime;
        termRef.current = runtime.term;
        fitAddonRef.current = runtime.fitAddon;
        serializeAddonRef.current = runtime.serializeAddon;
        searchAddonRef.current = runtime.searchAddon;

        const term = runtime.term;

        if (host.protocol === "local" || host.hostname === "localhost") {
          setStatus("connecting");
          setProgressLogs(["Initializing local shell..."]);
          await sessionStarters.startLocal(term);
        } else if (host.protocol === "telnet") {
          setStatus("connecting");
          setProgressLogs(["Initializing Telnet connection..."]);
          await sessionStarters.startTelnet(term);
        } else if (host.moshEnabled) {
          setStatus("connecting");
          setProgressLogs(["Initializing Mosh connection..."]);
          await sessionStarters.startMosh(term);
        } else {
          const resolvedAuth = resolveHostAuth({ host, keys, identities });
          const hasPassword = !!resolvedAuth.password;
          const hasKey = !!resolvedAuth.keyId;
          const hasPendingAuth = pendingAuthRef.current;

          if (
            !hasPassword &&
            !hasKey &&
            !hasPendingAuth &&
            !resolvedAuth.username
          ) {
            auth.setNeedsAuth(true);
            setStatus("disconnected");
            return;
          }

          setStatus("connecting");
          setProgressLogs(["Initializing secure channel..."]);
          await sessionStarters.startSSH(term);
        }
      } catch (err) {
        logger.error("Failed to initialize terminal", err);
        setError(err instanceof Error ? err.message : String(err));
        updateStatus("disconnected");
      }
    };

    boot();

    return () => {
      disposed = true;
      if (onTerminalDataCapture && serializeAddonRef.current) {
        try {
          const terminalData = serializeAddonRef.current.serialize();
          logger.info("[Terminal] Capturing data on unmount", { sessionId, dataLength: terminalData.length });
          onTerminalDataCapture(sessionId, terminalData);
        } catch (err) {
          logger.warn("Failed to serialize terminal data on unmount:", err);
        }
      }
      teardown();
    };
    // eslint-disable-next-line react-hooks/exhaustive-deps -- Effect only runs on host.id/sessionId change, internal functions are stable
  }, [host.id, sessionId]);

  // Connection timeline and timeout visuals
  useEffect(() => {
    if (status !== "connecting" || auth.needsAuth) return;
    const scripted = [
      "Resolving host and keys...",
      "Negotiating ciphers...",
      "Exchanging keys...",
      "Authenticating user...",
      "Waiting for server greeting...",
    ];
    let idx = 0;
    const stepTimer = setInterval(() => {
      setProgressLogs((prev) => {
        if (idx >= scripted.length) return prev;
        const next = scripted[idx++];
        return prev.includes(next) ? prev : [...prev, next];
      });
    }, 900);

    setTimeLeft(CONNECTION_TIMEOUT / 1000);
    const countdown = setInterval(() => {
      setTimeLeft((prev) => (prev > 0 ? prev - 1 : 0));
    }, 1000);

    const timeout = setTimeout(() => {
      setError("Connection timed out. Please try again.");
      updateStatus("disconnected");
      setProgressLogs((prev) => [...prev, "Connection timed out."]);
    }, CONNECTION_TIMEOUT);

    setProgressValue(5);
    const prog = setInterval(() => {
      setProgressValue((prev) => {
        if (prev >= 95) return prev;
        const remaining = 95 - prev;
        const increment = Math.max(1, remaining * 0.15);
        return Math.min(95, prev + increment);
      });
    }, 200);

    return () => {
      clearInterval(stepTimer);
      clearInterval(countdown);
      clearTimeout(timeout);
      clearInterval(prog);
    };
    // eslint-disable-next-line react-hooks/exhaustive-deps -- updateStatus is a stable internal helper
  }, [status, auth.needsAuth]);

  const safeFit = () => {
    const fitAddon = fitAddonRef.current;
    if (!fitAddon) return;

    const runFit = () => {
      try {
        fitAddon.fit();
      } catch (err) {
        logger.warn("Fit failed", err);
      }
    };

    if (
      XTERM_PERFORMANCE_CONFIG.resize.useRAF &&
      typeof requestAnimationFrame === "function"
    ) {
      requestAnimationFrame(runFit);
    } else {
      runFit();
    }
  };

  useEffect(() => {
    if (termRef.current) {
      const effectiveFontSize = host.fontSize || fontSize;
      termRef.current.options.fontSize = effectiveFontSize;

      termRef.current.options.theme = {
        ...effectiveTheme.colors,
        selectionBackground: effectiveTheme.colors.selection,
      };

      if (terminalSettings) {
        termRef.current.options.cursorStyle = terminalSettings.cursorShape;
        termRef.current.options.cursorBlink = terminalSettings.cursorBlink;
        termRef.current.options.scrollback = terminalSettings.scrollback;
        termRef.current.options.fontWeight = terminalSettings.fontWeight as
          | 100
          | 200
          | 300
          | 400
          | 500
          | 600
          | 700
          | 800
          | 900;
        termRef.current.options.fontWeightBold = terminalSettings.fontWeightBold as
          | 100
          | 200
          | 300
          | 400
          | 500
          | 600
          | 700
          | 800
          | 900;
        termRef.current.options.lineHeight = 1 + terminalSettings.linePadding / 10;
        termRef.current.options.drawBoldTextInBrightColors =
          terminalSettings.drawBoldInBrightColors;
        termRef.current.options.minimumContrastRatio =
          terminalSettings.minimumContrastRatio;
        termRef.current.options.scrollOnUserInput = terminalSettings.scrollOnInput;
        termRef.current.options.altClickMovesCursor = !terminalSettings.altAsMeta;
        termRef.current.options.wordSeparator = terminalSettings.wordSeparators;
      }

      setTimeout(() => safeFit(), 50);
    }
  }, [fontSize, effectiveTheme, terminalSettings, host.fontSize]);

  useEffect(() => {
    if (termRef.current) {
      const effectiveFontSize = host.fontSize || fontSize;
      termRef.current.options.fontSize = effectiveFontSize;

      const hostFontId = host.fontFamily || fontFamilyId || "menlo";
      const fontObj = TERMINAL_FONTS.find((f) => f.id === hostFontId) || TERMINAL_FONTS[0];
      termRef.current.options.fontFamily = fontObj.family;

      termRef.current.options.theme = {
        ...effectiveTheme.colors,
        selectionBackground: effectiveTheme.colors.selection,
      };

      setTimeout(() => safeFit(), 50);
    }
  }, [host.fontSize, host.fontFamily, host.theme, fontFamilyId, fontSize, effectiveTheme]);

  useEffect(() => {
    if (isVisible && fitAddonRef.current) {
      const timer = setTimeout(() => safeFit(), 50);
      return () => clearTimeout(timer);
    }
  }, [isVisible]);

  useEffect(() => {
    let cancelled = false;
    const waitForFonts = async () => {
      try {
        const fontFaceSet = document.fonts as FontFaceSet | undefined;
        if (!fontFaceSet?.ready) return;
        await fontFaceSet.ready;
        if (cancelled) return;

        const term = termRef.current as {
          cols: number;
          rows: number;
          renderer?: { remeasureFont?: () => void };
        } | null;
        const fitAddon = fitAddonRef.current;
        try {
          term?.renderer?.remeasureFont?.();
        } catch (err) {
          logger.warn("Font remeasure failed", err);
        }

        try {
          fitAddon?.fit();
        } catch (err) {
          logger.warn("Fit after fonts ready failed", err);
        }

        const id = sessionRef.current;
        if (id && term) {
          try {
            resizeSession(id, term.cols, term.rows);
          } catch (err) {
            logger.warn("Resize session after fonts ready failed", err);
          }
        }
      } catch (err) {
        logger.warn("Waiting for fonts failed", err);
      }
    };

    waitForFonts();
    return () => {
      cancelled = true;
    };
  }, [host.id, sessionId, resizeSession]);

  useEffect(() => {
    if (!containerRef.current || !fitAddonRef.current) return;

    let resizeTimeout: ReturnType<typeof setTimeout> | null = null;

    const observer = new ResizeObserver(() => {
      if (isResizing) return;
      if (resizeTimeout) {
        clearTimeout(resizeTimeout);
      }
      resizeTimeout = setTimeout(() => {
        safeFit();
      }, 250);
    });

    observer.observe(containerRef.current);
    return () => {
      if (resizeTimeout) clearTimeout(resizeTimeout);
      observer.disconnect();
    };
  }, [isVisible, isResizing]);

  const prevIsResizingRef = useRef(isResizing);
  useEffect(() => {
    if (prevIsResizingRef.current && !isResizing && isVisible) {
      const timer = setTimeout(() => {
        safeFit();
      }, 100);
      return () => clearTimeout(timer);
    }
    prevIsResizingRef.current = isResizing;
  }, [isResizing, isVisible]);

  useEffect(() => {
    if (!isVisible || !fitAddonRef.current) return;
    const timer = setTimeout(() => {
      safeFit();
    }, 100);
    return () => clearTimeout(timer);
  }, [inWorkspace, isVisible]);

  useEffect(() => {
    const shouldAutoFocus = isVisible && termRef.current && (!inWorkspace || isFocusMode);
    if (shouldAutoFocus) {
      const timer = setTimeout(() => {
        termRef.current?.focus();
      }, 50);
      return () => clearTimeout(timer);
    }
  }, [isVisible, inWorkspace, isFocusMode]);

  useEffect(() => {
    if (isFocused && termRef.current && isVisible) {
      const timer = setTimeout(() => {
        termRef.current?.focus();
      }, 10);
      return () => clearTimeout(timer);
    }
  }, [isFocused, isVisible, sessionId]);

  useEffect(() => {
    const term = termRef.current;
    if (!term) return;

    const onSelectionChange = () => {
      const selection = term.getSelection();
      const hasText = !!selection && selection.length > 0;
      setHasSelection(hasText);

      if (hasText && terminalSettings?.copyOnSelect) {
        navigator.clipboard.writeText(selection).catch((err) => {
          logger.warn("Copy on select failed:", err);
        });
      }
    };

    term.onSelectionChange(onSelectionChange);
  }, [terminalSettings?.copyOnSelect]);

  useEffect(() => {
    let resizeTimeout: ReturnType<typeof setTimeout> | null = null;

    const handler = () => {
      if (resizeTimeout) {
        clearTimeout(resizeTimeout);
      }
      resizeTimeout = setTimeout(() => {
        safeFit();
      }, 250);
    };

    window.addEventListener("resize", handler);
    return () => {
      if (resizeTimeout) clearTimeout(resizeTimeout);
      window.removeEventListener("resize", handler);
    };
  }, []);

  const terminalContextActions = useTerminalContextActions({
    termRef,
    sessionRef,
    terminalBackend,
    onHasSelectionChange: setHasSelection,
  });

  const handleSnippetClick = (cmd: string) => {
    if (sessionRef.current) {
      terminalBackend.writeToSession(sessionRef.current, `${cmd}\r`);
      setIsScriptsOpen(false);
      termRef.current?.focus();
      return;
    }
    termRef.current?.writeln("\r\n[No active SSH session]");
  };

  const handleCancelConnect = () => {
    setIsCancelling(true);
    auth.setNeedsAuth(false);
    auth.setAuthRetryMessage(null);
    setNeedsHostKeyVerification(false);
    setPendingHostKeyInfo(null);
    setError("Connection cancelled");
    setProgressLogs((prev) => [...prev, "Cancelled by user."]);
    cleanupSession();
    updateStatus("disconnected");
    setChainProgress(null);
    setTimeout(() => setIsCancelling(false), 600);
    onCloseSession?.(sessionId);
  };

  const handleHostKeyClose = () => {
    setNeedsHostKeyVerification(false);
    setPendingHostKeyInfo(null);
    handleCancelConnect();
  };

  const handleHostKeyContinue = () => {
    setNeedsHostKeyVerification(false);
    if (pendingConnectionRef.current) {
      pendingConnectionRef.current();
      pendingConnectionRef.current = null;
    }
    setPendingHostKeyInfo(null);
  };

  const handleHostKeyAddAndContinue = () => {
    if (pendingHostKeyInfo && onAddKnownHost) {
      const newKnownHost: KnownHost = {
        id: `kh-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`,
        hostname: pendingHostKeyInfo.hostname,
        port: pendingHostKeyInfo.port || host.port || 22,
        keyType: pendingHostKeyInfo.keyType,
        publicKey: pendingHostKeyInfo.fingerprint,
        discoveredAt: Date.now(),
      };
      onAddKnownHost(newKnownHost);
    }
    setNeedsHostKeyVerification(false);
    if (pendingConnectionRef.current) {
      pendingConnectionRef.current();
      pendingConnectionRef.current = null;
    }
    setPendingHostKeyInfo(null);
  };

  const handleRetry = () => {
    if (!termRef.current) return;
    cleanupSession();
    auth.resetForRetry();
    setStatus("connecting");
    setError(null);
    setProgressLogs(["Retrying secure channel..."]);
    setShowLogs(true);
    if (host.protocol === "local" || host.hostname === "localhost") {
      sessionStarters.startLocal(termRef.current);
    } else {
      sessionStarters.startSSH(termRef.current);
    }
  };

  const renderControls = (opts?: { showClose?: boolean }) => (
    <TerminalToolbar
      status={status}
      snippets={snippets}
      host={host}
      defaultThemeId={terminalTheme.id}
      defaultFontFamilyId={fontFamilyId}
      defaultFontSize={fontSize}
      onUpdateTerminalThemeId={onUpdateTerminalThemeId}
      onUpdateTerminalFontFamilyId={onUpdateTerminalFontFamilyId}
      onUpdateTerminalFontSize={onUpdateTerminalFontSize}
      isScriptsOpen={isScriptsOpen}
      setIsScriptsOpen={setIsScriptsOpen}
      onOpenSFTP={() => setShowSFTP((v) => !v)}
      onSnippetClick={handleSnippetClick}
      onUpdateHost={onUpdateHost}
      showClose={opts?.showClose}
      onClose={() => onCloseSession?.(sessionId)}
      isSearchOpen={isSearchOpen}
      onToggleSearch={handleToggleSearch}
    />
  );

  const statusDotTone =
    status === "connected"
      ? "bg-emerald-400"
      : status === "connecting"
        ? "bg-amber-400"
        : "bg-rose-500";
  const _isConnecting = status === "connecting";
  const _hasError = Boolean(error);

  return (
    <TerminalContextMenu
      hasSelection={hasSelection}
      hotkeyScheme={hotkeyScheme}
      rightClickBehavior={terminalSettings?.rightClickBehavior}
      onCopy={terminalContextActions.onCopy}
      onPaste={terminalContextActions.onPaste}
      onSelectAll={terminalContextActions.onSelectAll}
      onClear={terminalContextActions.onClear}
      onSelectWord={terminalContextActions.onSelectWord}
      onSplitHorizontal={onSplitHorizontal}
      onSplitVertical={onSplitVertical}
      onClose={inWorkspace ? () => onCloseSession?.(sessionId) : undefined}
    >
      <div className="relative h-full w-full flex overflow-hidden bg-gradient-to-br from-[#050910] via-[#06101a] to-[#0b1220]">
        <div className="absolute left-0 right-0 top-0 z-20 pointer-events-none">
            <div
              className="flex items-center gap-1 px-2 py-0.5 backdrop-blur-md pointer-events-auto min-w-0 border-b-[0.5px]"
              style={{
                backgroundColor: effectiveTheme.colors.background,
                color: effectiveTheme.colors.foreground,
              borderColor: `color-mix(in srgb, ${effectiveTheme.colors.foreground} 8%, ${effectiveTheme.colors.background} 92%)`,
              ['--terminal-toolbar-fg' as never]: effectiveTheme.colors.foreground,
              ['--terminal-toolbar-bg' as never]: effectiveTheme.colors.background,
              ['--terminal-toolbar-btn' as never]: `color-mix(in srgb, ${effectiveTheme.colors.background} 88%, ${effectiveTheme.colors.foreground} 12%)`,
              ['--terminal-toolbar-btn-hover' as never]: `color-mix(in srgb, ${effectiveTheme.colors.background} 78%, ${effectiveTheme.colors.foreground} 22%)`,
              ['--terminal-toolbar-btn-active' as never]: `color-mix(in srgb, ${effectiveTheme.colors.background} 68%, ${effectiveTheme.colors.foreground} 32%)`,
            }}
          >
            <div className="flex items-center gap-1 text-[11px] font-semibold">
              <span className="whitespace-nowrap">{host.label}</span>
              <span
                className={cn(
                  "inline-block h-2 w-2 rounded-full flex-shrink-0",
                  statusDotTone,
                )}
              />
            </div>
            <div className="flex-1" />
            <div className="flex items-center gap-0.5 flex-shrink-0">
              {inWorkspace && onToggleBroadcast && (
                  <Button
                    variant="secondary"
                    size="icon"
                    className={cn(
                      "h-6 w-6 p-0 shadow-none border-none text-[color:var(--terminal-toolbar-fg)]",
                      "bg-transparent hover:bg-transparent",
                      isBroadcastEnabled && "text-green-500",
                    )}
                  onClick={onToggleBroadcast}
                  title={
                    isBroadcastEnabled
                      ? t("terminal.toolbar.broadcastDisable")
                      : t("terminal.toolbar.broadcastEnable")
                  }
                  aria-label={
                    isBroadcastEnabled
                      ? t("terminal.toolbar.broadcastDisable")
                      : t("terminal.toolbar.broadcastEnable")
                  }
                  >
                    <Radio size={12} />
                  </Button>
                )}
                {inWorkspace && !isFocusMode && onExpandToFocus && (
                  <Button
                    variant="secondary"
                    size="icon"
                    className="h-6 w-6 p-0 shadow-none border-none text-[color:var(--terminal-toolbar-fg)] bg-transparent hover:bg-transparent"
                    onClick={onExpandToFocus}
                    title={t("terminal.toolbar.focusMode")}
                    aria-label={t("terminal.toolbar.focusMode")}
                  >
                    <Maximize2 size={12} />
                  </Button>
                )}
              {renderControls({ showClose: inWorkspace })}
            </div>
          </div>
          {isSearchOpen && (
            <div className="pointer-events-auto">
              <TerminalSearchBar
                isOpen={isSearchOpen}
                onClose={handleCloseSearch}
                onSearch={handleSearch}
                onFindNext={handleFindNext}
                onFindPrevious={handleFindPrevious}
                matchCount={searchMatchCount}
              />
            </div>
          )}
        </div>

        <div
          className="h-full flex-1 min-w-0 transition-all duration-300 relative overflow-hidden pt-8"
          style={{ backgroundColor: effectiveTheme.colors.background }}
        >
          <div
            ref={containerRef}
            className="absolute inset-x-0 bottom-0"
            style={{
              top: isSearchOpen ? "64px" : "40px",
              paddingLeft: 6,
              backgroundColor: effectiveTheme.colors.background,
            }}
          />

          {needsHostKeyVerification && pendingHostKeyInfo && (
            <div className="absolute inset-0 z-30 bg-background">
              <KnownHostConfirmDialog
                host={host}
                hostKeyInfo={pendingHostKeyInfo}
                onClose={handleHostKeyClose}
                onContinue={handleHostKeyContinue}
                onAddAndContinue={handleHostKeyAddAndContinue}
              />
            </div>
          )}

          {status !== "connected" && !needsHostKeyVerification && (
            <TerminalConnectionDialog
              host={host}
              status={status}
              error={error}
              progressValue={progressValue}
              chainProgress={chainProgress}
              needsAuth={auth.needsAuth}
              showLogs={showLogs}
              _setShowLogs={setShowLogs}
              keys={keys}
              authProps={{
                authMethod: auth.authMethod,
                setAuthMethod: auth.setAuthMethod,
                authUsername: auth.authUsername,
                setAuthUsername: auth.setAuthUsername,
                authPassword: auth.authPassword,
                setAuthPassword: auth.setAuthPassword,
                authKeyId: auth.authKeyId,
                setAuthKeyId: auth.setAuthKeyId,
                authPassphrase: auth.authPassphrase,
                setAuthPassphrase: auth.setAuthPassphrase,
                showAuthPassphrase: auth.showAuthPassphrase,
                setShowAuthPassphrase: auth.setShowAuthPassphrase,
                showAuthPassword: auth.showAuthPassword,
                setShowAuthPassword: auth.setShowAuthPassword,
                authRetryMessage: auth.authRetryMessage,
                onSubmit: () => auth.submit(),
                onSubmitWithoutSave: () => auth.submit({ saveToHost: false }),
                onCancel: handleCancelConnect,
                isValid: auth.isValid,
              }}
              progressProps={{
                timeLeft,
                isCancelling,
                progressLogs,
                onCancel: handleCancelConnect,
                onRetry: handleRetry,
              }}
            />
          )}
        </div>

        <SFTPModal
          host={host}
          credentials={(() => {
            const resolvedAuth = resolveHostAuth({ host, keys, identities });
            return {
              username: resolvedAuth.username,
              hostname: host.hostname,
              port: host.port,
              password: resolvedAuth.password,
              privateKey: resolvedAuth.key?.privateKey,
              certificate: resolvedAuth.key?.certificate,
              passphrase: resolvedAuth.passphrase,
              publicKey: resolvedAuth.key?.publicKey,
              keyId: resolvedAuth.keyId,
              keySource: resolvedAuth.key?.source,
            };
          })()}
          open={showSFTP && status === "connected"}
          onClose={() => setShowSFTP(false)}
        />
      </div>
    </TerminalContextMenu>
  );
};

const Terminal = memo(TerminalComponent);
Terminal.displayName = "Terminal";

export default Terminal;