// grapho - Unified Personal Data Infrastructure
//
// Four data types:
//   1. Config  - Declarative machine setup (NixOS + Git)
//   2. Sync    - Real-time bidirectional sync (Syncthing)
//   3. Backup  - Periodic snapshots (Restic)
//   4. Server  - Large files on central server
//
// Usage:
//   grapho                    Health check (or welcome if uninitialized)
//   grapho init <repo-url>    Initialize from config repo
//   grapho setup              Interactive setup wizard
//   grapho sync               Sync all folders
//   grapho sync status        Show sync status
//   grapho backup             Run backup now
//   grapho backup list        List snapshots
//   grapho status             Full status dashboard
//   grapho doctor             Diagnose issues
//   grapho help               Show help

// =============================================================================
// Types
// =============================================================================

type SyncStatus =
    | StatusOk
    | StatusWarn
    | StatusErr
    | StatusNone

// =============================================================================
// Status icons
// =============================================================================

fn statusIcon(s: SyncStatus): String =
    match s {
        StatusOk => "[ok]",
        StatusWarn => "[!!]",
        StatusErr => "[ERR]",
        StatusNone => "[--]"
    }

fn statusEmoji(s: SyncStatus): String =
    match s {
        StatusOk => "✓",
        StatusWarn => "⚠",
        StatusErr => "✗",
        StatusNone => "-"
    }

// =============================================================================
// Shell helpers
// =============================================================================

fn hasCommand(cmd: String): Bool with {Process} = {
    let result = Process.exec("command -v " + cmd + " 2>/dev/null || true")
    String.length(String.trim(result)) > 0
}

fn execQuiet(cmd: String): String with {Process} =
    String.trim(Process.exec(cmd + " 2>/dev/null || true"))

fn homeDir(): String with {Process} =
    match Process.env("HOME") {
        Some(h) => h,
        None => "/tmp"
    }

// String comparison helpers (workaround for Lux C backend bug with == on strings)
fn isYes(s: String): Bool = String.contains(s, "yes")
fn isNo(s: String): Bool = String.contains(s, "no")
fn isActive(s: String): Bool = String.contains(s, "active")

fn graphoDir(): String with {Process} =
    homeDir() + "/.config/grapho"

fn graphoConfig(): String with {Process} =
    graphoDir() + "/grapho.toml"

// =============================================================================
// Initialization detection
// =============================================================================

fn isInitialized(): Bool with {Process} = {
    let result = execQuiet("test -f " + graphoConfig() + " && echo yes || echo no")
    result |> isYes
}

fn ensureDir(path: String): Unit with {Process} = {
    let ignore = Process.exec("mkdir -p " + path)
    ()
}

fn stateDb(): String with {Process} =
    graphoDir() + "/state.db"

// =============================================================================
// SQLite state tracking
// =============================================================================

fn initStateDb(): Unit with {Process} = {
    let db = stateDb()
    let schema = "CREATE TABLE IF NOT EXISTS events (id INTEGER PRIMARY KEY, timestamp TEXT, type TEXT, message TEXT); CREATE TABLE IF NOT EXISTS backups (id INTEGER PRIMARY KEY, snapshot_id TEXT, timestamp TEXT, size_bytes INTEGER, file_count INTEGER, status TEXT); CREATE TABLE IF NOT EXISTS devices (device_id TEXT PRIMARY KEY, name TEXT, last_seen TEXT, status TEXT);"
    let ignore = Process.exec("sqlite3 " + db + " \"" + schema + "\" 2>/dev/null || true")
    ()
}

fn logEvent(eventType: String, message: String): Unit with {Process} = {
    let db = stateDb()
    let timestamp = execQuiet("date -Iseconds")
    let sql = "INSERT INTO events (timestamp, type, message) VALUES ('" + timestamp + "', '" + eventType + "', '" + message + "');"
    let ignore = Process.exec("sqlite3 " + db + " \"" + sql + "\" 2>/dev/null || true")
    ()
}

fn getRecentEvents(limit: String): String with {Process} = {
    let db = stateDb()
    execQuiet("sqlite3 -separator ' | ' " + db + " \"SELECT timestamp, type, message FROM events ORDER BY id DESC LIMIT " + limit + ";\" 2>/dev/null")
}

// =============================================================================
// Directory structure
// =============================================================================

fn createDirectories(): Unit with {Process, Console} = {
    let base = graphoDir()
    Console.print("Creating directory structure...")
    ensureDir(base)
    ensureDir(base + "/config-repo")
    ensureDir(base + "/syncthing/config")
    ensureDir(base + "/syncthing/db")
    ensureDir(base + "/sync/notes")
    ensureDir(base + "/sync/documents")
    ensureDir(base + "/sync/dotfiles")
    ensureDir(base + "/restic/cache")
    ensureDir(base + "/server")
    Console.print(statusIcon(StatusOk) + " Directories created")
}

// =============================================================================
// Welcome flow
// =============================================================================

fn showWelcome(): Unit with {Console, Process} = {
    Console.print("")
    Console.print("  Welcome to grapho")
    Console.print("")
    Console.print("  grapho manages your data across all your devices:")
    Console.print("")
    Console.print("  * Config   - Your machine setup, restored anywhere")
    Console.print("  * Sync     - Notes & docs synced across devices")
    Console.print("  * Backup   - Snapshots you can restore anytime")
    Console.print("  * Server   - Large files on your server")
    Console.print("")
    Console.print("  To get started, run:")
    Console.print("")
    Console.print("    grapho setup          # Interactive setup wizard")
    Console.print("    grapho init <url>     # Initialize from existing config repo")
    Console.print("")
    Console.print("  For more info: grapho help")
    Console.print("")
}

// =============================================================================
// Setup wizard
// =============================================================================

fn doSetup(): Unit with {Console, Process} = {
    Console.print("")
    Console.print("grapho setup wizard")
    Console.print("====================")
    Console.print("")

    // Create directories
    createDirectories()
    Console.print("")

    // Create initial config
    Console.print("Creating initial configuration...")
    let configContent = "[grapho]\nversion = 1\ndevice_name = \"" + execQuiet("hostname") + "\"\n\n[sync]\ngui_port = 8385\nsync_port = 22001\nfolders = [\"notes\", \"documents\", \"dotfiles\"]\n\n[backup]\nschedule = \"hourly\"\n\n[services]\n"

    let writeCmd = "cat > " + graphoConfig() + " << 'GRAPHO_EOF'\n" + configContent + "GRAPHO_EOF"
    let ignore = Process.exec(writeCmd)
    Console.print(statusIcon(StatusOk) + " Configuration created at " + graphoConfig())
    Console.print("")

    // Generate age key if missing
    let hasAgeKey = execQuiet("test -f " + graphoDir() + "/age-key.txt && echo yes || echo no")
    if hasAgeKey |> isYes then
        Console.print(statusIcon(StatusOk) + " Age encryption key exists")
    else {
        Console.print("Generating age encryption key...")
        let ignore = Process.exec("age-keygen -o " + graphoDir() + "/age-key.txt 2>&1 || true")
        Console.print(statusIcon(StatusOk) + " Age key generated")
    }
    Console.print("")

    // Initialize state database
    if hasCommand("sqlite3") then {
        Console.print("Initializing state database...")
        initStateDb()
        logEvent("setup", "Grapho initialized")
        Console.print(statusIcon(StatusOk) + " State database created at " + stateDb())
    } else {
        Console.print(statusIcon(StatusWarn) + " sqlite3 not found - state tracking disabled")
    }
    Console.print("")

    // Initialize Syncthing automatically
    if hasCommand("syncthing") then {
        Console.print("Setting up Syncthing...")
        let hasConfig = execQuiet("test -f " + graphoDir() + "/syncthing/config/config.xml && echo yes || echo no")
        if hasConfig |> isNo then {
            let ignore = Process.exec("syncthing generate --home=" + graphoDir() + "/syncthing/config --no-default-folder --gui-listen=127.0.0.1:8385 2>&1")
            let ignore2 = Process.exec("sed -i 's/<listenAddress>default</<listenAddress>tcp:\\/\\/0.0.0.0:22001</' " + graphoDir() + "/syncthing/config/config.xml 2>/dev/null || true")
            Console.print(statusIcon(StatusOk) + " Syncthing configured (GUI: 8385, Sync: 22001)")
        } else {
            Console.print(statusIcon(StatusOk) + " Syncthing already configured")
        }
    } else {
        Console.print(statusIcon(StatusWarn) + " Syncthing not found")
        Console.print("    Enable in NixOS: services.grapho.enable = true;")
    }

    // Check for restic
    if hasCommand("restic") then {
        Console.print(statusIcon(StatusOk) + " Restic available for backups")
    } else {
        Console.print(statusIcon(StatusWarn) + " Restic not found")
        Console.print("    Enable in NixOS: services.grapho.enable = true;")
    }

    Console.print("")
    Console.print("Setup complete!")
    Console.print("")
    Console.print("Your grapho data is stored in: " + graphoDir())
    Console.print("")
    Console.print("Next steps:")
    Console.print("  grapho status      # Check system health")
    Console.print("  grapho sync setup  # Configure device pairing")
    Console.print("  grapho backup init # Configure backups")
    Console.print("")
}

// =============================================================================
// Init from repo
// =============================================================================

fn doInit(repoUrl: String): Unit with {Console, Process} = {
    if String.length(repoUrl) == 0 then {
        Console.print("Usage: grapho init <repo-url>")
        Console.print("")
        Console.print("Clone a grapho config repository to set up this machine.")
        Console.print("")
        Console.print("Example:")
        Console.print("  grapho init https://github.com/user/grapho-config")
        Console.print("  grapho init git@github.com:user/grapho-config.git")
    } else {
        Console.print("Initializing from " + repoUrl)
        Console.print("")

        // Create base directory
        createDirectories()

        // Clone repo
        Console.print("Cloning config repository...")
        let cloneResult = Process.exec("git clone " + repoUrl + " " + graphoDir() + "/config-repo 2>&1")
        if String.contains(cloneResult, "fatal") then {
            Console.print(statusIcon(StatusErr) + " Failed to clone repository")
            Console.print("    " + cloneResult)
        } else {
            Console.print(statusIcon(StatusOk) + " Repository cloned")

            // Check for flake.nix
            let hasFlake = execQuiet("test -f " + graphoDir() + "/config-repo/flake.nix && echo yes || echo no")
            if hasFlake |> isYes then {
                Console.print(statusIcon(StatusOk) + " Found flake.nix")
                Console.print("")
                Console.print("To apply the NixOS configuration:")
                Console.print("  cd " + graphoDir() + "/config-repo")
                Console.print("  sudo nixos-rebuild switch --flake .#<hostname>")
            } else {
                Console.print(statusIcon(StatusWarn) + " No flake.nix found")
                Console.print("    This repo may not be a NixOS configuration")
            }
        }
        Console.print("")
    }
}

// =============================================================================
// Syncthing helpers (isolated grapho instance)
// =============================================================================

fn graphoSyncthingRunning(): Bool with {Process} = {
    // Check if Syncthing is running on grapho port (8385)
    let result = execQuiet("curl -s http://127.0.0.1:8385/rest/system/status 2>/dev/null | head -c 1")
    String.length(result) > 0
}

fn getSyncthingDeviceId(): String with {Process} = {
    execQuiet("syncthing cli --home=" + graphoDir() + "/syncthing/config show system 2>/dev/null | grep -o 'myID.*' | cut -d'\"' -f3")
}

fn getSyncFolderCount(): String with {Process} = {
    execQuiet("syncthing cli --home=" + graphoDir() + "/syncthing/config show config 2>/dev/null | jq -r '.folders | length' 2>/dev/null || echo 0")
}

fn getSyncDeviceCount(): String with {Process} = {
    execQuiet("syncthing cli --home=" + graphoDir() + "/syncthing/config show config 2>/dev/null | jq -r '.devices | length' 2>/dev/null || echo 0")
}

// =============================================================================
// Sync commands
// =============================================================================

fn doSyncStatus(): Unit with {Console, Process} = {
    Console.print("grapho sync status")
    Console.print("")

    if hasCommand("syncthing") then {
        if graphoSyncthingRunning() then {
            let folders = getSyncFolderCount()
            let devices = getSyncDeviceCount()
            Console.print(statusIcon(StatusOk) + " Syncthing running on port 8385")
            Console.print("    Folders: " + folders)
            Console.print("    Devices: " + devices)
            Console.print("")
            Console.print("    Web UI: http://127.0.0.1:8385")
        } else {
            Console.print(statusIcon(StatusWarn) + " Grapho Syncthing not running")
            Console.print("")
            Console.print("    Start with: systemctl --user start syncthing-grapho")
            Console.print("    Or: syncthing serve --home=" + graphoDir() + "/syncthing/config --gui-address=127.0.0.1:8385")
        }
    } else {
        Console.print(statusIcon(StatusErr) + " Syncthing not installed")
        Console.print("    Install via nix or NixOS config")
    }
}

fn doSyncSetup(): Unit with {Console, Process} = {
    Console.print("grapho sync setup")
    Console.print("")

    if hasCommand("syncthing") == false then {
        Console.print(statusIcon(StatusErr) + " Syncthing not installed")
        Console.print("    Add to your NixOS config: services.grapho.enable = true;")
    } else {
        // Initialize Syncthing config if needed
        let hasConfig = execQuiet("test -f " + graphoDir() + "/syncthing/config/config.xml && echo yes || echo no")
        if hasConfig |> isNo then {
            Console.print("Initializing Syncthing for grapho...")
            let ignore = Process.exec("syncthing generate --home=" + graphoDir() + "/syncthing/config --no-default-folder --gui-listen=127.0.0.1:8385 2>&1")
            Console.print(statusIcon(StatusOk) + " Syncthing config created")

            // Update listen address in config
            let ignore2 = Process.exec("sed -i 's/<listenAddress>default</<listenAddress>tcp:\\/\\/0.0.0.0:22001</' " + graphoDir() + "/syncthing/config/config.xml 2>/dev/null || true")
            Console.print(statusIcon(StatusOk) + " Configured ports (GUI: 8385, Sync: 22001)")
        } else {
            Console.print(statusIcon(StatusOk) + " Syncthing already configured")
        }

        // Start Syncthing if not running
        if graphoSyncthingRunning() == false then {
            Console.print("")
            Console.print("Starting Syncthing...")
            let ignore = Process.exec("syncthing serve --home=" + graphoDir() + "/syncthing/config --no-browser --gui-address=127.0.0.1:8385 &")
            // Wait a moment for it to start
            let ignore2 = Process.exec("sleep 2")
        } else {
            Console.print(statusIcon(StatusOk) + " Syncthing already running")
        }

        // Get device ID
        Console.print("")
        let deviceId = execQuiet("syncthing cli --home=" + graphoDir() + "/syncthing/config show system 2>/dev/null | grep myID | cut -d'\"' -f4")
        if String.length(deviceId) > 10 then {
            Console.print("Your device ID:")
            Console.print("  " + deviceId)
            Console.print("")
            Console.print("Share this ID with other devices to pair.")
            Console.print("Web UI: http://127.0.0.1:8385")
            logEvent("sync", "Syncthing setup complete")
        } else {
            Console.print(statusIcon(StatusWarn) + " Could not get device ID")
            Console.print("    Syncthing may still be starting. Try: grapho sync status")
        }
    }
}

fn doSync(): Unit with {Console, Process} = {
    Console.print("Syncing...")

    if graphoSyncthingRunning() then {
        Console.print("-> Triggering Syncthing rescan")
        let ignore = Process.exec("syncthing cli --home=" + graphoDir() + "/syncthing/config scan 2>/dev/null || true")
        Console.print(statusIcon(StatusOk) + " Sync triggered")
        logEvent("sync", "Manual sync triggered")
    } else {
        Console.print(statusIcon(StatusWarn) + " Syncthing not running")
        Console.print("    Start with: grapho sync setup")
    }
    Console.print("")
}

// =============================================================================
// Backup commands
// =============================================================================

fn doBackupInit(repoArg: String): Unit with {Console, Process} = {
    Console.print("grapho backup init")
    Console.print("")

    if hasCommand("restic") == false then {
        Console.print(statusIcon(StatusErr) + " Restic not installed")
        Console.print("    Add to your NixOS config: services.grapho.enable = true;")
    } else {
        if String.length(repoArg) == 0 then {
            Console.print("Usage: grapho backup init <repository>")
            Console.print("")
            Console.print("Examples:")
            Console.print("  grapho backup init /mnt/backup/grapho")
            Console.print("  grapho backup init sftp:server:/backups/grapho")
            Console.print("  grapho backup init b2:bucket-name:grapho")
            Console.print("")
            Console.print("This will initialize a new restic repository and save the config.")
        } else {
            Console.print("Initializing backup repository: " + repoArg)
            Console.print("")

            // Generate a password file if it doesn't exist
            let passwordFile = graphoDir() + "/restic/password"
            let hasPassword = execQuiet("test -f " + passwordFile + " && echo yes || echo no")
            if hasPassword |> isNo then {
                Console.print("Generating backup password...")
                let ignore = Process.exec("head -c 32 /dev/urandom | base64 > " + passwordFile + " && chmod 600 " + passwordFile)
                Console.print(statusIcon(StatusOk) + " Password saved to " + passwordFile)
            } else {
                Console.print(statusIcon(StatusOk) + " Using existing password from " + passwordFile)
            }
            Console.print("")

            // Initialize restic repository
            Console.print("Initializing restic repository...")
            let initResult = Process.exec("restic -r " + repoArg + " --password-file " + passwordFile + " init 2>&1")

            if String.contains(initResult, "created restic repository") then {
                Console.print(statusIcon(StatusOk) + " Repository initialized")
                Console.print("")

                // Save repository path to a simple file
                let repoFile = graphoDir() + "/restic/repository"
                let ignore = Process.exec("echo '" + repoArg + "' > " + repoFile)

                Console.print(statusIcon(StatusOk) + " Repository saved to " + repoFile)
                Console.print("")
                Console.print("Backup configured! Files created:")
                Console.print("  " + passwordFile + " (keep this safe!)")
                Console.print("  " + repoFile)
                Console.print("")
                Console.print("To run a backup: grapho backup")
                logEvent("backup", "Repository initialized: " + repoArg)
            } else if String.contains(initResult, "already initialized") then {
                Console.print(statusIcon(StatusOk) + " Repository already initialized")
            } else {
                Console.print(statusIcon(StatusErr) + " Failed to initialize repository")
                Console.print(initResult)
            }
        }
    }
}

fn getBackupRepo(): String with {Process} = {
    let repoFile = graphoDir() + "/restic/repository"
    execQuiet("cat " + repoFile + " 2>/dev/null")
}

fn getBackupPassword(): String with {Process} = {
    graphoDir() + "/restic/password"
}

fn doBackupList(): Unit with {Console, Process} = {
    Console.print("grapho backup list")
    Console.print("")

    if hasCommand("restic") == false then {
        Console.print(statusIcon(StatusErr) + " Restic not installed")
    } else {
        let repo = getBackupRepo()
        if String.length(repo) == 0 then {
            Console.print(statusIcon(StatusWarn) + " No backup repository configured")
            Console.print("    Run: grapho backup init <repository>")
        } else {
            Console.print("Repository: " + repo)
            Console.print("")
            let snapshots = Process.exec("restic -r " + repo + " --password-file " + getBackupPassword() + " snapshots 2>&1")
            Console.print(snapshots)
        }
    }
}

fn doBackup(): Unit with {Console, Process} = {
    Console.print("Running backup...")
    Console.print("")

    if hasCommand("restic") == false then {
        Console.print(statusIcon(StatusErr) + " Restic not installed")
    } else {
        let repo = getBackupRepo()
        if String.length(repo) == 0 then {
            Console.print(statusIcon(StatusWarn) + " No backup repository configured")
            Console.print("    Run: grapho backup init <repository>")
        } else {
            Console.print("Repository: " + repo)
            Console.print("Backing up: " + graphoDir() + "/sync")
            Console.print("")

            let backupResult = Process.exec("restic -r " + repo + " --password-file " + getBackupPassword() + " backup " + graphoDir() + "/sync 2>&1")
            Console.print(backupResult)

            if String.contains(backupResult, "snapshot") then {
                Console.print("")
                Console.print(statusIcon(StatusOk) + " Backup complete")
                logEvent("backup", "Backup completed successfully")
            } else {
                Console.print("")
                Console.print(statusIcon(StatusErr) + " Backup may have failed")
                logEvent("backup", "Backup failed or incomplete")
            }
        }
    }
    Console.print("")
}

// =============================================================================
// Server commands
// =============================================================================

fn doServerStatus(): Unit with {Console, Process} = {
    Console.print("grapho server status")
    Console.print("")

    let serverDir = graphoDir() + "/server"
    let isMounted = execQuiet("mountpoint -q " + serverDir + " && echo yes || echo no")

    if isMounted |> isYes then {
        let usage = execQuiet("df -h " + serverDir + " | tail -1 | tr -s ' ' | cut -d' ' -f3,2,5 | tr ' ' '/'")
        Console.print(statusIcon(StatusOk) + " Server mounted at " + serverDir)
        Console.print("    Usage: " + usage)
        Console.print("")
        Console.print("Commands:")
        Console.print("    grapho server unmount    Unmount server")
        Console.print("    grapho server ls         List server contents")
    } else {
        Console.print(statusIcon(StatusNone) + " Server not mounted")
        Console.print("")
        Console.print("To configure server access, add to " + graphoConfig() + ":")
        Console.print("")
        Console.print("    [server]")
        Console.print("    type = \"syncthing\"    # or \"nfs\", \"sshfs\"")
        Console.print("    host = \"server.local\"")
        Console.print("    path = \"/data/shared\"")
        Console.print("")
        Console.print("Then run: grapho server mount")
    }
}

fn doServerSetup(): Unit with {Console, Process} = {
    Console.print("grapho server setup")
    Console.print("")
    Console.print("Server data (Type 4) provides access to large files on a central server.")
    Console.print("Unlike synced data, server files are accessed on-demand, not copied locally.")
    Console.print("")
    Console.print("Options:")
    Console.print("")
    Console.print("1. Syncthing (selective sync)")
    Console.print("   - Use .stignore to exclude large folders")
    Console.print("   - Full read/write access")
    Console.print("   - Works offline for synced folders")
    Console.print("")
    Console.print("2. NFS mount")
    Console.print("   - Direct network filesystem access")
    Console.print("   - Requires NFS server on remote machine")
    Console.print("   - Automounts on access")
    Console.print("")
    Console.print("3. SSHFS mount")
    Console.print("   - Mount via SSH (no server setup needed)")
    Console.print("   - Requires SSH access to remote machine")
    Console.print("")
    Console.print("Configure in " + graphoConfig() + " under [server] section.")
}

fn doServerMount(): Unit with {Console, Process} = {
    Console.print("Mounting server...")

    let serverDir = graphoDir() + "/server"
    let isMounted = execQuiet("mountpoint -q " + serverDir + " && echo yes || echo no")

    if isMounted |> isYes then {
        Console.print(statusIcon(StatusOk) + " Already mounted at " + serverDir)
    } else {
        // Check for NFS/SSHFS configuration in grapho.toml
        // For now, show instructions
        Console.print(statusIcon(StatusWarn) + " Manual mount required")
        Console.print("")
        Console.print("For SSHFS:")
        Console.print("    sshfs user@server:/path " + serverDir)
        Console.print("")
        Console.print("For NFS (configure in NixOS):")
        Console.print("    services.grapho.server.enable = true;")
        Console.print("    services.grapho.server.type = \"nfs\";")
        Console.print("    services.grapho.server.host = \"server.local\";")
        Console.print("    services.grapho.server.remotePath = \"/data/shared\";")
    }
}

fn doServerUnmount(): Unit with {Console, Process} = {
    Console.print("Unmounting server...")

    let serverDir = graphoDir() + "/server"
    let isMounted = execQuiet("mountpoint -q " + serverDir + " && echo yes || echo no")

    if isMounted |> isYes then {
        let result = Process.exec("fusermount -u " + serverDir + " 2>&1 || umount " + serverDir + " 2>&1")
        let stillMounted = execQuiet("mountpoint -q " + serverDir + " && echo yes || echo no")
        if stillMounted |> isNo then
            Console.print(statusIcon(StatusOk) + " Unmounted " + serverDir)
        else {
            Console.print(statusIcon(StatusErr) + " Failed to unmount")
            Console.print("    Try: sudo umount " + serverDir)
        }
    } else {
        Console.print(statusIcon(StatusNone) + " Not mounted")
    }
}

fn doServerLs(): Unit with {Console, Process} = {
    let serverDir = graphoDir() + "/server"
    let isMounted = execQuiet("mountpoint -q " + serverDir + " && echo yes || echo no")

    if isMounted |> isYes then {
        Console.print("Contents of " + serverDir + ":")
        Console.print("")
        let listing = Process.exec("ls -la " + serverDir + " 2>&1")
        Console.print(listing)
    } else {
        Console.print(statusIcon(StatusNone) + " Server not mounted")
        Console.print("    Run: grapho server mount")
    }
}

// =============================================================================
// One-liner health check
// =============================================================================

fn showHealthCheck(): Unit with {Console, Process} = {
    // Check if initialized
    if isInitialized() == false then {
        showWelcome()
    } else {
        let configOk = true
        let syncOk = graphoSyncthingRunning()
        let backupOk = execQuiet("systemctl is-active grapho-backup.timer 2>/dev/null || systemctl is-active restic-backup.timer 2>/dev/null") |> isActive

        let folders = if syncOk then getSyncFolderCount() else "0"
        let devices = if syncOk then getSyncDeviceCount() else "0"

        // Determine issues
        if syncOk == false || backupOk == false then {
            if syncOk == false && backupOk == false then {
                Console.print(statusEmoji(StatusWarn) + " Warnings")
                Console.print("  " + statusIcon(StatusWarn) + " sync: not running -> systemctl --user start syncthing-grapho")
                Console.print("  " + statusIcon(StatusWarn) + " backup: timer inactive -> check grapho backup init")
            } else if syncOk == false then {
                Console.print(statusEmoji(StatusWarn) + " Sync not running")
                Console.print("  " + statusIcon(StatusWarn) + " sync: not running -> systemctl --user start syncthing-grapho")
            } else {
                Console.print(statusEmoji(StatusWarn) + " Backup timer inactive")
                Console.print("  " + statusIcon(StatusWarn) + " backup: timer inactive -> check grapho backup init")
            }
        } else {
            Console.print(statusEmoji(StatusOk) + " All systems healthy (" + folders + " folders, " + devices + " devices, backup active)")
        }
    }
}

// =============================================================================
// Status dashboard
// =============================================================================

fn showStatus(): Unit with {Console, Process} = {
    Console.print("grapho status")
    Console.print("")

    if isInitialized() == false then {
        Console.print(statusIcon(StatusNone) + " grapho not initialized")
        Console.print("    Run: grapho setup")
        Console.print("")
    } else {
        // Config
        let hasRepo = execQuiet("test -d " + graphoDir() + "/config-repo/.git && echo yes || echo no")
        if hasRepo |> isYes then {
            let repoRemote = execQuiet("cd " + graphoDir() + "/config-repo && git remote get-url origin 2>/dev/null || echo local")
            Console.print(statusIcon(StatusOk) + " config: " + repoRemote)
        } else {
            Console.print(statusIcon(StatusNone) + " config: no repo linked")
            Console.print("    Run: grapho init <repo-url>")
        }

        // Sync
        if graphoSyncthingRunning() then {
            let folders = getSyncFolderCount()
            let devices = getSyncDeviceCount()
            Console.print(statusIcon(StatusOk) + " sync: " + folders + " folders, " + devices + " devices")
        } else {
            Console.print(statusIcon(StatusWarn) + " sync: not running")
            Console.print("    Run: grapho sync setup")
        }

        // Backup
        let timerActive = execQuiet("systemctl is-active grapho-backup.timer 2>/dev/null || systemctl is-active restic-backup.timer 2>/dev/null")
        if timerActive |> isActive then {
            Console.print(statusIcon(StatusOk) + " backup: timer active")
        } else {
            Console.print(statusIcon(StatusWarn) + " backup: timer inactive")
            Console.print("    Run: grapho backup init")
        }

        // Server
        let serverDir = graphoDir() + "/server"
        let isMounted = execQuiet("mountpoint -q " + serverDir + " && echo yes || echo no")
        if isMounted |> isYes then {
            Console.print(statusIcon(StatusOk) + " server: mounted")
        } else {
            Console.print(statusIcon(StatusNone) + " server: not configured")
        }
    }
    Console.print("")
}

// =============================================================================
// Doctor command
// =============================================================================

fn showDoctor(): Unit with {Console, Process} = {
    Console.print("grapho doctor")
    Console.print("")

    // Check nix
    if hasCommand("nix") then {
        let nixVer = execQuiet("nix --version")
        Console.print(statusIcon(StatusOk) + " nix: " + nixVer)
    } else {
        Console.print(statusIcon(StatusErr) + " nix: not found")
        Console.print("    Install: https://nixos.org/download")
    }

    // Check git
    if hasCommand("git") then {
        let gitVer = execQuiet("git --version | cut -d' ' -f3")
        Console.print(statusIcon(StatusOk) + " git: " + gitVer)
    } else {
        Console.print(statusIcon(StatusErr) + " git: not found")
    }

    // Check syncthing
    if hasCommand("syncthing") then {
        if graphoSyncthingRunning() then {
            Console.print(statusIcon(StatusOk) + " syncthing: running on port 8385")
        } else {
            Console.print(statusIcon(StatusWarn) + " syncthing: installed but not running")
            Console.print("    Fix: grapho sync setup")
        }
    } else {
        Console.print(statusIcon(StatusErr) + " syncthing: not installed")
    }

    // Check restic
    if hasCommand("restic") then {
        Console.print(statusIcon(StatusOk) + " restic: installed")
    } else {
        Console.print(statusIcon(StatusErr) + " restic: not installed")
    }

    // Check age
    if hasCommand("age") then {
        let hasKey = execQuiet("test -f " + graphoDir() + "/age-key.txt && echo yes || echo no")
        if hasKey |> isYes then {
            Console.print(statusIcon(StatusOk) + " age: key exists")
        } else {
            Console.print(statusIcon(StatusWarn) + " age: no key at " + graphoDir() + "/age-key.txt")
            Console.print("    Fix: grapho setup")
        }
    } else {
        Console.print(statusIcon(StatusErr) + " age: not installed")
    }

    // Directory structure
    Console.print("")
    Console.print("Directory structure:")
    let hasGraphoDir = execQuiet("test -d " + graphoDir() + " && echo yes || echo no")
    if hasGraphoDir |> isYes then {
        Console.print(statusIcon(StatusOk) + " " + graphoDir())
        checkDir("config-repo")
        checkDir("syncthing")
        checkDir("sync")
        checkDir("restic")
        checkDir("server")
    } else {
        Console.print(statusIcon(StatusErr) + " " + graphoDir() + " does not exist")
        Console.print("    Fix: grapho setup")
    }

    Console.print("")
}

fn checkDir(dir: String): Unit with {Console, Process} = {
    let exists = execQuiet("test -d " + graphoDir() + "/" + dir + " && echo yes || echo no")
    if exists |> isYes then
        Console.print("    " + statusIcon(StatusOk) + " " + dir + "/")
    else
        Console.print("    " + statusIcon(StatusNone) + " " + dir + "/ (missing)")
}

// =============================================================================
// Dashboard command
// =============================================================================

fn doDashboard(): Unit with {Console, Process} = {
    Console.print("grapho dashboard")
    Console.print("")

    let dashboardFile = graphoDir() + "/dashboard.html"

    // Gather status
    let deviceName = execQuiet("hostname")
    let syncRunning = if graphoSyncthingRunning() then "Running" else "Stopped"
    let syncClass = if graphoSyncthingRunning() then "ok" else "warn"
    let folders = if graphoSyncthingRunning() then getSyncFolderCount() else "0"
    let devices = if graphoSyncthingRunning() then getSyncDeviceCount() else "0"

    let backupRepo = getBackupRepo()
    let backupStatus = if String.length(backupRepo) > 0 then "Configured" else "Not configured"
    let backupClass = if String.length(backupRepo) > 0 then "ok" else "none"

    let serverDir = graphoDir() + "/server"
    let serverMounted = execQuiet("mountpoint -q " + serverDir + " && echo yes || echo no")
    let serverStatus = if serverMounted |> isYes then "Mounted" else "Not mounted"
    let serverClass = if serverMounted |> isYes then "ok" else "none"

    // Generate HTML via shell script to avoid Lux string issues
    let genScript = graphoDir() + "/gen-dashboard.sh"
    let ignore = Process.exec("printf '%s' '#!/bin/sh' > " + genScript)
    let ignore2 = Process.exec("chmod +x " + genScript)

    // Write dashboard using printf to avoid issues
    let ignore3 = Process.exec("printf '<!DOCTYPE html><html><head><title>grapho</title></head><body style=\"background:rgb(30,30,50);color:white;font-family:sans-serif;padding:20px\"><h1>grapho</h1>' > " + dashboardFile)
    let ignore4 = Process.exec("printf '<div style=\"background:rgb(40,40,70);padding:15px;margin:10px 0;border-radius:8px\"><b>Device:</b> " + deviceName + "</div>' >> " + dashboardFile)
    let ignore5 = Process.exec("printf '<div style=\"background:rgb(40,40,70);padding:15px;margin:10px 0;border-radius:8px\"><b>Sync:</b> <span style=\"color:" + (if graphoSyncthingRunning() then "lightgreen" else "orange") + "\">" + syncRunning + "</span> (" + folders + " folders, " + devices + " devices)</div>' >> " + dashboardFile)
    let ignore6 = Process.exec("printf '<div style=\"background:rgb(40,40,70);padding:15px;margin:10px 0;border-radius:8px\"><b>Backup:</b> " + backupStatus + "</div>' >> " + dashboardFile)
    let ignore7 = Process.exec("printf '<div style=\"background:rgb(40,40,70);padding:15px;margin:10px 0;border-radius:8px\"><b>Server:</b> " + serverStatus + "</div>' >> " + dashboardFile)
    let ignore8 = Process.exec("printf '</body></html>' >> " + dashboardFile)

    Console.print(statusIcon(StatusOk) + " Dashboard generated: " + dashboardFile)
    Console.print("")
    Console.print("Open in browser:")
    Console.print("    xdg-open " + dashboardFile)
    Console.print("")
    Console.print("Or serve it:")
    Console.print("    python -m http.server 8386 -d " + graphoDir())
}

// =============================================================================
// Export/Import commands
// =============================================================================

fn doExport(): Unit with {Console, Process} = {
    Console.print("grapho export")
    Console.print("")

    let timestamp = execQuiet("date +%Y-%m-%d")
    let exportFile = "grapho-export-" + timestamp + ".tar.zst"
    let exportPath = execQuiet("pwd") + "/" + exportFile

    Console.print("Exporting grapho data to " + exportFile)
    Console.print("")

    // Create encrypted archive
    Console.print("Archiving...")
    let tarResult = Process.exec("tar -C " + graphoDir() + " -cf - . 2>/dev/null | zstd -q > " + exportPath + " 2>&1")

    let fileExists = execQuiet("test -f " + exportPath + " && echo yes || echo no")
    if fileExists |> isYes then {
        let fileSize = execQuiet("du -h " + exportPath + " | cut -f1")
        Console.print(statusIcon(StatusOk) + " Export created: " + exportPath)
        Console.print("    Size: " + fileSize)
        Console.print("")
        Console.print("To restore on another machine:")
        Console.print("    grapho import " + exportFile)
        logEvent("export", "Exported to " + exportFile)
    } else {
        Console.print(statusIcon(StatusErr) + " Export failed")
        Console.print("    Make sure zstd is installed")
    }
}

fn doImport(archivePath: String): Unit with {Console, Process} = {
    Console.print("grapho import")
    Console.print("")

    if String.length(archivePath) == 0 then {
        Console.print("Usage: grapho import <archive.tar.zst>")
        Console.print("")
        Console.print("Restore grapho data from an export archive.")
    } else {
        let fileExists = execQuiet("test -f " + archivePath + " && echo yes || echo no")
        if fileExists |> isNo then {
            Console.print(statusIcon(StatusErr) + " File not found: " + archivePath)
        } else {
            Console.print("Importing from " + archivePath)
            Console.print("")

            // Check if grapho dir already exists
            let hasGrapho = execQuiet("test -d " + graphoDir() + " && echo yes || echo no")
            if hasGrapho |> isYes then {
                Console.print(statusIcon(StatusWarn) + " Existing grapho data found at " + graphoDir())
                Console.print("    Backing up to " + graphoDir() + ".bak")
                let ignore = Process.exec("mv " + graphoDir() + " " + graphoDir() + ".bak 2>&1")
            } else ()

            // Create directory and extract
            Console.print("Extracting...")
            let ignore = Process.exec("mkdir -p " + graphoDir())
            let extractResult = Process.exec("zstd -d < " + archivePath + " | tar -C " + graphoDir() + " -xf - 2>&1")

            let configExists = execQuiet("test -f " + graphoConfig() + " && echo yes || echo no")
            if configExists |> isYes then {
                Console.print(statusIcon(StatusOk) + " Import complete")
                Console.print("")
                Console.print("Restored to: " + graphoDir())
                Console.print("")
                Console.print("Next steps:")
                Console.print("    grapho status    # Check system health")
                Console.print("    grapho sync setup  # Re-pair devices")
                logEvent("import", "Imported from " + archivePath)
            } else {
                Console.print(statusIcon(StatusErr) + " Import may have failed")
                Console.print("    Check if archive is valid")
            }
        }
    }
}

// =============================================================================
// History command
// =============================================================================

fn showHistory(): Unit with {Console, Process} = {
    Console.print("grapho history")
    Console.print("")

    if hasCommand("sqlite3") then {
        let dbExists = execQuiet("test -f " + stateDb() + " && echo yes || echo no")
        if dbExists |> isYes then {
            let events = getRecentEvents("20")
            if String.length(events) > 0 then {
                Console.print("Recent events:")
                Console.print("")
                Console.print(events)
            } else {
                Console.print("No events recorded yet.")
            }
        } else {
            Console.print("State database not found.")
            Console.print("    Run: grapho setup")
        }
    } else {
        Console.print(statusIcon(StatusErr) + " sqlite3 not installed")
        Console.print("    History tracking requires sqlite3")
    }
    Console.print("")
}

// =============================================================================
// Help
// =============================================================================

fn showHelp(): Unit with {Console, Process} = {
    Console.print("grapho - Personal Data Infrastructure")
    Console.print("")
    Console.print("Usage:")
    Console.print("  grapho                    Health check (or welcome if new)")
    Console.print("  grapho init <repo-url>    Initialize from config repo")
    Console.print("  grapho setup              Interactive setup wizard")
    Console.print("")
    Console.print("Sync (Type 2 - Real-time bidirectional):")
    Console.print("  grapho sync               Trigger sync")
    Console.print("  grapho sync status        Show sync status")
    Console.print("  grapho sync setup         Configure Syncthing")
    Console.print("")
    Console.print("Backup (Type 3 - Periodic snapshots):")
    Console.print("  grapho backup             Run backup now")
    Console.print("  grapho backup list        List snapshots")
    Console.print("  grapho backup init <repo> Initialize backup repository")
    Console.print("")
    Console.print("Server (Type 4 - Central storage):")
    Console.print("  grapho server             Show server status")
    Console.print("  grapho server setup       Configure server access")
    Console.print("  grapho server mount       Mount server data")
    Console.print("  grapho server unmount     Unmount server data")
    Console.print("  grapho server ls          List server contents")
    Console.print("")
    Console.print("Export/Import:")
    Console.print("  grapho export             Export all data to archive")
    Console.print("  grapho import <file>      Import from archive")
    Console.print("")
    Console.print("Status:")
    Console.print("  grapho status             Full status dashboard")
    Console.print("  grapho doctor             Diagnose issues")
    Console.print("  grapho history            Show recent events")
    Console.print("  grapho dashboard          Generate HTML status page")
    Console.print("  grapho help               Show this help")
    Console.print("")
    Console.print("Data directory: " + graphoDir())
    Console.print("")
}

// =============================================================================
// Main
// =============================================================================

fn main(): Unit with {Console, Process} = {
    let args = Process.args()
    let cmd = match List.get(args, 1) {
        Some(c) => c,
        None => ""
    }
    let subcmd = match List.get(args, 2) {
        Some(s) => s,
        None => ""
    }
    let arg3 = match List.get(args, 3) {
        Some(a) => a,
        None => ""
    }

    match cmd {
        "" => showHealthCheck(),
        "init" => doInit(subcmd),
        "setup" => doSetup(),
        "sync" => {
            match subcmd {
                "status" => doSyncStatus(),
                "setup" => doSyncSetup(),
                "" => doSync(),
                _ => doSyncStatus()
            }
        },
        "backup" => {
            match subcmd {
                "init" => doBackupInit(arg3),
                "list" => doBackupList(),
                "" => doBackup(),
                _ => doBackup()
            }
        },
        "server" => {
            match subcmd {
                "setup" => doServerSetup(),
                "mount" => doServerMount(),
                "unmount" => doServerUnmount(),
                "ls" => doServerLs(),
                "" => doServerStatus(),
                _ => doServerStatus()
            }
        },
        "export" => doExport(),
        "import" => doImport(subcmd),
        "status" => showStatus(),
        "doctor" => showDoctor(),
        "history" => showHistory(),
        "dashboard" => doDashboard(),
        "help" => showHelp(),
        "-h" => showHelp(),
        "--help" => showHelp(),
        _ => showHelp()
    }
}

let result = run main() with {}