{ config, pkgs, ... }:

{
  ########################################
  # Samba File Sharing
  ########################################
  services.samba = {
    enable = true;
    openFirewall = true;
    # Enable nmbd for NetBIOS name resolution and browsing (legacy Windows/macOS)
    nmbd.enable = true;
    # Enable WSD discovery (Windows) and mDNS/NetBIOS advertisement improvements via wsdd + Avahi.
    # "smb encrypt" set to desired to avoid discovery issues with some clients while still allowing encryption.
    settings = {
      global = {
        workgroup = "WORKGROUP";
        "server string" = "NixFiles";
        "netbios name" = "fileserver";
        security = "user";
        "map to guest" = "bad user";
        "unix extensions" = "no";
        
        # macOS optimizations
        "vfs objects" = "catia fruit streams_xattr";
        "fruit:aapl" = "yes";
        "fruit:metadata" = "stream";
        "fruit:resource" = "stream";
        "fruit:model" = "MacSamba";
        "fruit:advertise_fullsync" = "yes";
        "ea support" = "yes";
        
        # Time Machine support
        "fruit:time machine" = "yes";
        "fruit:time machine max size" = "500G";
        
        # Prefer encryption but do not require it for basic browsing/guest visibility
        "smb encrypt" = "desired";
        
        # Better macOS discovery
        "min protocol" = "SMB2";
        "max protocol" = "SMB3";
        "server role" = "standalone server";
        # Allow Apple extended attributes & full sync advertisement already configured above.
      };
      
      daten = {
        path = "/data/daten";
        browseable = "yes";
        "read only" = "no";
        "valid users" = "danlin";
        "fruit:time machine" = "no";
      };
      
      daten-share = {
        path = "/data/daten/share";
        browseable = "yes";
        "read only" = "no";
        "guest ok" = "yes";  # Gastzugriff erlaubt
        public = "yes";        # Alias für guest ok
        # Removed "valid users" to allow true guest access; danlin can still write via group permissions
        "fruit:time machine" = "no";
      };
      
      timemachine = {
        path = "/data/backup/timemachine";
        browseable = "yes";
        "read only" = "no";
        "valid users" = "danlin";
        "fruit:time machine" = "yes";
        "fruit:time machine max size" = "500G";
      };
    };
  };

  ########################################
  # Network Discovery Services (Avahi + WSD)
  ########################################
  # Avahi for macOS Finder discovery (mDNS) and general _smb._tcp advertising
  services.avahi = {
    enable = true;
    nssmdns4 = true; # Provide .local resolution
    openFirewall = true;
    publish = {
      enable = true;
      userServices = true;
    };
    # Explicit SMB service advertisement for macOS Finder
    extraServiceFiles = {
      smb = ''
        <?xml version="1.0" standalone='no'?>
        <!DOCTYPE service-group SYSTEM "avahi-service.dtd">
        <service-group>
          <name replace-wildcards="yes">%h</name>
          <service>
            <type>_smb._tcp</type>
            <port>445</port>
          </service>
          <service>
            <type>_device-info._tcp</type>
            <port>0</port>
            <txt-record>model=TimeCapsule8,119</txt-record>
          </service>
          <service>
            <type>_adisk._tcp</type>
            <port>9</port>
            <txt-record>sys=waMa=0,adVF=0x100</txt-record>
            <txt-record>dk0=adVN=timemachine,adVF=0x82</txt-record>
          </service>
        </service-group>
      '';
    };
  };

  # Windows network neighborhood discovery via Web Services for Devices (WSD)
  # NixOS does not provide a `services.wsdd` option in this release, so define a systemd unit.
  systemd.services.wsdd = {
    description = "Web Services Discovery daemon for Samba (wsdd)";
    wantedBy = [ "multi-user.target" ];
    after = [ "network-online.target" "samba.service" ];
    wants = [ "network-online.target" ];
    serviceConfig = {
      Type = "simple";
      ExecStart = "${pkgs.wsdd}/bin/wsdd --hostname fileserver --workgroup WORKGROUP --interface ens18";
      Restart = "on-failure";
      RestartSec = 5;
    };
  };

  ########################################
  # Directory Structure
  ########################################
  systemd.tmpfiles.rules = [
    "d /data 0775 root root -"
    "d /data/daten 0775 danlin users -"
    "d /data/daten/share 0775 danlin users -"

    # Gitea (runs as git user inside container, uid 1000)
    "d /data/gitea 0755 root root -"

    # DJ-Struktur
    "d /data/daten/DJing 0775 danlin users -"
    "d /data/daten/DJing/Music 0775 danlin users -"
    "d /data/daten/DJing/Data 0775 danlin users -"
    "d /data/daten/DJing/Inbox 0775 danlin users -"
    
    # Time Machine backup
    "d /data/backup 0775 root root -"
    "d /data/backup/timemachine 0775 danlin users -"
    
    # dj-beets project
    "d /opt/dj-beets 0755 root root -"
  ];

  ########################################
  # Virtualization & Containers
  ########################################
  # Virtualization
  virtualisation.podman.enable = true;
  virtualisation.oci-containers.backend = "podman";
  
  virtualisation.oci-containers.containers.filebrowser = {
    image = "gtstef/filebrowser:stable";
    autoStart = true;
    ports = [ "8080:80" ];
    volumes = [ "/data:/srv" ];
    environment = {
      TZ = "Europe/Berlin";
      FILEBROWSER_ADMIN_PASSWORD = "CHANGE_ME";
    };
  };

  virtualisation.oci-containers.containers.gitea = {
    image = "gitea/gitea:1.25";
    autoStart = true;
    ports = [ "3000:3000" "2222:2222" ];
    volumes = [
      "/data/gitea:/data"
    ];
    environment = {
      USER_UID = "1000";
      USER_GID = "1000";
      TZ = "Europe/Berlin";
      GITEA__server__DOMAIN = "git.home.lindenfelser.de";
      GITEA__server__ROOT_URL = "https://git.home.lindenfelser.de/";
      GITEA__server__SSH_DOMAIN = "git.home.lindenfelser.de";
      GITEA__server__SSH_PORT = "2222";
      GITEA__server__SSH_LISTEN_PORT = "2222";
      GITEA__server__START_SSH_SERVER = "true";
    };
  };

  virtualisation.oci-containers.containers.dj-beets-cli = {
    image = "dj-beets:latest";
    autoStart = false;  # Run manually or via systemd service
    volumes = [
      "/data/daten/DJing:/data/daten/DJing"
      "/opt/dj-beets/config.yaml:/etc/beets/config.yaml:ro"
      "/opt/dj-beets/beatport_token.json:/opt/dj-beets/beatport_token.json"
    ];
    environment = {
      BEETS_CONFIG = "/etc/beets/config.yaml";
    };
    cmd = [ "tail" "-f" "/dev/null" ];  # Keep container alive
  };

  virtualisation.oci-containers.containers.dj-beets-web = {
    image = "dj-beets:latest";
    autoStart = true;
    ports = [ "8337:8337" ];
    volumes = [
      "/data/daten/DJing:/data/daten/DJing"
      "/opt/dj-beets/config.yaml:/etc/beets/config.yaml:ro"
      "/opt/dj-beets/beatport_token.json:/opt/dj-beets/beatport_token.json"
    ];
    environment = {
      BEETS_CONFIG = "/etc/beets/config.yaml";
    };
    cmd = [ "beet" "web" ];
  };

  ########################################
  # Backup Services
  ########################################
  systemd.services.rclone-backup = {
    description = "Backup /data to Google Drive via rclone";
    serviceConfig = {
      Type = "oneshot";
      ExecStart = ''
        ${pkgs.rclone}/bin/rclone sync /data gdrive:backup-daten \
          --fast-list \
          --drive-stop-on-upload-limit \
          --log-file=/var/log/rclone-backup.log \
          --log-level=INFO
      '';
      User = "root";
    };
  };

  systemd.timers.rclone-backup = {
    wantedBy = [ "timers.target" ];
    timerConfig = {
      OnCalendar = "03:00";
      Persistent = true;
    };
  };

  ########################################
  # System Packages
  ########################################
  environment.systemPackages = [
    pkgs.git
    pkgs.tmux
    pkgs.htop
    pkgs.podman-compose
    
    # Beets CLI wrapper
    (pkgs.writeShellScriptBin "beet" ''
      exec ${pkgs.podman}/bin/podman run --rm -it \
        -v /data/daten/DJing:/data/daten/DJing \
        -v /opt/dj-beets/config.yaml:/etc/beets/config.yaml:ro \
        -v /opt/dj-beets/beatport_token.json:/opt/dj-beets/beatport_token.json \
        -e BEETS_CONFIG=/etc/beets/config.yaml \
        -u $(id -u):$(id -g) \
        dj-beets:latest \
        beet "$@"
    '')
  ];

  ########################################
  # DJ-Beets Services
  ########################################
  # Systemd service to build dj-beets image on deploy
  systemd.services.dj-beets-build = {
    description = "Build dj-beets Docker image";
    wantedBy = [ "multi-user.target" ];
    before = [ "podman-dj-beets-web.service" ];
    after = [ "podman.service" ];
    wants = [ "podman.service" ];
    serviceConfig = {
      Type = "oneshot";
      RemainAfterExit = true;
      ExecStart = pkgs.writeShellScript "build-dj-beets" ''
        set -euo pipefail
        if [ ! -f /opt/dj-beets/Dockerfile ]; then
          echo "ERROR: Dockerfile not found at /opt/dj-beets" >&2
          echo "Deploy with 'make deploy-fileserver' first" >&2
          exit 1
        fi
        cd /opt/dj-beets
        ${pkgs.podman}/bin/podman build -t dj-beets:latest .
        echo "dj-beets image built successfully"
      '';
      User = "root";
    };
  };

  # Auto-import service using Docker container
  systemd.services.dj-beets-autoimport = {
    description = "Auto-import music into beets library via Docker";
    after = [ "dj-beets-build.service" ];
    wants = [ "dj-beets-build.service" ];
    serviceConfig = {
      Type = "oneshot";
      ExecStart = pkgs.writeShellScript "beets-autoimport" ''
        set -euo pipefail
        INBOX="/data/daten/DJing/Inbox"
        LOG="/data/daten/DJing/Data/BeetsAutoImport.log"
        
        # Check if inbox has files
        if ! find "$INBOX" -mindepth 1 -maxdepth 1 -type f -print -quit | grep -q .; then
          echo "[$(date)] No files in Inbox, skipping" >> "$LOG"
          exit 0
        fi
        
        echo "[$(date)] Starting beets import" >> "$LOG"
        ${pkgs.podman}/bin/podman run --rm \
          -v /data/daten/DJing:/data/daten/DJing \
          -v /opt/dj-beets/config.yaml:/etc/beets/config.yaml:ro \
          -v /opt/dj-beets/beatport_token.json:/opt/dj-beets/beatport_token.json \
          -e BEETS_CONFIG=/etc/beets/config.yaml \
          localhost/dj-beets:latest \
          beet import -q /data/daten/DJing/Inbox >> "$LOG" 2>&1
      '';
      # Use root so the service can access the root Podman image storage
      User = "root";
      Group = "root";
    };
  };

  systemd.timers.dj-beets-autoimport = {
    wantedBy = [ "timers.target" ];
    timerConfig = {
      OnCalendar = "*:0/10";  # Every 10 minutes
      Persistent = true;
    };
  };

  ########################################
  # Firewall
  ########################################
  networking.firewall.enable = true;
  
  networking.firewall.allowedTCPPorts = [ 22 139 445 8080 8337 5357 3000 2222 ]; # 5357 WSD
  networking.firewall.allowedUDPPorts = [ 137 138 3702 5353 ]; # NetBIOS + WSD (3702) + mDNS (5353)
}