# Jellyfin Module
#
# Self-hosted media server (Plex alternative).
# For Tier 3 media streaming.
#
# Usage:
#   services.jellyfin-managed.enable = true;
#   services.jellyfin-managed.domain = "media.yourdomain.com";
#   services.jellyfin-managed.mediaLibraries = [ "/mnt/media/movies" "/mnt/media/tv" ];

{ config, lib, pkgs, ... }:

with lib;

let
  cfg = config.services.jellyfin-managed;
in {
  options.services.jellyfin-managed = {
    enable = mkEnableOption "managed Jellyfin media server";

    domain = mkOption {
      type = types.str;
      description = "Domain name for Jellyfin.";
      example = "media.example.com";
    };

    port = mkOption {
      type = types.port;
      default = 8096;
      description = "HTTP port for Jellyfin.";
    };

    mediaLibraries = mkOption {
      type = types.listOf types.str;
      default = [];
      description = "Paths to media libraries.";
      example = [ "/mnt/media/movies" "/mnt/media/tv" "/mnt/media/music" ];
    };

    enableHardwareAcceleration = mkOption {
      type = types.bool;
      default = false;
      description = "Enable hardware transcoding (requires compatible GPU).";
    };

    openFirewall = mkOption {
      type = types.bool;
      default = true;
      description = "Open firewall for Jellyfin ports.";
    };
  };

  config = mkIf cfg.enable {
    services.jellyfin = {
      enable = true;
      openFirewall = cfg.openFirewall;
    };

    # Give jellyfin access to media directories
    systemd.services.jellyfin.serviceConfig.SupplementaryGroups = [
      "render"  # For hardware acceleration
      "video"   # For hardware acceleration
    ];

    # Ensure media directories have correct permissions
    systemd.tmpfiles.rules = map (path:
      "d ${path} 0755 jellyfin jellyfin -"
    ) cfg.mediaLibraries;

    # Hardware acceleration (Intel VAAPI example)
    hardware.graphics = mkIf cfg.enableHardwareAcceleration {
      enable = true;
      extraPackages = with pkgs; [
        intel-media-driver  # For Intel
        # nvidia-vaapi-driver  # For NVIDIA
        libva
      ];
    };

    # Note: For hardware acceleration, jellyfin user needs access to /dev/dri
    users.users.jellyfin.extraGroups = mkIf cfg.enableHardwareAcceleration [
      "render"
      "video"
    ];

    # Reverse proxy example
    # services.caddy.virtualHosts."${cfg.domain}".extraConfig = ''
    #   reverse_proxy localhost:${toString cfg.port}
    # '';
  };
}