{
  ...
}:
let
  promDs = {
    type = "prometheus";
    uid = "prometheus";
  };

  dashboard = {
    editable = true;
    graphTooltip = 1;
    schemaVersion = 39;
    tags = [
      "system"
      "monitoring"
    ];
    time = {
      from = "now-6h";
      to = "now";
    };
    timezone = "browser";
    title = "System Overview";
    uid = "system-overview";

    annotations.list = [
      {
        name = "Jellyfin Streams";
        datasource = {
          type = "grafana";
          uid = "-- Grafana --";
        };
        enable = true;
        iconColor = "green";
        showIn = 0;
        type = "tags";
        tags = [ "jellyfin" ];
      }
      {
        name = "ZFS Scrubs";
        datasource = {
          type = "grafana";
          uid = "-- Grafana --";
        };
        enable = true;
        iconColor = "orange";
        showIn = 0;
        type = "tags";
        tags = [ "zfs-scrub" ];
      }
      {
        name = "LLM Requests";
        datasource = promDs;
        enable = true;
        iconColor = "purple";
        target = {
          datasource = promDs;
          expr = "llamacpp:requests_processing > 0";
          instant = false;
          range = true;
          refId = "A";
        };
        titleFormat = "LLM inference";
      }
    ];

    panels = [
      # -- Row 1: UPS --
      {
        id = 1;
        type = "timeseries";
        title = "UPS Power Draw";
        gridPos = {
          h = 8;
          w = 8;
          x = 0;
          y = 0;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "apcupsd_ups_load_percent / 100 * apcupsd_nominal_power_watts";
            legendFormat = "Power (W)";
            refId = "A";
          }
          {
            datasource = promDs;
            expr = "avg_over_time((apcupsd_ups_load_percent / 100 * apcupsd_nominal_power_watts + 4.5)[5m:])";
            legendFormat = "5m average (W)";
            refId = "B";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "watt";
            color.mode = "palette-classic";
            custom = {
              lineWidth = 2;
              fillOpacity = 20;
              spanNulls = true;
            };
          };
          overrides = [
            {
              matcher = {
                id = "byFrameRefID";
                options = "A";
              };
              properties = [
                {
                  id = "custom.lineStyle";
                  value = {
                    fill = "dot";
                  };
                }
                {
                  id = "custom.fillOpacity";
                  value = 10;
                }
                {
                  id = "custom.lineWidth";
                  value = 1;
                }
                {
                  id = "custom.pointSize";
                  value = 1;
                }
              ];
            }
            {
              matcher = {
                id = "byFrameRefID";
                options = "B";
              };
              properties = [
                {
                  id = "custom.lineWidth";
                  value = 4;
                }
                {
                  id = "custom.fillOpacity";
                  value = 0;
                }
              ];
            }
          ];
        };
      }
      {
        id = 7;
        type = "stat";
        title = "Energy Usage (24h)";
        gridPos = {
          h = 8;
          w = 4;
          x = 8;
          y = 0;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "avg_over_time((apcupsd_ups_load_percent / 100 * apcupsd_nominal_power_watts + 4.5)[24h:]) * 24 / 1000";
            legendFormat = "";
            refId = "A";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "kwatth";
            decimals = 2;
            thresholds = {
              mode = "absolute";
              steps = [
                {
                  color = "green";
                  value = null;
                }
                {
                  color = "yellow";
                  value = 5;
                }
                {
                  color = "red";
                  value = 10;
                }
              ];
            };
          };
          overrides = [ ];
        };
        options = {
          reduceOptions = {
            calcs = [ "lastNotNull" ];
            fields = "";
            values = false;
          };
          colorMode = "value";
          graphMode = "none";
        };
      }
      {
        id = 2;
        type = "gauge";
        title = "UPS Load";
        gridPos = {
          h = 8;
          w = 6;
          x = 12;
          y = 0;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "apcupsd_ups_load_percent";
            refId = "A";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "percent";
            min = 0;
            max = 100;
            thresholds = {
              mode = "absolute";
              steps = [
                {
                  color = "green";
                  value = null;
                }
                {
                  color = "yellow";
                  value = 70;
                }
                {
                  color = "red";
                  value = 90;
                }
              ];
            };
          };
          overrides = [ ];
        };
        options.reduceOptions = {
          calcs = [ "lastNotNull" ];
          fields = "";
          values = false;
        };
      }
      {
        id = 3;
        type = "gauge";
        title = "UPS Battery";
        gridPos = {
          h = 8;
          w = 6;
          x = 18;
          y = 0;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "apcupsd_battery_charge_percent";
            refId = "A";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "percent";
            min = 0;
            max = 100;
            thresholds = {
              mode = "absolute";
              steps = [
                {
                  color = "red";
                  value = null;
                }
                {
                  color = "yellow";
                  value = 20;
                }
                {
                  color = "green";
                  value = 50;
                }
              ];
            };
          };
          overrides = [ ];
        };
        options.reduceOptions = {
          calcs = [ "lastNotNull" ];
          fields = "";
          values = false;
        };
      }

      # -- Row 2: System --
      {
        id = 4;
        type = "timeseries";
        title = "CPU Temperature";
        gridPos = {
          h = 8;
          w = 12;
          x = 0;
          y = 8;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = ''node_hwmon_temp_celsius{chip=~"pci.*"}'';
            legendFormat = "CPU {{sensor}}";
            refId = "A";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "celsius";
            color.mode = "palette-classic";
            custom = {
              lineWidth = 2;
              fillOpacity = 10;
              spanNulls = true;
            };
          };
          overrides = [ ];
        };
      }
      {
        id = 5;
        type = "stat";
        title = "System Uptime";
        gridPos = {
          h = 8;
          w = 6;
          x = 12;
          y = 8;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "time() - node_boot_time_seconds";
            refId = "A";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "s";
            thresholds = {
              mode = "absolute";
              steps = [
                {
                  color = "green";
                  value = null;
                }
              ];
            };
          };
          overrides = [ ];
        };
        options = {
          reduceOptions = {
            calcs = [ "lastNotNull" ];
            fields = "";
            values = false;
          };
          colorMode = "value";
          graphMode = "none";
        };
      }
      {
        id = 6;
        type = "stat";
        title = "Jellyfin Active Streams";
        gridPos = {
          h = 8;
          w = 6;
          x = 18;
          y = 8;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "count(jellyfin_now_playing_state) or vector(0)";
            refId = "A";
          }
        ];
        fieldConfig = {
          defaults = {
            thresholds = {
              mode = "absolute";
              steps = [
                {
                  color = "green";
                  value = null;
                }
                {
                  color = "yellow";
                  value = 3;
                }
                {
                  color = "red";
                  value = 6;
                }
              ];
            };
          };
          overrides = [ ];
        };
        options = {
          reduceOptions = {
            calcs = [ "lastNotNull" ];
            fields = "";
            values = false;
          };
          colorMode = "value";
          graphMode = "area";
        };
      }

      # -- Row 3: qBittorrent --
      {
        id = 11;
        type = "timeseries";
        title = "qBittorrent Speed";
        gridPos = {
          h = 8;
          w = 24;
          x = 0;
          y = 16;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "sum(qbit_dlspeed) or vector(0)";
            legendFormat = "Download";
            refId = "A";
          }
          {
            datasource = promDs;
            expr = "sum(qbit_upspeed) or vector(0)";
            legendFormat = "Upload";
            refId = "B";
          }
          {
            datasource = promDs;
            expr = "avg_over_time((sum(qbit_dlspeed) or vector(0))[10m:])";
            legendFormat = "Download (10m avg)";
            refId = "C";
          }
          {
            datasource = promDs;
            expr = "avg_over_time((sum(qbit_upspeed) or vector(0))[10m:])";
            legendFormat = "Upload (10m avg)";
            refId = "D";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "binBps";
            min = 0;
            color.mode = "palette-classic";
            custom = {
              lineWidth = 1;
              fillOpacity = 10;
              spanNulls = true;
            };
          };
          overrides = [
            {
              matcher = {
                id = "byFrameRefID";
                options = "A";
              };
              properties = [
                {
                  id = "color";
                  value = {
                    fixedColor = "green";
                    mode = "fixed";
                  };
                }
                {
                  id = "custom.fillOpacity";
                  value = 5;
                }
              ];
            }
            {
              matcher = {
                id = "byFrameRefID";
                options = "B";
              };
              properties = [
                {
                  id = "color";
                  value = {
                    fixedColor = "blue";
                    mode = "fixed";
                  };
                }
                {
                  id = "custom.fillOpacity";
                  value = 5;
                }
              ];
            }
            {
              matcher = {
                id = "byFrameRefID";
                options = "C";
              };
              properties = [
                {
                  id = "color";
                  value = {
                    fixedColor = "green";
                    mode = "fixed";
                  };
                }
                {
                  id = "custom.lineWidth";
                  value = 3;
                }
                {
                  id = "custom.fillOpacity";
                  value = 0;
                }
              ];
            }
            {
              matcher = {
                id = "byFrameRefID";
                options = "D";
              };
              properties = [
                {
                  id = "color";
                  value = {
                    fixedColor = "blue";
                    mode = "fixed";
                  };
                }
                {
                  id = "custom.lineWidth";
                  value = 3;
                }
                {
                  id = "custom.fillOpacity";
                  value = 0;
                }
              ];
            }
          ];
        };
      }

      # -- Row 4: Intel GPU --
      {
        id = 8;
        type = "timeseries";
        title = "Intel GPU Utilization";
        gridPos = {
          h = 8;
          w = 24;
          x = 0;
          y = 24;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "igpu_engines_busy_percent";
            legendFormat = "{{engine}}";
            refId = "A";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "percent";
            min = 0;
            max = 100;
            color.mode = "palette-classic";
            custom = {
              lineWidth = 2;
              fillOpacity = 10;
              spanNulls = true;
            };
          };
          overrides = [ ];
        };
      }

      # -- Row 5: Storage --
      {
        id = 12;
        type = "timeseries";
        title = "ZFS Pool Utilization";
        gridPos = {
          h = 8;
          w = 12;
          x = 0;
          y = 32;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "zfs_pool_allocated_bytes{pool=\"tank\"} / zfs_pool_size_bytes{pool=\"tank\"} * 100";
            legendFormat = "tank";
            refId = "A";
          }
          {
            datasource = promDs;
            expr = "zfs_pool_allocated_bytes{pool=\"hdds\"} / zfs_pool_size_bytes{pool=\"hdds\"} * 100";
            legendFormat = "hdds";
            refId = "B";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "percent";
            min = 0;
            max = 100;
            color.mode = "palette-classic";
            custom = {
              lineWidth = 2;
              fillOpacity = 20;
              spanNulls = true;
            };
          };
          overrides = [ ];
        };
      }
      {
        id = 13;
        type = "timeseries";
        title = "Boot Drive Partitions";
        gridPos = {
          h = 8;
          w = 12;
          x = 12;
          y = 32;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "(node_filesystem_size_bytes{mountpoint=\"/boot\"} - node_filesystem_avail_bytes{mountpoint=\"/boot\"}) / node_filesystem_size_bytes{mountpoint=\"/boot\"} * 100";
            legendFormat = "/boot";
            refId = "A";
          }
          {
            datasource = promDs;
            expr = "(node_filesystem_size_bytes{mountpoint=\"/persistent\"} - node_filesystem_avail_bytes{mountpoint=\"/persistent\"}) / node_filesystem_size_bytes{mountpoint=\"/persistent\"} * 100";
            legendFormat = "/persistent";
            refId = "B";
          }
          {
            datasource = promDs;
            expr = "(node_filesystem_size_bytes{mountpoint=\"/nix\"} - node_filesystem_avail_bytes{mountpoint=\"/nix\"}) / node_filesystem_size_bytes{mountpoint=\"/nix\"} * 100";
            legendFormat = "/nix";
            refId = "C";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "percent";
            min = 0;
            max = 100;
            color.mode = "palette-classic";
            custom = {
              lineWidth = 2;
              fillOpacity = 20;
              spanNulls = true;
            };
          };
          overrides = [ ];
        };
      }

      # -- Row 6: Minecraft --
      {
        id = 14;
        type = "stat";
        title = "Minecraft Players";
        gridPos = {
          h = 8;
          w = 6;
          x = 0;
          y = 40;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "sum(minecraft_status_players_online_count) or vector(0)";
            refId = "A";
          }
        ];
        fieldConfig = {
          defaults = {
            thresholds = {
              mode = "absolute";
              steps = [
                {
                  color = "green";
                  value = null;
                }
                {
                  color = "yellow";
                  value = 3;
                }
                {
                  color = "red";
                  value = 6;
                }
              ];
            };
          };
          overrides = [ ];
        };
        options = {
          reduceOptions = {
            calcs = [ "lastNotNull" ];
            fields = "";
            values = false;
          };
          colorMode = "value";
          graphMode = "area";
        };
      }
      {
        id = 15;
        type = "stat";
        title = "Minecraft Server";
        gridPos = {
          h = 8;
          w = 6;
          x = 6;
          y = 40;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "max(minecraft_status_healthy) or vector(0)";
            refId = "A";
          }
        ];
        fieldConfig = {
          defaults = {
            mappings = [
              {
                type = "value";
                options = {
                  "0" = {
                    text = "Offline";
                    color = "red";
                    index = 0;
                  };
                  "1" = {
                    text = "Online";
                    color = "green";
                    index = 1;
                  };
                };
              }
            ];
            thresholds = {
              mode = "absolute";
              steps = [
                {
                  color = "red";
                  value = null;
                }
                {
                  color = "green";
                  value = 1;
                }
              ];
            };
          };
          overrides = [ ];
        };
        options = {
          reduceOptions = {
            calcs = [ "lastNotNull" ];
            fields = "";
            values = false;
          };
          colorMode = "value";
          graphMode = "none";
        };
      }
      {
        id = 16;
        type = "timeseries";
        title = "Minecraft Player Activity";
        gridPos = {
          h = 8;
          w = 12;
          x = 12;
          y = 40;
        };
        datasource = promDs;
        targets = [
          {
            datasource = promDs;
            expr = "sum(minecraft_status_players_online_count) or vector(0)";
            legendFormat = "Online players";
            refId = "A";
          }
          {
            datasource = promDs;
            expr = "max(minecraft_status_players_max_count) or vector(0)";
            legendFormat = "Max players";
            refId = "B";
          }
        ];
        fieldConfig = {
          defaults = {
            unit = "short";
            min = 0;
            decimals = 0;
            color.mode = "palette-classic";
            custom = {
              lineWidth = 2;
              fillOpacity = 15;
              spanNulls = true;
            };
          };
          overrides = [
            {
              matcher = {
                id = "byFrameRefID";
                options = "B";
              };
              properties = [
                {
                  id = "custom.lineStyle";
                  value = {
                    fill = "dash";
                    dash = [
                      8
                      4
                    ];
                  };
                }
                {
                  id = "custom.fillOpacity";
                  value = 0;
                }
                {
                  id = "custom.lineWidth";
                  value = 1;
                }
              ];
            }
          ];
        };
      }
    ];
  };
in
{
  environment.etc."grafana-dashboards/system-overview.json" = {
    text = builtins.toJSON dashboard;
    mode = "0444";
  };
}