{
  "dashboard": {
    "title": "DBIS Core - System Health",
    "tags": ["system", "health", "overview"],
    "timezone": "browser",
    "schemaVersion": 27,
    "version": 1,
    "refresh": "30s",
    "panels": [
      {
        "id": 1,
        "title": "Service Health Status",
        "type": "stat",
        "targets": [
          {
            "expr": "up{job=\"dbis-core\"}",
            "legendFormat": "{{instance}}"
          }
        ],
        "fieldConfig": {
          "defaults": {
            "thresholds": {
              "mode": "absolute",
              "steps": [
                {"value": 0, "color": "red"},
                {"value": 1, "color": "green"}
              ]
            }
          }
        },
        "gridPos": {"h": 4, "w": 6, "x": 0, "y": 0}
      },
      {
        "id": 2,
        "title": "Overall System Status",
        "type": "stat",
        "targets": [
          {
            "expr": "count(up{job=\"dbis-core\"} == 1) / count(up{job=\"dbis-core\"}) * 100",
            "legendFormat": "Health %"
          }
        ],
        "gridPos": {"h": 4, "w": 6, "x": 6, "y": 0}
      },
      {
        "id": 3,
        "title": "Total Error Rate",
        "type": "graph",
        "targets": [
          {
            "expr": "sum(rate(http_requests_total{status=~\"5..\"}[5m]))",
            "legendFormat": "5xx Errors/sec"
          },
          {
            "expr": "sum(rate(http_requests_total{status=~\"4..\"}[5m]))",
            "legendFormat": "4xx Errors/sec"
          }
        ],
        "gridPos": {"h": 8, "w": 12, "x": 12, "y": 0}
      },
      {
        "id": 4,
        "title": "CPU Usage by Service",
        "type": "graph",
        "targets": [
          {
            "expr": "rate(process_cpu_seconds_total{job=\"dbis-core\"}[5m]) * 100",
            "legendFormat": "{{instance}} - {{service}}"
          }
        ],
        "gridPos": {"h": 8, "w": 12, "x": 0, "y": 8}
      },
      {
        "id": 5,
        "title": "Memory Usage by Service",
        "type": "graph",
        "targets": [
          {
            "expr": "process_resident_memory_bytes{job=\"dbis-core\"} / 1024 / 1024",
            "legendFormat": "{{instance}} - {{service}} (MB)"
          }
        ],
        "gridPos": {"h": 8, "w": 12, "x": 12, "y": 8}
      },
      {
        "id": 6,
        "title": "Database Connection Pool",
        "type": "graph",
        "targets": [
          {
            "expr": "db_pool_size{job=\"dbis-core\"}",
            "legendFormat": "Pool Size"
          },
          {
            "expr": "db_pool_active{job=\"dbis-core\"}",
            "legendFormat": "Active Connections"
          },
          {
            "expr": "db_pool_idle{job=\"dbis-core\"}",
            "legendFormat": "Idle Connections"
          }
        ],
        "gridPos": {"h": 8, "w": 12, "x": 0, "y": 16}
      },
      {
        "id": 7,
        "title": "Request Rate by Service",
        "type": "graph",
        "targets": [
          {
            "expr": "sum(rate(http_requests_total{job=\"dbis-core\"}[5m])) by (service)",
            "legendFormat": "{{service}}"
          }
        ],
        "gridPos": {"h": 8, "w": 12, "x": 12, "y": 16}
      },
      {
        "id": 8,
        "title": "Active Sessions",
        "type": "stat",
        "targets": [
          {
            "expr": "dbis_sessions_active",
            "legendFormat": "Active"
          }
        ],
        "gridPos": {"h": 4, "w": 6, "x": 0, "y": 24}
      },
      {
        "id": 9,
        "title": "Queue Length",
        "type": "graph",
        "targets": [
          {
            "expr": "dbis_queue_length{queue=\"dual_ledger_outbox\"}",
            "legendFormat": "Outbox Queue"
          },
          {
            "expr": "dbis_queue_length{queue=\"settlement\"}",
            "legendFormat": "Settlement Queue"
          }
        ],
        "gridPos": {"h": 8, "w": 18, "x": 6, "y": 24}
      }
    ]
  }
}