{
  "schema_version": 1,
  "nodes": [
    {
      "id": "bookings",
      "type": "source.inline",
      "label": "Bookings",
      "position": {"x": 40, "y": 120},
      "config": {
        "source_name": "bookings",
        "fixture": "bookings.json",
        "rows": []
      }
    },
    {
      "id": "booking-calculations",
      "type": "calculate",
      "label": "Normalize and classify",
      "position": {"x": 280, "y": 120},
      "config": {
        "calculations": [
          {
            "target_column": "cost_center",
            "expression": "cast(trim(cost_text) as integer)",
            "result_type": "integer"
          },
          {
            "target_column": "period",
            "expression": "to_char(booking_date, 'YYYY/MM')",
            "result_type": "string"
          },
          {
            "target_column": "booking_class",
            "expression": "case when cost_center between 62000 and 65999 then 'personnel' when cost_center between 97000000 and 97999999 then 'allocation' else 'other' end",
            "result_type": "string"
          },
          {
            "target_column": "signed_amount",
            "expression": "case when entry_type = 'credit' then 0 - amount else amount end",
            "result_type": "integer"
          },
          {
            "target_column": "record_key",
            "expression": "lpad(cast(sequence as text), 6, '0')",
            "result_type": "string"
          }
        ]
      }
    },
    {
      "id": "required-fields",
      "type": "quality.rules",
      "label": "Required booking fields",
      "position": {"x": 520, "y": 120},
      "config": {
        "rules": [
          {"id": "cost-center", "column": "cost_center", "operator": "not_null"},
          {"id": "period", "column": "period", "operator": "not_null"},
          {"id": "amount", "column": "signed_amount", "operator": "not_null"}
        ],
        "action": "fail"
      }
    },
    {
      "id": "booking-summary",
      "type": "aggregate",
      "label": "Monthly booking summary",
      "position": {"x": 760, "y": 120},
      "config": {
        "group_by": ["period", "booking_class"],
        "aggregates": [
          {"function": "count", "column": "*", "alias": "booking_count"},
          {"function": "sum", "column": "signed_amount", "alias": "net_amount"}
        ]
      }
    },
    {
      "id": "summary-order",
      "type": "sort",
      "label": "Order summary",
      "position": {"x": 1000, "y": 120},
      "config": {
        "fields": [
          {"column": "period", "direction": "asc"},
          {"column": "booking_class", "direction": "asc"}
        ]
      }
    },
    {
      "id": "output",
      "type": "output",
      "label": "Booking summary",
      "position": {"x": 1240, "y": 120},
      "config": {}
    }
  ],
  "edges": [
    {"id": "e1", "source": "bookings", "target": "booking-calculations"},
    {"id": "e2", "source": "booking-calculations", "target": "required-fields"},
    {"id": "e3", "source": "required-fields", "target": "booking-summary"},
    {"id": "e4", "source": "booking-summary", "target": "summary-order"},
    {"id": "e5", "source": "summary-order", "target": "output"}
  ]
}