{
  "schema_version": 1,
  "nodes": [
    {
      "id": "statuses",
      "type": "source.inline",
      "label": "Student statuses",
      "position": {"x": 40, "y": 80},
      "config": {
        "source_name": "student_statuses",
        "fixture": "student-statuses.json",
        "rows": []
      }
    },
    {
      "id": "exclusions",
      "type": "source.inline",
      "label": "Export exclusions",
      "position": {"x": 520, "y": 300},
      "config": {
        "source_name": "export_exclusions",
        "fixture": "export-exclusions.json",
        "rows": []
      }
    },
    {
      "id": "latest-rank",
      "type": "window.rank",
      "label": "Latest status per student",
      "position": {"x": 280, "y": 80},
      "config": {
        "method": "row_number",
        "target_column": "status_rank",
        "partition_by": ["student_id"],
        "order_by": [
          {"column": "status_date", "direction": "desc"}
        ]
      }
    },
    {
      "id": "latest-only",
      "type": "filter",
      "label": "Keep latest status",
      "position": {"x": 520, "y": 80},
      "config": {
        "column": "status_rank",
        "operator": "eq",
        "value": 1
      }
    },
    {
      "id": "eligible-only",
      "type": "combine.join",
      "label": "Exclude ineligible students",
      "position": {"x": 760, "y": 160},
      "config": {
        "join_type": "anti",
        "left_keys": ["student_id"],
        "right_keys": ["student_id"],
        "right_prefix": "excluded_"
      }
    },
    {
      "id": "export-calculations",
      "type": "calculate",
      "label": "Calculate export fields",
      "position": {"x": 1000, "y": 160},
      "config": {
        "calculations": [
          {
            "target_column": "full_name",
            "expression": "trim(first_name) || ' ' || trim(last_name)",
            "result_type": "string"
          },
          {
            "target_column": "birth_date_display",
            "expression": "to_char(birth_date, 'DD.MM.YYYY')",
            "result_type": "string"
          },
          {
            "target_column": "status_group",
            "expression": "case when status in ('active', 'enrolled') then 'current' else 'inactive' end",
            "result_type": "string"
          }
        ]
      }
    },
    {
      "id": "export-fields",
      "type": "select",
      "label": "HEICO export",
      "position": {"x": 1240, "y": 160},
      "config": {
        "fields": [
          {"column": "student_id", "alias": "student_id"},
          {"column": "full_name", "alias": "full_name"},
          {"column": "birth_date_display", "alias": "birth_date"},
          {"column": "program", "alias": "program"},
          {"column": "status_group", "alias": "status_group"}
        ]
      }
    },
    {
      "id": "output",
      "type": "output",
      "label": "Export rows",
      "position": {"x": 1480, "y": 160},
      "config": {}
    }
  ],
  "edges": [
    {"id": "e1", "source": "statuses", "target": "latest-rank"},
    {"id": "e2", "source": "latest-rank", "target": "latest-only"},
    {
      "id": "e3",
      "source": "latest-only",
      "target": "eligible-only",
      "target_port": "left"
    },
    {
      "id": "e4",
      "source": "exclusions",
      "target": "eligible-only",
      "target_port": "right"
    },
    {"id": "e5", "source": "eligible-only", "target": "export-calculations"},
    {"id": "e6", "source": "export-calculations", "target": "export-fields"},
    {"id": "e7", "source": "export-fields", "target": "output"}
  ]
}