{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schema.rtemis.org/decomposition/v1/schema.json",
  "title": "rtemis DecompositionConfig",
  "description": "Language-independent config for an rtemis decomposition (dimensionality reduction). Mirrors the `DecompositionConfig` object: an algorithm name, an algorithm-specific `config`, and an optional feature subset. The same config drives rtemis (R), rtemis-py, and rtemislive to identical output.",
  "type": "object",
  "required": ["algorithm", "config"],
  "additionalProperties": false,
  "properties": {
    "$schema": {
      "type": "string",
      "const": "https://schema.rtemis.org/decomposition/v1/schema.json",
      "description": "JSON Schema URI for this config instance."
    },
    "algorithm": {
      "type": "string",
      "enum": ["PCA", "ICA", "NMF", "UMAP", "tSNE", "Isomap"],
      "description": "Decomposition algorithm name."
    },
    "config": {
      "type": "object",
      "description": "Variant-specific parameters. Validated per `algorithm` below."
    },
    "features": {
      "type": ["array", "null"],
      "items": {
        "type": "string"
      },
      "minItems": 2,
      "uniqueItems": true,
      "description": "Names of the feature columns to decompose. null = all numeric features."
    }
  },
  "allOf": [
    {
      "if": {
        "properties": {
          "algorithm": {
            "const": "PCA"
          }
        },
        "required": ["algorithm"]
      },
      "then": {
        "properties": {
          "config": {
            "$ref": "https://schema.rtemis.org/decomposition/pca/v1/schema.json"
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "algorithm": {
            "const": "ICA"
          }
        },
        "required": ["algorithm"]
      },
      "then": {
        "properties": {
          "config": {
            "$ref": "https://schema.rtemis.org/decomposition/ica/v1/schema.json"
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "algorithm": {
            "const": "NMF"
          }
        },
        "required": ["algorithm"]
      },
      "then": {
        "properties": {
          "config": {
            "$ref": "https://schema.rtemis.org/decomposition/nmf/v1/schema.json"
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "algorithm": {
            "const": "UMAP"
          }
        },
        "required": ["algorithm"]
      },
      "then": {
        "properties": {
          "config": {
            "$ref": "https://schema.rtemis.org/decomposition/umap/v1/schema.json"
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "algorithm": {
            "const": "tSNE"
          }
        },
        "required": ["algorithm"]
      },
      "then": {
        "properties": {
          "config": {
            "$ref": "https://schema.rtemis.org/decomposition/tsne/v1/schema.json"
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "algorithm": {
            "const": "Isomap"
          }
        },
        "required": ["algorithm"]
      },
      "then": {
        "properties": {
          "config": {
            "$ref": "https://schema.rtemis.org/decomposition/isomap/v1/schema.json"
          }
        }
      }
    }
  ]
}