{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://architecture.studio/schema/product-observation.schema.json",
  "title": "Unadopted product observation and explicit item binding",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schema_version",
    "observation_id",
    "observed_at",
    "source",
    "product",
    "configuration",
    "fields"
  ],
  "properties": {
    "schema_version": {
      "const": 1
    },
    "observation_id": {
      "type": "string",
      "format": "uuid"
    },
    "observed_at": {
      "type": "string",
      "format": "date-time"
    },
    "source": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "kind",
        "reference",
        "content_sha256"
      ],
      "properties": {
        "kind": {
          "enum": [
            "url",
            "pdf",
            "workbook",
            "supplied"
          ]
        },
        "reference": {
          "type": "string",
          "minLength": 1
        },
        "content_sha256": {
          "type": [
            "string",
            "null"
          ],
          "pattern": "^[a-f0-9]{64}$"
        }
      }
    },
    "product": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "manufacturer",
        "model",
        "manufacturer_sku",
        "vendor_item_id",
        "storefront_id"
      ],
      "properties": {
        "manufacturer": {
          "type": [
            "string",
            "null"
          ]
        },
        "model": {
          "type": [
            "string",
            "null"
          ]
        },
        "manufacturer_sku": {
          "type": [
            "string",
            "null"
          ]
        },
        "vendor_item_id": {
          "type": [
            "string",
            "null"
          ]
        },
        "storefront_id": {
          "type": [
            "string",
            "null"
          ]
        }
      }
    },
    "configuration": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "selected",
        "available"
      ],
      "properties": {
        "selected": {
          "type": "object",
          "additionalProperties": {
            "type": [
              "string",
              "number",
              "boolean",
              "null"
            ]
          }
        },
        "available": {
          "type": "object",
          "additionalProperties": {
            "type": "array",
            "items": {
              "type": [
                "string",
                "number",
                "boolean",
                "null"
              ]
            },
            "uniqueItems": true
          }
        }
      }
    },
    "fields": {
      "type": "array",
      "minItems": 1,
      "maxItems": 10000,
      "items": {
        "oneOf": [
          {
            "$ref": "#/$defs/textField"
          },
          {
            "$ref": "#/$defs/priceField"
          },
          {
            "$ref": "#/$defs/quantityField"
          },
          {
            "$ref": "#/$defs/imageField"
          }
        ]
      }
    }
  },
  "$defs": {
    "textField": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "field",
        "kind",
        "value",
        "status",
        "locator",
        "unit",
        "meaning",
        "currency",
        "price_basis",
        "variant_match"
      ],
      "properties": {
        "field": {
          "type": "string",
          "minLength": 1
        },
        "kind": {
          "const": "text"
        },
        "value": {
          "type": [
            "string",
            "null"
          ]
        },
        "status": {
          "enum": [
            "observed",
            "unknown",
            "unavailable",
            "inferred"
          ]
        },
        "locator": {
          "type": "string",
          "minLength": 1
        },
        "unit": {
          "type": "null"
        },
        "meaning": {
          "type": "null"
        },
        "currency": {
          "type": "null"
        },
        "price_basis": {
          "type": "null"
        },
        "variant_match": {
          "enum": [
            "exact",
            "family",
            "unknown"
          ]
        }
      },
      "allOf": [
        {
          "if": {
            "properties": {
              "status": {
                "enum": [
                  "unknown",
                  "unavailable"
                ]
              }
            }
          },
          "then": {
            "properties": {
              "value": {
                "const": null
              }
            }
          }
        }
      ]
    },
    "priceField": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "field",
        "kind",
        "value",
        "status",
        "locator",
        "unit",
        "meaning",
        "currency",
        "price_basis",
        "variant_match"
      ],
      "properties": {
        "field": {
          "type": "string",
          "minLength": 1
        },
        "kind": {
          "const": "price"
        },
        "value": {
          "type": [
            "number",
            "null"
          ],
          "minimum": 0
        },
        "status": {
          "enum": [
            "observed",
            "unknown",
            "unavailable",
            "inferred"
          ]
        },
        "locator": {
          "type": "string",
          "minLength": 1
        },
        "unit": {
          "type": "null"
        },
        "meaning": {
          "type": "null"
        },
        "currency": {
          "type": [
            "string",
            "null"
          ],
          "pattern": "^[A-Z]{3}$"
        },
        "price_basis": {
          "type": [
            "string",
            "null"
          ]
        },
        "variant_match": {
          "enum": [
            "exact",
            "family",
            "unknown"
          ]
        }
      },
      "allOf": [
        {
          "if": {
            "properties": {
              "status": {
                "enum": [
                  "unknown",
                  "unavailable"
                ]
              }
            }
          },
          "then": {
            "properties": {
              "value": {
                "const": null
              }
            }
          }
        }
      ]
    },
    "quantityField": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "field",
        "kind",
        "value",
        "status",
        "locator",
        "unit",
        "meaning",
        "currency",
        "price_basis",
        "variant_match"
      ],
      "properties": {
        "field": {
          "type": "string",
          "minLength": 1
        },
        "kind": {
          "const": "quantity"
        },
        "value": {
          "type": [
            "number",
            "null"
          ],
          "minimum": 0
        },
        "status": {
          "enum": [
            "observed",
            "unknown",
            "unavailable",
            "inferred"
          ]
        },
        "locator": {
          "type": "string",
          "minLength": 1
        },
        "unit": {
          "type": [
            "string",
            "null"
          ]
        },
        "meaning": {
          "type": [
            "string",
            "null"
          ]
        },
        "currency": {
          "type": "null"
        },
        "price_basis": {
          "type": "null"
        },
        "variant_match": {
          "enum": [
            "exact",
            "family",
            "unknown"
          ]
        }
      },
      "allOf": [
        {
          "if": {
            "properties": {
              "status": {
                "enum": [
                  "unknown",
                  "unavailable"
                ]
              }
            }
          },
          "then": {
            "properties": {
              "value": {
                "const": null
              }
            }
          }
        }
      ]
    },
    "imageField": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "field",
        "kind",
        "value",
        "status",
        "locator",
        "unit",
        "meaning",
        "currency",
        "price_basis",
        "variant_match"
      ],
      "properties": {
        "field": {
          "type": "string",
          "minLength": 1
        },
        "kind": {
          "const": "image"
        },
        "value": {
          "type": [
            "string",
            "null"
          ],
          "format": "uri"
        },
        "status": {
          "enum": [
            "observed",
            "unknown",
            "unavailable",
            "inferred"
          ]
        },
        "locator": {
          "type": "string",
          "minLength": 1
        },
        "unit": {
          "type": "null"
        },
        "meaning": {
          "type": "null"
        },
        "currency": {
          "type": "null"
        },
        "price_basis": {
          "type": "null"
        },
        "variant_match": {
          "enum": [
            "exact",
            "family",
            "unknown"
          ]
        }
      },
      "allOf": [
        {
          "if": {
            "properties": {
              "status": {
                "enum": [
                  "unknown",
                  "unavailable"
                ]
              }
            }
          },
          "then": {
            "properties": {
              "value": {
                "const": null
              }
            }
          }
        }
      ]
    },
    "item": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "item_id",
        "revision",
        "tag",
        "fields",
        "provenance",
        "decision_refs"
      ],
      "properties": {
        "item_id": {
          "type": "string",
          "format": "uuid"
        },
        "revision": {
          "type": "integer",
          "minimum": 1
        },
        "tag": {
          "type": "string",
          "minLength": 1
        },
        "fields": {
          "type": "object"
        },
        "provenance": {
          "type": "object",
          "additionalProperties": {
            "type": "object",
            "additionalProperties": false,
            "required": ["status"],
            "properties": {
              "status": {"enum": ["supplied", "verified", "unknown", "inferred"]},
              "source": {"type": "string"},
              "retrieved_at": {"type": "string"},
              "note": {"type": "string"}
            }
          }
        },
        "decision_refs": {
          "type": "array",
          "items": {
            "type": "string"
          }
        }
      }
    },
    "binding": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "observation_id",
        "item_id",
        "expected_revision",
        "fields"
      ],
      "properties": {
        "observation_id": {
          "type": "string",
          "format": "uuid"
        },
        "item_id": {
          "type": "string",
          "format": "uuid"
        },
        "expected_revision": {
          "type": "integer",
          "minimum": 1
        },
        "fields": {
          "type": "object",
          "minProperties": 1,
          "additionalProperties": {
            "type": "string",
            "minLength": 1
          }
        }
      }
    },
    "adapter": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "schema_version",
        "observations",
        "items",
        "bindings"
      ],
      "properties": {
        "schema_version": {
          "const": 1
        },
        "observations": {
          "type": "array",
          "minItems": 1,
          "maxItems": 1000,
          "items": {
            "$ref": "#"
          }
        },
        "items": {
          "type": "array",
          "minItems": 1,
          "maxItems": 10000,
          "items": {
            "$ref": "#/$defs/item"
          }
        },
        "bindings": {
          "type": "array",
          "minItems": 1,
          "maxItems": 10000,
          "items": {
            "$ref": "#/$defs/binding"
          }
        }
      }
    }
  }
}