{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://stac-extensions.github.io/eo/v2.0.0-beta.1/schema.json#",
  "title": "EO Extension",
  "description": "STAC EO Extension for STAC Items and STAC Collections.",
  "type": "object",
  "required": ["stac_extensions", "type"],
  "properties": {
    "stac_extensions": {
      "type": "array",
      "contains": {
        "const": "https://stac-extensions.github.io/eo/v2.0.0-beta.1/schema.json"
      }
    }
  },
  "allOf": [
    {
      "$comment": "Items",
      "if": {
        "properties": {
          "type": {
            "const": "Feature"
          }
        }
      },
      "then": {
        "allOf": [
          {
            "properties": {
              "properties": {
                "$ref": "#/definitions/validate_properties"
              }
            }
          },
          {
            "$ref": "#/definitions/validate_assets"
          }
        ],
        "anyOf": [
          {
            "required": ["properties"],
            "properties": {
              "properties": {
                "$ref": "#/definitions/require_properties"
              }
            }
          },
          {
            "$ref": "#/definitions/require_assets"
          }
        ]
      }
    },
    {
      "$comment": "Collections",
      "if": {
        "properties": {
          "type": {
            "const": "Collection"
          }
        }
      },
      "then": {
        "allOf": [
          {
            "$ref": "#/definitions/validate_assets"
          },
          {
            "properties": {
              "item_assets": {
                "additionalProperties": {
                  "$ref": "#/definitions/validate_properties"
                }
              }
            }
          },
          {
            "properties": {
              "summaries": {
                "type": "object",
                "$comment": "We can't properly validate summary objects types (min/max or schemas) yet.",
                "allOf": [
                  {
                    "$ref": "#/definitions/validate_bands"
                  },
                  {
                    "properties": {
                      "eo:cloud_cover": {
                        "type": ["array", "object"],
                        "items": {
                          "$ref": "#/definitions/eo:cloud_cover"
                        }
                      }
                    }
                  },
                  {
                    "properties": {
                      "eo:snow_cover": {
                        "type": ["array", "object"],
                        "items": {
                          "$ref": "#/definitions/eo:snow_cover"
                        }
                      }
                    }
                  },
                  {
                    "properties": {
                      "eo:common_name": {
                        "type": ["array", "object"],
                        "items": {
                          "$ref": "#/definitions/eo:common_name"
                        }
                      }
                    }
                  },
                  {
                    "properties": {
                      "eo:center_wavelength": {
                        "type": ["array", "object"],
                        "items": {
                          "$ref": "#/definitions/eo:center_wavelength"
                        }
                      }
                    }
                  },
                  {
                    "properties": {
                      "eo:full_width_half_max": {
                        "type": ["array", "object"],
                        "items": {
                          "$ref": "#/definitions/eo:full_width_half_max"
                        }
                      }
                    }
                  },
                  {
                    "properties": {
                      "eo:solar_illumination": {
                        "type": ["array", "object"],
                        "items": {
                          "$ref": "#/definitions/eo:solar_illumination"
                        }
                      }
                    }
                  }
                ]
              }
            }
          }
        ],
        "anyOf": [
          {
            "$ref": "#/definitions/require_assets"
          },
          {
            "required": ["item_assets"],
            "properties": {
              "item_assets": {
                "$ref": "#/definitions/asset_contains"
              }
            }
          },
          {
            "required": ["summaries"],
            "properties": {
              "summaries": {
                "$ref": "#/definitions/require_properties"
              }
            }
          }
        ]
      }
    }
  ],
  "definitions": {
    "require_properties": {
      "anyOf": [
        {
          "$ref": "#/definitions/require_fields"
        },
        {
          "$ref": "#/definitions/require_in_bands"
        }
      ]
    },
    "validate_bands": {
      "type": "object",
      "properties": {
        "bands": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/fields"
          }
        }
      }
    },
    "validate_properties": {
      "allOf": [
        {
          "$ref": "#/definitions/fields"
        },
        {
          "$ref": "#/definitions/validate_bands"
        }
      ]
    },
    "require_assets": {
      "required": ["assets"],
      "properties": {
        "assets": {
          "$ref": "#/definitions/asset_contains"
        }
      }
    },
    "validate_assets": {
      "properties": {
        "assets": {
          "additionalProperties": {
            "$ref": "#/definitions/validate_properties"
          }
        }
      }
    },
    "asset_contains": {
      "type": "object",
      "not": {
        "additionalProperties": {
          "not": {
            "$ref": "#/definitions/require_properties"
          }
        }
      }
    },
    "require_in_bands": {
      "required": ["bands"],
      "properties": {
        "bands": {
          "type": "array",
          "contains": {
            "$ref": "#/definitions/require_fields"
          }
        }
      }
    },
    "require_fields": {
      "anyOf": [
        { "required": ["eo:cloud_cover"] },
        { "required": ["eo:snow_cover"] },
        { "required": ["eo:common_name"] },
        { "required": ["eo:center_wavelength"] },
        { "required": ["eo:full_width_half_max"] },
        { "required": ["eo:solar_illumination"] }
      ]
    },
    "fields": {
      "type": "object",
      "properties": {
        "eo:cloud_cover": {
          "$ref": "#/definitions/eo:cloud_cover"
        },
        "eo:snow_cover": {
          "$ref": "#/definitions/eo:snow_cover"
        },
        "eo:common_name": {
          "$ref": "#/definitions/eo:common_name"
        },
        "eo:center_wavelength": {
          "$ref": "#/definitions/eo:center_wavelength"
        },
        "eo:full_width_half_max": {
          "$ref": "#/definitions/eo:full_width_half_max"
        },
        "eo:solar_illumination": {
          "$ref": "#/definitions/eo:solar_illumination"
        }
      },
      "patternProperties": {
        "^(?!eo:)": {}
      },
      "additionalProperties": false
    },
    "eo:cloud_cover": {
      "title": "Cloud Cover",
      "type": "number",
      "minimum": 0,
      "maximum": 100
    },
    "eo:snow_cover": {
      "title": "Snow and Ice Cover",
      "type": "number",
      "minimum": 0,
      "maximum": 100
    },
    "eo:common_name": {
      "title": "Common Name of the band",
      "type": "string",
      "enum": [
        "pan",
        "coastal",
        "blue",
        "green",
        "green05",
        "yellow",
        "red",
        "rededge",
        "rededge071",
        "rededge075",
        "rededge078",
        "nir",
        "nir08",
        "nir09",
        "cirrus",
        "swir16",
        "swir22",
        "lwir",
        "lwir11",
        "lwir12"
      ]
    },
    "eo:center_wavelength": {
      "title": "Center Wavelength",
      "type": "number",
      "minimumExclusive": 0
    },
    "eo:full_width_half_max": {
      "title": "Full Width Half Max (FWHM)",
      "type": "number",
      "minimumExclusive": 0
    },
    "eo:solar_illumination": {
      "title": "Solar Illumination",
      "type": "number",
      "minimum": 0
    }
  }
}