{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/Abdess/retrobios/schemas/database.schema.json",
  "title": "RetroBIOS content database",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schema_version",
    "generated_at",
    "total_files",
    "total_size",
    "files",
    "indexes"
  ],
  "properties": {
    "schema_version": {
      "const": 1
    },
    "generated_at": {
      "type": "string",
      "format": "date-time"
    },
    "total_files": {
      "type": "integer",
      "minimum": 0
    },
    "total_size": {
      "type": "integer",
      "minimum": 0
    },
    "bios_dir": {
      "type": "string",
      "description": "Directory the files were scanned from; _mame_clones.json sits beside it."
    },
    "files": {
      "type": "object",
      "propertyNames": {
        "pattern": "^[a-f0-9]{40}$"
      },
      "additionalProperties": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "path",
          "name",
          "size",
          "sha1",
          "md5",
          "sha256",
          "crc32",
          "adler32"
        ],
        "properties": {
          "path": {
            "type": "string",
            "minLength": 1
          },
          "name": {
            "type": "string",
            "minLength": 1
          },
          "size": {
            "type": "integer",
            "minimum": 0
          },
          "sha1": {
            "type": "string",
            "pattern": "^[a-f0-9]{40}$"
          },
          "md5": {
            "type": "string",
            "pattern": "^[a-f0-9]{32}$"
          },
          "sha256": {
            "type": "string",
            "pattern": "^[a-f0-9]{64}$"
          },
          "crc32": {
            "type": "string",
            "pattern": "^[a-f0-9]{8}$"
          },
          "adler32": {
            "type": "string",
            "pattern": "^[a-f0-9]{8}$"
          },
          "provenance": {
            "type": "object"
          }
        }
      }
    },
    "indexes": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "by_md5",
        "by_name",
        "by_crc32",
        "by_sha256",
        "by_path_suffix"
      ],
      "properties": {
        "by_md5": {
          "$ref": "#/$defs/hashIndex"
        },
        "by_crc32": {
          "$ref": "#/$defs/hashIndex"
        },
        "by_sha256": {
          "$ref": "#/$defs/hashIndex"
        },
        "by_name": {
          "$ref": "#/$defs/listIndex"
        },
        "by_path_suffix": {
          "$ref": "#/$defs/listIndex"
        }
      }
    }
  },
  "$defs": {
    "hashIndex": {
      "type": "object",
      "additionalProperties": {
        "type": "string",
        "pattern": "^[a-f0-9]{40}$"
      }
    },
    "listIndex": {
      "type": "object",
      "additionalProperties": {
        "type": "array",
        "items": {
          "type": "string",
          "pattern": "^[a-f0-9]{40}$"
        },
        "minItems": 1,
        "uniqueItems": true
      }
    }
  }
}