{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://tabris.com/fonts-schema.json",
  "title": "Tabris.js Font Resources JSON Schema",
  "definitions": {
    "fontResources": {
      "type": "object",
      "properties": {
        "$schema": {
          "type": "string"
        },
        "$scaleFactor": {
          "enum": [
            "nearest",
            "lower",
            "higher"
          ]
        },
        "$fallbackLanguage": {
          "type": "string",
          "pattern": "^[a-zA-Z][a-zA-Z][a-zA-Z]?(-[\\-a-zA-Z0-9]+)?$"
        }
      },
      "patternProperties": {
        "^[a-z][a-zA-Z][a-zA-Z0-9]+$": {
          "$ref": "#/definitions/fontResource"
        }
      },
      "additionalProperties": false
    },
    "fontResource": {
      "oneOf": [
        {
          "$ref": "#/definitions/fontDefinition"
        },
        {
          "$ref": "#/definitions/fontSelector"
        }
      ]
    },
    "fontSelector": {
      "oneOf": [
        {
          "description": "Platform Selector",
          "type": "object",
          "properties": {
            "ios": {
              "$ref": "#/definitions/fontResource"
            },
            "android": {
              "$ref": "#/definitions/fontResource"
            }
          },
          "required": [
            "ios",
            "android"
          ],
          "additionalProperties": false
        },
        {
          "description": "Resource Reference",
          "type": "object",
          "required": [
            "ref"
          ],
          "properties": {
            "ref": {
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        {
          "description": "Inherit Marker",
          "type": "object",
          "properties": {
            "inherit": {
              "enum": [
                true
              ]
            }
          },
          "required": [
            "inherit"
          ],
          "additionalProperties": false
        },
        {
          "description": "Scale Selector",
          "type": "object",
          "patternProperties": {
            "^([0-9]\\.?[0-9]*)x$": {
              "$ref": "#/definitions/fontResource"
            }
          },
          "additionalProperties": false,
          "minProperties": 1
        },
        {
          "description": "Locale Selector",
          "type": "object",
          "patternProperties": {
            "^[a-zA-Z][a-zA-Z][a-zA-Z]?(-[\\-a-zA-Z0-9]+)?$": {
              "$ref": "#/definitions/fontResource"
            }
          },
          "additionalProperties": false,
          "minProperties": 1,
          "not": {
            "required": [
              "ios"
            ]
          }
        }
      ]
    },
    "fontDefinition": {
      "oneOf": [
        {
          "type": "object",
          "properties": {
            "family": {
              "type": "array",
              "minItems": 1,
              "items": {
                "$ref": "#/definitions/fontFamily"
              }
            },
            "size": {
              "type": "number",
              "minimum": 1
            },
            "style": {
              "enum": [
                "italic",
                "normal"
              ]
            },
            "weight": {
              "enum": [
                "black",
                "bold",
                "medium",
                "thin",
                "light",
                "normal"
              ]
            }
          },
          "required": [
            "size"
          ],
          "additionalProperties": false
        },
        {
          "type": "string",
          "pattern": "^((italic|normal) )?((black|bold|medium|thin|light|normal) )?[1-9][0-9]*px( ([A-Za-z\\-]+|'[A-Za-z \\-]+')(, ?([A-Za-z\\-]+|'[A-Za-z \\-]+'))*)?$"
        }
      ]
    },
    "fontFamily": {
      "anyOf": [
        {
          "enum": [
            "serif",
            "san-serif",
            "monospace",
            "condensed"
          ]
        },
        {
          "type": "string",
          "pattern": "^[A-Za-z][A-Za-z \\-]+$"
        }
      ]
    }
  },
  "oneOf": [
    {
      "$ref": "#/definitions/fontResources"
    }
  ]
}