{
  "$schema": "http://json-schema.org/draft-07/schema",
  "$id": "blockception.minecraft.resource.texture.texture_set",
  "type": "object",
  "additionalProperties": false,
  "required": ["format_version", "minecraft:texture_set"],
  "properties": {
    "format_version": {
      "title": "Format Version",
      "description": "A version that tells minecraft what type of data format can be expected when reading this file.",
      "enum": ["1.16.100", "1.21.30"]
    },
    "minecraft:texture_set": {
      "title": "Texture Set",
      "description": "Texture Sets are used to define multiple PBR layers for a texture resource.",
      "type": "object",
      "additionalProperties": false,
      "required": ["color"],
      "not": {
        "anyOf": [
          {
            "required": ["heightmap", "normal"]
          },
          {
            "required": ["metalness_emissive_roughness", "metalness_emissive_roughness_subsurface"]
          }
        ]
      },
      "properties": {
        "color": { "$ref": "#/definitions/color" },
        "heightmap": { "$ref": "#/definitions/heightmap" },
        "metalness_emissive_roughness": { "$ref": "#/definitions/mer" },
        "metalness_emissive_roughness_subsurface": { "$ref": "#/definitions/mers" },
        "normal": { "$ref": "#/definitions/normal" }
      }
    }
  },
  "definitions": {
    "file_name": {
      "type": "string",
      "defaultSnippets": [
        {
          "label": "File Name",
          "body": "${1:${TM_FILENAME_BASE}}"
        }
      ]
    },
    "rgb": {
      "defaultSnippets": [
        {
          "label": "RGB Color",
          "body": "#${1:RR}${2:GG}${3:BB}"
        }
      ],
      "oneOf": [
        { "type": "string" },
        {
          "type": "array",
          "minItems": 3,
          "maxItems": 3,
          "items": {
            "type": "integer",
            "minimum": 0,
            "maximum": 255
          }
        }
      ]
    },
    "rgba": {
      "defaultSnippets": [
        {
          "label": "ARGB Color",
          "body": "#${1:AA}${2:RR}${3:GG}${4:BB}"
        }
      ],
      "oneOf": [
        { "type": "string" },
        {
          "type": "array",
          "minItems": 4,
          "maxItems": 4,
          "items": {
            "type": "integer",
            "minimum": 0,
            "maximum": 255
          }
        }
      ]
    },
    "color": {
      "title": "Color",
      "description": "This is an RGB 3-channel image (defaults to uniform alpha of 1.0), or an RGBA 4-channel image, or a 4 value array for a uniform color with alpha.",
      "anyOf": [
        {
          "$ref": "#/definitions/file_name"
        },
        {
          "$ref": "#/definitions/rgba"
        }
      ]
    },
    "heightmap": {
      "title": "Heightmap",
      "description": "1-channel layer image or a single value in this JSON file for a uniform heightmap. This layer and the \"normal\" layer should not both be defined at the same time.",
      "examples": [255],
      "anyOf": [
        {
          "$ref": "#/definitions/file_name"
        },
        {
          "type": "integer",
          "minimum": 0,
          "maximum": 255
        }
      ]
    },
    "mer": {
      "title": "Metalness Emissive Roughness",
      "description": "This is a 3-channel image (or 4-channel where the 4th channel is ignored) or a 3-value array for a uniform MER. RGB images map Red to Metalness, Green to Emissive, and Blue to Roughness.",
      "anyOf": [
        {
          "$ref": "#/definitions/file_name"
        },
        {
          "$ref": "#/definitions/rgb"
        }
      ]
    },
    "mers": {
      "title": "Metalness Emissive Roughness Subsurface",
      "description": "This is a 4-channel image or a 4-value array for a uniform MERS. RGBA images map Red to Metalness, Green to Emissive, Blue to Roughness and Alpha to Subsurface.",
      "anyOf": [
        {
          "$ref": "#/definitions/file_name"
        },
        {
          "$ref": "#/definitions/rgba"
        }
      ]
    },
    "normal": {
      "title": "Normal Map",
      "description": "This is a 3-channel normal map image (or 4-channel where the 4th channel is ignored). This layer and the \"heightmap\" layer should not both be defined at the same time.",
      "$ref": "#/definitions/file_name"
    }
  }
}