{
    "$schema": "https://json-schema.org/draft-07/schema#",
    "title": "SceneDescription",
    "type": "object",
    "ID": 100,
    "properties": {
        "name":        { "type": "string", "ID": 101},
        "description": { "type": "string", "ID": 102},
        "entities": {
            "type": "array",
            "items": { "$ref": "#/definitions/Entity" }
        }
    },
    "required": ["name", "entities"],
    "definitions": {

        "Entity": {
            "type": "object",
            "ID": 200,
            "properties": {
                "entityref":   { "type": "integer", "ID": 201 },
                "parent":      { "type": ["integer", "null"] , "ID": 202},
                "name":        { "type": "string", "ID": 203 },
                "description": { "type": "string", "ID": 204 },
                "children": {
                    "type": "array",
                    "ID": 205,
                    "items": { "type": "integer" }
                },
                "components": { "$ref": "#/definitions/Components" }
            },
            "required": ["entityref", "name", "components"]
        },

        "Components": {
            "type": "object",
            "ID": 300,
            "properties": {
                "transform":  { "$ref": "#/definitions/Transform" },
                "renderer":   { "$ref": "#/definitions/Renderer" },
                "camera":     { "$ref": "#/definitions/Camera" },
                "collider":   { "$ref": "#/definitions/Collider" },
                "rigidbody":  { "$ref": "#/definitions/RigidBody" }
            }
        },

        "Vec3": {
            "type": "array",
            "ID": 401,
            "items": { "type": "number" },
            "minItems": 3,
            "maxItems": 3
        },

        "Vec4": {
            "type": "array",
            "ID": 402,
            "items": { "type": "number" },
            "minItems": 4,
            "maxItems": 4
        },

        "Transform": {
            "type": "object",
            "ID": 301,
            "properties": {
                "position": { "$ref": "#/definitions/Vec3" },
                "rotation": { "$ref": "#/definitions/Vec3" },
                "scale":    { "$ref": "#/definitions/Vec3" }
            },
            "required": ["position", "rotation", "scale"]
        },

        "Renderer": {
            "type": "object",
            "ID": 302,
            "properties": {
                "model":  { "type": "string", "ID": 3021 },
                "shader": { "type": "string", "ID": 3022 },
                "albedo": { "type": "string", "ID": 3023 }
            },
            "required": ["model", "shader"]
        },

        "Camera": {
            "type": "object",
            "ID": 303,
            "properties": {
                "fov":  { "type": "number", "minimum": 1,   "maximum": 179, "ID": 3031 },
                "near": { "type": "number", "minimum": 0.001, "ID": 3032 },
                "far":  { "type": "number", "minimum": 0.1, "ID": 3033 }
            },
            "required": ["fov", "near", "far"]
        },

        "Collider": {
            "type": "object",
            "ID": 304,
            "properties": {
                "type": {
                    "type": "string",
                    "ID": 3041,
                    "enum": ["Box", "Sphere", "Capsule", "ConvexHull", "Mesh", "Compound"]
                },
                "size":       { "$ref": "#/definitions/Vec3" },
                "radius":     { "type": "number", "minimum": 0, "ID": 3042 },
                "halfHeight": { "type": "number", "minimum": 0, "ID": 3043 }
            },
            "required": ["type"],
            "allOf": [
                {
                    "if":   { "properties": { "type": { "const": "Box" } } },
                    "then": { "required": ["size"] }
                },
                {
                    "if":   { "properties": { "type": { "const": "Sphere" } } },
                    "then": { "required": ["radius"] }
                },
                {
                    "if":   { "properties": { "type": { "const": "Capsule" } } },
                    "then": { "required": ["radius", "halfHeight"] }
                }
            ]
        },

        "RigidBody": {
            "type": "object",
            "ID": 305,
            "properties": {
                "type": {
                    "type": "string",
                    "ID": 3051,
                    "enum": ["Static", "Kinematic", "Dynamic"]
                },
                "mass":        { "type": "number", "minimum": 0, "ID": 3052 },
                "friction":    { "type": "number", "minimum": 0, "maximum": 1, "ID": 3053 },
                "restitution": { "type": "number", "minimum": 0, "maximum": 1, "ID": 3054 }
            },
            "required": ["type"]
        }
    }
}