{
    "$schema": "http://json-schema.org/draft-07/schema",
    "type": "object",
    "properties": {
        "mqtt": {
            "type": "object",
            "description": "Configuration of the MQTT server upstream",
            "properties": {
                "host": {
                    "type": "string",
                    "description": "The hostname or IP of the MQTT server"
                },
                "port": {
                    "type": "number",
                    "description": "The port of the MQTT server",
                    "default": 1883
                },
                "authentication": {
                    "type": "boolean",
                    "description": "Whether or not the endpoint requires authentication",
                    "default": false
                }
            },
            "if": {
                "properties": {
                    "authentication": {
                        "const": true
                    }
                }
            },
            "then": {
                "properties": {
                    "user": {
                        "type": "string",
                        "description": "The username to log into MQTT",
                        "pattern": "([a-z-_]){2,}"
                    },
                    "password": {
                        "type": "string",
                        "description": "The user's password",
                        "pattern": "([\\w!#_\\-()]){3,}"
                    }
                },
                "required": [
                    "user",
                    "password"
                ]
            },
            "else": {
                "additionalProperties": false
            },
            "required": [
                "host",
                "authentication"
            ]
        },
        "topics": {
            "type": "array",
            "items": {
                "type": "object",
                "properties": {
                    "topic": {
                        "type": "string"
                    },
                    "pin": {
                        "type": "number"
                    },
                    "mode": {
                        "type": "string",
                        "enum": [
                            "in",
                            "out"
                        ],
                        "description": ""
                    }
                },
                "if": {
                    "properties": {
                        "mode": {
                            "const": "in"
                        }
                    }
                },
                "then": {
                    "properties": {
                        "pollInterval": {
                            "type": "number",
                            "description": "The time between polls of the value of the GPIO pin, in milliseconds. Updates are only sent if state changes",
                            "minimum": 100,
                            "maximum": 65535
                        }
                    },
                    "required": [
                        "topic",
                        "pin",
                        "mode",
                        "pollInterval"
                    ]
                },
                "else": {},
                "required": [
                    "topic",
                    "pin",
                    "mode"
                ]
            }
        }
    }
}