{
    "$schema": "https://json-schema.org/draft-07/schema#",
    "title": "LPAC Standard I/O Driver Message Schema",
    "oneOf": [
        { "$ref": "#/$defs/apdu-transceiver" },
        { "$ref": "#/$defs/http-transceiver" }
    ],
    "$defs": {
        "apdu-transceiver": {
            "type": "object",
            "properties": {
                "type": {
                    "const": "apdu"
                },
                "payload": {
                    "oneOf": [
                        { "$ref": "#/$defs/apdu-request" },
                        { "$ref": "#/$defs/apdu-response" }
                    ]
                }
            },
            "required": ["type", "payload"],
            "additionalProperties": false
        },
        "http-transceiver": {
            "type": "object",
            "properties": {
                "type": {
                    "const": "http"
                },
                "payload": {
                    "oneOf": [
                        { "$ref": "#/$defs/http-request" },
                        { "$ref": "#/$defs/http-response" }
                    ]
                }
            },
            "required": ["type", "payload"],
            "additionalProperties": false
        },
        "apdu-request": {
            "type": "object",
            "description": "APDU command request",
            "properties": {
                "func": {
                    "enum": [
                        "connect",
                        "disconnect",
                        "logic_channel_open",
                        "logic_channel_close",
                        "transmit"
                    ],
                    "description": "APDU function to be executed"
                },
                "param": {
                    "type": "string",
                    "description": "APDU command parameters, hexadecimal encoded"
                }
            },
            "required": ["func", "param"],
            "additionalProperties": false
        },
        "apdu-response": {
            "type": "object",
            "description": "APDU command response",
            "properties": {
                "ecode": {
                    "type": "integer",
                    "description": "Execution result code"
                },
                "data": {
                    "type": "string",
                    "description": "Response data, hexadecimal encoded"
                }
            },
            "required": ["ecode"],
            "additionalProperties": false
        },
        "http-request": {
            "type": "object",
            "description": "HTTP Request",
            "properties": {
                "url": {
                    "type": "string",
                    "format": "url",
                    "description": "HTTP Request URL"
                },
                "tx": {
                    "type": "string",
                    "description": "HTTP Request Body, hexadecimal encoded"
                },
                "headers": {
                    "type": "array",
                    "items": {
                        "type": "string",
                        "description": "HTTP Header in 'Key: Value' format"
                    },
                    "description": "HTTP Request Headers"
                }
            },
            "required": ["url", "tx", "headers"],
            "additionalProperties": false
        },
        "http-response": {
            "type": "object",
            "description": "HTTP Response",
            "properties": {
                "rcode": {
                    "type": "integer",
                    "description": "HTTP Response Code"
                },
                "rx": {
                    "type": "string",
                    "description": "HTTP Response Body, hexadecimal encoded"
                }
            },
            "required": ["rcode", "rx"],
            "additionalProperties": false
        }
    }
}