// Décodeur LoRaWAN officiel : EM300-MCS - Contact Sensor (Milesight)
// Source : https://github.com/TheThingsNetwork/lorawan-devices/blob/master/vendor/milesight-iot/em300-mcs.js
// The Things Network Device Repository, fichier publié par le constructeur, distribué sans modification.
// Format : decodeUplink(input) (TTN v3 / ChirpStack v4). Hébergé par smartbuildings.fr.

/**
 * Payload Decoder
 *
 * Copyright 2025 Milesight IoT
 *
 * @product EM300-MCS
 */
var RAW_VALUE = 0x00;

/* eslint no-redeclare: "off" */
/* eslint-disable */
// Chirpstack v4
function decodeUplink(input) {
    var decoded = milesightDeviceDecode(input.bytes);
    return { data: decoded };
}

// Chirpstack v3
function Decode(fPort, bytes) {
    return milesightDeviceDecode(bytes);
}

// The Things Network
function Decoder(bytes, port) {
    return milesightDeviceDecode(bytes);
}
/* eslint-enable */

function milesightDeviceDecode(bytes) {
    var decoded = {};

    for (var i = 0; i < bytes.length; ) {
        var channel_id = bytes[i++];
        var channel_type = bytes[i++];

        // IPSO VERSION
        if (channel_id === 0xff && channel_type === 0x01) {
            decoded.ipso_version = readProtocolVersion(bytes[i]);
            i += 1;
        }
        // HARDWARE VERSION
        else if (channel_id === 0xff && channel_type === 0x09) {
            decoded.hardware_version = readHardwareVersion(bytes.slice(i, i + 2));
            i += 2;
        }
        // FIRMWARE VERSION
        else if (channel_id === 0xff && channel_type === 0x0a) {
            decoded.firmware_version = readFirmwareVersion(bytes.slice(i, i + 2));
            i += 2;
        }
        // TSL VERSION
        else if (channel_id === 0xff && channel_type === 0xff) {
            decoded.tsl_version = readTslVersion(bytes.slice(i, i + 2));
            i += 2;
        }
        // SERIAL NUMBER
        else if (channel_id === 0xff && channel_type === 0x16) {
            decoded.sn = readSerialNumber(bytes.slice(i, i + 8));
            i += 8;
        }
        // LORAWAN CLASS TYPE
        else if (channel_id === 0xff && channel_type === 0x0f) {
            decoded.lorawan_class = readLoRaWANClass(bytes[i]);
            i += 1;
        }
        // RESET EVENT
        else if (channel_id === 0xff && channel_type === 0xfe) {
            decoded.reset_event = readResetEvent(1);
            i += 1;
        }
        // DEVICE STATUS
        else if (channel_id === 0xff && channel_type === 0x0b) {
            decoded.device_status = readDeviceStatus(1);
            i += 1;
        }

        // BATTERY
        else if (channel_id === 0x01 && channel_type === 0x75) {
            decoded.battery = readUInt8(bytes[i]);
            i += 1;
        }
        // TEMPERATURE
        else if (channel_id === 0x03 && channel_type === 0x67) {
            decoded.temperature = readInt16LE(bytes.slice(i, i + 2)) / 10;
            i += 2;
        }
        // HUMIDITY
        else if (channel_id === 0x04 && channel_type === 0x68) {
            decoded.humidity = readUInt8(bytes[i]) / 2;
            i += 1;
        }
        // MAGNET STATUS
        else if (channel_id === 0x06 && channel_type === 0x00) {
            decoded.magnet_status = readMagnetStatus(bytes[i]);
            i += 1;
        }
        // HISTORY DATA
        else if (channel_id === 0x20 && channel_type === 0xce) {
            var point = {};
            point.timestamp = readUInt32LE(bytes.slice(i, i + 4));
            point.temperature = readInt16LE(bytes.slice(i + 4, i + 6)) / 10;
            point.humidity = readUInt8(bytes[i + 6]) / 2;
            point.magnet_status = readMagnetStatus(bytes[i + 7]);
            i += 8;
            decoded.history = decoded.history || [];
            decoded.history.push(point);
        }
        // DOWNLINK RESPONSE
        else if (channel_id === 0xfe || channel_id === 0xff) {
            var result = handle_downlink_response(channel_type, bytes, i);
            decoded = Object.assign(decoded, result.data);
            i = result.offset;
        } else {
            break;
        }
    }

    return decoded;
}

function handle_downlink_response(channel_type, bytes, offset) {
    var decoded = {};

    switch (channel_type) {
        case 0x02:
            decoded.collection_interval = readUInt16LE(bytes.slice(offset, offset + 2));
            offset += 2;
            break;
        case 0x03:
            decoded.report_interval = readUInt16LE(bytes.slice(offset, offset + 2));
            offset += 2;
            break;
        case 0x06:
            var data = readUInt8(bytes[offset]);
            var channel = (data >>> 3) & 0x07;
            var value = data & 0x07;
            if (channel === 0x01) {
                decoded.temperature_alarm_config = {};
                decoded.temperature_alarm_config.condition = readConditionType(value);
                decoded.temperature_alarm_config.threshold_min = readInt16LE(bytes.slice(offset + 1, offset + 3)) / 10;
                decoded.temperature_alarm_config.threshold_max = readInt16LE(bytes.slice(offset + 3, offset + 5)) / 10;
            } else if (channel === 0x02) {
                decoded.magnet_alarm_config = {};
                decoded.magnet_alarm_config.enable = readEnableStatus(value);
                // skip 4 bytes
                decoded.magnet_alarm_config.report_interval = readUInt16LE(bytes.slice(offset + 5, offset + 7));
                decoded.magnet_alarm_config.report_times = readUInt16LE(bytes.slice(offset + 7, offset + 9));
            }
            offset += 9;
            break;
        case 0x10:
            decoded.reboot = readYesNoStatus(1);
            offset += 1;
            break;
        case 0x27:
            decoded.clear_history = readYesNoStatus(1);
            offset += 1;
            break;
        case 0x28:
            decoded.report_status = readYesNoStatus(1);
            offset += 1;
            break;
        case 0x68:
            decoded.history_enable = readEnableStatus(bytes[offset]);
            offset += 1;
            break;
        case 0x69:
            decoded.retransmit_enable = readEnableStatus(bytes[offset]);
            offset += 1;
            break;
        case 0x6a:
            var interval_type = readUInt8(bytes[offset]);
            switch (interval_type) {
                case 0:
                    decoded.retransmit_interval = readUInt16LE(bytes.slice(offset + 1, offset + 3));
                    break;
                case 1:
                    decoded.resend_interval = readUInt16LE(bytes.slice(offset + 1, offset + 3));
                    break;
            }
            offset += 3;
            break;
        case 0x6d:
            decoded.stop_transmit = readYesNoStatus(1);
            offset += 1;
            break;
        case 0x79:
            var d2d_master_config = {};
            d2d_master_config.mode = readD2DMode(bytes[offset]);
            d2d_master_config.report_type = readD2DReportType(bytes[offset + 1]);
            d2d_master_config.d2d_cmd = readD2DCommand(bytes.slice(offset + 2, offset + 6));
            offset += 6;
            decoded.d2d_master_config = decoded.d2d_master_config || [];
            decoded.d2d_master_config.push(d2d_master_config);
            break;
        case 0xea:
            var data = readUInt8(bytes[offset]);
            var channel = data & 0x03;
            var enable_value = (data >>> 7) & 0x01;
            if (channel === 0x00) {
                decoded.temperature_calibration_settings = {};
                decoded.temperature_calibration_settings.enable = readEnableStatus(enable_value);
                decoded.temperature_calibration_settings.calibration_value = readInt16LE(bytes.slice(offset + 1, offset + 3)) / 10;
            } else if (channel === 0x01) {
                decoded.humidity_calibration_settings = {};
                decoded.humidity_calibration_settings.enable = readEnableStatus(enable_value);
                decoded.humidity_calibration_settings.calibration_value = readInt16LE(bytes.slice(offset + 1, offset + 3)) / 2;
            }
            offset += 3;
            break;
        default:
            throw new Error("unknown downlink response");
    }

    return { data: decoded, offset: offset };
}

function readProtocolVersion(bytes) {
    var major = (bytes & 0xf0) >> 4;
    var minor = bytes & 0x0f;
    return "v" + major + "." + minor;
}

function readHardwareVersion(bytes) {
    var major = (bytes[0] & 0xff).toString(16);
    var minor = (bytes[1] & 0xff) >> 4;
    return "v" + major + "." + minor;
}

function readFirmwareVersion(bytes) {
    var major = (bytes[0] & 0xff).toString(16);
    var minor = (bytes[1] & 0xff).toString(16);
    return "v" + major + "." + minor;
}

function readTslVersion(bytes) {
    var major = bytes[0] & 0xff;
    var minor = bytes[1] & 0xff;
    return "v" + major + "." + minor;
}

function readSerialNumber(bytes) {
    var temp = [];
    for (var idx = 0; idx < bytes.length; idx++) {
        temp.push(("0" + (bytes[idx] & 0xff).toString(16)).slice(-2));
    }
    return temp.join("");
}

function readLoRaWANClass(type) {
    var class_map = {
        0: "Class A",
        1: "Class B",
        2: "Class C",
        3: "Class CtoB",
    };
    return getValue(class_map, type);
}

function readResetEvent(status) {
    var status_map = { 0: "normal", 1: "reset" };
    return getValue(status_map, status);
}

function readDeviceStatus(status) {
    var status_map = { 0: "off", 1: "on" };
    return getValue(status_map, status);
}

function readMagnetStatus(status) {
    var status_map = { 0: "close", 1: "open" };
    return getValue(status_map, status);
}

function readYesNoStatus(status) {
    var status_map = { 0: "no", 1: "yes" };
    return getValue(status_map, status);
}

function readEnableStatus(status) {
    var status_map = { 0: "disable", 1: "enable" };
    return getValue(status_map, status);
}

function readConditionType(condition) {
    var condition_map = { 0: "disable", 1: "below", 2: "above", 3: "between", 4: "outside" };
    return getValue(condition_map, condition);
}

function readD2DMode(mode) {
    var mode_map = { 1: "temperature_alarm", 2: "temperature_alarm_release", 3: "magnet_status_alarm", 4: "magnet_status_alarm_release" };
    return getValue(mode_map, mode);
}

function readD2DReportType(type) {
    var type_map = { 0: "lora", 1: "d2d", 3: "d2d_and_lora" };
    return getValue(type_map, type);
}

/* eslint-disable */
function readUInt8(bytes) {
    return bytes & 0xff;
}

function readInt8(bytes) {
    var ref = readUInt8(bytes);
    return ref > 0x7f ? ref - 0x100 : ref;
}

function readUInt16LE(bytes) {
    var value = (bytes[1] << 8) + bytes[0];
    return value & 0xffff;
}

function readInt16LE(bytes) {
    var ref = readUInt16LE(bytes);
    return ref > 0x7fff ? ref - 0x10000 : ref;
}

function readUInt32LE(bytes) {
    var value = (bytes[3] << 24) + (bytes[2] << 16) + (bytes[1] << 8) + bytes[0];
    return value & 0xffffffff;
}

function readD2DCommand(bytes) {
    return ("0" + (bytes[1] & 0xff).toString(16)).slice(-2) + ("0" + (bytes[0] & 0xff).toString(16)).slice(-2);
}

function getValue(map, key) {
    if (RAW_VALUE) return key;

    var value = map[key];
    if (!value) value = "unknown";
    return value;
}

//if (!Object.assign) {
    Object.defineProperty(Object, "assign", {
        enumerable: false,
        configurable: true,
        writable: true,
        value: function (target) {
            "use strict";
            if (target == null) {
                throw new TypeError("Cannot convert first argument to object");
            }

            var to = Object(target);
            for (var i = 1; i < arguments.length; i++) {
                var nextSource = arguments[i];
                if (nextSource == null) {
                    continue;
                }
                nextSource = Object(nextSource);

                var keysArray = Object.keys(Object(nextSource));
                for (var nextIndex = 0, len = keysArray.length; nextIndex < len; nextIndex++) {
                    var nextKey = keysArray[nextIndex];
                    var desc = Object.getOwnPropertyDescriptor(nextSource, nextKey);
                    if (desc !== undefined && desc.enumerable) {
                        // concat array
                        if (Array.isArray(to[nextKey]) && Array.isArray(nextSource[nextKey])) {
                            to[nextKey] = to[nextKey].concat(nextSource[nextKey]);
                        } else {
                            to[nextKey] = nextSource[nextKey];
                        }
                    }
                }
            }
            return to;
        },
    });
//}