// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-

const Gio = imports.gi.Gio;
const Lang = imports.lang;
const Shell = imports.gi.Shell;
const Signals = imports.signals;

// The following are not the complete interfaces, just the methods we need
// (or may need in the future)

const ModemGsmNetworkInterface = <interface name="org.freedesktop.ModemManager.Modem.Gsm.Network">
<method name="GetRegistrationInfo">
    <arg type="(uss)" direction="out" />
</method>
<method name="GetSignalQuality">
    <arg type="u" direction="out" />
</method>
<property name="AccessTechnology" type="u" access="read" />
<signal name="SignalQuality">
    <arg type="u" direction="out" />
</signal>
<signal name="RegistrationInfo">
    <arg type="u" direction="out" />
    <arg type="s" direction="out" />
    <arg type="s" direction="out" />
</signal>
</interface>;

const ModemGsmNetworkProxy = Gio.DBusProxy.makeProxyWrapper(ModemGsmNetworkInterface);

const ModemCdmaInterface = <interface name="org.freedesktop.ModemManager.Modem.Cdma">
<method name="GetSignalQuality">
    <arg type="u" direction="out" />
</method>
<method name="GetServingSystem">
    <arg type="(usu)" direction="out" />
</method>
<signal name="SignalQuality">
    <arg type="u" direction="out" />
</signal>
</interface>;

const ModemCdmaProxy = Gio.DBusProxy.makeProxyWrapper(ModemCdmaInterface);

let _providersTable;
function _getProvidersTable() {
    if (_providersTable)
        return _providersTable;
    return _providersTable = Shell.mobile_providers_parse(null,null);
}

function findProviderForMCCMNC(table, needle) {
    let needlemcc = needle.substring(0, 3);
    let needlemnc = needle.substring(3, needle.length);

    let name2, name3;
    for (let iter in table) {
        let country = table[iter];
        let providers = country.get_providers();

        // Search through each country's providers
        for (let i = 0; i < providers.length; i++) {
            let provider = providers[i];

            // Search through MCC/MNC list
            let list = provider.get_gsm_mcc_mnc();
            for (let j = 0; j < list.length; j++) {
                let mccmnc = list[j];

                // Match both 2-digit and 3-digit MNC; prefer a
                // 3-digit match if found, otherwise a 2-digit one.
                if (mccmnc.mcc != needlemcc)
                    continue;  // MCC was wrong

                if (!name3 && needle.length == 6 && needlemnc == mccmnc.mnc)
                    name3 = provider.name;

                if (!name2 && needlemnc.substring(0, 2) == mccmnc.mnc.substring(0, 2))
                    name2 = provider.name;

                if (name2 && name3)
                    break;
            }
        }
    }

    return name3 || name2 || null;
}

function findProviderForSid(table, sid) {
    if (sid == 0)
        return null;

    // Search through each country
    for (let iter in table) {
        let country = table[iter];
        let providers = country.get_providers();

        // Search through each country's providers
        for (let i = 0; i < providers.length; i++) {
            let provider = providers[i];
            let cdma_sid = provider.get_cdma_sid();

            // Search through CDMA SID list
            for (let j = 0; j < cdma_sid.length; j++) {
                if (cdma_sid[j] == sid)
                    return provider.name;
            }
        }
    }

    return null;
}

const ModemGsm = new Lang.Class({
    Name: 'ModemGsm',

    _init: function(path) {
        this._proxy = new ModemGsmNetworkProxy(Gio.DBus.system, 'org.freedesktop.ModemManager', path);

        this.signal_quality = 0;
        this.operator_name = null;

        // Code is duplicated because the function have different signatures
        this._proxy.connectSignal('SignalQuality', Lang.bind(this, function(proxy, sender, [quality]) {
            this.signal_quality = quality;
            this.emit('notify::signal-quality');
        }));
        this._proxy.connectSignal('RegistrationInfo', Lang.bind(this, function(proxy, sender, [status, code, name]) {
            this.operator_name = this._findOperatorName(name, code);
            this.emit('notify::operator-name');
        }));
        this._proxy.GetRegistrationInfoRemote(Lang.bind(this, function([result], err) {
            if (err) {
                log(err);
                return;
            }

            let [status, code, name] = result;
            this.operator_name = this._findOperatorName(name, code);
            this.emit('notify::operator-name');
        }));
        this._proxy.GetSignalQualityRemote(Lang.bind(this, function(result, err) {
            if (err) {
                // it will return an error if the device is not connected
                this.signal_quality = 0;
            } else {
                let [quality] = result;
                this.signal_quality = quality;
            }
            this.emit('notify::signal-quality');
        }));
    },

    _findOperatorName: function(name, opCode) {
        if (name) {
            if (name && name.length != 0 && (name.length > 6 || name.length < 5)) {
                // this looks like a valid name, i.e. not an MCCMNC (that some
                // devices return when not yet connected
                return name;
            }
            if (isNaN(parseInt(name))) {
                // name is definitely not a MCCMNC, so it may be a name
                // after all; return that
                return name;
            }
        }

        let needle;
        if ((name == null || name.length == 0) && opCode)
            needle = opCode;
        else if (name.length == 6 || name.length == 5)
            needle = name;
        else // nothing to search
            return null;

        let table = _getProvidersTable();
        return findProviderForMCCMNC(table, needle);
    }
});
Signals.addSignalMethods(ModemGsm.prototype);

const ModemCdma = new Lang.Class({
    Name: 'ModemCdma',

    _init: function(path) {
        this._proxy = new ModemCdmaProxy(Gio.DBus.system, 'org.freedesktop.ModemManager', path);

        this.signal_quality = 0;
        this.operator_name = null;
        this._proxy.connectSignal('SignalQuality', Lang.bind(this, function(proxy, sender, params) {
            this.signal_quality = params[0];
            this.emit('notify::signal-quality');

            // receiving this signal means the device got activated
            // and we can finally call GetServingSystem
            if (this.operator_name == null)
                this._refreshServingSystem();
        }));
        this._proxy.GetSignalQualityRemote(Lang.bind(this, function(result, err) {
            if (err) {
                // it will return an error if the device is not connected
                this.signal_quality = 0;
            } else {
                let [quality] = result;
                this.signal_quality = quality;
            }
            this.emit('notify::signal-quality');
        }));
    },

    _refreshServingSystem: function() {
        this._proxy.GetServingSystemRemote(Lang.bind(this, function([result], err) {
            if (err) {
                // it will return an error if the device is not connected
                this.operator_name = null;
            } else {
                let [bandClass, band, id] = result;
                if (name.length > 0) {
                    let table = _getProvidersTable();
                    this.operator_name = findProviderForSid(table, id);
                } else
                    this.operator_name = null;
            }
            this.emit('notify::operator-name');
        }));
    }
});
Signals.addSignalMethods(ModemCdma.prototype);