//
// Copyright (c) ZeroC, Inc. All rights reserved.
//

const Ice = require("../Ice/ModuleRegistry").Ice;
Ice._ModuleRegistry.require(module,
    [
        "../Ice/HashMap",
        "../Ice/LocatorInfo",
        "../Ice/LocatorTable",
        "../Ice/Locator"
    ]);

const HashMap = Ice.HashMap;
const LocatorInfo = Ice.LocatorInfo;
const LocatorTable = Ice.LocatorTable;
const LocatorPrx = Ice.LocatorPrx;

class LocatorManager
{
    constructor(properties)
    {
        this._background = properties.getPropertyAsInt("Ice.BackgroundLocatorCacheUpdates") > 0;
        this._table = new HashMap(HashMap.compareEquals); // Map<Ice.LocatorPrx, LocatorInfo>
        this._locatorTables = new HashMap(HashMap.compareEquals); // Map<Ice.Identity, LocatorTable>
    }

    destroy()
    {
        for(const locator of this._table.values())
        {
            locator.destroy();
        }
        this._table.clear();
        this._locatorTables.clear();
    }

    //
    // Returns locator info for a given locator. Automatically creates
    // the locator info if it doesn't exist yet.
    //
    find(loc)
    {
        if(loc === null)
        {
            return null;
        }

        //
        // The locator can't be located.
        //
        const locator = LocatorPrx.uncheckedCast(loc.ice_locator(null));

        //
        // TODO: reap unused locator info objects?
        //
        let info = this._table.get(locator);
        if(info === undefined)
        {
            //
            // Rely on locator identity for the adapter table. We want to
            // have only one table per locator (not one per locator
            // proxy).
            //
            let table = this._locatorTables.get(locator.ice_getIdentity());
            if(table === undefined)
            {
                table = new LocatorTable();
                this._locatorTables.set(locator.ice_getIdentity(), table);
            }

            info = new LocatorInfo(locator, table, this._background);
            this._table.set(locator, info);
        }

        return info;
    }
}

Ice.LocatorManager = LocatorManager;
module.exports.Ice = Ice;
