/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
*/

var builder = require('cordova/builder'),
    moduleMap = define.moduleMap,
    symbolList,
    deprecationMap;

exports.reset = function() {
    symbolList = [];
    deprecationMap = {};
};

function addEntry(strategy, moduleName, symbolPath, opt_deprecationMessage) {
    if (!(moduleName in moduleMap)) {
        throw new Error('Module ' + moduleName + ' does not exist.');
    }
    symbolList.push(strategy, moduleName, symbolPath);
    if (opt_deprecationMessage) {
        deprecationMap[symbolPath] = opt_deprecationMessage;
    }
}

// Note: Android 2.3 does have Function.bind().
exports.clobbers = function(moduleName, symbolPath, opt_deprecationMessage) {
    addEntry('c', moduleName, symbolPath, opt_deprecationMessage);
};

exports.merges = function(moduleName, symbolPath, opt_deprecationMessage) {
    addEntry('m', moduleName, symbolPath, opt_deprecationMessage);
};

exports.defaults = function(moduleName, symbolPath, opt_deprecationMessage) {
    addEntry('d', moduleName, symbolPath, opt_deprecationMessage);
};

exports.runs = function(moduleName) {
    addEntry('r', moduleName, null);
};

function prepareNamespace(symbolPath, context) {
    if (!symbolPath) {
        return context;
    }
    var parts = symbolPath.split('.');
    var cur = context;
    for (var i = 0, part; part = parts[i]; ++i) {
        cur = cur[part] = cur[part] || {};
    }
    return cur;
}

exports.mapModules = function(context) {
    var origSymbols = {};
    context.CDV_origSymbols = origSymbols;
    for (var i = 0, len = symbolList.length; i < len; i += 3) {
        var strategy = symbolList[i];
        var moduleName = symbolList[i + 1];
        var module = require(moduleName);
        // <runs/>
        if (strategy == 'r') {
            continue;
        }
        var symbolPath = symbolList[i + 2];
        var lastDot = symbolPath.lastIndexOf('.');
        var namespace = symbolPath.substr(0, lastDot);
        var lastName = symbolPath.substr(lastDot + 1);

        var deprecationMsg = symbolPath in deprecationMap ? 'Access made to deprecated symbol: ' + symbolPath + '. ' + deprecationMsg : null;
        var parentObj = prepareNamespace(namespace, context);
        var target = parentObj[lastName];

        if (strategy == 'm' && target) {
            builder.recursiveMerge(target, module);
        } else if ((strategy == 'd' && !target) || (strategy != 'd')) {
            if (!(symbolPath in origSymbols)) {
                origSymbols[symbolPath] = target;
            }
            builder.assignOrWrapInDeprecateGetter(parentObj, lastName, module, deprecationMsg);
        }
    }
};

exports.getOriginalSymbol = function(context, symbolPath) {
    var origSymbols = context.CDV_origSymbols;
    if (origSymbols && (symbolPath in origSymbols)) {
        return origSymbols[symbolPath];
    }
    var parts = symbolPath.split('.');
    var obj = context;
    for (var i = 0; i < parts.length; ++i) {
        obj = obj && obj[parts[i]];
    }
    return obj;
};

exports.reset();