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/*
 * Copyright 2010 the original author or authors.
 *
 * Licensed 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.
 */
package org.gradle.integtests;

import org.gradle.openapi.external.ui.SettingsNodeVersion1;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

/**
 * Implementation of settings node. It basically mirrors a DOM.
 */
public class TestSettingsNodeVersion1 implements SettingsNodeVersion1 {

    private String name;
    private String value;
    private HashMap attributes = new HashMap();
    private SettingsNodeVersion1 parent;
    private List children = new ArrayList();

    public TestSettingsNodeVersion1() {
        //this creates a root settings node.
    }

    public TestSettingsNodeVersion1(SettingsNodeVersion1 parent) {
        this.parent = parent;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setValue(String value) {
        this.value = value;
    }

    public String getValue() {
        return value;
    }

    public void setValueOfChild(String name, String value) {
        SettingsNodeVersion1 settingsNode = addChildIfNotPresent(name);
        settingsNode.setValue(value);
    }

    public String getValueOfChild(String name, String defaultValue) {
        SettingsNodeVersion1 settingsNode = getChildNode(name);
        if (settingsNode != null) {
            String value = settingsNode.getValue();
            if (value != null) {
                return value;
            }
        }
        return defaultValue;
    }

    public SettingsNodeVersion1 getChildNode(String name) {
        Iterator iterator = children.iterator();
        while (iterator.hasNext()) {
            SettingsNodeVersion1 childNode = iterator.next();
            if (name.equals(childNode.getName())) {
                return childNode;
            }
        }
        return null;
    }

    public List getChildNodes() {
        return children;
    }

    public List getChildNodes(String name) {
        List children = new ArrayList();

        Iterator iterator = children.iterator();
        while (iterator.hasNext()) {
            SettingsNodeVersion1 childNode = iterator.next();
            if (name.equals(childNode.getName())) {
                children.add(childNode);
            }
        }

        return children;
    }

    public int getValueOfChildAsInt(String name, int defaultValue) {
        SettingsNodeVersion1 settingsNode = getChildNode(name);
        if (settingsNode != null) {
            String value = settingsNode.getValue();

            try {
                if (value != null) {
                    return Integer.parseInt(value);
                }
            } catch (NumberFormatException e) {
                //we couldn't parse it. Just return the default.
            }
        }
        return defaultValue;
    }

    public void setValueOfChildAsInt(String name, int value) {
        setValueOfChild(name, Integer.toString(value));
    }

    public long getValueOfChildAsLong(String name, long defaultValue) {
        SettingsNodeVersion1 settingsNode = getChildNode(name);
        if (settingsNode != null) {
            String value = settingsNode.getValue();

            try {
                if (value != null) {
                    return Long.parseLong(value);
                }
            } catch (NumberFormatException e) {
                //we couldn't parse it. Just return the default.
            }
        }
        return defaultValue;
    }

    public void setValueOfChildAsLong(String name, long value) {
        setValueOfChild(name, Long.toString(value));
    }

    public boolean getValueOfChildAsBoolean(String name, boolean defaultValue) {
        SettingsNodeVersion1 settingsNode = getChildNode(name);
        if (settingsNode != null) {
            String value = settingsNode.getValue();

            //I'm not calling 'Boolean.parseBoolean( value )' because it will return false if the value isn't true/false
            //and we want it to return whatever the default is if its not a boolean.
            if (value != null) {
                if ("true".equalsIgnoreCase(value)) {
                    return true;
                }

                if ("false".equalsIgnoreCase(value)) {
                    return false;
                }
            }
        }

        return defaultValue;
    }

    public void setValueOfChildAsBoolean(String name, boolean value) {
        setValueOfChild(name, Boolean.toString(value));
    }

    public SettingsNodeVersion1 addChild(String name) {
        SettingsNodeVersion1 childNode = new TestSettingsNodeVersion1(this);
        childNode.setName(name);

        children.add(childNode);
        return childNode;
    }

    public SettingsNodeVersion1 addChildIfNotPresent(String name) {
        SettingsNodeVersion1 settingsNode = getChildNode(name);
        if (settingsNode == null) {
            settingsNode = addChild(name);
        }

        return settingsNode;
    }

    public SettingsNodeVersion1 getNodeAtPath(String... pathPortions) {
        if (pathPortions == null || pathPortions.length == 0) {
            return null;
        }

        String firstPathPortion = pathPortions[0];

        SettingsNodeVersion1 currentNode = getChildNode(firstPathPortion);

        int index = 1; //Skip the first one. we've already used that one.
        while (index < pathPortions.length && currentNode != null) {
            String pathPortion = pathPortions[index];
            currentNode = currentNode.getChildNode(pathPortion);
            index++;
        }

        return currentNode;
    }

    private SettingsNodeVersion1 getNodeAtPathCreateIfNotFound(String... pathPortions) {
        if (pathPortions == null || pathPortions.length == 0) {
            return null;
        }

        String firstPathPortion = pathPortions[0];

        SettingsNodeVersion1 currentNode = getChildNode(firstPathPortion);
        if (currentNode == null) {
            currentNode = addChild(firstPathPortion);
        }

        int index = 1;
        while (index < pathPortions.length) {
            String pathPortion = pathPortions[index];
            currentNode = currentNode.getChildNode(pathPortion);
            if (currentNode == null) {
                currentNode = addChild(firstPathPortion);
            }

            index++;
        }

        return currentNode;
    }

    public void removeFromParent() {
        ((TestSettingsNodeVersion1) this.parent).children.remove(this);
        this.parent = null;
    }

    public void removeAllChildren() {
        children.clear();
    }

    @Override
    public String toString() {
        return getName() + "='" + getValue() + "' " + children.size() + " children";
    }
}