/*
 *******************************************************************************
 * Copyright (C) 2004-2011, International Business Machines Corporation and    *
 * others. All Rights Reserved.                                                *
 *******************************************************************************
 */
package com.ibm.icu.impl;

import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Set;
import java.util.TreeSet;

import com.ibm.icu.util.UResourceBundle;
import com.ibm.icu.util.UResourceBundleIterator;
import com.ibm.icu.util.UResourceTypeMismatchException;

class ICUResourceBundleImpl extends ICUResourceBundle {
    protected ICUResourceBundleImpl(ICUResourceBundleReader reader, String key, String resPath, int resource,
                                    ICUResourceBundleImpl container) {
        super(reader, key, resPath, resource, container);
    }
    protected final ICUResourceBundle createBundleObject(String _key,
                                                         int _resource,
                                                         HashMap<String, String> table,
                                                         UResourceBundle requested,
                                                         boolean[] isAlias) {
        if (isAlias != null) {
            isAlias[0] = false;
        }
        String _resPath = resPath + "/" + _key;
        switch(ICUResourceBundleReader.RES_GET_TYPE(_resource)) {
        case STRING :
        case STRING_V2:
            return new ICUResourceBundleImpl.ResourceString(reader, _key, _resPath, _resource, this);
        case BINARY:
            return new ICUResourceBundleImpl.ResourceBinary(reader, _key, _resPath, _resource, this);
        case ALIAS:
            if (isAlias != null) {
                isAlias[0] = true;
            }
            return findResource(_key, _resPath, _resource, table, requested);
        case INT:
            return new ICUResourceBundleImpl.ResourceInt(reader, _key, _resPath, _resource, this);
        case INT_VECTOR:
            return new ICUResourceBundleImpl.ResourceIntVector(reader, _key, _resPath, _resource, this);
        case ARRAY:
        case ARRAY16:
            return new ICUResourceBundleImpl.ResourceArray(reader, _key, _resPath, _resource, this);
        case TABLE:
        case TABLE16:
        case TABLE32:
            return new ICUResourceBundleImpl.ResourceTable(reader, _key, _resPath, _resource, this);
        default :
            throw new IllegalStateException("The resource type is unknown");
        }
    }

    // Scalar values ------------------------------------------------------- ***

    private static final class ResourceBinary extends ICUResourceBundleImpl {
        public ByteBuffer getBinary() {
            return reader.getBinary(resource);
        }
        public byte [] getBinary(byte []ba) {
            return reader.getBinary(resource, ba);
        }
        ResourceBinary(ICUResourceBundleReader reader, String key, String resPath, int resource,
                       ICUResourceBundleImpl container) {
            super(reader, key, resPath, resource, container);
        }
    }
    private static final class ResourceInt extends ICUResourceBundleImpl {
        public int getInt() {
            return ICUResourceBundleReader.RES_GET_INT(resource);
        }
        public int getUInt() {
            return ICUResourceBundleReader.RES_GET_UINT(resource);
        }
        ResourceInt(ICUResourceBundleReader reader, String key, String resPath, int resource,
                    ICUResourceBundleImpl container) {
            super(reader, key, resPath, resource, container);
        }
    }
    private static final class ResourceString extends ICUResourceBundleImpl {
        private String value;
        public String getString() {
            return value;
        }
        ResourceString(ICUResourceBundleReader reader, String key, String resPath, int resource,
                       ICUResourceBundleImpl container) {
            super(reader, key, resPath, resource, container);
            value = reader.getString(resource);
        }
    }
    private static final class ResourceIntVector extends ICUResourceBundleImpl {
        private int[] value;
        public int[] getIntVector() {
            return value;
        }
        ResourceIntVector(ICUResourceBundleReader reader, String key, String resPath, int resource,
                          ICUResourceBundleImpl container) {
            super(reader, key, resPath, resource, container);
            value = reader.getIntVector(resource);
        }
    }

    // Container values ---------------------------------------------------- ***

    private static class ResourceContainer extends ICUResourceBundleImpl {
        protected ICUResourceBundleReader.Container value;

        public int getSize() {
            return value.getSize();
        }
        protected int getContainerResource(int index) {
            return value.getContainerResource(index);
        }
        protected UResourceBundle createBundleObject(int index, String resKey, HashMap<String, String> table,
                                                     UResourceBundle requested, boolean[] isAlias) {
            int item = getContainerResource(index);
            if (item == RES_BOGUS) {
                throw new IndexOutOfBoundsException();
            }
            return createBundleObject(resKey, item, table, requested, isAlias);
        }
        ResourceContainer(ICUResourceBundleReader reader, String key, String resPath, int resource,
                          ICUResourceBundleImpl container) {
            super(reader, key, resPath, resource, container);
        }
    }
    private static class ResourceArray extends ResourceContainer {
        protected String[] handleGetStringArray() {
            String[] strings = new String[value.getSize()];
            UResourceBundleIterator iter = getIterator();
            int i = 0;
            while (iter.hasNext()) {
                strings[i++] = iter.next().getString();
            }
            return strings;
        }
        public String[] getStringArray() {
            return handleGetStringArray();
        }
        protected UResourceBundle handleGetImpl(String indexStr, HashMap<String, String> table,
                                                UResourceBundle requested,
                                                int[] index, boolean[] isAlias) {
            int i = indexStr.length() > 0 ? Integer.valueOf(indexStr).intValue() : -1;
            if(index != null) {
                index[0] = i;
            }
            if (i < 0) {
                throw new UResourceTypeMismatchException("Could not get the correct value for index: "+ Arrays.toString(index));
            }
            return createBundleObject(i, indexStr, table, requested, isAlias);
        }
        protected UResourceBundle handleGetImpl(int index, HashMap<String, String> table,
                                                UResourceBundle requested, boolean[] isAlias) {
            return createBundleObject(index, Integer.toString(index), table, requested, isAlias);
        }
        ResourceArray(ICUResourceBundleReader reader, String key, String resPath, int resource,
                      ICUResourceBundleImpl container) {
            super(reader, key, resPath, resource, container);
            value = reader.getArray(resource);
            createLookupCache(); // Use bundle cache to access array entries
        }
    }
    static class ResourceTable extends ResourceContainer {
        protected String getKey(int index) {
            return ((ICUResourceBundleReader.Table)value).getKey(index);
        }
        protected Set<String> handleKeySet() {
            TreeSet<String> keySet = new TreeSet<String>();
            ICUResourceBundleReader.Table table = (ICUResourceBundleReader.Table)value;
            for (int i = 0; i < table.getSize(); ++i) {
                keySet.add(table.getKey(i));
            }
            return keySet;
        }
        protected int getTableResource(String resKey) {
            return ((ICUResourceBundleReader.Table)value).getTableResource(resKey);
        }
        protected int getTableResource(int index) {
            return getContainerResource(index);
        }
        protected UResourceBundle handleGetImpl(String resKey, HashMap<String, String> table,
                                                UResourceBundle requested,
                                                int[] index, boolean[] isAlias) {
            int i = ((ICUResourceBundleReader.Table)value).findTableItem(resKey);
            if(index != null) {
                index[0] = i;
            }
            if (i < 0) {
                return null;
            }
            return createBundleObject(i, resKey, table, requested, isAlias);
        }
        protected UResourceBundle handleGetImpl(int index, HashMap<String, String> table,
                                                UResourceBundle requested, boolean[] isAlias) {
            String itemKey = ((ICUResourceBundleReader.Table)value).getKey(index);
            if (itemKey == null) {
                throw new IndexOutOfBoundsException();
            }
            return createBundleObject(index, itemKey, table, requested, isAlias);
        }
        ResourceTable(ICUResourceBundleReader reader, String key, String resPath, int resource,
                      ICUResourceBundleImpl container) {
            super(reader, key, resPath, resource, container);
            value = reader.getTable(resource);
            createLookupCache(); // Use bundle cache to access table entries
        }
    }
}