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/*
 *  Copyright (C) 2022 github.com/REAndroid
 *
 *  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 com.reandroid.arsc.chunk;

import com.reandroid.arsc.container.BlockList;
import com.reandroid.arsc.header.HeaderBlock;
import com.reandroid.arsc.header.OverlayableHeader;
import com.reandroid.arsc.io.BlockReader;
import com.reandroid.arsc.item.ByteArray;
import com.reandroid.json.JSONArray;
import com.reandroid.json.JSONConvert;
import com.reandroid.json.JSONObject;

import java.io.IOException;
import java.util.List;

public class Overlayable extends Chunk implements JSONConvert {
    private final BlockList policyList;
    private final ByteArray extraBytes;

    public Overlayable() {
        super(new OverlayableHeader(), 2);
        this.policyList = new BlockList<>();
        this.extraBytes = new ByteArray();
        addChild(this.policyList);
        addChild(this.extraBytes);
    }

    public OverlayablePolicy get(int flags){
        for(OverlayablePolicy policy:listOverlayablePolicies()){
            if(flags==policy.getFlags()){
                return policy;
            }
        }
        return null;
    }
    public void addOverlayablePolicy(OverlayablePolicy overlayablePolicy){
        this.policyList.add(overlayablePolicy);
    }
    public List listOverlayablePolicies() {
        return policyList.getChildes();
    }
    public ByteArray getExtraBytes() {
        return extraBytes;
    }

    public String getName(){
        return getHeaderBlock().getName().get();
    }
    public void setName(String str){
        getHeaderBlock().getName().set(str);
    }
    public String getActor(){
        return getHeaderBlock().getActor().get();
    }
    public void setActor(String str){
        getHeaderBlock().getActor().set(str);
    }

    @Override
    protected void onChunkRefreshed() {
    }

    @Override
    public void onReadBytes(BlockReader reader) throws IOException {
        HeaderBlock headerBlock = reader.readHeaderBlock();
        checkInvalidChunk(headerBlock);

        int size = headerBlock.getChunkSize();
        BlockReader chunkReader = reader.create(size);
        headerBlock = getHeaderBlock();
        headerBlock.readBytes(chunkReader);

        readOverlayablePolicies(chunkReader);
        readExtraBytes(chunkReader);

        reader.offset(size);
        chunkReader.close();
        onChunkLoaded();
    }
    private void readOverlayablePolicies(BlockReader reader) throws IOException {
        HeaderBlock headerBlock = reader.readHeaderBlock();
        BlockList policyList = this.policyList;
        while (headerBlock!=null && headerBlock.getChunkType()==ChunkType.OVERLAYABLE_POLICY){
            OverlayablePolicy policy = new OverlayablePolicy();
            policyList.add(policy);
            policy.readBytes(reader);
            headerBlock = reader.readHeaderBlock();
        }
    }
    private void readExtraBytes(BlockReader reader) throws IOException {
        int remaining = reader.available();
        this.extraBytes.setSize(remaining);
        this.extraBytes.readBytes(reader);
    }

    @Override
    public JSONObject toJson() {
        JSONObject jsonObject = new JSONObject();
        jsonObject.put(NAME_name, getName());
        jsonObject.put(NAME_actor, getActor());
        JSONArray jsonArray = new JSONArray();
        for(OverlayablePolicy policy:listOverlayablePolicies()){
            jsonArray.put(policy.toJson());
        }
        jsonObject.put(NAME_policies, jsonArray);
        return jsonObject;
    }
    @Override
    public void fromJson(JSONObject json) {
        setName(json.optString(NAME_name));
        setActor(json.optString(NAME_actor));
        JSONArray jsonArray = json.getJSONArray(NAME_policies);
        int length = jsonArray.length();
        BlockList policyList = this.policyList;
        for(int i=0;i