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package com.jsoniter.any;

import com.jsoniter.*;

import com.jsoniter.output.JsonStream;

import com.jsoniter.spi.JsonException;

import com.jsoniter.spi.TypeLiteral;

import java.io.IOException;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import java.util.Set;

class ObjectLazyAny extends LazyAny {

private final static TypeLiteral<Map<String, Any>> typeLiteral = new TypeLiteral<Map<String, Any>>(){};

private Map<String, Any> cache;

private int lastParsedPos;

public ObjectLazyAny(byte[] data, int head, int tail) {

super(data, head, tail);

lastParsedPos = head;

}

@Override

public ValueType valueType() {

return ValueType.OBJECT;

}

@Override

public Object object() {

fillCache();

return cache;

}

@Override

public boolean toBoolean() {

try {

return CodegenAccess.readObjectStart(parse());

} catch (IOException e) {

throw new JsonException(e);

}

}

@Override

public int toInt() {

return size();

}

@Override

public long toLong() {

return size();

}

@Override

public float toFloat() {

return size();

}

@Override

public double toDouble() {

return size();

}

@Override

public int size() {

fillCache();

return cache.size();

}

@Override

public Set<String> keys() {

fillCache();

return (Set) cache.keySet();

}

@Override

public Any get(Object key) {

Any element = fillCacheUntil(key);

if (element == null) {

return new NotFoundAny(key, object());

}

return element;

}

@Override

public Any get(Object[] keys, int idx) {

if (idx == keys.length) {

return this;

}

Object key = keys[idx];

if (isWildcard(key)) {

fillCache();

HashMap<String, Any> result = new HashMap<String, Any>();

for (Map.Entry<String, Any> entry : cache.entrySet()) {

Any mapped = entry.getValue().get(keys, idx + 1);

if (mapped.valueType() != ValueType.INVALID) {

result.put(entry.getKey(), mapped);

}

}

return Any.rewrap(result);

}

Any child = fillCacheUntil(key);

if (child == null) {

return new NotFoundAny(keys, idx, object());

}

return child.get(keys, idx+1);

}

private Any fillCacheUntil(Object target) {

if (lastParsedPos == tail) {

return cache.get(target);

}

if (cache == null) {

cache = new HashMap<String, Any>(4);

}

Any value = cache.get(target);

if (value != null) {

return value;

}

try {

JsonIterator iter = JsonIterator.tlsIter.get();

iter.reset(data, lastParsedPos, tail);

if (lastParsedPos == head) {

if (!CodegenAccess.readObjectStart(iter)) {

lastParsedPos = tail;

return null;

}

String field = CodegenAccess.readObjectFieldAsString(iter);

value = iter.readAny();

cache.put(field, value);

if (field.hashCode() == target.hashCode() && field.equals(target)) {

lastParsedPos = CodegenAccess.head(iter);

return value;

}

}

while (CodegenAccess.nextToken(iter) == ',') {

String field = CodegenAccess.readObjectFieldAsString(iter);

value = iter.readAny();

cache.put(field, value);

if (field.hashCode() == target.hashCode() && field.equals(target)) {

lastParsedPos = CodegenAccess.head(iter);

return value;

}

}

lastParsedPos = tail;

return null;

} catch (IOException e) {

throw new JsonException(e);

}

}

private void fillCache() {

if (lastParsedPos == tail) {

return;

}

if (cache == null) {

cache = new HashMap<String, Any>(4);

}

try {

JsonIterator iter = JsonIterator.tlsIter.get();

iter.reset(data, lastParsedPos, tail);

if (lastParsedPos == head) {

if (!CodegenAccess.readObjectStart(iter)) {

lastParsedPos = tail;

return;

}

String field = CodegenAccess.readObjectFieldAsString(iter);

cache.put(field, iter.readAny());

}

while (CodegenAccess.nextToken(iter) == ',') {

String field = CodegenAccess.readObjectFieldAsString(iter);

cache.put(field, iter.readAny());

}

lastParsedPos = tail;

} catch (IOException e) {

throw new JsonException(e);

}

}

@Override

public EntryIterator entries() {

return new LazyIterator();

}

private class LazyIterator implements EntryIterator {

private Iterator<Map.Entry<String, Any>> mapIter;

private String key;

private Any value;

public LazyIterator() {

if (cache == null) {

cache = new HashMap<String, Any>();

}

mapIter = new HashMap<String, Any>(cache).entrySet().iterator();

try {

if (lastParsedPos == head) {

JsonIterator iter = JsonIterator.tlsIter.get();

iter.reset(data, lastParsedPos, tail);

if (!CodegenAccess.readObjectStart(iter)) {

lastParsedPos = tail;

} else {

lastParsedPos = CodegenAccess.head(iter);

}

}

} catch (IOException e) {

throw new JsonException(e);

}

}

@Override

public boolean next() {

if (lastParsedPos == tail) {

return false;

}

if (mapIter != null) {

if (mapIter.hasNext()) {

Map.Entry<String, Any> entry = mapIter.next();

key = entry.getKey();

value = entry.getValue();

return true;

} else {

mapIter = null;

}

}

try {

JsonIterator iter = JsonIterator.tlsIter.get();

iter.reset(data, lastParsedPos, tail);

key = CodegenAccess.readObjectFieldAsString(iter);

value = iter.readAny();

cache.put(key, value);

if (CodegenAccess.nextToken(iter) == ',') {

lastParsedPos = CodegenAccess.head(iter);

} else {

lastParsedPos = tail;

}

} catch (IOException e) {

throw new JsonException(e);

}

return true;

}

@Override

public String key() {

return key;

}

@Override

public Any value() {

return value;

}

}

@Override

public void writeTo(JsonStream stream) throws IOException {

if (lastParsedPos == head) {

super.writeTo(stream);

} else {

// there might be modification

fillCache();

stream.writeVal(typeLiteral, (Map) cache);

}

}

@Override

public String toString() {

if (lastParsedPos == head) {

return super.toString();

} else {

fillCache();

return JsonStream.serialize(cache);

}

}

}