/*
 * 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.
 */
#include <stdio.h>
#include "Exception.h"
#include <decaf/util/logging/LoggerDefines.h>
#include <sstream>

#include <apr_pools.h>
#include <apr_strings.h>

using namespace std;
using namespace decaf;
using namespace decaf::lang;
using namespace decaf::util::logging;

////////////////////////////////////////////////////////////////////////////////
Exception::Exception() throw(){
}

////////////////////////////////////////////////////////////////////////////////
Exception::Exception( const Exception& ex ) throw() : Throwable() {
    *this = ex;
}

////////////////////////////////////////////////////////////////////////////////
Exception::Exception( const char* file, const int lineNumber,
                      const char* msg, ... ) throw() {
    va_list vargs;
    va_start( vargs, msg ) ;
    buildMessage( msg, vargs );

    // Set the first mark for this exception.
    setMark( file, lineNumber );
}

////////////////////////////////////////////////////////////////////////////////
Exception::~Exception() throw(){
}

////////////////////////////////////////////////////////////////////////////////
void Exception::setMessage( const char* msg, ... ){
    va_list vargs;
    va_start( vargs, msg );
    buildMessage( msg, vargs );
}

////////////////////////////////////////////////////////////////////////////////
void Exception::buildMessage( const char* format, va_list& vargs ) {

    // Allocate buffer with a guess of it's size
    apr_pool_t* pool = NULL;
    apr_pool_create( &pool, NULL );

    // Allocate a buffer of the specified size.
    char* buffer = apr_pvsprintf( pool, format, vargs );

    // Guessed size was enough. Assign the string.
    message.assign( buffer, strlen( buffer ) );

    // assign isn't passing ownership, just copying, delete
    // the allocated buffer.
    apr_pool_destroy( pool );

    //decaf::util::logger::SimpleLogger logger("com.yadda1");
    //logger.log( message );
}

////////////////////////////////////////////////////////////////////////////////
void Exception::setMark( const char* file, const int lineNumber ) {

    // Add this mark to the end of the stack trace.
    stackTrace.push_back( std::make_pair( (std::string)file, (int)lineNumber ) );

    std::ostringstream stream;
    stream << "\tFILE: " << stackTrace[stackTrace.size()-1].first;
    stream << ", LINE: " << stackTrace[stackTrace.size()-1].second;

    //decaf::util::logger::SimpleLogger logger("com.yadda2");
    //logger.log( stream.str() );
}

////////////////////////////////////////////////////////////////////////////////
Exception* Exception::clone() const {
    return new Exception( *this );
}

////////////////////////////////////////////////////////////////////////////////
std::vector< std::pair< std::string, int> > Exception::getStackTrace() const {
    return stackTrace;
}

////////////////////////////////////////////////////////////////////////////////
void Exception::printStackTrace() const {
    printStackTrace( std::cerr );
}

////////////////////////////////////////////////////////////////////////////////
void Exception::printStackTrace( std::ostream& stream ) const {
    stream << getStackTraceString();
}

////////////////////////////////////////////////////////////////////////////////
std::string Exception::getStackTraceString() const {

    // Create the output stream.
    std::ostringstream stream;

    // Write the message and each stack entry.
    stream << message << std::endl;
    for( unsigned int ix=0; ix<stackTrace.size(); ++ix ){
        stream << "\tFILE: " << stackTrace[ix].first;
        stream << ", LINE: " << stackTrace[ix].second;
        stream << std::endl;
    }

    // Return the string from the output stream.
    return stream.str();
}

////////////////////////////////////////////////////////////////////////////////
Exception& Exception::operator =( const Exception& ex ){
    this->message = ex.message;
    this->stackTrace = ex.stackTrace;
    return *this;
}