/*
Copyright (c) 2011, The Mineserver Project
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the The Mineserver Project nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <ctime>
#include <iostream>
#include <fstream>

#include "constants.h"
#include "config.h"
#include "user.h"
#include "logger.h"
#include "mineserver.h"
#include "permissions.h"
#include "tools.h"
#include "plugin.h"

#include "chat.h"

using std::min;

Chat::Chat()
{
}

Chat::~Chat()
{
}

bool Chat::sendUserlist(User* user)
{
  this->sendMsg(user, MC_COLOR_BLUE + "[ " + dtos(User::all().size()) + " / " + dtos(Mineserver::get()->config()->iData("system.user_limit")) + " players online ]", USER);
  std::string playerDesc;
  for (unsigned int i = 0; i < User::all().size(); i++)
  {
    if (!User::all()[i]->logged)
    {
      continue;
    }
    playerDesc += User::all()[i]->nick;
    if (User::all()[i]->muted)
    {
      playerDesc += MC_COLOR_YELLOW + " (muted)";
    }
    if (User::all()[i]->dnd)
    {
      playerDesc += MC_COLOR_YELLOW + " (dnd)";
    }
    playerDesc += ", ";
  }
  this->sendMsg(user, playerDesc, USER);

  return true;
}

std::deque<std::string> Chat::parseCmd(std::string cmd)
{
  int del;
  std::deque<std::string> temp;

  while (cmd.length() > 0)
  {
    while (cmd[0] == ' ')
    {
      cmd = cmd.substr(1);
    }

    del = cmd.find(' ');

    if (del > -1)
    {
      temp.push_back(cmd.substr(0, del));
      cmd = cmd.substr(del + 1);
    }
    else
    {
      temp.push_back(cmd);
      break;
    }
  }

  if (temp.empty())
  {
    temp.push_back("empty");
  }

  return temp;
}

bool Chat::handleMsg(User* user, std::string msg)
{
  if (msg.empty()) // If the message is empty handle it as if there is no message.
  {
    return true;
  }

  // Timestamp
  time_t rawTime = time(NULL);
  struct tm* Tm  = localtime(&rawTime);
  std::string timeStamp(asctime(Tm));
  timeStamp = timeStamp.substr(11, 5);

  if ((static_cast<Hook3<bool, const char*, time_t, const char*>*>(Mineserver::get()->plugin()->getHook("PlayerChatPre")))->doUntilFalse(user->nick.c_str(), rawTime, msg.c_str()))
  {
    return false;
  }
  (static_cast<Hook3<bool, const char*, time_t, const char*>*>(Mineserver::get()->plugin()->getHook("PlayerChatPost")))->doAll(user->nick.c_str(), rawTime, msg.c_str());
  char prefix = msg[0];

  switch (prefix)
  {
    // Servermsg (Admin-only)
  case SERVERMSGPREFIX:
    if (IS_ADMIN(user->permissions))
    {
      handleServerMsg(user, msg, timeStamp);
    }
    break;

    // Admin message
  case ADMINCHATPREFIX:
    if (IS_ADMIN(user->permissions))
    {
      handleAdminChatMsg(user, msg, timeStamp);
    }
    break;

  case CHATCMDPREFIX:
    handleCommand(user, msg, timeStamp);
    break;
    // Normal chat message
  default:
    handleChatMsg(user, msg, timeStamp);
    break;
  }

  return true;
}

void Chat::handleCommand(User* user, std::string msg, const std::string& timeStamp)
{
  std::deque<std::string> cmd = parseCmd(msg.substr(1));

  if (!cmd.size() || !cmd[0].size())
  {
    return;
  }

  std::string command = cmd[0];
  cmd.pop_front();

  char** param = new char *[cmd.size()];

  for (uint32_t i = 0; i < cmd.size(); i++)
  {
    param[i] = (char*)cmd[i].c_str();
  }

  // If hardcoded auth command!
  if (command == "auth" && param[0] == Mineserver::get()->config()->sData("system.admin.password"))
  {
    user->serverAdmin = true;
    msg = MC_COLOR_RED + "[!] " + MC_COLOR_GREEN + "You have been authed as admin!";
    sendMsg(user, msg, USER);
  }
  else
  {
    (static_cast<Hook4<bool, const char*, const char*, int, const char**>*>(Mineserver::get()->plugin()->getHook("PlayerChatCommand")))->doAll(user->nick.c_str(), command.c_str(), cmd.size(), (const char**)param);
  }

  delete [] param;

}


void Chat::handleServerMsg(User* user, std::string msg, const std::string& timeStamp)
{
  // Decorate server message
  LOG2(INFO, "[!] " + msg.substr(1));
  msg = MC_COLOR_RED + "[!] " + MC_COLOR_GREEN + msg.substr(1);
  this->sendMsg(user, msg, ALL);
}

void Chat::handleAdminChatMsg(User* user, std::string msg, const std::string& timeStamp)
{
  LOG2(INFO, "[@] <" + user->nick + "> " + msg.substr(1));
  msg = timeStamp +  MC_COLOR_RED + " [@]" + MC_COLOR_WHITE + " <" + MC_COLOR_DARK_MAGENTA + user->nick + MC_COLOR_WHITE + "> " + msg.substr(1);
  this->sendMsg(user, msg, ADMINS);
}

void Chat::handleChatMsg(User* user, std::string msg, const std::string& timeStamp)
{
  if (user->isAbleToCommunicate("chat") == false)
  {
    return;
  }

  // Check for Admins or Server Console
  if (user->UID == SERVER_CONSOLE_UID)
  {
    LOG2(INFO, user->nick + " " + msg);
    msg = timeStamp + " " + MC_COLOR_RED + user->nick + MC_COLOR_WHITE + " " + msg;
  }
  else if (IS_ADMIN(user->permissions))
  {
    LOG2(INFO, "<" + user->nick + "> " + msg);
    msg = timeStamp + " <" + MC_COLOR_DARK_MAGENTA + user->nick + MC_COLOR_WHITE + "> " + msg;
  }
  else
  {
    LOG2(INFO, "<" + user->nick + "> " + msg);
    msg = timeStamp + " <" + user->nick + "> " + msg;
  }

  this->sendMsg(user, msg, ALL);
}

bool Chat::sendMsg(User* user, std::string msg, MessageTarget action)
{
  std::wstring wMsg = stows(msg);
  uint32_t strLength = min((uint32_t)kMaxChatMessageLength,(uint32_t)wMsg.size());
  size_t tmpArrayLen = strLength*2 + 3;

  uint8_t* tmpArray    = new uint8_t[tmpArrayLen];

  tmpArray[0] = 0x03;
  tmpArray[1] = 0;
  tmpArray[2] = msg.size() & 0xff;

  for (unsigned int i = 0; i < strLength; i++)
  {
    uint8_t* currentChar = (uint8_t*)(wMsg.c_str()+i); 
    tmpArray[(i*2)+3] = *(currentChar+1);
    tmpArray[(i*2)+1+3] = *(currentChar);
  }

  switch (action)
  {
  case ALL:
    user->sendAll(tmpArray, tmpArrayLen);
    break;

  case USER:
    user->buffer.addToWrite(tmpArray, tmpArrayLen);
    break;

  case ADMINS:
    user->sendAdmins(tmpArray, tmpArrayLen);
    break;

  case OPS:
    user->sendOps(tmpArray, tmpArrayLen);
    break;

  case GUESTS:
    user->sendGuests(tmpArray, tmpArrayLen);
    break;

  case OTHERS:
    user->sendOthers(tmpArray, tmpArrayLen);
    break;
  }

  delete[] tmpArray;

  return true;
}