/*

https://github.com/peterix/dfhack

Copyright (c) 2009-2011 Petr Mrázek (peterix@gmail.com)

This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any

damages arising from the use of this software.

Permission is granted to anyone to use this software for any

purpose, including commercial applications, and to alter it and

redistribute it freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must

not claim that you wrote the original software. If you use this

software in a product, an acknowledgment in the product documentation

would be appreciated but is not required.

2. Altered source versions must be plainly marked as such, and

must not be misrepresented as being the original software.

3. This notice may not be removed or altered from any source

distribution.

*/

#include "Internal.h"

#include <string>

#include <vector>

#include <map>

#include <set>

#include <cstdio>

#include <cstring>

#include <iterator>

#include <sstream>

using namespace std;

#include "dfhack/Error.h"

#include "dfhack/Process.h"

#include "dfhack/Core.h"

#include "dfhack/Console.h"

#include "dfhack/Module.h"

#include "dfhack/VersionInfoFactory.h"

#include "dfhack/PluginManager.h"

#include "ModuleFactory.h"

#include "dfhack/modules/Gui.h"

#include "dfhack/modules/World.h"

#include "dfhack/SDL_fakes/events.h"

#include <stdio.h>

#include <iomanip>

#include <stdlib.h>

using namespace DFHack;

struct Core::Cond

{

Cond()

{

predicate = false;

wakeup = SDL_CreateCond();

}

~Cond()

{

SDL_DestroyCond(wakeup);

}

bool Lock(SDL::Mutex * m)

{

while(!predicate)

{

SDL_CondWait(wakeup,m);

}

predicate = false;

return true;

}

bool Unlock()

{

predicate = true;

SDL_CondSignal(wakeup);

return true;

}

SDL::Cond * wakeup;

bool predicate;

};

void cheap_tokenise(string const& input, vector<string> &output)

{

istringstream str(input);

istream_iterator<string> cur(str), end;

output.assign(cur, end);

}

struct IODATA

{

Core * core;

PluginManager * plug_mgr;

};

// A thread function... for handling hotkeys. This is needed because

// all the plugin commands are expected to be run from foreign threads.

// Running them from one of the main DF threads will result in deadlock!

int fHKthread(void * iodata)

{

Core * core = ((IODATA*) iodata)->core;

PluginManager * plug_mgr = ((IODATA*) iodata)->plug_mgr;

if(plug_mgr == 0 || core == 0)

{

cerr << "Hotkey thread has croaked." << endl;

return 0;

}

while(1)

{

std::string stuff = core->getHotkeyCmd(); // waits on mutex!

if(!stuff.empty())

{

vector <string> crap;

plug_mgr->InvokeCommand(stuff, crap);

}

}

}

// A thread function... for the interactive console.

int fIOthread(void * iodata)

{

IODATA * iod = ((IODATA*) iodata);

Core * core = iod->core;

PluginManager * plug_mgr = ((IODATA*) iodata)->plug_mgr;

Console & con = core->con;

if(plug_mgr == 0 || core == 0)

{

con.printerr("Something horrible happened in Core's constructor...\n");

return 0;

}

con.print("DFHack is ready. Have a nice day!\n"

"Type in '?' or 'help' for general help, 'ls' to see all commands.\n");

int clueless_counter = 0;

while (true)

{

string command = "";

int ret = con.lineedit("[DFHack]# ",command);

if(ret == -2)

{

cerr << "Console is shutting down properly." << endl;

return 0;

}

else if(ret == -1)

{

cerr << "Console caught an unspecified error." << endl;

continue;

}

else if(ret)

{

// a proper, non-empty command was entered

con.history_add(command);

}

// cut the input into parts

vector <string> parts;

cheap_tokenise(command,parts);

if(parts.size() == 0)

{

clueless_counter ++;

continue;

}

string first = parts[0];

parts.erase(parts.begin());

// let's see what we actually got

if(first=="help" || first == "?")

{

if(!parts.size())

{

con.print("This is the DFHack console. You can type commands in and manage DFHack plugins from it.\n"

"Some basic editing capabilities are included (single-line text editing).\n"

"The console also has a command history - you can navigate it with Up and Down keys.\n"

"On Windows, you may have to resize your console window. The appropriate menu is accessible\n"

"by clicking on the program icon in the top bar of the window.\n\n"

"Basic commands:\n"

" help|? - This text.\n"

" ls|dir [PLUGIN] - List available commands. Optionally for single plugin.\n"

" cls - Clear the console.\n"

" fpause - Force DF to pause.\n"

" die - Force DF to close immediately\n"

"Plugin management (useful for developers):\n"

//" belongs COMMAND - Tell which plugin a command belongs to.\n"

" plug [PLUGIN|v] - List plugin state and description.\n"

" load PLUGIN|all - Load a plugin by name or load all possible plugins.\n"

" unload PLUGIN|all - Unload a plugin or all loaded plugins.\n"

" reload PLUGIN|all - Reload a plugin or all loaded plugins.\n"

);

}

else

{

con.printerr("not implemented yet\n");

}

}

else if( first == "load" )

{

if(parts.size())

{

string & plugname = parts[0];

if(plugname == "all")

{

for(int i = 0; i < plug_mgr->size();i++)

{

Plugin * plug = (plug_mgr->operator[](i));

plug->load();

}

}

else

{

Plugin * plug = plug_mgr->getPluginByName(plugname);

if(!plug) con.printerr("No such plugin\n");

plug->load();

}

}

}

else if( first == "reload" )

{

if(parts.size())

{

string & plugname = parts[0];

if(plugname == "all")

{

for(int i = 0; i < plug_mgr->size();i++)

{

Plugin * plug = (plug_mgr->operator[](i));

plug->reload();

}

}

else

{

Plugin * plug = plug_mgr->getPluginByName(plugname);

if(!plug) con.printerr("No such plugin\n");

plug->reload();

}

}

}

else if( first == "unload" )

{

if(parts.size())

{

string & plugname = parts[0];

if(plugname == "all")

{

for(int i = 0; i < plug_mgr->size();i++)

{

Plugin * plug = (plug_mgr->operator[](i));

plug->unload();

}

}

else

{

Plugin * plug = plug_mgr->getPluginByName(plugname);

if(!plug) con.printerr("No such plugin\n");

plug->unload();

}

}

}

else if(first == "ls" || first == "dir")

{

if(parts.size())

{

string & plugname = parts[0];

const Plugin * plug = plug_mgr->getPluginByName(plugname);

if(!plug)

{

con.printerr("There's no plugin called %s!\n",plugname.c_str());

}

else for (int j = 0; j < plug->size();j++)

{

const PluginCommand & pcmd = (plug->operator[](j));

con.print(" %-22s - %s\n",pcmd.name.c_str(), pcmd.description.c_str());

}

}

else

{

con.print(

"builtin:\n"

" help|? - This text or help specific to a plugin.\n"

" ls [PLUGIN] - List available commands. Optionally for single plugin.\n"

" cls - Clear the console.\n"

" fpause - Force DF to pause.\n"

" die - Force DF to close immediately\n"

" belongs COMMAND - Tell which plugin a command belongs to.\n"

" plug [PLUGIN|v] - List plugin state and detailed description.\n"

" load PLUGIN|all - Load a plugin by name or load all possible plugins.\n"

" unload PLUGIN|all - Unload a plugin or all loaded plugins.\n"

" reload PLUGIN|all - Reload a plugin or all loaded plugins.\n"

"\n"

"plugins:\n"

);

for(int i = 0; i < plug_mgr->size();i++)

{

const Plugin * plug = (plug_mgr->operator[](i));

if(!plug->size())

continue;

for (int j = 0; j < plug->size();j++)

{

const PluginCommand & pcmd = (plug->operator[](j));

con.print(" %-22s- %s\n",pcmd.name.c_str(), pcmd.description.c_str());

}

}

}

}

else if(first == "plug")

{

for(int i = 0; i < plug_mgr->size();i++)

{

const Plugin * plug = (plug_mgr->operator[](i));

if(!plug->size())

continue;

con.print("%s\n", plug->getName().c_str());

}

}

else if(first == "fpause")

{

World * w = core->getWorld();

w->SetPauseState(true);

con.print("The game was forced to pause!");

}

else if(first == "cls")

{

con.clear();

}

else if(first == "die")

{

_exit(666);

}

else

{

vector <string> parts;

cheap_tokenise(command,parts);

if(parts.size() == 0)

{

clueless_counter++;

}

else

{

string first = parts[0];

parts.erase(parts.begin());

command_result res = plug_mgr->InvokeCommand(first, parts);

if(res == CR_NOT_IMPLEMENTED)

{

con.printerr("Invalid command.\n");

clueless_counter ++;

}

/*

else if(res == CR_FAILURE)

{

con.printerr("ERROR!\n");

}

*/

}

}

if(clueless_counter == 3)

{

con.print("Do 'help' or '?' for the list of available commands.\n");

clueless_counter = 0;

}

}

}

Core::Core()

{

// init the console. This must be always the first step!

plug_mgr = 0;

vif = 0;

p = 0;

errorstate = false;

vinfo = 0;

started = false;

memset(&(s_mods), 0, sizeof(s_mods));

// create mutex for syncing with interactive tasks

AccessMutex = 0;

core_cond = 0;

// set up hotkey capture

memset(hotkey_states,0,sizeof(hotkey_states));

hotkey_set = false;

HotkeyMutex = 0;

HotkeyCond = 0;

};

bool Core::Init()

{

// init the console. This must be always the first step!

con.init();

// find out what we are...

vif = new DFHack::VersionInfoFactory("Memory.xml");

p = new DFHack::Process(vif);

if (!p->isIdentified())

{

con.printerr("Couldn't identify this version of DF.\n");

errorstate = true;

delete p;

p = NULL;

return false;

}

vinfo = p->getDescriptor();

// create mutex for syncing with interactive tasks

AccessMutex = SDL_CreateMutex();

if(!AccessMutex)

{

con.printerr("Mutex creation failed\n");

errorstate = true;

return false;

}

core_cond = new Core::Cond();

// create plugin manager

plug_mgr = new PluginManager(this);

if(!plug_mgr)

{

con.printerr("Failed to create the Plugin Manager.\n");

errorstate = true;

return false;

}

// look for all plugins,

// create IO thread

IODATA *temp = new IODATA;

temp->core = this;

temp->plug_mgr = plug_mgr;

SDL::Thread * IO = SDL_CreateThread(fIOthread, (void *) temp);

// set up hotkey capture

HotkeyMutex = SDL_CreateMutex();

HotkeyCond = SDL_CreateCond();

SDL::Thread * HK = SDL_CreateThread(fHKthread, (void *) temp);

started = true;

return true;

}

/// sets the current hotkey command

bool Core::setHotkeyCmd( std::string cmd )

{

// access command

SDL_mutexP(HotkeyMutex);

{

hotkey_set = true;

hotkey_cmd = cmd;

SDL_CondSignal(HotkeyCond);

}

SDL_mutexV(HotkeyMutex);

return true;

}

/// removes the hotkey command and gives it to the caller thread

std::string Core::getHotkeyCmd( void )

{

string returner;

SDL_mutexP(HotkeyMutex);

while ( ! hotkey_set )

{

SDL_CondWait(HotkeyCond, HotkeyMutex);

}

hotkey_set = false;

returner = hotkey_cmd;

hotkey_cmd.clear();

SDL_mutexV(HotkeyMutex);

return returner;

}

void Core::Suspend()

{

Core::Cond * nc = new Core::Cond();

// put the condition on a stack

SDL_mutexP(StackMutex);

suspended_tools.push(nc);

SDL_mutexV(StackMutex);

// wait until Core::Update() wakes up the tool

SDL_mutexP(AccessMutex);

nc->Lock(AccessMutex);

SDL_mutexV(AccessMutex);

}

void Core::Resume()

{

SDL_mutexP(AccessMutex);

core_cond->Unlock();

SDL_mutexV(AccessMutex);

}

// should always be from simulation thread!

int Core::Update()

{

if(!started) Init();

if(errorstate)

return -1;

// notify all the plugins that a game tick is finished

plug_mgr->OnUpdate();

// wake waiting tools

// do not allow more tools to join in while we process stuff here

SDL_mutexP(StackMutex);

while (!suspended_tools.empty())

{

Core::Cond * nc = suspended_tools.top();

suspended_tools.pop();

SDL_mutexP(AccessMutex);

// wake tool

nc->Unlock();

// wait for tool to wake us

core_cond->Lock(AccessMutex);

SDL_mutexV(AccessMutex);

// destroy condition

delete nc;

}

SDL_mutexV(StackMutex);

return 0;

};

// FIXME: needs to terminate the IO threads and properly dismantle all the machinery involved.

int Core::Shutdown ( void )

{

errorstate = 1;

if(plug_mgr)

{

delete plug_mgr;

plug_mgr = 0;

}

// invalidate all modules

for(unsigned int i = 0 ; i < allModules.size(); i++)

{

delete allModules[i];

}

allModules.clear();

memset(&(s_mods), 0, sizeof(s_mods));

con.shutdown();

return -1;

}

int Core::SDL_Event(SDL::Event* ev, int orig_return)

{

// do NOT process events before we are ready.

if(!started) return orig_return;

if(!ev)

return orig_return;

if(ev && ev->type == SDL::ET_KEYDOWN || ev->type == SDL::ET_KEYUP)

{

SDL::KeyboardEvent * ke = (SDL::KeyboardEvent *)ev;

bool shift = ke->ksym.mod & SDL::KMOD_SHIFT;

// consuming F1 .. F8

int idx = ke->ksym.sym - SDL::K_F1;

if(idx < 0 || idx > 7)

return orig_return;

idx += 8*shift;

// now we have the real index...

if(ke->state == SDL::BTN_PRESSED && !hotkey_states[idx])

{

hotkey_states[idx] = 1;

Gui * g = getGui();

if(g->hotkeys && g->df_interface && g->df_menu_state)

{

t_viewscreen * ws = g->GetCurrentScreen();

// FIXME: put hardcoded values into memory.xml

if(ws->getClassName() == "viewscreen_dwarfmodest" && *g->df_menu_state == 0x23)

return orig_return;

else

{

t_hotkey & hotkey = (*g->hotkeys)[idx];

setHotkeyCmd(hotkey.name);

}

}

}

else if(ke->state == SDL::BTN_RELEASED)

{

hotkey_states[idx] = 0;

}

}

return orig_return;

// do stuff with the events...

}

/*******************************************************************************

M O D U L E S

*******************************************************************************/

#define MODULE_GETTER(TYPE) \

TYPE * Core::get##TYPE() \

{ \

if(errorstate) return NULL;\

if(!s_mods.p##TYPE)\

{\

Module * mod = create##TYPE();\

s_mods.p##TYPE = (TYPE *) mod;\

allModules.push_back(mod);\

}\

return s_mods.p##TYPE;\

}

MODULE_GETTER(Creatures);

MODULE_GETTER(Engravings);

MODULE_GETTER(Maps);

MODULE_GETTER(Gui);

MODULE_GETTER(World);

MODULE_GETTER(Materials);

MODULE_GETTER(Items);

MODULE_GETTER(Translation);

MODULE_GETTER(Vegetation);

MODULE_GETTER(Buildings);

MODULE_GETTER(Constructions);

MODULE_GETTER(Vermin);

MODULE_GETTER(Notes);