replay_controller.cpp

/*
   Copyright (C) 2006 - 2014 by Joerg Hinrichs <joerg.hinrichs@alice-dsl.de>
   wesnoth playlevel Copyright (C) 2003 by David White <dave@whitevine.net>
   Part of the Battle for Wesnoth Project http://www.wesnoth.org/

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY.

   See the COPYING file for more details.
*/

#include "global.hpp"

#include "replay_controller.hpp"

#include "carryover.hpp"
#include "actions/vision.hpp"
#include "game_end_exceptions.hpp"
#include "game_events/handlers.hpp"
#include "gettext.hpp"
#include "log.hpp"
#include "map_label.hpp"
#include "mouse_handler_base.hpp"
#include "replay.hpp"
#include "random_new_deterministic.hpp"
#include "resources.hpp"
#include "savegame.hpp"
#include "synced_context.hpp"

#include <boost/foreach.hpp>
#include <boost/scoped_ptr.hpp>

static lg::log_domain log_engine("engine");
#define DBG_NG LOG_STREAM(debug, log_engine)

static lg::log_domain log_replay("replay");
#define DBG_REPLAY LOG_STREAM(debug, log_replay)
#define LOG_REPLAY LOG_STREAM(info, log_replay)
#define ERR_REPLAY LOG_STREAM(err, log_replay)

possible_end_play_signal play_replay_level_main_loop(replay_controller & replaycontroller, bool & is_unit_test);

LEVEL_RESULT play_replay_level(const config& game_config,
		CVideo& video, game_state& state_of_game, bool is_unit_test)
{
	const int ticks = SDL_GetTicks();

	config init_level = state_of_game.replay_start();

	DBG_NG << "creating objects... " << (SDL_GetTicks() - ticks) << std::endl;

	boost::scoped_ptr<replay_controller> rc;

	try {
		rc.reset(new replay_controller(init_level, state_of_game, ticks, game_config, video));
	} catch (end_level_exception & e){
		return e.result;
	} catch (end_turn_exception &) {
		throw; //this should never happen? It would likely have crashed the program before, so in refactor I won't change but we should fix it later.
	}
	DBG_NG << "created objects... " << (SDL_GetTicks() - rc->get_ticks()) << std::endl;

	const events::command_disabler disable_commands;

	//replay event-loop
	possible_end_play_signal signal = play_replay_level_main_loop(*rc, is_unit_test);

	if (signal) {
		switch( boost::apply_visitor( get_signal_type(), *signal ) ) {
			case END_LEVEL:
				DBG_NG << "play_replay_level: end_level_exception" << std::endl;
				break;
			case END_TURN:
				DBG_NG << "Unchecked end_turn_exception signal propogated to replay controller play_replay_level! Terminating." << std::endl;
				assert(false && "unchecked end turn exception in replay controller");
				throw 42;
		}
	}

	return VICTORY;
}

possible_end_play_signal play_replay_level_main_loop(replay_controller & replaycontroller, bool & is_unit_test) {
	if (is_unit_test) {
		return replaycontroller.try_run_to_completion();
	}

	for (;;){
		HANDLE_END_PLAY_SIGNAL( replaycontroller.play_slice() );
	}
}

possible_end_play_signal replay_controller::try_run_to_completion() {
	for (;;) {
		HANDLE_END_PLAY_SIGNAL( play_slice() );
		if (recorder.at_end()) {
			return boost::none;
		} else {
			if (!is_playing_) {
				PROPOGATE_END_PLAY_SIGNAL( play_replay() );
			}
		}
	}
}

replay_controller::replay_controller(const config& level,
		game_state& state_of_game, const int ticks,
		const config& game_config, CVideo& video) :
	play_controller(level, state_of_game, ticks, game_config, video, false),
	gamestate_start_(gamestate_),
	gameboard_start_(gameboard_),
	tod_manager_start_(level),
	current_turn_(1),
	is_playing_(false),
	show_everything_(false),
	show_team_(state_of_game.classification().campaign_type == game_classification::MULTIPLAYER ? 0 : 1)
{
	tod_manager_start_ = tod_manager_;

	// Our parent class correctly detects that we are loading a game. However,
	// we are not loading mid-game, so from here on, treat this as not loading
	// a game. (Allows turn_1 et al. events to fire at the correct time.)
	loading_game_ = false;

	init();
	reset_replay();
}

replay_controller::~replay_controller()
{
	//YogiHH
	//not absolutely sure if this is needed, but it makes me feel a lot better ;-)
	//feel free to delete this if it is not necessary
	gui_->get_theme().theme_reset_event().detach_handler(this);
	gui_->complete_redraw_event().detach_handler(this);
}

void replay_controller::init(){
	DBG_REPLAY << "in replay_controller::init()...\n";

	//guarantee the cursor goes back to 'normal' at the end of the level
	const cursor::setter cursor_setter(cursor::NORMAL);
	init_replay_display();
}

void replay_controller::init_gui(){
	DBG_NG << "Initializing GUI... " << (SDL_GetTicks() - ticks_) << "\n";
	play_controller::init_gui();

	if (show_team_)
		gui_->set_team(show_team_ - 1, show_everything_);
	else
		gui_->set_team(0, show_everything_);

	gui_->scroll_to_leader(player_number_, display::WARP);
	update_locker lock_display((*gui_).video(),false);
	BOOST_FOREACH(team & t, gameboard_.teams_) {
		t.reset_objectives_changed();
	}

	update_replay_ui();
}

void replay_controller::init_replay_display(){
	DBG_REPLAY << "initializing replay-display... " << (SDL_GetTicks() - ticks_) << "\n";

	rebuild_replay_theme();
	gui_->get_theme().theme_reset_event().attach_handler(this);
	gui_->complete_redraw_event().attach_handler(this);
	DBG_REPLAY << "done initializing replay-display... " << (SDL_GetTicks() - ticks_) << "\n";
}

void replay_controller::rebuild_replay_theme()
{
	const config &theme_cfg = get_theme(game_config_, level_["theme"]);
	if (const config &res = theme_cfg.child("resolution"))
	{
		if (const config &replay_theme_cfg = res.child("replay"))
			gui_->get_theme().modify(replay_theme_cfg);
		gui_->get_theme().modify_label("time-icon", _ ("current local time"));
		//Make sure we get notified if the theme is redrawn completely. That way we have
		//a chance to restore the replay controls of the theme as well.
		gui_->invalidate_theme();
	}
}

gui::button* replay_controller::play_button()
{
	return gui_->find_action_button("button-playreplay");
}

gui::button* replay_controller::stop_button()
{
	return gui_->find_action_button("button-stopreplay");
}

gui::button* replay_controller::reset_button()
{
	return gui_->find_action_button("button-resetreplay");
}

gui::button* replay_controller::play_turn_button()
{
	return gui_->find_action_button("button-nextturn");
}

gui::button* replay_controller::play_side_button()
{
	return gui_->find_action_button("button-nextside");
}

void replay_controller::update_replay_ui()
{
	//check if we have all buttons - if someone messed with theme then some buttons may be missing
	//if any of the buttons is missing, we just disable every one
	if(!replay_ui_has_all_buttons()) {
		gui::button *play_b = play_button(), *stop_b = stop_button(),
		            *reset_b = reset_button(), *play_turn_b = play_turn_button(),
		            *play_side_b = play_side_button();

		if(play_b) {
			play_b->enable(false);
		}

		if(stop_b) {
			stop_b->enable(false);
		}

		if(reset_b) {
			reset_b->enable(false);
		}

		if(play_turn_b) {
			play_turn_b->enable(false);
		}

		if(play_side_b) {
			play_side_b->enable(false);
		}
	}
}

void replay_controller::replay_ui_playback_should_start()
{
	if(!replay_ui_has_all_buttons())
		return;

	play_button()->enable(false);
	reset_button()->enable(false);
	play_turn_button()->enable(false);
	play_side_button()->enable(false);
}

void replay_controller::replay_ui_playback_should_stop()
{
	if(!replay_ui_has_all_buttons())
		return;

	if(!recorder.at_end()) {
		play_button()->enable(true);
		reset_button()->enable(true);
		play_turn_button()->enable(true);
		play_side_button()->enable(true);

		play_button()->release();
		play_turn_button()->release();
		play_side_button()->release();
	} else {
		reset_button()->enable(true);
		stop_button()->enable(false);
	}

	if(!is_playing_) {
		//user interrupted
		stop_button()->release();
	}
}

void replay_controller::reset_replay_ui()
{
	if(!replay_ui_has_all_buttons())
		return;

	play_button()->enable(true);
	stop_button()->enable(true);
	reset_button()->enable(true);
	play_turn_button()->enable(true);
	play_side_button()->enable(true);
}


void replay_controller::reset_replay()
{
	DBG_REPLAY << "replay_controller::reset_replay\n";

	gui_->clear_chat_messages();
	is_playing_ = false;
	player_number_ = 1;
	current_turn_ = 1;
	it_is_a_new_turn_ = true;
	skip_replay_ = false;
	tod_manager_= tod_manager_start_;
	recorder.start_replay();
	recorder.set_skip(false);
	gamestate_ = gamestate_start_;
	gameboard_ = gameboard_start_;
	gui_->change_display_context(&gameboard_); //this doesn't change the pointer value, but it triggers the gui to update the internal terrain builder object,
						   //idk what the consequences of not doing that are, but its probably a good idea to do it, esp. if layout
						   //of game_board changes in the future
	if (events_manager_ ){
		// NOTE: this double reset is required so that the new
		// instance of game_events::manager isn't created before the
		// old manager is actually destroyed (triggering an assertion
		// failure)
		events_manager_.reset();
		events_manager_.reset(new game_events::manager(level_));
	}

	gui_->labels().read(level_);

	resources::gamedata->rng().seed_random(level_["random_seed"], level_["random_calls"]);
	statistics::fresh_stats();
	set_victory_when_enemies_defeated(level_["victory_when_enemies_defeated"].to_bool(true));

	resources::screen->recalculate_minimap();
	resources::screen->invalidate_all();
	resources::screen->rebuild_all();

	// Add era events for MP game.
	if (const config &era_cfg = level_.child("era")) {
		game_events::add_events(era_cfg.child_range("event"), "era_events");
	}

	// Scenario initialization. (c.f. playsingle_controller::play_scenario())
	fire_preload();
	if(true){ //block for set_scontext_synced
		if(recorder.add_start_if_not_there_yet())
		{
			ERR_REPLAY << "inserted missing [start]" << std::endl;
		}
		config* pstart = recorder.get_next_action();
		assert(pstart->has_child("start"));
		/*
			use this after recorder.add_synced_command
			because set_scontext_synced sets the checkup to the last added command
		*/
		set_scontext_synced sync;

		fire_prestart();
		init_gui();
		fire_start(true);
	}
	// Since we did not fire the start event, it_is_a_new_turn_ has the wrong value.
	it_is_a_new_turn_ = true;
	update_gui();

	reset_replay_ui();
}

void replay_controller::stop_replay(){
	is_playing_ = false;
}

possible_end_play_signal replay_controller::replay_next_turn(){
	is_playing_ = true;
	replay_ui_playback_should_start();

	PROPOGATE_END_PLAY_SIGNAL( play_turn() );

 	if (!skip_replay_ || !is_playing_){
		gui_->scroll_to_leader(player_number_,game_display::ONSCREEN,false);
	}

	replay_ui_playback_should_stop();
	return boost::none;
}

possible_end_play_signal replay_controller::replay_next_side(){
	is_playing_ = true;
	replay_ui_playback_should_start();

	HANDLE_END_PLAY_SIGNAL( play_side() );
	while (current_team().is_empty()) {
		HANDLE_END_PLAY_SIGNAL( play_side() );
	}

	if (!skip_replay_ || !is_playing_) {
		gui_->scroll_to_leader(player_number_,game_display::ONSCREEN,false);
	}

	replay_ui_playback_should_stop();
	return boost::none;
}

void replay_controller::process_oos(const std::string& msg) const
{
	if (game_config::ignore_replay_errors) {
		return;
	}

	std::stringstream message;
	message << _("The replay is corrupt/out of sync. It might not make much sense to continue. Do you want to save the game?");
	message << "\n\n" << _("Error details:") << "\n\n" << msg;

	if (non_interactive()) {
		throw game::game_error(message.str()); //throw end_level_exception(DEFEAT);
	} else {
		savegame::oos_savegame save(gamestate_, *gui_, to_config());
		save.save_game_interactive(resources::screen->video(), message.str(), gui::YES_NO); // can throw end_level_exception
	}
}

void replay_controller::replay_show_everything(){
	show_everything_ = true;
	show_team_ = 0;
	update_teams();
	update_gui();
}

void replay_controller::replay_show_each(){
	show_everything_ = false;
	show_team_ = 0;
	update_teams();
	update_gui();
}

void replay_controller::replay_show_team1(){
	show_everything_ = false;
	show_team_ = 1;
	update_teams();
	update_gui();
}

void replay_controller::replay_skip_animation(){
	skip_replay_ = !skip_replay_;
	recorder.set_skip(skip_replay_);
}

//move all sides till stop/end
possible_end_play_signal replay_controller::play_replay(){

	if (recorder.at_end()){
		//shouldn't actually happen
		return boost::none;
	}

	is_playing_ = true;
	replay_ui_playback_should_start();

	possible_end_play_signal signal = play_replay_main_loop();

	if(signal) {
		switch ( boost::apply_visitor(get_signal_type(), *signal)) {
			case END_TURN:
				return signal;
			case END_LEVEL:
				if ( boost::apply_visitor(get_result(), *signal) == QUIT) {
					return signal;
				}
		}

	}

	if (!is_playing_) {
		gui_->scroll_to_leader(player_number_,game_display::ONSCREEN,false);
	}

	replay_ui_playback_should_stop();

	return boost::none;
}

possible_end_play_signal replay_controller::play_replay_main_loop() {
	DBG_REPLAY << "starting main loop\n" << (SDL_GetTicks() - ticks_) << "\n";
	for(; !recorder.at_end() && is_playing_; first_player_ = 1) {
		PROPOGATE_END_PLAY_SIGNAL ( play_turn() );
	}
	return boost::none;
}

//make all sides move, then stop
possible_end_play_signal replay_controller::play_turn(){

	LOG_REPLAY << "turn: " << current_turn_ << "\n";

	gui_->new_turn();
	gui_->invalidate_game_status();
	events::raise_draw_event();

	bool last_team = false;

	while ( (!last_team) && (!recorder.at_end()) && is_playing_ ){
		last_team = static_cast<size_t>(player_number_) == gameboard_.teams_.size();
		PROPOGATE_END_PLAY_SIGNAL( play_side() );
		HANDLE_END_PLAY_SIGNAL( play_slice() );
	}
	return boost::none;
}

//make only one side move
possible_end_play_signal replay_controller::play_side() {

	DBG_REPLAY << "Status turn number: " << turn() << "\n";
	DBG_REPLAY << "Replay_Controller turn number: " << current_turn_ << "\n";
	DBG_REPLAY << "Player number: " << player_number_ << "\n";

	// If a side is empty skip over it.
	if (!current_team().is_empty()) {
		statistics::reset_turn_stats(current_team().save_id());

		possible_end_play_signal signal = play_controller::init_side(true);

		if (signal) {
			switch (boost::apply_visitor(get_signal_type(), *signal) ) {
				case END_TURN:
					return signal;
				case END_LEVEL:
					//VICTORY/DEFEAT end_level_exception shall not return to title screen
					LEVEL_RESULT res = boost::apply_visitor(get_result(), *signal);
					if ( res != VICTORY && res != DEFEAT ) return signal;
			}
		}

		DBG_REPLAY << "doing replay " << player_number_ << "\n";
		// if have reached the end we don't want to execute finish_side_turn and finish_turn
		// becasue we might not have enough data to execute them (like advancements during turn_end for example)

		try {
			if(do_replay() != REPLAY_FOUND_END_TURN) {
				// We reached the end of teh replay without finding and end turn tag.
				return boost::none;
			}
		} catch(end_level_exception& e){
			//VICTORY/DEFEAT end_level_exception shall not return to title screen
			if (e.result != VICTORY && e.result != DEFEAT) {
				return possible_end_play_signal(e.to_struct());
			}
		} catch (end_turn_exception & e) {
			return possible_end_play_signal(e.to_struct());
		}

		finish_side_turn();
	}

	player_number_++;

	if (static_cast<size_t>(player_number_) > gameboard_.teams_.size()) {
		//during the orginal game player_number_ would also be gameboard_.teams_.size(),
		player_number_ = gameboard_.teams_.size();
		finish_turn();
		tod_manager_.next_turn();
		it_is_a_new_turn_ = true;
		player_number_ = 1;
		current_turn_++;
		gui_->new_turn();
	}

	// This is necessary for replays in order to show possible movements.
	gameboard_.new_turn(player_number_);

	update_teams();
	update_gui();

	return boost::none;
}

void replay_controller::update_teams(){

	int next_team = player_number_;
	if(static_cast<size_t>(next_team) > gameboard_.teams_.size()) {
		next_team = 1;
	}

	if ( show_team_ == 0 ) {
		gui_->set_team(next_team - 1, show_everything_);
	} else {
		gui_->set_team(show_team_ - 1, show_everything_);
	}

	gui_->set_playing_team(next_team - 1);
	gui_->invalidate_all();
}

void replay_controller::update_gui(){
	(*gui_).recalculate_minimap();
	(*gui_).redraw_minimap();
	(*gui_).invalidate_all();
	events::raise_draw_event();
	(*gui_).draw();
}

void replay_controller::preferences(){
	play_controller::preferences();
	update_gui();
}

void replay_controller::show_statistics(){
	menu_handler_.show_statistics(gui_->playing_team()+1);
}

void replay_controller::handle_generic_event(const std::string& name){

	if( name == "completely_redrawn" ) {
		update_replay_ui();

		gui::button* skip_animation_button = gui_->find_action_button("skip-animation");
		if(skip_animation_button) {
			skip_animation_button->set_check(skip_replay_);
		}
	} else {
		rebuild_replay_theme();
	}
}

bool replay_controller::can_execute_command(const hotkey::hotkey_command& cmd, int index) const
{
	hotkey::HOTKEY_COMMAND command = cmd.id;
	bool result = play_controller::can_execute_command(cmd,index);

	switch(command) {

	//commands we can always do
	case hotkey::HOTKEY_REPLAY_SHOW_EVERYTHING:
	case hotkey::HOTKEY_REPLAY_SHOW_EACH:
	case hotkey::HOTKEY_REPLAY_SHOW_TEAM1:
	case hotkey::HOTKEY_REPLAY_SKIP_ANIMATION:
	case hotkey::HOTKEY_SAVE_GAME:
	case hotkey::HOTKEY_SAVE_REPLAY:
	case hotkey::HOTKEY_CHAT_LOG:
		return true;

	case hotkey::HOTKEY_REPLAY_RESET:
		return events::commands_disabled <= 1;

	//commands we only can do before the end of the replay
	case hotkey::HOTKEY_REPLAY_STOP:
		return !recorder.at_end();
	case hotkey::HOTKEY_REPLAY_PLAY:
	case hotkey::HOTKEY_REPLAY_NEXT_TURN:
	case hotkey::HOTKEY_REPLAY_NEXT_SIDE:
		//we have one events_disabler when starting the replay_controller and a second when entering the synced context.
		return (events::commands_disabled <= 1 ) && !recorder.at_end();
	default:
		return result;
	}
}