/**

  * vim: set ts=4 :

  * ===============================================================

  * SourceMod (C)2004-2007 AlliedModders LLC.  All rights reserved.

  * ===============================================================

  *

  * This file is not open source and may not be copied without explicit

  * written permission of AlliedModders LLC.  This file may not be redistributed 

  * in whole or significant part.

  * For information, see LICENSE.txt or http://www.sourcemod.net/license.php

  *

  * Version: $Id$

  */

 #include <stdarg.h>

 #include <time.h>

 #include "MenuManager.h"

 #include "sm_stringutil.h"

 #include "sourcemm_api.h"

 #include "PlayerManager.h"

 #include "MenuStyle_Valve.h"

 MenuManager g_Menus;

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

  *************************************

  **** BROADCAST HANDLING WRAPPERS ****

  *************************************

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

 BroadcastHandler::BroadcastHandler(IMenuHandler *handler) : m_pHandler(handler), numClients(0)

 {

 }

 unsigned int BroadcastHandler::GetMenuAPIVersion2()

 {

 	return m_pHandler->GetMenuAPIVersion2();

 }

 void BroadcastHandler::OnMenuCancel(IBaseMenu *menu, int client, MenuCancelReason reason)

 {

 	m_pHandler->OnMenuCancel(menu, client, reason);

 }

 void BroadcastHandler::OnMenuDisplay(IBaseMenu *menu, int client, IMenuDisplay *display)

 {

 	numClients++;

 	m_pHandler->OnMenuDisplay(menu, client, display);

 }

 void BroadcastHandler::OnBroadcastEnd(IBaseMenu *menu)

 {

 	g_Menus.FreeBroadcastHandler(this);

 }

 void BroadcastHandler::OnMenuSelect(IBaseMenu *menu, int client, unsigned int item)

 {

 	m_pHandler->OnMenuSelect(menu, client, item);

 }

 void BroadcastHandler::OnMenuEnd(IBaseMenu *menu)

 {

 	assert(numClients > 0);

 	/* Only fire if all clients have gotten a menu end */

 	if (--numClients == 0)

 	{

 		IMenuHandler *pHandler = m_pHandler;

 		OnBroadcastEnd(menu);

 		pHandler->OnMenuEnd(menu);

 	}

 }

 VoteHandler::VoteHandler(IMenuVoteHandler *handler) 

 : BroadcastHandler(handler), m_pVoteHandler(handler)

 {

 }

 void VoteHandler::Initialize(IBaseMenu *menu)

 {

 	unsigned int numItems = menu->GetItemCount();

 	if (m_counts.size() >= numItems)

 	{

 		for (size_t i=0; i<numItems; i++)

 		{

 			m_counts[i] = 0;

 		}

 	} else {

 		for (size_t i=0; i<m_counts.size(); i++)

 		{

 			m_counts[i] = 0;

 		}

 		m_counts.resize(numItems, 0);

 	}

 }

 void VoteHandler::OnMenuSelect(IBaseMenu *menu, int client, unsigned int item)

 {

 	if (item < numItems)

 	{

 		m_counts[item]++;

 	}

 	BroadcastHandler::OnMenuSelect(menu, client, item);

 }

 void VoteHandler::OnBroadcastEnd(IBaseMenu *menu)

 {

 	m_ties.clear();

 	size_t highest = 0;

 	for (size_t i=1; i<numItems; i++)

 	{

 		if (m_counts[i] > m_counts[highest])

 		{

 			m_ties.clear();

 			highest = i;

 		} else if (m_counts[i] == m_counts[highest]) {

 			m_ties.push_back(i);

 		}

 	}

 	if (m_ties.size())

 	{

 		m_ties.push_back(highest);

 		srand(static_cast<unsigned int>(time(NULL)));

 		highest = m_ties[rand() % m_ties.size()];

 	}

 	m_pVoteHandler->OnMenuVoteEnd(menu, highest);

 	g_Menus.FreeVoteHandler(this);

 }

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

  *******************************

  ******** MENU MANAGER *********

  *******************************

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

 MenuManager::MenuManager()

 {

 	m_ShowMenu = -1;

 	m_pDefaultStyle = NULL;

 }

 void MenuManager::OnSourceModAllInitialized()

 {

 	int num = g_SMAPI->GetUserMessageCount();

 	if (num >= 1)

 	{

 		for (int i=0; i<num; i++)

 		{

 			if (strcmp(g_SMAPI->GetUserMessage(i, NULL), "ShowMenu") == 0)

 			{

 				m_ShowMenu = i;

 				break;

 			}

 		}

 	}

 	/* :TODO: styles */

 	m_Styles.push_back(&g_ValveMenuStyle);

 	SetDefaultStyle(&g_ValveMenuStyle);

 }

 void MenuManager::OnSourceModAllShutdown()

 {

 	while (!m_BroadcastHandlers.empty())

 	{

 		delete m_BroadcastHandlers.front();

 		m_BroadcastHandlers.pop();

 	}

 	while (!m_VoteHandlers.empty())

 	{

 		delete m_VoteHandlers.front();

 		m_VoteHandlers.pop();

 	}

 }

 bool MenuManager::SetDefaultStyle(IMenuStyle *style)

 {

 	if (!style)

 	{

 		return false;

 	}

 	m_pDefaultStyle = style;

 	return true;

 }

 IMenuStyle *MenuManager::GetStyle(unsigned int index)

 {

 	if (index >= GetStyleCount())

 	{

 		return NULL;

 	}

 	return m_Styles[index];

 }

 unsigned int MenuManager::GetStyleCount()

 {

 	return (unsigned int)m_Styles.size();

 }

 IMenuStyle *MenuManager::FindStyleByName(const char *name)

 {

 	unsigned int count = GetStyleCount();

 	for (unsigned int i=0; i<count; i++)

 	{

 		IMenuStyle *ptr = GetStyle(i);

 		if (strcasecmp(ptr->GetStyleName(), name) == 0)

 		{

 			return ptr;

 		}

 	}

 	return NULL;

 }

 inline bool IsSlotItem(IMenuDisplay *display,

 					   unsigned int style)

 {

 	if (!display->CanDrawItem(style))

 	{

 	return false;

 	}

 	if ((style & ITEMDRAW_IGNORE) == ITEMDRAW_IGNORE)

 	{

 		return false;

 	}

 	if (style & ITEMDRAW_RAWLINE)

 	{

 		return false;

 	}

 	return true;

 }

 IMenuDisplay *MenuManager::RenderMenu(int client, menu_states_t &md, ItemOrder order)

 {

 	IBaseMenu *menu = md.menu;

 	if (!menu)

 	{

 		return NULL;

 	}

 	struct

 	{

 		unsigned int position;

 		ItemDrawInfo draw;

 	} drawItems[10];

 	/* Figure out how many items to draw */

 	IMenuStyle *style = menu->GetDrawStyle();

 	unsigned int pgn = menu->GetPagination();

 	unsigned int maxItems = style->GetMaxPageItems();

 	if (pgn != MENU_NO_PAGINATION)

 	{

 		maxItems = pgn;

 	}

 	unsigned int totalItems = menu->GetItemCount();

 	unsigned int startItem = 0;

 	/* For pagination, find the starting point. */

 	if (pgn != MENU_NO_PAGINATION)

 	{

 		if (order == ItemOrder_Ascending)

 		{

 			startItem = md.lastItem;

 			/* This shouldn't happen with well-coded menus.

 			 * If the item is out of bounds, switch the order to

 			 * Items_Descending and make us start from the top.

 			 */

 			if (startItem >= totalItems)

 			{

 				startItem = totalItems - 1;

 				order = ItemOrder_Descending;

 			}

 		} else if (order == ItemOrder_Descending) {

 			startItem = md.firstItem;

 			/* This shouldn't happen with well-coded menus.

 			 * If searching backwards doesn't give us enough room,

 			 * start from the beginning and change to ascending.

 			 */

 			if (startItem <= maxItems)

 			{

 				startItem = 0;

 				order = ItemOrder_Ascending;

 			}

 		}

 	}

 	/* Get our Display pointer and initialize some crap */

 	IMenuDisplay *display = menu->CreateDisplay();

 	IMenuHandler *mh = md.mh;

 	bool foundExtra = false;

 	unsigned int extraItem = 0;

 	/**

 	 * We keep searching until:

 	 * 1) There are no more items

 	 * 2) We reach one OVER the maximum number of slot items

 	 * 3) We have reached maxItems and pagination is MENU_NO_PAGINATION

 	 */

 	unsigned int i = startItem;

 	unsigned int foundItems = 0;

 	while (true)

 	{

 		ItemDrawInfo &dr = drawItems[foundItems].draw;

 		/* Is the item valid? */

 		if (menu->GetItemInfo(i, &dr) != NULL)

 		{

 			/* Ask the user to change the style, if necessary */

 			mh->OnMenuDrawItem(menu, client, i, dr.style);

 			/* Check if it's renderable */

 			if (IsSlotItem(display, dr.style))

 			{

 				/* If we've already found the max number of items,

 				 * This means we should just cancel out and log our

 				 * "last item."

 				 */

 				if (foundItems >= maxItems)

 				{

 					foundExtra = true;

 					extraItem = i;

 					break;

 				}

 				drawItems[foundItems++].position = i;

 			}

 		}

 		/* If there's no pagination, stop once the menu is full. */

 		if (pgn == MENU_NO_PAGINATION)

 		{

 			/* If we've filled up, then stop */

 			if (foundItems >= maxItems)

 			{

 				break;

 			}

 		}

 		/* If we're descending and this is the first item, stop */

 		if (order == ItemOrder_Descending)

 		{

 			if (i == 0)

 			{

 				break;

 			}

 			i--;

 		} 

 		/* If we're ascending and this is the last item, stop */

 		else if (order == ItemOrder_Ascending)

 		{

 			if (i >= totalItems - 1)

 			{

 				break;

 			}

 			i++;

 		}

 	}

 	/* There were no items to draw! */

 	if (!foundItems)

 	{

 		display->DeleteThis();

 		return NULL;

 	}

 	/* Check initial buttons */

 	bool displayPrev = false;

 	bool displayNext = false;

 	if (foundExtra)

 	{

 		if (order == ItemOrder_Descending)

 		{

 			displayPrev = true;

 			md.firstItem = extraItem;

 		} else if (order == ItemOrder_Ascending) {

 			displayNext = true;

 			md.lastItem = extraItem;

 		}

 	}

 	/**

 	 * If we're paginated, we have to find if there is another page.

 	 * Sadly, the only way to do this is to try drawing more items!

 	 */

 	if (pgn != MENU_NO_PAGINATION)

 	{

 		unsigned int lastItem = 0;

 		ItemDrawInfo dr;

 		/* Find the last feasible item to search from. */

 		if (order == ItemOrder_Descending)

 		{

 			lastItem = drawItems[0].position;

 			if (lastItem >= totalItems - 1)

 			{

 				goto skip_search;

 			}

 			while (++lastItem < totalItems)

 			{

 				if (menu->GetItemInfo(lastItem, &dr) != NULL)

 				{

 					mh->OnMenuDrawItem(menu, client, lastItem, dr.style);

 					if (IsSlotItem(display, dr.style))

 					{

 						displayNext = true;

 						md.lastItem = lastItem;

 						break;

 					}

 				}

 			}

 		} else if (order == ItemOrder_Ascending) {

 			lastItem = drawItems[0].position;

 			if (lastItem == 0)

 			{

 				goto skip_search;

 			}

 			lastItem--;

 			while (lastItem-- != 0)

 			{

 				if (menu->GetItemInfo(lastItem, &dr) != NULL)

 				{

 					mh->OnMenuDrawItem(menu, client, lastItem, dr.style);

 					if (IsSlotItem(display, dr.style))

 					{

 						displayPrev = true;

 						md.firstItem = lastItem;

 						break;

 					}

 				}

 			}

 		}

 	}

 skip_search:

 	/* Draw the item according to the order */

 	menu_slots_t *slots = md.slots;

 	unsigned int position = 0;			/* Keep track of the last position */

 	if (order == ItemOrder_Ascending)

 	{

 		for (unsigned int i=0; i<foundItems; i++)

 		{

 			ItemDrawInfo &dr = drawItems[i].draw;

 			menu->GetItemInfo(drawItems[i].position, &dr);

 			mh->OnMenuDisplayItem(menu, client, drawItems[i].position, &(dr.display));

 			if ((position = display->DrawItem(dr)) != 0)

 			{

 				slots[position].item = drawItems[i].position;

 				slots[position].type = ItemSel_Item;

 			}

 		}

 	} else if (order == ItemOrder_Descending) {

 		unsigned int i = foundItems;

 		/* NOTE: There will always be at least one item because

 		 * of the check earlier.

 		 */

 		while (i--)

 		{

 			ItemDrawInfo &dr = drawItems[i].draw;

 			menu->GetItemInfo(drawItems[i].position, &dr);

 			mh->OnMenuDisplayItem(menu, client, drawItems[i].position, &(dr.display));

 			if ((position = display->DrawItem(dr)) != 0)

 			{

 				slots[position].item = drawItems[i].position;

 				slots[position].type = ItemSel_Item;

 			}

 		}

 	}

 	/* Now, we need to check if we need to add anything extra */

 	if (pgn != MENU_NO_PAGINATION)

 	{

 		bool canDrawDisabled = display->CanDrawItem(ITEMDRAW_DISABLED);

 		bool exitButton = menu->GetExitButton();

 		char text[50];

 		/* Calculate how many items we are allowed for control stuff */

 		unsigned int padding = style->GetMaxPageItems() - maxItems;

 		/* Add the number of available slots */

 		padding += (maxItems - foundItems);

 		/* Someday, if we are able to re-enable this, we will be very lucky men. */

 #if 0

 		if (!style->FeatureExists(MenuStyleFeature_ImplicitExit))

 		{

 #endif

 		/* Even if we don't draw an exit button, we invalidate the slot. */

 		padding--;

 #if 0

 		} else {

 			/* Otherwise, we don't draw anything and leave the slot available */

 			exitButton = false;

 		}

 #endif

 		/* Subtract two slots for the displayNext/displayPrev padding */

 		padding -= 2;

 		/**

 		 * We allow next/prev to be undrawn if neither exists.

 		 * Thus, we only need padding if one of them will be drawn,

 		 * or the exit button will be drawn.

 		 */

 		ItemDrawInfo padItem(NULL, ITEMDRAW_SPACER);

 		if (exitButton || (displayNext || displayPrev))

 		{

 			/* Add spacers so we can pad to the end */

 			unsigned int null_pos = 0;

 			for (unsigned int i=0; i<padding; i++)

 			{

 				position = display->DrawItem(padItem);

 				slots[position].type = ItemSel_None;

 			}

 		}

 		/* Put a fake spacer before control stuff, if possible */

 		{

 			ItemDrawInfo draw("", ITEMDRAW_RAWLINE|ITEMDRAW_SPACER);

 			display->DrawItem(draw);

 		}

 		/* PREVIOUS */

 		ItemDrawInfo dr(text, 0);

 		if (displayPrev || canDrawDisabled)

 		{

 			CorePlayerTranslate(client, text, sizeof(text), "Back", NULL);

 			dr.style = displayPrev ? 0 : ITEMDRAW_DISABLED;

 			position = display->DrawItem(dr);

 			slots[position].type = ItemSel_Back;

 		} else if ((displayNext || canDrawDisabled) || exitButton) {

 			/* If we can't display this, 

 			 * but there is a "next" or "exit" button, we need to pad!

 			 */

 			position = display->DrawItem(padItem);

 			slots[position].type = ItemSel_None;

 		}

 		/* NEXT */

 		if (displayNext || canDrawDisabled)

 		{

 			CorePlayerTranslate(client, text, sizeof(text), "Next", NULL);

 			dr.style = displayNext ? 0 : ITEMDRAW_DISABLED;

 			position = display->DrawItem(dr);

 			slots[position].type = ItemSel_Next;

 		} else if (exitButton) {

 			/* If we can't display this,

 			 * but there is an exit button, we need to pad!

 			 */

 			position = display->DrawItem(padItem);

 			slots[position].type = ItemSel_None;

 		}

 		/* EXIT */

 		if (exitButton)

 		{

 			CorePlayerTranslate(client, text, sizeof(text), "Exit", NULL);

 			dr.style = 0;

 			position = display->DrawItem(dr);

 			slots[position].type = ItemSel_Exit;

 		}

 	}

 	/* Lastly, fill in any slots we could have missed */

 	for (unsigned int i = position + 1; i < 10; i++)

 	{

 		slots[i].type = ItemSel_None;

 	}

 	/* Do title stuff */

 	mh->OnMenuDisplay(menu, client, display);

 	display->DrawTitle(menu->GetDefaultTitle(), true);

 	return display;

 }

 unsigned int MenuManager::BroadcastMenu(IBaseMenu *menu, 

 										IMenuHandler *handler, 

 										int clients[], 

 										unsigned int numClients, 

 										unsigned int time)

 {

 	BroadcastHandler *bh;

 	if (m_BroadcastHandlers.empty())

 	{

 		bh = new BroadcastHandler(handler);

 	} else {

 		bh = m_BroadcastHandlers.front();

 		m_BroadcastHandlers.pop();

 		bh->m_pHandler = handler;

 		bh->numClients = 0;

 	}

 	handler->OnMenuStart(menu);

 	unsigned int total = 0;

 	for (unsigned int i=0; i<numClients; i++)

 	{

 		/* Only continue if displaying works */

 		if (!menu->Display(clients[i], bh, time))

 		{

 			continue;

 		}

 		/* :TODO: Allow sourcetv only, not all bots */

 		CPlayer *player = g_Players.GetPlayerByIndex(clients[i]);

 		if (player->IsFakeClient())

 		{

 			continue;

 		}

 		total++;

 	}

 	if (!total)

 	{

 		/* End the broadcast here */

 		handler->OnMenuEnd(menu);

 		FreeBroadcastHandler(bh);

 	}

 	return total;

 }

 unsigned int MenuManager::VoteMenu(IBaseMenu *menu,

 								   IMenuVoteHandler *handler,

 								   int clients[],

 								   unsigned int numClients,

 								   unsigned int time)

 {

 	VoteHandler *vh;

 	if (m_VoteHandlers.empty())

 	{

 		vh = new VoteHandler(handler);

 	} else {

 		vh = m_VoteHandlers.front();

 		m_VoteHandlers.pop();

 		vh->m_pHandler = handler;

 		vh->numClients = 0;

 	}

 	vh->Initialize(menu);

 	handler->OnMenuStart(menu);

 	unsigned int total = 0;

 	for (unsigned int i=0; i<numClients; i++)

 	{

 		/* Only continue if displaying works */

 		if (!menu->Display(clients[i], vh, time))

 		{

 			continue;

 		}

 		/* :TODO: Allow sourcetv only, not all bots */

 		CPlayer *player = g_Players.GetPlayerByIndex(clients[i]);

 		if (player->IsFakeClient())

 		{

 			continue;

 		}

 		total++;

 	}

 	if (!total)

 	{

 		/* End the broadcast here */

 		handler->OnMenuEnd(menu);

 		FreeVoteHandler(vh);

 	}

 	return total;

 }

 void MenuManager::FreeBroadcastHandler(BroadcastHandler *bh)

 {

 	m_BroadcastHandlers.push(bh);

 }

 void MenuManager::FreeVoteHandler(VoteHandler *vh)

 {

 	m_VoteHandlers.push(vh);

 }

 IMenuStyle *MenuManager::GetDefaultStyle()

 {

 	return m_pDefaultStyle;

 }