/**

 * 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 <time.h>

#include <stdarg.h>

#include <stdlib.h>

#include "MenuManager.h"

#include "sm_stringutil.h"

#include "sourcemm_api.h"

#include "PlayerManager.h"

#include "MenuStyle_Valve.h"

#include "ShareSys.h"

#include "HandleSys.h"

MenuManager g_Menus;

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

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

 ******** VOTE HANDLER *********

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

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

unsigned int VoteMenuHandler::GetMenuAPIVersion2()

{

	return m_pHandler->GetMenuAPIVersion2();

}

bool VoteMenuHandler::IsVoteInProgress()

{

	return (m_pCurMenu != NULL);

}

void VoteMenuHandler::InitializeVoting(IBaseMenu *menu)

{

	m_Items = menu->GetItemCount();

	if (m_Votes.size() < (size_t)m_Items)

	{

		/* Only clear the items we need to... */

		size_t size = m_Votes.size();

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

		{

			m_Votes[i] = 0;

		}

		m_Votes.resize(m_Items, 0);

	} else {

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

		{

			m_Votes[i] = 0;

		}

	}

	m_pCurMenu = menu;

	m_pHandler->OnMenuStart(m_pCurMenu);

}

void VoteMenuHandler::StartVoting()

{

	m_bStarted = true;

	m_pHandler->OnMenuVoteStart(m_pCurMenu);

	/* By now we know how many clients were set.  

	 * If there are none, we should end IMMEDIATELY.

	 */

	if (m_Clients == 0)

	{

		EndVoting();

	}

}

void VoteMenuHandler::DecrementPlayerCount()

{

	assert(m_Clients > 0);

	m_Clients--;

	if (m_bStarted && m_Clients == 0)

	{

		EndVoting();

	}

}

void VoteMenuHandler::EndVoting()

{

	if (m_bCancelled)

	{

		/* If we were cancelled, don't bother tabulating anything.

		 * Reset just in case someone tries to redraw, which means

		 * we need to save our states.

		 */

		IBaseMenu *menu = m_pCurMenu;

		InternalReset();

		m_pHandler->OnMenuVoteCancel(menu);

		m_pHandler->OnMenuEnd(menu);

		return;

	}

	unsigned int chosen = 0;

	unsigned int highest = 0;

	unsigned int dup_count = 0;

	/* If we got zero votes, take a shortcut. */

	if (m_NumVotes == 0)

	{

		/* Pick a random item and then jump far, far away. */

		srand((unsigned int)(time(NULL)));

		chosen = (unsigned int)rand() % m_Items;

		goto picked_item;

	}

	/* We can't have more dups than this!

	 * This is the max number of players.

	 */

	unsigned int dup_array[256];

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

	{

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

		{

			/* If we have a new highest count, mark it and trash the duplicate

			 * list by setting the total to 0.

			 */

			highest = i;

			dup_count = 0;

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

			/* If they're equal, mark it in the duplicate list.

			 * We'll add in the original later.

			 */

			dup_array[dup_count++] = i;

		}

	}

	/* Check if we need to pick from the duplicate list */

	if (dup_count)

	{

		/* Re-add the original to the list because it's not in there. */

		dup_array[dup_count++] = highest;

		/* Pick a random slot. */

		srand((unsigned int)(time(NULL)));

		unsigned int r = (unsigned int)rand() % dup_count;

		/* Pick the item. */

		chosen = dup_array[r];

	} else {

		chosen = highest;

	}

picked_item:

	m_pHandler->OnMenuVoteEnd(m_pCurMenu, chosen);

	m_pHandler->OnMenuEnd(m_pCurMenu);

	InternalReset();

}

void VoteMenuHandler::OnMenuStart(IBaseMenu *menu)

{

	m_Clients++;

}

void VoteMenuHandler::OnMenuEnd(IBaseMenu *menu)

{

	DecrementPlayerCount();

}

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

{

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

}

void VoteMenuHandler::OnMenuDisplay(IBaseMenu *menu, int client, IMenuPanel *display)

{

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

}

void VoteMenuHandler::OnMenuDisplayItem(IBaseMenu *menu, int client, unsigned int item, const char **display)

{

	m_pHandler->OnMenuDisplayItem(menu, client, item, display);

}

void VoteMenuHandler::OnMenuDrawItem(IBaseMenu *menu, int client, unsigned int item, unsigned int &style)

{

	m_pHandler->OnMenuDrawItem(menu, client, item, style);

}

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

{

	/* Check by our item count, NOT the vote array size */

	if (item < m_Items)

	{

		m_Votes[item]++;

		m_NumVotes++;

	}

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

}

void VoteMenuHandler::Reset(IMenuHandler *mh)

{

	m_pHandler = mh;

	InternalReset();

}

void VoteMenuHandler::InternalReset()

{

	m_Clients = 0;

	m_Items = 0;

	m_bStarted = false;

	m_pCurMenu = NULL;

	m_NumVotes = 0;

	m_bCancelled = false;

}

void VoteMenuHandler::CancelVoting()

{

	m_bCancelled = true;

}

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

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

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

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

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

MenuManager::MenuManager()

{

	m_Styles.push_back(&g_ValveMenuStyle);

	SetDefaultStyle(&g_ValveMenuStyle);

}

void MenuManager::OnSourceModAllInitialized()

{

	g_ShareSys.AddInterface(NULL, this);

	HandleAccess access;

	g_HandleSys.InitAccessDefaults(NULL, &access);

	/* Deny cloning to menus */

	access.access[HandleAccess_Clone] = HANDLE_RESTRICT_OWNER|HANDLE_RESTRICT_IDENTITY;

	m_MenuType = g_HandleSys.CreateType("IBaseMenu", this, 0, NULL, &access, g_pCoreIdent, NULL);

	/* Also deny deletion to styles */

	access.access[HandleAccess_Delete] = HANDLE_RESTRICT_OWNER|HANDLE_RESTRICT_IDENTITY;

	m_StyleType = g_HandleSys.CreateType("IMenuStyle", this, 0, NULL, &access, g_pCoreIdent, NULL);

}

void MenuManager::OnSourceModAllShutdown()

{

	g_HandleSys.RemoveType(m_MenuType, g_pCoreIdent);

	g_HandleSys.RemoveType(m_StyleType, g_pCoreIdent);

	while (!m_VoteHandlers.empty())

	{

		delete m_VoteHandlers.front();

		m_VoteHandlers.pop();

	}

}

void MenuManager::OnHandleDestroy(HandleType_t type, void *object)

{

	if (type == m_MenuType)

	{

		IBaseMenu *menu = (IBaseMenu *)object;

		menu->Destroy(false);

	} else if (type == m_StyleType) {

		/* Do nothing */

	}

}

Handle_t MenuManager::CreateMenuHandle(IBaseMenu *menu, IdentityToken_t *pOwner)

{

	if (m_MenuType == NO_HANDLE_TYPE)

	{

		return BAD_HANDLE;

	}

	return g_HandleSys.CreateHandle(m_MenuType, menu, pOwner, g_pCoreIdent, NULL);

}

Handle_t MenuManager::CreateStyleHandle(IMenuStyle *style)

{

	if (m_StyleType == NO_HANDLE_TYPE)

	{

		return BAD_HANDLE;

	}

	return g_HandleSys.CreateHandle(m_StyleType, style, g_pCoreIdent, g_pCoreIdent, NULL);

}

HandleError MenuManager::ReadMenuHandle(Handle_t handle, IBaseMenu **menu)

{

	HandleSecurity sec;

	sec.pIdentity = g_pCoreIdent;

	sec.pOwner = NULL;

	return g_HandleSys.ReadHandle(handle, m_MenuType, &sec, (void **)menu);

}

HandleError MenuManager::ReadStyleHandle(Handle_t handle, IMenuStyle **style)

{

	HandleSecurity sec;

	sec.pIdentity = g_pCoreIdent;

	sec.pOwner = g_pCoreIdent;

	return g_HandleSys.ReadHandle(handle, m_StyleType, &sec, (void **)style);

}

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];

}

void MenuManager::AddStyle(IMenuStyle *style)

{

	m_Styles.push_back(style);

}

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(IMenuPanel *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;

}

IMenuPanel *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 */

	IMenuPanel *display = menu->CreatePanel();

	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--)