/**
 * 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 "sm_stringutil.h"
#include "MenuStyle_Base.h"
#include "PlayerManager.h"
#include "MenuManager.h"
#include "HandleSys.h"

BaseMenuStyle::BaseMenuStyle() : m_WatchList(256), m_hHandle(BAD_HANDLE)
{
}

Handle_t BaseMenuStyle::GetHandle()
{
	/* Don't create the handle until we need it */
	if (m_hHandle == BAD_HANDLE)
	{
		m_hHandle = g_Menus.CreateStyleHandle(this);
	}

	return m_hHandle;
}

void BaseMenuStyle::AddClientToWatch(int client)
{
	m_WatchList.push_back(client);
}

void BaseMenuStyle::RemoveClientFromWatch(int client)
{
	m_WatchList.remove(client);
}

void BaseMenuStyle::_CancelClientMenu(int client, bool bAutoIgnore/* =false */, MenuCancelReason reason/* =MenuCancel_Interrupt */)
{
	CBaseMenuPlayer *player = GetMenuPlayer(client);
	menu_states_t &states = player->states;

	bool bOldIgnore = player->bAutoIgnore;
	if (bAutoIgnore)
	{
		player->bAutoIgnore = true;
	}

	/* Save states */
	IMenuHandler *mh = states.mh;
	IBaseMenu *menu = states.menu;

	/* Clear menu */
	player->bInMenu = false;
	if (player->menuHoldTime)
	{
		RemoveClientFromWatch(client);
	}

	/* Fire callbacks */
	mh->OnMenuCancel(menu, client, reason);
	
	/* Only fire end if there's a valid menu */
	if (menu)
	{
		mh->OnMenuEnd(menu);
	}

	if (bAutoIgnore)
	{
		player->bAutoIgnore = bOldIgnore;
	}
}

void BaseMenuStyle::CancelMenu(CBaseMenu *menu)
{
	int maxClients = g_Players.GetMaxClients();
	for (int i=1; i<=maxClients; i++)
	{
		CBaseMenuPlayer *player = GetMenuPlayer(i);
		if (player->bInMenu)
		{
			menu_states_t &states = player->states;
			if (states.menu == menu)
			{
				_CancelClientMenu(i);
			}
		}
	}
}

bool BaseMenuStyle::CancelClientMenu(int client, bool autoIgnore)
{
	if (client < 1 || client > g_Players.MaxClients())
	{
		return false;
	}

	CBaseMenuPlayer *player = GetMenuPlayer(client);
	if (!player->bInMenu)
	{
		return false;
	}

	_CancelClientMenu(client, autoIgnore);

	return true;
}

MenuSource BaseMenuStyle::GetClientMenu(int client, void **object)
{
	if (client < 1 || client > g_Players.GetMaxClients())
	{
		return MenuSource_None;
	}

	CBaseMenuPlayer *player = GetMenuPlayer(client);

	if (player->bInMenu)
	{
		IBaseMenu *menu;
		if ((menu=player->states.menu) != NULL)
		{
			if (object)
			{
				*object = menu;
			}
			return MenuSource_BaseMenu;
		}

		return MenuSource_Display;
	} else if (player->bInExternMenu) {
		if (player->menuHoldTime != 0
			&& (gpGlobals->curtime > player->menuStartTime + player->menuHoldTime))
		{
			player->bInExternMenu = false;
			return MenuSource_None;
		}
		return MenuSource_External;
	}

	return MenuSource_None;
}

void BaseMenuStyle::OnClientDisconnected(int client)
{
	CBaseMenuPlayer *player = GetMenuPlayer(client);
	if (!player->bInMenu)
	{
		return;
	}

	_CancelClientMenu(client, true, MenuCancel_Disconnect);

	player->bInMenu = false;
	player->bInExternMenu = false;
}

static int do_lookup[256];
void BaseMenuStyle::ProcessWatchList()
{
	if (!m_WatchList.size())
	{
		return;
	}

	unsigned int total = 0;
	for (FastLink<int>::iterator iter=m_WatchList.begin(); iter!=m_WatchList.end(); ++iter)
	{
		do_lookup[total++] = (*iter);
	}

	int client;
	CBaseMenuPlayer *player;
	float curTime = gpGlobals->curtime;
	for (unsigned int i=0; i<total; i++)
	{
		client = do_lookup[i];
		player = GetMenuPlayer(client);
		if (!player->bInMenu || !player->menuHoldTime)
		{
			m_WatchList.remove(client);
			continue;
		}
		if (curTime > player->menuStartTime + player->menuHoldTime)
		{
			_CancelClientMenu(client, false);
		}
	}
}

void BaseMenuStyle::ClientPressedKey(int client, unsigned int key_press)
{
	CBaseMenuPlayer *player = GetMenuPlayer(client);

	/* First question: Are we in a menu? */
	if (!player->bInMenu)
	{
		return;
	}

	bool cancel = false;
	unsigned int item = 0;
	MenuCancelReason reason = MenuCancel_Exit;
	menu_states_t &states = player->states;

	assert(states.mh != NULL);

	if (states.menu == NULL)
	{
		item = key_press;
	} else if (key_press < 1 || key_press > GetMaxPageItems()) {
		cancel = true;
	} else {
		ItemSelection type = states.slots[key_press].type;

		/* For navigational items, we're going to redisplay */
		if (type == ItemSel_Back)
		{
			if (!RedoClientMenu(client, ItemOrder_Descending))
			{
				cancel = true;
				reason = MenuCancel_NoDisplay;
			} else {
				return;
			}
		} else if (type == ItemSel_Next) {
			if (!RedoClientMenu(client, ItemOrder_Ascending))
			{
				cancel = true;						/* I like Saltines. */
				reason = MenuCancel_NoDisplay;
			} else {
				return;
			}
		} else if (type == ItemSel_Exit || type == ItemSel_None) {
			cancel = true;
		} else {
			item = states.slots[key_press].item;
		}
	}

	/* Save variables */
	IMenuHandler *mh = states.mh;
	IBaseMenu *menu = states.menu;

	/* Clear states */
	player->bInMenu = false;
	if (player->menuHoldTime)
	{
		RemoveClientFromWatch(client);
	}

	if (cancel)
	{
		mh->OnMenuCancel(menu, client, reason);
	} else {
		mh->OnMenuSelect(menu, client, item);
	}

	/* Only fire end for valid menus */
	if (menu)
	{
		mh->OnMenuEnd(menu);
	}
}

bool BaseMenuStyle::DoClientMenu(int client, IMenuPanel *menu, IMenuHandler *mh, unsigned int time)
{
	CPlayer *pPlayer = g_Players.GetPlayerByIndex(client);
	if (!pPlayer || pPlayer->IsFakeClient() || !pPlayer->IsInGame())
	{
		return false;
	}

	CBaseMenuPlayer *player = GetMenuPlayer(client);
	if (player->bAutoIgnore)
	{
		return false;
	}

	/* For the duration of this, we are going to totally ignore whether
	* the player is already in a menu or not (except to cancel the old one).
	* Instead, we are simply going to ignore any further menu displays, so
	* this display can't be interrupted.
	*/
	player->bAutoIgnore = true;

	/* Cancel any old menus */
	menu_states_t &states = player->states;
	if (player->bInMenu)
	{
		_CancelClientMenu(client, true);
	}

	states.firstItem = 0;
	states.lastItem = 0;
	states.menu = NULL;
	states.mh = mh;
	states.apiVers = SMINTERFACE_MENUMANAGER_VERSION;
	player->bInMenu = true;
	player->bInExternMenu = false;
	player->menuStartTime = gpGlobals->curtime;
	player->menuHoldTime = time;

	if (time)
	{
		AddClientToWatch(client);
	}

	/* Draw the display */
	SendDisplay(client, menu);

	/* We can be interrupted again! */
	player->bAutoIgnore = false;

	return true;
}

bool BaseMenuStyle::DoClientMenu(int client, CBaseMenu *menu, IMenuHandler *mh, unsigned int time)
{
	mh->OnMenuStart(menu);

	if (!mh)
	{
		mh->OnMenuCancel(menu, client, MenuCancel_NoDisplay);
		mh->OnMenuEnd(menu);
		return false;
	}

	CPlayer *pPlayer = g_Players.GetPlayerByIndex(client);
	if (!pPlayer || pPlayer->IsFakeClient() || !pPlayer->IsInGame())
	{
		mh->OnMenuCancel(menu, client, MenuCancel_NoDisplay);
		mh->OnMenuEnd(menu);
		return false;
	}

	CBaseMenuPlayer *player = GetMenuPlayer(client);
	if (player->bAutoIgnore)
	{
		mh->OnMenuCancel(menu, client, MenuCancel_NoDisplay);
		mh->OnMenuEnd(menu);
		return false;
	}

	/* For the duration of this, we are going to totally ignore whether
	* the player is already in a menu or not (except to cancel the old one).
	* Instead, we are simply going to ignore any further menu displays, so
	* this display can't be interrupted.
	*/
	player->bAutoIgnore = true;

	/* Cancel any old menus */
	menu_states_t &states = player->states;
	if (player->bInMenu)
	{
		_CancelClientMenu(client, true);
	}

	states.firstItem = 0;
	states.lastItem = 0;
	states.menu = menu;
	states.mh = mh;
	states.apiVers = SMINTERFACE_MENUMANAGER_VERSION;

	IMenuPanel *display = g_Menus.RenderMenu(client, states, ItemOrder_Ascending);
	if (!display)
	{
		player->bAutoIgnore = false;
		player->bInMenu = false;
		mh->OnMenuCancel(menu, client, MenuCancel_NoDisplay);
		mh->OnMenuEnd(menu);
		return false;
	}

	/* Finally, set our states */
	player->bInMenu = true;
	player->bInExternMenu = false;
	player->menuStartTime = gpGlobals->curtime;
	player->menuHoldTime = time;

	if (time)
	{
		AddClientToWatch(client);
	}

	/* Draw the display */
	SendDisplay(client, display);

	/* Free the display pointer */
	display->DeleteThis();

	/* We can be interrupted again! */
	player->bAutoIgnore = false;

	return true;
}

bool BaseMenuStyle::RedoClientMenu(int client, ItemOrder order)
{
	CBaseMenuPlayer *player = GetMenuPlayer(client);
	menu_states_t &states = player->states;

	player->bAutoIgnore = true;
	IMenuPanel *display = g_Menus.RenderMenu(client, states, order);
	if (!display)
	{
		if (player->menuHoldTime)
		{
			RemoveClientFromWatch(client);
		}
		player->bAutoIgnore = false;
		return false;
	}

	SendDisplay(client, display);

	display->DeleteThis();

	player->bAutoIgnore = false;

	return true;
}

CBaseMenu::CBaseMenu(IMenuHandler *pHandler, IMenuStyle *pStyle, IdentityToken_t *pOwner) : 
m_pStyle(pStyle), m_Strings(512), m_Pagination(7), m_ExitButton(true), 
m_bShouldDelete(false), m_bCancelling(false), m_pOwner(pOwner ? pOwner : g_pCoreIdent), 
m_bDeleting(false), m_bWillFreeHandle(false), m_hHandle(BAD_HANDLE), m_pHandler(pHandler),
m_pVoteHandler(NULL)
{
}

CBaseMenu::~CBaseMenu()
{
	g_Menus.ReleaseVoteWrapper(m_pVoteHandler);
}

Handle_t CBaseMenu::GetHandle()
{
	if (!m_hHandle)
	{
		m_hHandle = g_Menus.CreateMenuHandle(this, m_pOwner);
	}

	return m_hHandle;
}

bool CBaseMenu::AppendItem(const char *info, const ItemDrawInfo &draw)
{
	if (m_Pagination == (unsigned)MENU_NO_PAGINATION
		&& m_items.size() >= m_pStyle->GetMaxPageItems())
	{
		return false;
	}

	CItem item;

	item.infoString = m_Strings.AddString(info);
	if (draw.display)
	{
		item.displayString = m_Strings.AddString(draw.display);
	}
	item.style = draw.style;


	m_items.push_back(item);

	return true;
}

bool CBaseMenu::InsertItem(unsigned int position, const char *info, const ItemDrawInfo &draw)
{
	if (m_Pagination == (unsigned)MENU_NO_PAGINATION
		&& m_items.size() >= m_pStyle->GetMaxPageItems())
	{
		return false;
	}

	if (position >= m_items.size())
	{
		return false;
	}

	CItem item;
	item.infoString = m_Strings.AddString(info);
	if (draw.display)
	{
		item.displayString = m_Strings.AddString(draw.display);
	}
	item.style = draw.style;

	CVector<CItem>::iterator iter = m_items.iterAt(position);
	m_items.insert(iter, item);

	return true;
}

bool CBaseMenu::RemoveItem(unsigned int position)
{
	if (position >= m_items.size())
	{
		return false;
	}

	m_items.erase(m_items.iterAt(position));

	if (m_items.size() == 0)
	{
		m_Strings.Reset();
	}

	return true;
}

void CBaseMenu::RemoveAllItems()
{
	m_items.clear();
	m_Strings.Reset();
}

const char *CBaseMenu::GetItemInfo(unsigned int position, ItemDrawInfo *draw/* =NULL */)
{
	if (position >= m_items.size())
	{
		return NULL;
	}

	if (draw)
	{
		draw->display = m_Strings.GetString(m_items[position].displayString);
		draw->style = m_items[position].style;
	}

	return m_Strings.GetString(m_items[position].infoString);
}

unsigned int CBaseMenu::GetItemCount()
{
	return m_items.size();
}

bool CBaseMenu::SetPagination(unsigned int itemsPerPage)
{
	if (itemsPerPage > 7 || itemsPerPage == 1)
	{
		return false;
	}

	m_Pagination = itemsPerPage;

	return true;
}

unsigned int CBaseMenu::GetPagination()
{
	return m_Pagination;
}

IMenuStyle *CBaseMenu::GetDrawStyle()
{
	return m_pStyle;
}

void CBaseMenu::SetDefaultTitle(const char *message)
{
	m_Title.assign(message);
}

const char *CBaseMenu::GetDefaultTitle()
{
	return m_Title.c_str();
}

bool CBaseMenu::GetExitButton()
{
	return m_ExitButton;
}

bool CBaseMenu::SetExitButton(bool set)
{
	m_ExitButton = set;
	return true;
}

void CBaseMenu::Cancel()
{
	if (m_bCancelling)
	{
		return;
	}

	m_bCancelling = true;
	Cancel_Finally();
	m_bCancelling = false;

	if (m_bShouldDelete)
	{
		InternalDelete();
	}
}

void CBaseMenu::Destroy(bool releaseHandle)
{
	/* Check if we shouldn't be here */
	if (m_bDeleting)
	{
		return;
	}

	/* Save the destruction hint about our handle */
	m_bWillFreeHandle = releaseHandle;

	/* Now actually do stuff */
	if (!m_bCancelling || m_bShouldDelete)
	{
		Cancel();
		InternalDelete();
	} else {
		m_bShouldDelete = true;
	}
}

void CBaseMenu::InternalDelete()
{
	if (m_bWillFreeHandle && m_hHandle != BAD_HANDLE)
	{
		Handle_t hndl = m_hHandle;
		HandleSecurity sec;

		sec.pOwner = m_pOwner;
		sec.pIdentity = g_pCoreIdent;

		m_hHandle = BAD_HANDLE;
		m_bDeleting = true;
		g_HandleSys.FreeHandle(hndl, &sec);
	}

	m_pHandler->OnMenuDestroy(this);

	delete this;
}

bool CBaseMenu::BroadcastVote(int clients[], 
							  unsigned int numClients, 
							  unsigned int maxTime,
							  unsigned int flags)
{
	if (!m_pVoteHandler)
	{
		m_pVoteHandler = g_Menus.CreateVoteWrapper(m_pHandler);
	} else if (m_pVoteHandler->IsVoteInProgress()) {
		return false;
	}

	m_pVoteHandler->InitializeVoting(this);

	for (unsigned int i=0; i<numClients; i++)
	{
		VoteDisplay(clients[i], maxTime);
	}

	m_pVoteHandler->StartVoting();

	return true;
}

bool CBaseMenu::IsVoteInProgress()
{
	return (m_pVoteHandler && m_pVoteHandler->IsVoteInProgress());
}