//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
// $NoKeywords: $
//=============================================================================//

// Author: Michael S. Booth (mike@turtlerockstudios.com), 2003

#include "cbase.h"
#include "cs_simple_hostage.h"
#include "cs_bot.h"
#include "cs_gamerules.h"

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"

//--------------------------------------------------------------------------------------------------------------
/**
 * Move to a potentially far away position.
 */
void MoveToState::OnEnter( CCSBot *me )
{
	if (me->IsUsingKnife() && me->IsWellPastSafe() && !me->IsHurrying())
	{
		me->Walk();
	}
	else
	{
		me->Run();
	}


	// if we need to find the bomb, get there as quick as we can
	RouteType route;
	switch (me->GetTask())
	{
		case CCSBot::FIND_TICKING_BOMB:
		case CCSBot::DEFUSE_BOMB:
		case CCSBot::MOVE_TO_LAST_KNOWN_ENEMY_POSITION:
			route = FASTEST_ROUTE;
			break;

		default:
			route = SAFEST_ROUTE;
			break;
	}
		
	// build path to, or nearly to, goal position
	me->ComputePath( m_goalPosition, route );

	m_radioedPlan = false;
	m_askedForCover = false;
}

//--------------------------------------------------------------------------------------------------------------
/**
 * Move to a potentially far away position.
 */
void MoveToState::OnUpdate( CCSBot *me )
{
	Vector myOrigin = GetCentroid( me );

	// assume that we are paying attention and close enough to know our enemy died
	if (me->GetTask() == CCSBot::MOVE_TO_LAST_KNOWN_ENEMY_POSITION)
	{
		/// @todo Account for reaction time so we take some time to realized the enemy is dead
		CBasePlayer *victim = static_cast<CBasePlayer *>( me->GetTaskEntity() );
		if (victim == NULL || !victim->IsAlive())
		{
			me->PrintIfWatched( "The enemy I was chasing was killed - giving up.\n" );
			me->Idle();
			return;
		}
	}

	// look around
	me->UpdateLookAround();

	//
	// Scenario logic
	//
	switch (TheCSBots()->GetScenario())
	{
		case CCSBotManager::SCENARIO_DEFUSE_BOMB:
		{
			// if the bomb has been planted, find it
			// NOTE: This task is used by both CT and T's to find the bomb
			if (me->GetTask() == CCSBot::FIND_TICKING_BOMB)
			{
				if (!me->GetGameState()->IsBombPlanted())
				{
					// the bomb is not planted - give up this task
					me->Idle();
					return;
				}

				if (me->GetGameState()->GetPlantedBombsite() != CSGameState::UNKNOWN)
				{
					// we know where the bomb is planted, stop searching
					me->Idle();
					return;
				}

				// check off bombsites that we explore or happen to stumble into
				for( int z=0; z<TheCSBots()->GetZoneCount(); ++z )
				{
					// don't re-check zones
					if (me->GetGameState()->IsBombsiteClear( z ))
						continue;

					if (TheCSBots()->GetZone(z)->m_extent.Contains( myOrigin ))
					{
						// note this bombsite is clear
						me->GetGameState()->ClearBombsite( z );

						if (me->GetTeamNumber() == TEAM_CT)
						{
							// tell teammates this bombsite is clear
							me->GetChatter()->BombsiteClear( z );
						}

						// find another zone to check
						me->Idle();

						return;
					}
				}

				// move to a bombsite
				break;
			}


			if (me->GetTeamNumber() == TEAM_CT)
			{
				if (me->GetGameState()->IsBombPlanted())
				{
					switch( me->GetTask() )
					{
						case CCSBot::DEFUSE_BOMB:
						{	
							// if we are near the bombsite and there is time left, sneak in (unless all enemies are dead)
							if (me->GetEnemiesRemaining())
							{
								const float plentyOfTime = 15.0f;
								if (TheCSBots()->GetBombTimeLeft() > plentyOfTime)
								{
									// get distance remaining on our path until we reach the bombsite
									float range = me->GetPathDistanceRemaining();

									const float closeRange = 1500.0f;
									if (range < closeRange)
									{
										me->Walk();
									}
									else
									{
										me->Run();
									}
								}
							}
							else
							{
								// everyone is dead - run!
								me->Run();
							}

							// if we are trying to defuse the bomb, and someone has started defusing, guard them instead
							if (me->CanSeePlantedBomb() && TheCSBots()->GetBombDefuser())
							{
								me->GetChatter()->Say( "CoveringFriend" );
								me->Idle();
								return;
							}


							// if we are near the bomb, defuse it (if we are reloading, don't try to defuse until we finish)
							const Vector *bombPos = me->GetGameState()->GetBombPosition();
							if (bombPos && !me->IsReloading())
							{
								const float defuseRange = 100.0f;		// 50
								if ((*bombPos - me->EyePosition()).IsLengthLessThan( defuseRange ))
								{
									// make sure we can see the bomb
									if (me->IsVisible( *bombPos ))
									{
										me->DefuseBomb();
										return;
									}
								}
							}

							break;
						}

						default:
						{
							// we need to find the bomb
							me->Idle();
							return;
						}
					}
				}
			}
			else		// TERRORIST
			{
				if (me->GetTask() == CCSBot::PLANT_BOMB )
				{
					if (  me->GetFriendsRemaining() )
					{
						// if we are about to plant, radio for cover
						if (!m_askedForCover)
						{
							const float nearPlantSite = 50.0f;
							if (me->IsAtBombsite() && me->GetPathDistanceRemaining() < nearPlantSite)
							{
								// radio to the team
								me->GetChatter()->PlantingTheBomb( me->GetPlace() );
								m_askedForCover = true;
							}

							// after we have started to move to the bombsite, tell team we're going to plant, and where
							// don't do this if we have already radioed that we are starting to plant
							if (!m_radioedPlan)
							{
								const float radioTime = 2.0f;
								if (gpGlobals->curtime - me->GetStateTimestamp() > radioTime)
								{
									// radio to the team if we're more than 10 seconds (2400 units) out
									const float nearPlantSite = 2400.0f;
									if ( me->GetPathDistanceRemaining() >= nearPlantSite )
									{
										me->GetChatter()->GoingToPlantTheBomb( TheNavMesh->GetPlace( m_goalPosition ) );
									}
									m_radioedPlan = true;
								}
							}
						}
					}
				}
			}
			break;
		}

		//--------------------------------------------------------------------------------------------------
		case CCSBotManager::SCENARIO_RESCUE_HOSTAGES:
		{
			if (me->GetTask() == CCSBot::COLLECT_HOSTAGES)
			{
				//
				// Since CT's have a radar, they can directly look at the actual hostage state
				//

				// check if someone else collected our hostage, or the hostage died or was rescued
				CHostage *hostage = static_cast<CHostage *>( me->GetGoalEntity() );
				if (hostage == NULL || !hostage->IsValid() || hostage->IsFollowingSomeone())
				{
					me->Idle();
					return;
				}

				Vector hostageOrigin = GetCentroid( hostage );

				// if our hostage has moved, repath
				const float repathToleranceSq = 75.0f * 75.0f;
				float error = (hostageOrigin - m_goalPosition).LengthSqr();
				if (error > repathToleranceSq)
				{
					m_goalPosition = hostageOrigin;
					me->ComputePath( m_goalPosition, SAFEST_ROUTE );
				}

				/// @todo Generalize ladder priorities over other tasks
				if (!me->IsUsingLadder())
				{
					Vector pos = hostage->EyePosition();
					Vector to = pos - me->EyePosition(); // "Use" checks from eye position, so we should too

					// look at the hostage as we approach
					const float watchHostageRange = 100.0f;
					if (to.IsLengthLessThan( watchHostageRange ))
					{
						me->SetLookAt( "Hostage", pos, PRIORITY_LOW, 0.5f );

						// randomly move just a bit to avoid infinite use loops from bad hostage placement
						NavRelativeDirType dir = (NavRelativeDirType)RandomInt( 0, 3 );
						switch( dir )
						{
							case LEFT:		me->StrafeLeft(); break;
							case RIGHT:		me->StrafeRight(); break;
							case FORWARD:	me->MoveForward(); break;
							case BACKWARD:	me->MoveBackward(); break;
						}

						// check if we are close enough to the hostage to talk to him
						const float useRange = PLAYER_USE_RADIUS - 10.0f; // shave off a fudge factor to make sure we're within range
						if (to.IsLengthLessThan( useRange ))
						{
							me->UseEntity( me->GetGoalEntity() );					
							return;
						}
					}
				}
			}
			else if (me->GetTask() == CCSBot::RESCUE_HOSTAGES)
			{
				// periodically check if we lost all our hostages
				if (me->GetHostageEscortCount() == 0)
				{
					// lost our hostages - go get 'em
					me->Idle();
					return;
				}
			}

			break;
		}
	}


	if (me->UpdatePathMovement() != CCSBot::PROGRESSING)
	{
		// reached destination
		switch( me->GetTask() )
		{
			case CCSBot::PLANT_BOMB:
				// if we are at bombsite with the bomb, plant it
				if (me->IsAtBombsite() && me->HasC4())
				{
					me->PlantBomb();
					return;
				}
				break;
		
			case CCSBot::MOVE_TO_LAST_KNOWN_ENEMY_POSITION:
			{
				CBasePlayer *victim = static_cast<CBasePlayer *>( me->GetTaskEntity() );
				if (victim && victim->IsAlive())
				{
					// if we got here and haven't re-acquired the enemy, we lost him
					BotStatement *say = new BotStatement( me->GetChatter(), REPORT_ENEMY_LOST, 8.0f );

					say->AppendPhrase( TheBotPhrases->GetPhrase( "LostEnemy" ) );
					say->SetStartTime( gpGlobals->curtime + RandomFloat( 3.0f, 5.0f ) );

					me->GetChatter()->AddStatement( say );
				}
				break;
			}
		}

		// default behavior when destination is reached
		me->Idle();
		return;
	}
}

//--------------------------------------------------------------------------------------------------------------
void MoveToState::OnExit( CCSBot *me )
{
	// reset to run in case we were walking near our goal position
	me->Run();
	me->SetDisposition( CCSBot::ENGAGE_AND_INVESTIGATE );
	//me->StopAiming();
}