cp_mission_buildbase.cpp

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/*
Copyright (C) 2002-2025 UFO: Alien Invasion.
 
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; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
 
#include "../../../DateTime.h"
#include "../../../cl_shared.h"
#include "../cp_campaign.h"
#include "../cp_alienbase.h"
#include "../cp_geoscape.h"
#include "../cp_ufo.h"
#include "../cp_missions.h"
#include "../cp_time.h"
#include "../cp_xvi.h"
#include "../cp_alien_interest.h"
#include "cp_mission_buildbase.h"
#include "cp_mission_recon.h"
 
#define HAPPINESS_SUBVERSION_LOSS           -0.15

bool CP_BasemissionIsSubvertingGovernmentMission (const mission_t* mission)
{
    return mission->initialOverallInterest < ccs.curCampaign->alienBaseInterest;
}

void CP_BuildBaseMissionIsSuccess (mission_t* mission)
{
    if (CP_BasemissionIsSubvertingGovernmentMission(mission)) {
        /* This is a subverting government mission */
        INT_ChangeIndividualInterest(0.1f, INTERESTCATEGORY_TERROR_ATTACK);
    } else {
        /* An alien base has been built */
        const alienBase_t* base = mission->data.alienBase;
        assert(base);
        CP_SpreadXVIAtPos(base->pos);
 
        if (CP_IsXVIStarted())
            INT_ChangeIndividualInterest(0.4f, INTERESTCATEGORY_XVI);
        INT_ChangeIndividualInterest(0.4f, INTERESTCATEGORY_SUPPLY);
        INT_ChangeIndividualInterest(0.1f, INTERESTCATEGORY_HARVEST);
    }
 
    CP_MissionRemove(mission);
}

void CP_BuildBaseMissionIsFailure (mission_t* mission)
{
    /* Restore some alien interest for build base that has been removed when mission has been created */
    INT_ChangeIndividualInterest(0.5f, INTERESTCATEGORY_BUILDING);
    INT_ChangeIndividualInterest(0.05f, INTERESTCATEGORY_BASE_ATTACK);
 
    CP_MissionRemove(mission);
}

void CP_BuildBaseMissionOnSpawn (void)
{
    INT_ChangeIndividualInterest(-0.7f, INTERESTCATEGORY_BUILDING);
}

void CP_BuildBaseMissionBaseDestroyed (mission_t* mission)
{
    /* An alien base has been built */
    alienBase_t* base = mission->data.alienBase;
    assert(base);
 
    INT_ChangeIndividualInterest(+0.1f, INTERESTCATEGORY_BUILDING);
    INT_ChangeIndividualInterest(+0.3f, INTERESTCATEGORY_INTERCEPT);
 
    AB_DestroyBase(base);
    mission->data.alienBase = nullptr;
    CP_MissionRemove(mission);
}

static void CP_BuildBaseMissionLeave (mission_t* mission)
{
    assert(mission->ufo);
    /* there must be an alien base set */
    assert(mission->data.alienBase);
 
    mission->stage = STAGE_RETURN_TO_ORBIT;
 
    CP_MissionDisableTimeLimit(mission);
    UFO_SetRandomDest(mission->ufo);
    /* Display UFO on geoscape if it is detected */
    mission->ufo->landed = false;
}

static void CP_BuildBaseSetUpBase (mission_t* mission)
{
    alienBase_t* base;
    const DateTime minBuildingTime(5, 0);   
    const DateTime maxBuildingTime(10, 0);  
 
    assert(mission->ufo);
 
    mission->stage = STAGE_BUILD_BASE;
 
    mission->finalDate = ccs.date + Date_Random(minBuildingTime, maxBuildingTime);
 
    base = AB_BuildBase(mission->pos);
    if (!base) {
        cgi->Com_DPrintf(DEBUG_CLIENT, "CP_BuildBaseSetUpBase: could not create alien base\n");
        CP_MissionRemove(mission);
        return;
    }
    mission->data.alienBase = base;
 
    /* ufo becomes invisible on geoscape */
    CP_UFORemoveFromGeoscape(mission, false);
}

static void CP_BuildBaseGoToBase (mission_t* mission)
{
    assert(mission->ufo);
 
    mission->stage = STAGE_MISSION_GOTO;
 
    AB_SetAlienBasePosition(mission->pos);
 
    UFO_SendToDestination(mission->ufo, mission->pos);
}

static void CP_BuildBaseGovernmentLeave (const campaign_t* campaign, mission_t* mission)
{
    nation_t* nation;
 
    assert(mission);
    assert(mission->ufo);
 
    mission->stage = STAGE_RETURN_TO_ORBIT;
 
    /* Mission is a success: government is subverted => lower happiness */
    nation = GEO_GetNation(mission->pos);
    if (nation) {
        const nationInfo_t* stats = NAT_GetCurrentMonthInfo(nation);
        NAT_SetHappiness(campaign->minhappiness, nation, stats->happiness + HAPPINESS_SUBVERSION_LOSS);
    }
 
    CP_MissionDisableTimeLimit(mission);
    UFO_SetRandomDest(mission->ufo);
    /* Display UFO on geoscape if it is detected */
    mission->ufo->landed = false;
}

static void CP_BuildBaseSubvertGovernment (mission_t* mission)
{
    const DateTime minMissionDelay(3, 0);
    const DateTime maxMissionDelay(5, 0);
 
    assert(mission->ufo);
 
    mission->stage = STAGE_SUBVERT_GOV;
 
    /* mission appear on geoscape, player can go there */
    CP_MissionAddToGeoscape(mission, false);
 
    mission->finalDate = ccs.date + Date_Random(minMissionDelay, maxMissionDelay);
    /* ufo becomes invisible on geoscape, but don't remove it from ufo global array (may reappear)*/
    CP_UFORemoveFromGeoscape(mission, false);
}

static void CP_BuildBaseChooseMission (mission_t* mission)
{
    if (CP_BasemissionIsSubvertingGovernmentMission(mission))
        CP_ReconMissionGroundGo(mission);
    else
        CP_BuildBaseGoToBase(mission);
}

void CP_BuildBaseMissionNextStage (const campaign_t* campaign, mission_t* mission)
{
    switch (mission->stage) {
    case STAGE_NOT_ACTIVE:
        /* Create mission */
        CP_MissionBegin(mission);
        break;
    case STAGE_COME_FROM_ORBIT:
        /* Choose type of mission */
        CP_BuildBaseChooseMission(mission);
        break;
    case STAGE_MISSION_GOTO:
        if (CP_BasemissionIsSubvertingGovernmentMission(mission))
            /* subverting mission */
            CP_BuildBaseSubvertGovernment(mission);
        else
            /* just arrived on base location: build base */
            CP_BuildBaseSetUpBase(mission);
        break;
    case STAGE_BUILD_BASE:
        /* Leave earth */
        CP_BuildBaseMissionLeave(mission);
        break;
    case STAGE_SUBVERT_GOV:
        /* Leave earth */
        CP_BuildBaseGovernmentLeave(campaign, mission);
        break;
    case STAGE_RETURN_TO_ORBIT:
        /* mission is over, remove mission */
        CP_BuildBaseMissionIsSuccess(mission);
        break;
    default:
        cgi->Com_Printf("CP_BuildBaseMissionNextStage: Unknown stage: %i, removing mission.\n", mission->stage);
        CP_MissionRemove(mission);
        break;
    }
}