/* This file is part of the ScriptDev2 Project. See AUTHORS file for Copyright information
 * This program is free software licensed under GPL version 2
 * Please see the included DOCS/LICENSE.TXT for more information */

#include "precompiled.h"
#include "Config/Config.h"
#include "config.h"
#include "Database/DatabaseEnv.h"
#include "DBCStores.h"
#include "ObjectMgr.h"
#include "ProgressBar.h"
#include "../system/ScriptLoader.h"
#include "../system/system.h"
#include "../../../game/ScriptMgr.h"

typedef std::vector<Script*> SDScriptVec;
int num_sc_scripts;
SDScriptVec m_scripts;

Config SD2Config;

void FillSpellSummary();

void LoadDatabase()
{
    std::string strSD2DBinfo = SD2Config.GetStringDefault("ScriptDev2DatabaseInfo", "");

    if (strSD2DBinfo.empty())
    {
        script_error_log("Missing Scriptdev2 database info from configuration file. Load database aborted.");
        return;
    }

    // Initialize connection to DB
    if (SD2Database.Initialize(strSD2DBinfo.c_str()))
    {
        outstring_log("SD2: ScriptDev2 database initialized.");
        outstring_log("");

        // Extract DB-Name
        std::string::size_type n = strSD2DBinfo.rfind(';');
        std::string dbname;
        if (n != std::string::npos && n + 1 != std::string::npos)
            dbname = strSD2DBinfo.substr(n + 1);
        else
            dbname = "SD2_Database";
        dbname.append(".script_waypoint");
        SetExternalWaypointTable(dbname.c_str());

        // Load content
        pSystemMgr.LoadVersion();
        pSystemMgr.LoadScriptTexts();
        pSystemMgr.LoadScriptTextsCustom();
        pSystemMgr.LoadScriptGossipTexts();
        pSystemMgr.LoadScriptWaypoints();
    }
    else
    {
        script_error_log("Unable to connect to Database. Load database aborted.");
        return;
    }

    SD2Database.HaltDelayThread();
}

struct TSpellSummary
{
    uint8 Targets;                                          // set of enum SelectTarget
    uint8 Effects;                                          // set of enum SelectEffect
} extern* SpellSummary;

MANGOS_DLL_EXPORT
void FreeScriptLibrary()
{
    // Free Spell Summary
    delete []SpellSummary;

    // Free resources before library unload
    for (SDScriptVec::const_iterator itr = m_scripts.begin(); itr != m_scripts.end(); ++itr)
        delete *itr;

    m_scripts.clear();

    num_sc_scripts = 0;

    setScriptLibraryErrorFile(NULL, NULL);
}

MANGOS_DLL_EXPORT
void InitScriptLibrary()
{
    // ScriptDev2 startup
    outstring_log("");
    outstring_log(" MMM  MMM    MM");
    outstring_log("M  MM M  M  M  M");
    outstring_log("MM    M   M   M");
    outstring_log(" MMM  M   M  M");
    outstring_log("   MM M   M MMMM");
    outstring_log("MM  M M  M ");
    outstring_log(" MMM  MMM  http://www.scriptdev2.com");
    outstring_log("");

    // Get configuration file
    bool configFailure = false;
    if (!SD2Config.SetSource(_SCRIPTDEV2_CONFIG))
        configFailure = true;
    else
        outstring_log("SD2: Using configuration file %s", _SCRIPTDEV2_CONFIG);

    // Set SD2 Error Log File
    std::string sd2LogFile = SD2Config.GetStringDefault("SD2ErrorLogFile", "SD2Errors.log");
    setScriptLibraryErrorFile(sd2LogFile.c_str(), "SD2");

    if (configFailure)
        script_error_log("Unable to open configuration file. Database will be unaccessible. Configuration values will use default.");

    // Check config file version
    if (SD2Config.GetIntDefault("ConfVersion", 0) != SD2_CONF_VERSION)
        script_error_log("Configuration file version doesn't match expected version. Some config variables may be wrong or missing.");

    outstring_log("");

    // Load database (must be called after SD2Config.SetSource).
    LoadDatabase();

    outstring_log("SD2: Loading C++ scripts");
    BarGoLink bar(1);
    bar.step();
    outstring_log("");

    // Resize script ids to needed ammount of assigned ScriptNames (from core)
    m_scripts.resize(GetScriptIdsCount(), NULL);

    FillSpellSummary();

    AddScripts();

    // Check existance scripts for all registered by core script names
    for (uint32 i = 1; i < GetScriptIdsCount(); ++i)
    {
        if (!m_scripts[i])
            script_error_log("No script found for ScriptName '%s'.", GetScriptName(i));
    }

    outstring_log(">> Loaded %i C++ Scripts.", num_sc_scripts);
}

//*********************************
//*** Functions used globally ***

/**
 * Function that does script text
 *
 * @param iTextEntry Entry of the text, stored in SD2-database
 * @param pSource Source of the text
 * @param pTarget Can be NULL (depending on CHAT_TYPE of iTextEntry). Possible target for the text
 */
void DoScriptText(int32 iTextEntry, WorldObject* pSource, Unit* pTarget)
{
    if (!pSource)
    {
        script_error_log("DoScriptText entry %i, invalid Source pointer.", iTextEntry);
        return;
    }

    if (iTextEntry >= 0)
    {
        script_error_log("DoScriptText with source entry %u (TypeId=%u, guid=%u) attempts to process text entry %i, but text entry must be negative.",
                         pSource->GetEntry(), pSource->GetTypeId(), pSource->GetGUIDLow(), iTextEntry);

        return;
    }

    DoDisplayText(pSource, iTextEntry, pTarget);
    // TODO - maybe add some call-stack like error output if above function returns false
}

/**
 * Function that either simulates or does script text for a map
 *
 * @param iTextEntry Entry of the text, stored in SD2-database, only type CHAT_TYPE_ZONE_YELL supported
 * @param uiCreatureEntry Id of the creature of whom saying will be simulated
 * @param pMap Given Map on which the map-wide text is displayed
 * @param pCreatureSource Can be NULL. If pointer to Creature is given, then the creature does the map-wide text
 * @param pTarget Can be NULL. Possible target for the text
 */
void DoOrSimulateScriptTextForMap(int32 iTextEntry, uint32 uiCreatureEntry, Map* pMap, Creature* pCreatureSource /*=NULL*/, Unit* pTarget /*=NULL*/)
{
    if (!pMap)
    {
        script_error_log("DoOrSimulateScriptTextForMap entry %i, invalid Map pointer.", iTextEntry);
        return;
    }

    if (iTextEntry >= 0)
    {
        script_error_log("DoOrSimulateScriptTextForMap with source entry %u for map %u attempts to process text entry %i, but text entry must be negative.", uiCreatureEntry, pMap->GetId(), iTextEntry);
        return;
    }

    CreatureInfo const* pInfo = GetCreatureTemplateStore(uiCreatureEntry);
    if (!pInfo)
    {
        script_error_log("DoOrSimulateScriptTextForMap has invalid source entry %u for map %u.", uiCreatureEntry, pMap->GetId());
        return;
    }

    MangosStringLocale const* pData = GetMangosStringData(iTextEntry);
    if (!pData)
    {
        script_error_log("DoOrSimulateScriptTextForMap with source entry %u for map %u could not find text entry %i.", uiCreatureEntry, pMap->GetId(), iTextEntry);
        return;
    }

    debug_log("SD2: DoOrSimulateScriptTextForMap: text entry=%i, Sound=%u, Type=%u, Language=%u, Emote=%u",
              iTextEntry, pData->SoundId, pData->Type, pData->LanguageId, pData->Emote);

    if (pData->Type != CHAT_TYPE_ZONE_YELL)
    {
        script_error_log("DoSimulateScriptTextForMap entry %i has not supported chat type %u.", iTextEntry, pData->Type);
        return;
    }

    if (pData->SoundId)
        pMap->PlayDirectSoundToMap(pData->SoundId);

    if (pCreatureSource)                                // If provided pointer for sayer, use direct version
        pMap->MonsterYellToMap(pCreatureSource->GetObjectGuid(), iTextEntry, pData->LanguageId, pTarget);
    else                                                // Simulate yell
        pMap->MonsterYellToMap(pInfo, iTextEntry, pData->LanguageId, pTarget);
}

//*********************************
//*** Functions used internally ***

void Script::RegisterSelf(bool bReportError)
{
    if (uint32 id = GetScriptId(Name.c_str()))
    {
        m_scripts[id] = this;
        ++num_sc_scripts;
    }
    else
    {
        if (bReportError)
            script_error_log("Script registering but ScriptName %s is not assigned in database. Script will not be used.", Name.c_str());

        delete this;
    }
}

//********************************
//*** Functions to be Exported ***

MANGOS_DLL_EXPORT
bool GossipHello(Player* pPlayer, Creature* pCreature)
{
    Script* pTempScript = m_scripts[pCreature->GetScriptId()];

    if (!pTempScript || !pTempScript->pGossipHello)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pGossipHello(pPlayer, pCreature);
}

MANGOS_DLL_EXPORT
bool GOGossipHello(Player* pPlayer, GameObject* pGo)
{
    Script* pTempScript = m_scripts[pGo->GetGOInfo()->ScriptId];

    if (!pTempScript || !pTempScript->pGossipHelloGO)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pGossipHelloGO(pPlayer, pGo);
}

MANGOS_DLL_EXPORT
bool GossipSelect(Player* pPlayer, Creature* pCreature, uint32 uiSender, uint32 uiAction)
{
    debug_log("SD2: Gossip selection, sender: %u, action: %u", uiSender, uiAction);

    Script* pTempScript = m_scripts[pCreature->GetScriptId()];

    if (!pTempScript || !pTempScript->pGossipSelect)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pGossipSelect(pPlayer, pCreature, uiSender, uiAction);
}

MANGOS_DLL_EXPORT
bool GOGossipSelect(Player* pPlayer, GameObject* pGo, uint32 uiSender, uint32 uiAction)
{
    debug_log("SD2: GO Gossip selection, sender: %u, action: %u", uiSender, uiAction);

    Script* pTempScript = m_scripts[pGo->GetGOInfo()->ScriptId];

    if (!pTempScript || !pTempScript->pGossipSelectGO)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pGossipSelectGO(pPlayer, pGo, uiSender, uiAction);
}

MANGOS_DLL_EXPORT
bool GossipSelectWithCode(Player* pPlayer, Creature* pCreature, uint32 uiSender, uint32 uiAction, const char* sCode)
{
    debug_log("SD2: Gossip selection with code, sender: %u, action: %u", uiSender, uiAction);

    Script* pTempScript = m_scripts[pCreature->GetScriptId()];

    if (!pTempScript || !pTempScript->pGossipSelectWithCode)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pGossipSelectWithCode(pPlayer, pCreature, uiSender, uiAction, sCode);
}

MANGOS_DLL_EXPORT
bool GOGossipSelectWithCode(Player* pPlayer, GameObject* pGo, uint32 uiSender, uint32 uiAction, const char* sCode)
{
    debug_log("SD2: GO Gossip selection with code, sender: %u, action: %u", uiSender, uiAction);

    Script* pTempScript = m_scripts[pGo->GetGOInfo()->ScriptId];

    if (!pTempScript || !pTempScript->pGossipSelectGOWithCode)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pGossipSelectGOWithCode(pPlayer, pGo, uiSender, uiAction, sCode);
}

MANGOS_DLL_EXPORT
bool QuestAccept(Player* pPlayer, Creature* pCreature, const Quest* pQuest)
{
    Script* pTempScript = m_scripts[pCreature->GetScriptId()];

    if (!pTempScript || !pTempScript->pQuestAcceptNPC)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pQuestAcceptNPC(pPlayer, pCreature, pQuest);
}

MANGOS_DLL_EXPORT
bool QuestRewarded(Player* pPlayer, Creature* pCreature, Quest const* pQuest)
{
    Script* pTempScript = m_scripts[pCreature->GetScriptId()];

    if (!pTempScript || !pTempScript->pQuestRewardedNPC)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pQuestRewardedNPC(pPlayer, pCreature, pQuest);
}

MANGOS_DLL_EXPORT
uint32 GetNPCDialogStatus(Player* pPlayer, Creature* pCreature)
{
    Script* pTempScript = m_scripts[pCreature->GetScriptId()];

    if (!pTempScript || !pTempScript->pDialogStatusNPC)
        return DIALOG_STATUS_UNDEFINED;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pDialogStatusNPC(pPlayer, pCreature);
}

MANGOS_DLL_EXPORT
uint32 GetGODialogStatus(Player* pPlayer, GameObject* pGo)
{
    Script* pTempScript = m_scripts[pGo->GetGOInfo()->ScriptId];

    if (!pTempScript || !pTempScript->pDialogStatusGO)
        return DIALOG_STATUS_UNDEFINED;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pDialogStatusGO(pPlayer, pGo);
}

MANGOS_DLL_EXPORT
bool ItemQuestAccept(Player* pPlayer, Item* pItem, Quest const* pQuest)
{
    Script* pTempScript = m_scripts[pItem->GetProto()->ScriptId];

    if (!pTempScript || !pTempScript->pQuestAcceptItem)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pQuestAcceptItem(pPlayer, pItem, pQuest);
}

MANGOS_DLL_EXPORT
bool GOUse(Player* pPlayer, GameObject* pGo)
{
    Script* pTempScript = m_scripts[pGo->GetGOInfo()->ScriptId];

    if (!pTempScript || !pTempScript->pGOUse)
        return false;

    return pTempScript->pGOUse(pPlayer, pGo);
}

MANGOS_DLL_EXPORT
bool GOQuestAccept(Player* pPlayer, GameObject* pGo, const Quest* pQuest)
{
    Script* pTempScript = m_scripts[pGo->GetGOInfo()->ScriptId];

    if (!pTempScript || !pTempScript->pQuestAcceptGO)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pQuestAcceptGO(pPlayer, pGo, pQuest);
}

MANGOS_DLL_EXPORT
bool GOQuestRewarded(Player* pPlayer, GameObject* pGo, Quest const* pQuest)
{
    Script* pTempScript = m_scripts[pGo->GetGOInfo()->ScriptId];

    if (!pTempScript || !pTempScript->pQuestRewardedGO)
        return false;

    pPlayer->PlayerTalkClass->ClearMenus();

    return pTempScript->pQuestRewardedGO(pPlayer, pGo, pQuest);
}

MANGOS_DLL_EXPORT
bool AreaTrigger(Player* pPlayer, AreaTriggerEntry const* atEntry)
{
    Script* pTempScript = m_scripts[GetAreaTriggerScriptId(atEntry->id)];

    if (!pTempScript || !pTempScript->pAreaTrigger)
        return false;

    return pTempScript->pAreaTrigger(pPlayer, atEntry);
}

MANGOS_DLL_EXPORT
bool ProcessEvent(uint32 uiEventId, Object* pSource, Object* pTarget, bool bIsStart)
{
    Script* pTempScript = m_scripts[GetEventIdScriptId(uiEventId)];

    if (!pTempScript || !pTempScript->pProcessEventId)
        return false;

    // bIsStart may be false, when event is from taxi node events (arrival=false, departure=true)
    return pTempScript->pProcessEventId(uiEventId, pSource, pTarget, bIsStart);
}

MANGOS_DLL_EXPORT
CreatureAI* GetCreatureAI(Creature* pCreature)
{
    Script* pTempScript = m_scripts[pCreature->GetScriptId()];

    if (!pTempScript || !pTempScript->GetAI)
        return NULL;

    return pTempScript->GetAI(pCreature);
}

MANGOS_DLL_EXPORT
bool ItemUse(Player* pPlayer, Item* pItem, SpellCastTargets const& targets)
{
    Script* pTempScript = m_scripts[pItem->GetProto()->ScriptId];

    if (!pTempScript || !pTempScript->pItemUse)
        return false;

    return pTempScript->pItemUse(pPlayer, pItem, targets);
}

MANGOS_DLL_EXPORT
bool EffectDummyCreature(Unit* pCaster, uint32 spellId, SpellEffectIndex effIndex, Creature* pTarget, ObjectGuid originalCasterGuid)
{
    Script* pTempScript = m_scripts[pTarget->GetScriptId()];

    if (!pTempScript || !pTempScript->pEffectDummyNPC)
        return false;

    return pTempScript->pEffectDummyNPC(pCaster, spellId, effIndex, pTarget, originalCasterGuid);
}

MANGOS_DLL_EXPORT
bool EffectDummyGameObject(Unit* pCaster, uint32 spellId, SpellEffectIndex effIndex, GameObject* pTarget, ObjectGuid originalCasterGuid)
{
    Script* pTempScript = m_scripts[pTarget->GetGOInfo()->ScriptId];

    if (!pTempScript || !pTempScript->pEffectDummyGO)
        return false;

    return pTempScript->pEffectDummyGO(pCaster, spellId, effIndex, pTarget, originalCasterGuid);
}

MANGOS_DLL_EXPORT
bool EffectDummyItem(Unit* pCaster, uint32 spellId, SpellEffectIndex effIndex, Item* pTarget, ObjectGuid originalCasterGuid)
{
    Script* pTempScript = m_scripts[pTarget->GetProto()->ScriptId];

    if (!pTempScript || !pTempScript->pEffectDummyItem)
        return false;

    return pTempScript->pEffectDummyItem(pCaster, spellId, effIndex, pTarget, originalCasterGuid);
}

MANGOS_DLL_EXPORT
bool EffectScriptEffectCreature(Unit* pCaster, uint32 spellId, SpellEffectIndex effIndex, Creature* pTarget, ObjectGuid originalCasterGuid)
{
    Script* pTempScript = m_scripts[pTarget->GetScriptId()];

    if (!pTempScript || !pTempScript->pEffectScriptEffectNPC)
        return false;

    return pTempScript->pEffectScriptEffectNPC(pCaster, spellId, effIndex, pTarget, originalCasterGuid);
}

MANGOS_DLL_EXPORT
bool AuraDummy(Aura const* pAura, bool bApply)
{
    Script* pTempScript = m_scripts[((Creature*)pAura->GetTarget())->GetScriptId()];

    if (!pTempScript || !pTempScript->pEffectAuraDummy)
        return false;

    return pTempScript->pEffectAuraDummy(pAura, bApply);
}

MANGOS_DLL_EXPORT
InstanceData* CreateInstanceData(Map* pMap)
{
    Script* pTempScript = m_scripts[pMap->GetScriptId()];

    if (!pTempScript || !pTempScript->GetInstanceData)
        return NULL;

    return pTempScript->GetInstanceData(pMap);
}