/*
 *  Aethyra
 *  Copyright (C) 2004  The Mana World Development Team
 *
 *  This file is part of Aethyra based on original code
 *  from The Mana World.
 *
 *  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
 *  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 <cassert>

#include "configuration.h"
#include "equipment.h"
#include "floor_item.h"
#include "game.h"
#include "graphics.h"
#include "inventory.h"
#include "item.h"
#include "localplayer.h"
#include "map.h"
#include "monster.h"
#include "particle.h"
#include "simpleanimation.h"
#include "sound.h"
#include "text.h"

#include "gui/gui.h"

#include "net/messageout.h"
#include "net/protocol.h"

#include "resources/animation.h"
#include "resources/imageset.h"
#include "resources/resourcemanager.h"

#include "utils/tostring.h"

LocalPlayer *player_node = NULL;

static const int NAME_X_OFFSET = 15;
static const int NAME_Y_OFFSET = 30;

LocalPlayer::LocalPlayer(Uint32 id, Uint16 job, Map *map):
    Player(id, job, map),
    mCharId(0),
    mJobXp(0),
    mLevel(0),
    mJobLevel(0),
    mXpForNextLevel(0), mJobXpForNextLevel(0),
    mHp(0), mMaxHp(0), mMp(0), mMaxMp(0),
    mGp(0),
    mAttackRange(0),
    mTotalWeight(0), mMaxWeight(0),
    ATK(0), MATK(0), DEF(0), MDEF(0), HIT(0), FLEE(0),
    ATK_BONUS(0), MATK_BONUS(0), DEF_BONUS(0), MDEF_BONUS(0), FLEE_BONUS(0),
    mStatPoint(0), mSkillPoint(0),
    mStatsPointsToAttribute(0),
    mEquipment(new Equipment()),
    mXp(0), mNetwork(0),
    mTarget(NULL), mPickUpTarget(NULL),
    mTrading(false), mGoingToTarget(false),
    mTargetTime(-1), mLastAction(-1),
    mLastTarget(-1), mWalkingDir(0),
    mDestX(0), mDestY(0),
    mInventory(new Inventory(INVENTORY_SIZE)),
    mStorage(new Inventory(STORAGE_SIZE))
{
    // Variable to keep the local player from doing certain actions before a map
    // is initialized. e.g. drawing a player's name using the TextManager, since
    // it appears to be dependant upon map coordinates for updating drawing.
    mMapInitialized = false;

    mUpdateName = true;

    initTargetCursor();
}

LocalPlayer::~LocalPlayer()
{
    delete mInventory;
    delete mStorage;
    delete mName;

    for (int i = Being::TC_SMALL; i < Being::NUM_TC; i++)
    {
        delete mTargetCursor[0][i];
        delete mTargetCursor[1][i];
        mTargetCursorImages[0][i]->decRef();
        mTargetCursorImages[1][i]->decRef();
    }
}

void LocalPlayer::logic()
{
    switch (mAction) {
        case STAND:
           break;

        case SIT:
           break;

        case DEAD:
           break;

        case HURT:
           break;

        case WALK:
            mFrame = (get_elapsed_time(mWalkTime) * 6) / mWalkSpeed;
            if (mFrame >= 6)
                nextStep();
            break;

        case ATTACK:
            int frames = 4;
            if (mEquippedWeapon &&
                mEquippedWeapon->getAttackType() == ACTION_ATTACK_BOW)
                frames = 5;

            mFrame = (get_elapsed_time(mWalkTime) * frames) / mAttackSpeed;

            if (mFrame >= frames)
                nextStep();

            break;
    }

    // Actions are allowed once per second
    if (get_elapsed_time(mLastAction) >= 1000)
        mLastAction = -1;

    // Targeting allowed 4 times a second
    if (get_elapsed_time(mLastTarget) >= 250)
        mLastTarget = -1;

    // Remove target if its been on a being for more than a minute
    if (get_elapsed_time(mTargetTime) >= 60000)
    {
        mTargetTime = -1;
        setTarget(NULL);
        mLastTarget = -1;
    }

    if (mTarget)
    {
        // Find whether target is in range
        const int rangeX = abs(mTarget->mX - mX);
        const int rangeY = abs(mTarget->mY - mY);
        const int attackRange = getAttackRange();
        const int inRange = rangeX > attackRange || rangeY > attackRange ? 1 : 0;

        mTarget->setTargetAnimation(
            mTargetCursor[inRange][mTarget->getTargetCursorSize()]);

        if (mTarget->mAction == DEAD)
            stopAttack();

        if (mKeepAttacking && mTarget)
            attack(mTarget, true);
    }

    Being::logic();
}

void LocalPlayer::setGM()
{
    mIsGM = !mIsGM;
    mNameColor = mIsGM ? 0x009000: 0x202020;
    setName(getName());
    config.setValue(getName() + "GMassert", mIsGM);
}

void LocalPlayer::setName(const std::string &name)
{
    if (mName)
    {
        delete mName;
        mName = 0;
    }

    if (config.getValue("showownname", false) && mMapInitialized)
        Player::setName(name);
    else
        Being::setName(name);
}

void LocalPlayer::nextStep()
{
    if (mPath.empty())
    {
        if (mPickUpTarget)
            pickUp(mPickUpTarget);

        if (mWalkingDir)
            walk(mWalkingDir);
    }

    if (mGoingToTarget && mTarget && withinAttackRange(mTarget))
    {
        mAction = Being::STAND;
        attack(mTarget, true);
        mGoingToTarget = false;
        mPath.clear();
        return;
    }
    else if (mGoingToTarget && !mTarget)
    {
        mGoingToTarget = false;
        mPath.clear();
    }

    Player::nextStep();
}

void LocalPlayer::equipItem(Item *item)
{
    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(CMSG_PLAYER_EQUIP);
    outMsg.writeInt16(item->getInvIndex());
    outMsg.writeInt16(0);
}

void LocalPlayer::unequipItem(Item *item)
{
    if (!item)
        return;

    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(CMSG_PLAYER_UNEQUIP);
    outMsg.writeInt16(item->getInvIndex());

    // Tidy equipment directly to avoid weapon still shown bug, for instance
    mEquipment->removeEquipment(item->getInvIndex());
}

void LocalPlayer::useItem(Item *item)
{
    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(CMSG_PLAYER_INVENTORY_USE);
    outMsg.writeInt16(item->getInvIndex());
    outMsg.writeInt32(item->getId());
    // Note: id is dest of item, usually player_node->account_ID ??
}

void LocalPlayer::dropItem(Item *item, int quantity)
{
    // TODO: Fix wrong coordinates of drops, serverside?
    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(CMSG_PLAYER_INVENTORY_DROP);
    outMsg.writeInt16(item->getInvIndex());
    outMsg.writeInt16(quantity);
}

void LocalPlayer::pickUp(FloorItem *item)
{
    int dx = item->getX() - mX;
    int dy = item->getY() - mY;

    if (dx * dx + dy * dy < 4)
    {
        MessageOut outMsg(mNetwork);
        outMsg.writeInt16(CMSG_ITEM_PICKUP);
        outMsg.writeInt32(item->getId());
        mPickUpTarget = NULL;
    }
    else
    {
        setDestination(item->getX(), item->getY());
        mPickUpTarget = item;
        stopAttack();
    }
}

void LocalPlayer::walk(unsigned char dir)
{
    if (!mMap || !dir)
        return;

    if (mAction == WALK && !mPath.empty())
    {
        // Just finish the current action, otherwise we get out of sync
        Being::setDestination(mX, mY);
        return;
    }

    Sint16 dx = 0, dy = 0;
    if (dir & UP)
        dy--;
    if (dir & DOWN)
        dy++;
    if (dir & LEFT)
        dx--;
    if (dir & RIGHT)
        dx++;

    // Prevent skipping corners over colliding tiles
    if (dx && mMap->tileCollides(mX + dx, mY))
        dx = 0;
    if (dy && mMap->tileCollides(mX, mY + dy))
        dy = 0;

    // Choose a straight direction when diagonal target is blocked
    if (dx && dy && mMap->tileCollides(mX + dx, mY + dy))
        dx = 0;

    // Walk to where the player can actually go
    if ((dx || dy) && !mMap->tileCollides(mX + dx, mY + dy))
    {
        setDestination(mX + dx, mY + dy);
    }
    else if (dir)
    {
        // If the being can't move, just change direction
        // TODO: Communicate this to the server (waiting on tmwserv)
        setDirection(dir);
    }
}

void LocalPlayer::setTarget(Being *target)
{
    if (mLastTarget != -1 || target == this)
        return;

    mLastTarget = tick_time;

    if (target == mTarget)
        target = NULL;

    if (target || mAction == ATTACK)
    {
        mTargetTime = tick_time;
    }
    else
    {
        mKeepAttacking = false;
        mTargetTime = -1;
    }

    if (mTarget)
        mTarget->untarget();

    if (mTarget && mTarget->getType() == Being::MONSTER)
        static_cast<Monster *>(mTarget)->showName(false);

    mTarget = target;

    if (target && target->getType() == Being::MONSTER)
        static_cast<Monster *>(target)->showName(true);
}

void LocalPlayer::setDestination(Uint16 x, Uint16 y)
{
    // Only send a new message to the server when destination changes
    if (x != mDestX || y != mDestY)
    {
        mDestX = x;
        mDestY = y;

        char temp[4] = "";
        MessageOut outMsg(mNetwork);
        set_coordinates(temp, x, y, mDirection);
        outMsg.writeInt16(0x0085);
        outMsg.writeString(temp, 3);
    }

    mPickUpTarget = NULL;
    Being::setDestination(x, y);
}

void LocalPlayer::setWalkingDir(int dir)
{
    if (mWalkingDir != dir)
    {
        mWalkingDir = dir;
    }

    // If we're not already walking, start walking.
    if (mAction != WALK && dir)
    {
        walk(dir);
    }
}

void LocalPlayer::raiseAttribute(Attribute attr)
{
    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(CMSG_STAT_UPDATE_REQUEST);

    switch (attr)
    {
        case STR:
            outMsg.writeInt16(0x000d);
            break;

        case AGI:
            outMsg.writeInt16(0x000e);
            break;

        case VIT:
            outMsg.writeInt16(0x000f);
            break;

        case INT:
            outMsg.writeInt16(0x0010);
            break;

        case DEX:
            outMsg.writeInt16(0x0011);
            break;

        case LUK:
            outMsg.writeInt16(0x0012);
            break;
    }
    outMsg.writeInt8(1);
}

void LocalPlayer::raiseSkill(Uint16 skillId)
{
    if (mSkillPoint <= 0)
        return;

    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(CMSG_SKILL_LEVELUP_REQUEST);
    outMsg.writeInt16(skillId);
}

void LocalPlayer::toggleSit()
{
    if (mLastAction != -1)
        return;
    mLastAction = tick_time;

    char type;
    switch (mAction)
    {
        case STAND: type = 2; break;
        case SIT: type = 3; break;
        default: return;
    }

    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(0x0089);
    outMsg.writeInt32(0);
    outMsg.writeInt8(type);
}

void LocalPlayer::emote(Uint8 emotion)
{
    if (mLastAction != -1)
        return;
    mLastAction = tick_time;

    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(0x00bf);
    outMsg.writeInt8(emotion);
}

void LocalPlayer::tradeReply(bool accept)
{
    if (!accept)
        mTrading = false;

    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(CMSG_TRADE_RESPONSE);
    outMsg.writeInt8(accept ? 3 : 4);
}

void LocalPlayer::trade(Being *being) const
{
    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(CMSG_TRADE_REQUEST);
    outMsg.writeInt32(being->getId());
}

bool LocalPlayer::tradeRequestOk() const
{
    return !mTrading;
}

void LocalPlayer::attack(Being *target, bool keep)
{
    mKeepAttacking = keep;

    if (!target)
        return;

    if ((mTarget != target) || !mTarget)
    {
        mLastTarget = -1;
        setTarget(target);
    }

    int dist_x = target->mX - mX;
    int dist_y = target->mY - mY;

    // Must be standing and be within attack range to continue
    if ((mAction != STAND) || (mAttackRange < abs(dist_x)) ||
        (mAttackRange < abs(dist_y)))
        return;

    if (abs(dist_y) >= abs(dist_x))
    {
        if (dist_y > 0)
            setDirection(DOWN);
        else
            setDirection(UP);
    }
    else
    {
        if (dist_x > 0)
            setDirection(RIGHT);
        else
            setDirection(LEFT);
    }

    // Implement charging attacks here
    mLastAttackTime = 0;

    mWalkTime = tick_time;
    mTargetTime = tick_time;

    setAction(ATTACK);

    if (mEquippedWeapon)
    {
        std::string soundFile = mEquippedWeapon->getSound(EQUIP_EVENT_STRIKE);
        if (!soundFile.empty())
            sound.playSfx(soundFile);
    }
    else
    {
        sound.playSfx("sfx/fist-swish.ogg");
    }

    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(0x0089);
    outMsg.writeInt32(target->getId());
    outMsg.writeInt8(0);

    if (!keep)
        stopAttack();
}

void LocalPlayer::stopAttack()
{
    if (mTarget)
    {
        setAction(STAND);
        mLastTarget = -1;
    }
    setTarget(NULL);
    mLastTarget = -1;
}

Being* LocalPlayer::getTarget() const
{
    return mTarget;
}

void LocalPlayer::revive()
{
    MessageOut outMsg(mNetwork);
    outMsg.writeInt16(0x00b2);
    outMsg.writeInt8(0);
}

void LocalPlayer::setXp(int xp)
{
    if (mMap && xp > mXp)
    {
        const std::string text = toString(xp - mXp) + " xp";

        // Show XP number
        particleEngine->addTextRiseFadeOutEffect(text, hitYellowFont,
                                                 mPx + 16, mPy - 16);
    }
    mXp = xp;
}

bool LocalPlayer::withinAttackRange(Being *target)
{
    int dist_x = abs(target->mX - mX);
    int dist_y = abs(target->mY - mY);

    if (dist_x > getAttackRange() || dist_y > getAttackRange())
    {
        return false;
    }

    return true;
}

void LocalPlayer::setGotoTarget(Being *target)
{
    mLastTarget = -1;
    setTarget(target);
    mGoingToTarget = true;
    setDestination(target->mX, target->mY);
}

void LocalPlayer::initTargetCursor()
{
    // Load target cursors
    loadTargetCursor("graphics/gui/target-cursor-blue-s.png", 44, 35,
                     false, TC_SMALL);
    loadTargetCursor("graphics/gui/target-cursor-red-s.png", 44, 35,
                     true, TC_SMALL);
    loadTargetCursor("graphics/gui/target-cursor-blue-m.png", 62, 44,
                     false, TC_MEDIUM);
    loadTargetCursor("graphics/gui/target-cursor-red-m.png", 62, 44,
                     true, TC_MEDIUM);
    loadTargetCursor("graphics/gui/target-cursor-blue-l.png", 82, 60,
                     false, TC_LARGE);
    loadTargetCursor("graphics/gui/target-cursor-red-l.png", 82, 60,
                     true, TC_LARGE);
}

void LocalPlayer::loadTargetCursor(std::string filename, int width, int height,
                                   bool outRange, TargetCursorSize size)
{
    assert(size > -1);
    assert(size < 3);

    ImageSet* currentImageSet;
    SimpleAnimation* currentCursor;

    ResourceManager *resman = ResourceManager::getInstance();

    currentImageSet = resman->getImageSet(filename, width, height);
    Animation *anim = new Animation();

    for (unsigned int i = 0; i < currentImageSet->size(); ++i)
    {
        anim->addFrame(currentImageSet->get(i), 75,
                      (16 - (currentImageSet->getWidth() / 2)),
                      (16 - (currentImageSet->getHeight() / 2)));
    }

    currentCursor = new SimpleAnimation(anim);

    const int index = outRange ? 1 : 0;

    mTargetCursorImages[index][size] = currentImageSet;
    mTargetCursor[index][size] = currentCursor;
}