/*
 * Copyright (c) 2010-2011 OTClient <https://github.com/edubart/otclient>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "creature.h"
#include "thingstype.h"
#include "localplayer.h"
#include "map.h"
#include "tile.h"
#include "item.h"
#include "game.h"

#include <framework/graphics/graphics.h>
#include <framework/core/eventdispatcher.h>
#include <framework/core/clock.h>

#include <framework/graphics/paintershaderprogram.h>
#include <framework/graphics/paintershadersources.h>
#include "spritemanager.h"

Creature::Creature() : Thing()
{
    m_healthPercent = 0;
    m_showSquareColor = false;
    m_direction = Otc::South;
    m_walkTimePerPixel = 1000.0/32.0;

    m_walking = false;
    m_inverseWalking = true;

    m_informationFont = g_fonts.getFont("verdana-11px-rounded");
}

PainterShaderProgramPtr outfitProgram;
int HEAD_COLOR_UNIFORM = 10;
int BODY_COLOR_UNIFORM = 11;
int LEGS_COLOR_UNIFORM = 12;
int FEET_COLOR_UNIFORM = 13;
int MASK_TEXTURE_UNIFORM = 14;

void Creature::draw(const Point& p)
{
    // TODO: activate on attack, follow, discover how 'attacked' works
    if(m_showSquareColor) {
        g_painter.setColor(Outfit::getColor(m_squareColor));
        g_painter.drawBoundingRect(Rect(p + m_walkOffset - 8, Size(32, 32)), 2);
    }

    if(!outfitProgram) {
        outfitProgram = PainterShaderProgramPtr(new PainterShaderProgram);
        outfitProgram->addShaderFromSourceCode(Shader::Vertex, glslMainWithTexCoordsVertexShader + glslPositionOnlyVertexShader);
        outfitProgram->addShaderFromSourceFile(Shader::Fragment, "/game_shaders/outfit.frag");
        assert(outfitProgram->link());
        outfitProgram->bindUniformLocation(HEAD_COLOR_UNIFORM, "headColor");
        outfitProgram->bindUniformLocation(BODY_COLOR_UNIFORM, "bodyColor");
        outfitProgram->bindUniformLocation(LEGS_COLOR_UNIFORM, "legsColor");
        outfitProgram->bindUniformLocation(FEET_COLOR_UNIFORM, "feetColor");
        outfitProgram->bindUniformLocation(MASK_TEXTURE_UNIFORM, "maskTexture");
    }

    // Render creature
    for(m_yPattern = 0; m_yPattern < m_type->dimensions[ThingType::PatternY]; m_yPattern++) {

        // continue if we dont have this addon.
        if(m_yPattern > 0 && !(m_outfit.getAddons() & (1 << (m_yPattern-1))))
            continue;

        g_painter.setCustomProgram(outfitProgram);

        outfitProgram->bind();
        outfitProgram->setUniformValue(HEAD_COLOR_UNIFORM, m_outfit.getHeadColor());
        outfitProgram->setUniformValue(BODY_COLOR_UNIFORM, m_outfit.getBodyColor());
        outfitProgram->setUniformValue(LEGS_COLOR_UNIFORM, m_outfit.getLegsColor());
        outfitProgram->setUniformValue(FEET_COLOR_UNIFORM, m_outfit.getFeetColor());

        for(int h = 0; h < m_type->dimensions[ThingType::Height]; h++) {
            for(int w = 0; w < m_type->dimensions[ThingType::Width]; w++) {
                int spriteId = m_type->getSpriteId(w, h, 0, m_xPattern, m_yPattern, m_zPattern, m_animation);
                if(!spriteId)
                    continue;
                TexturePtr spriteTex = g_sprites.getSpriteTexture(spriteId);
                if(!spriteTex)
                    continue;

                if(m_type->dimensions[ThingType::Layers] > 1) {
                    int maskId = m_type->getSpriteId(w, h, 1, m_xPattern, m_yPattern, m_zPattern, m_animation);
                    if(!maskId)
                        continue;
                    TexturePtr maskTex = g_sprites.getSpriteTexture(maskId);
                    outfitProgram->setUniformTexture(MASK_TEXTURE_UNIFORM, maskTex, 1);
                }

                Rect drawRect(((p + m_walkOffset).x - w*32) - m_type->parameters[ThingType::DisplacementX],
                            ((p + m_walkOffset).y - h*32) - m_type->parameters[ThingType::DisplacementY],
                            32, 32);
                g_painter.drawTexturedRect(drawRect, spriteTex);
            }
        }

        g_painter.releaseCustomProgram();
    }
}

void Creature::drawInformation(int x, int y, bool useGray, const Rect& rect)
{
    Color fillColor = Color(96, 96, 96);

    if(!useGray)
        fillColor = m_informationColor;

    // calculate main rects
    Rect backgroundRect = Rect(x-(13.5), y, 27, 4);
    backgroundRect.bound(rect);

    Rect textRect = Rect(x - m_nameSize.width() / 2.0, y-15, m_nameSize);
    textRect.bound(rect);

    // distance them
    if(textRect.top() == rect.top())
        backgroundRect.moveTop(textRect.top() + 15);
    if(backgroundRect.bottom() == rect.bottom())
        textRect.moveTop(backgroundRect.top() - 15);

    // health rect is based on background rect, so no worries
    Rect healthRect = backgroundRect.expanded(-1);
    healthRect.setWidth((m_healthPercent / 100.0) * 25);

    // draw
    g_painter.setColor(Fw::black);
    g_painter.drawFilledRect(backgroundRect);

    g_painter.setColor(fillColor);
    g_painter.drawFilledRect(healthRect);

    if(m_informationFont)
        m_informationFont->renderText(m_name, textRect, Fw::AlignTopCenter, fillColor);
}

void Creature::walk(const Position& position, bool inverse)
{
    // We're walking
    if(m_position.isInRange(position, 1, 1, 0)) {
        Otc::Direction direction = m_position.getDirectionFromPosition(position);
        setDirection(direction);

        if(inverse) {
            Position positionDelta = m_position - position;
            m_walkOffset = Point(positionDelta.x * Map::NUM_TILE_PIXELS, positionDelta.y * Map::NUM_TILE_PIXELS);
        }
        else
            m_walkOffset = Point(0, 0);

        // Diagonal walking lasts 3 times more.
        int walkTimeFactor = 1;
        if(direction == Otc::NorthWest || direction == Otc::NorthEast || direction == Otc::SouthWest || direction == Otc::SouthEast)
            walkTimeFactor = 3;

        // Get walking speed
        int groundSpeed = 100;
        if(ItemPtr ground = g_map.getTile(position)->getGround())
            groundSpeed = ground->getType()->parameters[ThingType::GroundSpeed];

        float walkTime = 1000.0 * (float)groundSpeed / m_speed;
        walkTime = (walkTime == 0) ? 1000 : walkTime;
        walkTime = std::ceil(walkTime / g_game.getServerBeat()) * g_game.getServerBeat();

        bool sameWalk = m_walking && !m_inverseWalking && inverse;
        m_inverseWalking = inverse;
        m_walking = true;

        m_walkTimePerPixel = walkTime / 32.0;
        m_walkStart = sameWalk ? m_walkStart : g_clock.ticks();
        m_walkEnd = m_walkStart + walkTime * walkTimeFactor;

        m_turnDirection = m_direction;
        updateWalk();
    }
    // Teleport
    else {
        m_walking = false;
        m_walkOffset = Point(0, 0);
        m_animation = 0;
    }
}

void Creature::turn(Otc::Direction direction)
{
    if(!m_walking)
        setDirection(direction);
    else
        m_turnDirection = direction;
}

void Creature::updateWalk()
{
    if(!m_walking)
        return;

    int elapsedTicks = g_clock.ticksElapsed(m_walkStart);
    int totalPixelsWalked = std::min((int)round(elapsedTicks / m_walkTimePerPixel), 32);

    if(m_inverseWalking) {
        if(m_direction == Otc::North || m_direction == Otc::NorthEast || m_direction == Otc::NorthWest)
            m_walkOffset.y = 32 - totalPixelsWalked;
        else if(m_direction == Otc::South || m_direction == Otc::SouthEast || m_direction == Otc::SouthWest)
            m_walkOffset.y = totalPixelsWalked - 32;

        if(m_direction == Otc::East || m_direction == Otc::NorthEast || m_direction == Otc::SouthEast)
            m_walkOffset.x = totalPixelsWalked - 32;
        else if(m_direction == Otc::West || m_direction == Otc::NorthWest || m_direction == Otc::SouthWest)
            m_walkOffset.x = 32 - totalPixelsWalked;
    }
    else {
        if(m_direction == Otc::North || m_direction == Otc::NorthEast || m_direction == Otc::NorthWest)
            m_walkOffset.y = -totalPixelsWalked;
        else if(m_direction == Otc::South || m_direction == Otc::SouthEast || m_direction == Otc::SouthWest)
            m_walkOffset.y = totalPixelsWalked;

        if(m_direction == Otc::East || m_direction == Otc::NorthEast || m_direction == Otc::SouthEast)
            m_walkOffset.x = totalPixelsWalked;
        else if(m_direction == Otc::West || m_direction == Otc::NorthWest || m_direction == Otc::SouthWest)
            m_walkOffset.x = -totalPixelsWalked;
    }

    if(totalPixelsWalked == 32 || m_type->dimensions[ThingType::AnimationPhases] <= 1)
        m_animation = 0;
    else if(m_type->dimensions[ThingType::AnimationPhases] > 1)
        m_animation = 1 + totalPixelsWalked * 4 / Map::NUM_TILE_PIXELS % (m_type->dimensions[ThingType::AnimationPhases] - 1);

    if(g_clock.ticks() > m_walkEnd)
        cancelWalk(m_turnDirection);
    else
        g_dispatcher.scheduleEvent(std::bind(&Creature::updateWalk, asCreature()), m_walkTimePerPixel);
}

void Creature::cancelWalk(Otc::Direction direction)
{
    m_walking = false;
    m_walkStart = 0;
    m_animation = 0;
    m_walkOffset = Point(0, 0);
    setDirection(direction);
}

void Creature::setName(const std::string& name)
{
    if(m_informationFont)
        m_nameSize = m_informationFont->calculateTextRectSize(name);
    m_name = name;
}

void Creature::setHealthPercent(uint8 healthPercent)
{
    m_informationColor = Fw::black;

    if(healthPercent > 92) {
        m_informationColor.setGreen(188);
    }
    else if(healthPercent > 60) {
        m_informationColor.setRed(80);
        m_informationColor.setGreen(161);
        m_informationColor.setBlue(80);
    }
    else if(healthPercent > 30) {
        m_informationColor.setRed(161);
        m_informationColor.setGreen(161);
    }
    else if(healthPercent > 8) {
        m_informationColor.setRed(160);
        m_informationColor.setGreen(39);
        m_informationColor.setBlue(39);
    }
    else if(healthPercent > 3) {
        m_informationColor.setRed(160);
    }
    else {
        m_informationColor.setRed(79);
    }

    m_healthPercent = healthPercent;
}

void Creature::setDirection(Otc::Direction direction)
{
    if(direction == Otc::NorthEast || direction == Otc::SouthEast)
        m_xPattern = Otc::East;
    else if(direction == Otc::NorthWest || direction == Otc::SouthWest)
        m_xPattern = Otc::West;
    else
        m_xPattern = direction;

    m_direction = direction;
}

void Creature::setOutfit(const Outfit& outfit)
{
    m_outfit = outfit;
    m_type = getType();

    // Do not apply any mask color.
    if(m_type->dimensions[ThingType::Layers] == 1) {
        m_outfit.setHead(0);
        m_outfit.setBody(0);
        m_outfit.setLegs(0);
        m_outfit.setFeet(0);
    }
}

ThingType *Creature::getType()
{
    return g_thingsType.getThingType(m_outfit.getType(), ThingsType::Creature);
}