#include "Scenery.h"

#include <ctime>
#include <map>

#include "PackStream.h"
#include "AtmosphereDefinition.h"
#include "CameraDefinition.h"
#include "CloudsDefinition.h"
#include "TerrainDefinition.h"
#include "TexturesDefinition.h"
#include "WaterDefinition.h"

static const double APP_HEADER = 19866544632.125;
static const int DATA_VERSION = 1;

Scenery::Scenery():
    BaseDefinition(NULL)
{
    addChild(atmosphere = new AtmosphereDefinition(this));
    addChild(camera = new CameraDefinition);
    addChild(clouds = new CloudsDefinition(this));
    addChild(terrain = new TerrainDefinition(this));
    addChild(textures = new TexturesDefinition(this));
    addChild(water = new WaterDefinition(this));
}

void Scenery::copy(BaseDefinition *destination_) const
{
    Scenery* destination = (Scenery*)destination_;

    atmosphere->copy(destination->atmosphere);
    camera->copy(destination->camera);
    clouds->copy(destination->clouds);
    terrain->copy(destination->terrain);
    textures->copy(destination->textures);
    water->copy(destination->water);

    destination->validate();
}

void Scenery::validate()
{
    BaseDefinition::validate();

    checkCameraAboveGround();
}

Scenery::FileOperationResult Scenery::saveGlobal(const std::string &filepath) const
{
    PackStream stream;
    double app_header, version_header;

    if (not stream.bindToFile(filepath, true))
    {
        return FILE_OPERATION_IOERROR;
    }

    app_header = (double)APP_HEADER;
    stream.write(&app_header);
    version_header = (double)DATA_VERSION;
    stream.write(&version_header);

    save(&stream);

    return FILE_OPERATION_OK;
}

Scenery::FileOperationResult Scenery::loadGlobal(const std::string &filepath)
{
    PackStream stream;
    double app_header, version_header;

    if (not stream.bindToFile(filepath, false))
    {
        return FILE_OPERATION_IOERROR;
    }

    stream.read(&app_header);
    if (app_header != APP_HEADER)
    {
        return FILE_OPERATION_APP_MISMATCH;
    }

    stream.read(&version_header);
    if ((int)version_header != DATA_VERSION)
    {
        return FILE_OPERATION_VERSION_MISMATCH;
    }

    load(&stream);

    return FILE_OPERATION_OK;
}

Scenery* Scenery::getScenery()
{
    return this;
}

void Scenery::autoPreset(int seed)
{
    if (!seed)
    {
        seed = time(NULL);
    }
    srand(seed);

    terrain->applyPreset(TerrainDefinition::TERRAIN_PRESET_STANDARD);
    textures->applyPreset(TexturesDefinition::TEXTURES_PRESET_FULL);
    atmosphere->applyPreset(AtmosphereDefinition::ATMOSPHERE_PRESET_CLEAR_DAY);
    water->applyPreset(WaterDefinition::WATER_PRESET_LAKE);
    clouds->applyPreset(CloudsDefinition::CLOUDS_PRESET_PARTLY_CLOUDY);

    camera->setLocation(VECTOR_ZERO);
    camera->setTarget(VECTOR_NORTH);

    validate();
}

void Scenery::setAtmosphere(AtmosphereDefinition* atmosphere)
{
    atmosphere->copy(this->atmosphere);
}

void Scenery::getAtmosphere(AtmosphereDefinition* atmosphere)
{
    this->atmosphere->copy(atmosphere);
}

void Scenery::setCamera(CameraDefinition* camera)
{
    camera->copy(this->camera);
    checkCameraAboveGround();
}

void Scenery::getCamera(CameraDefinition* camera)
{
    this->camera->copy(camera);
}

void Scenery::setClouds(CloudsDefinition* clouds)
{
    clouds->copy(this->clouds);
}

void Scenery::getClouds(CloudsDefinition* clouds)
{
    this->clouds->copy(clouds);
}

void Scenery::setTerrain(TerrainDefinition* terrain)
{
    terrain->copy(this->terrain);
}

void Scenery::getTerrain(TerrainDefinition* terrain)
{
    this->terrain->copy(terrain);
}

void Scenery::setTextures(TexturesDefinition* textures)
{
    textures->copy(this->textures);
}

void Scenery::getTextures(TexturesDefinition* textures)
{
    this->textures->copy(textures);
}

void Scenery::setWater(WaterDefinition* water)
{
    water->copy(this->water);
}

void Scenery::getWater(WaterDefinition* water)
{
    this->water->copy(water);
}

void Scenery::checkCameraAboveGround()
{
    Vector3 camera_location = camera->getLocation();
    double terrain_height = terrain->getInterpolatedHeight(camera_location.x, camera_location.z, 1, 1) + 2.0;
    double water_height = 1.5;
    if (camera_location.y < water_height || camera_location.y < terrain_height)
    {
        double diff = ((water_height > terrain_height) ? water_height : terrain_height) - camera_location.y;
        camera->setLocation(camera_location.add(Vector3(0.0, diff, 0.0)));
    }
}