#include "auto.h"

#include <math.h>
#include <stdlib.h>
#include <time.h>

#include "shared/types.h"
#include "shared/functions.h"
#include "shared/constants.h"
#include "shared/globals.h"

#include "system.h"
#include "water.h"
#include "clouds.h"
#include "sky.h"
#include "modifiers.h"
#include "terrain.h"
#include "textures.h"
#include "lighting.h"
#include "scenery.h"
#include "render.h"

static int _is_rendering = 0;

void autoSetDaytime(int hour, int minute)
{
    autoSetDaytimeFraction((double)hour / 24.0 + (double)minute / 1440.0);
}

void autoSetDaytimeFraction(double daytime)
{
    SkyDefinition sky;
    /*ColorGradation grad_sun;
    Color sun;*/

    daytime = fmod(daytime, 1.0);
    if (daytime < 0.0)
    {
        daytime += 1.0;
    }

    /*lightingSetSunAngle(0.0, (daytime + 0.25) * M_PI * 2.0);

    grad_sun = colorGradationCreate();
    colorGradationAddRgba(&grad_sun, 0.2, 0.1, 0.1, 0.1, 1.0);
    colorGradationAddRgba(&grad_sun, 0.25, 0.9, 0.5, 0.5, 1.0);
    colorGradationAddRgba(&grad_sun, 0.3, 0.8, 0.8, 0.8, 1.0);
    colorGradationAddRgba(&grad_sun, 0.5, 1.0, 1.0, 1.0, 1.0);
    colorGradationAddRgba(&grad_sun, 0.7, 0.8, 0.8, 0.8, 1.0);
    colorGradationAddRgba(&grad_sun, 0.75, 0.7, 0.6, 0.5, 1.0);
    colorGradationAddRgba(&grad_sun, 0.8, 0.1, 0.1, 0.1, 1.0);
    sun = colorGradationGet(&grad_sun, daytime);
    lightingSetSunColor(sun);*/

    sky = skyCreateDefinition();
    sceneryGetSky(&sky);
    sky.daytime = daytime;
    scenerySetSky(&sky);
    skyDeleteDefinition(&sky);
}

void autoGenRealisticLandscape(int seed)
{
    AtmosphereDefinition atmosphere;
    TerrainDefinition terrain;
    WaterDefinition water;
    CloudsDefinition clouds;
    CloudsLayerDefinition* cloud;
    SkyDefinition sky;
    TexturesDefinition textures;
    TextureLayerDefinition* texture;
    LightingDefinition lighting;
    HeightModifier* mod;
    Zone* zone;

    if (!seed)
    {
        seed = time(NULL);
    }
    srand(seed);

    /* Cloud layer */
    clouds = cloudsCreateDefinition();
    cloud = cloudsGetLayer(&clouds, cloudsAddLayer(&clouds));
    cloud->ymin = 10.0;
    cloud->ycenter = 40.0;
    cloud->ymax = 100.0;
    cloud->color.r = 0.7;
    cloud->color.g = 0.7;
    cloud->color.b = 0.7;
    cloud->color.a = 0.05;
    cloud->scaling = 50.0;
    cloud->coverage = 0.5;
    noiseGenerateBaseNoise(cloud->noise, 262144);
    noiseAddLevelSimple(cloud->noise, 50.0, 0.3);
    noiseAddLevelSimple(cloud->noise, 50.0 / 2.0, 0.2);
    noiseAddLevelSimple(cloud->noise, 50.0 / 4.0, 0.1);
    noiseAddLevelSimple(cloud->noise, 50.0 / 10.0, 0.05);
    noiseAddLevelSimple(cloud->noise, 50.0 / 20.0, 0.03);
    noiseAddLevelSimple(cloud->noise, 50.0 / 40.0, 0.02);
    noiseAddLevelSimple(cloud->noise, 50.0 / 60.0, 0.01);
    noiseAddLevelSimple(cloud->noise, 50.0 / 80.0, 0.005);
    noiseAddLevelSimple(cloud->noise, 50.0 / 100.0, 0.02);
    noiseAddLevelSimple(cloud->noise, 50.0 / 150.0, 0.005);
    noiseAddLevelSimple(cloud->noise, 50.0 / 200.0, 0.003);
    noiseAddLevelSimple(cloud->noise, 50.0 / 400.0, 0.008);
    noiseAddLevelSimple(cloud->noise, 50.0 / 800.0, 0.001);
    noiseAddLevelSimple(cloud->noise, 50.0 / 1000.0, 0.0005);
    scenerySetClouds(&clouds);
    cloudsDeleteDefinition(&clouds);

    /* Water */
    water = waterCreateDefinition();
    water.height = 0.0;
    water.transparency = 0.5;
    water.reflection = 0.3;
    water.transparency_depth = 6.0;
    water.material.base.r = 0.1;
    water.material.base.g = 0.3;
    water.material.base.b = 0.4;
    water.material.base.a = 1.0;
    water.material.reflection = 1.0;
    water.material.shininess = 12.0;
    water.depth_color.r = 0.0;
    water.depth_color.g = 0.2;
    water.depth_color.b = 0.3;
    water.depth_color.a = 1.0;
    water.lighting_depth = 3.0;
    water.waves_noise_height = 0.015;
    water.waves_noise_scale = 0.2;
    noiseGenerateBaseNoise(water.waves_noise, 262144);
    noiseAddLevelsSimple(water.waves_noise, 2, 1.0, 1.0);
    noiseAddLevelsSimple(water.waves_noise, 3, 0.15, 0.1);
    scenerySetWater(&water);
    waterDeleteDefinition(&water);

    /* Sky */
    sky = skyCreateDefinition();
    colorGradationAddRgba(&sky.sun_color, 0.3, 1.0, 0.91, 0.8, 1.0);
    colorGradationAddRgba(&sky.sun_color, 0.5, 1.0, 0.95, 0.9, 1.0);
    colorGradationAddRgba(&sky.sun_color, 0.7, 1.0, 0.91, 0.8, 1.0);
    colorGradationAddRgba(&sky.zenith_color, 0.2, 0.03, 0.03, 0.05, 1.0);
    colorGradationAddRgba(&sky.zenith_color, 0.25, 0.25, 0.33, 0.37, 1.0);
    colorGradationAddRgba(&sky.zenith_color, 0.35, 0.52, 0.63, 0.8, 1.0);
    colorGradationAddRgba(&sky.zenith_color, 0.65, 0.52, 0.63, 0.8, 1.0);
    colorGradationAddRgba(&sky.zenith_color, 0.75, 0.25, 0.33, 0.37, 1.0);
    colorGradationAddRgba(&sky.zenith_color, 0.8, 0.03, 0.03, 0.05, 1.0);
    colorGradationAddRgba(&sky.haze_color, 0.2, 0.05, 0.05, 0.08, 1.0);
    colorGradationAddRgba(&sky.haze_color, 0.25, 0.55, 0.42, 0.42, 1.0);
    colorGradationAddRgba(&sky.haze_color, 0.3, 0.6, 0.6, 0.6, 1.0);
    colorGradationAddRgba(&sky.haze_color, 0.4, 0.92, 0.93, 1.0, 1.0);
    colorGradationAddRgba(&sky.haze_color, 0.6, 0.92, 0.93, 1.0, 1.0);
    colorGradationAddRgba(&sky.haze_color, 0.7, 0.6, 0.6, 0.8, 1.0);
    colorGradationAddRgba(&sky.haze_color, 0.75, 0.62, 0.50, 0.42, 1.0);
    colorGradationAddRgba(&sky.haze_color, 0.8, 0.05, 0.05, 0.08, 1.0);
    sky.daytime = 0.0;
    sky.haze_height = 0.75;
    sky.haze_smoothing = 0.3;
    sky.sun_radius = 0.02;
    scenerySetSky(&sky);
    skyDeleteDefinition(&sky);

    /* Lighting */
    lighting = lightingCreateDefinition();
    lighting.autosetfromsky = 1;
    scenerySetLighting(&lighting);
    lightingDeleteDefinition(&lighting);

    /* Terrain */
    terrain = terrainCreateDefinition();
    noiseGenerateBaseNoise(terrain.height_noise, 1048576);
    noiseAddLevelsSimple(terrain.height_noise, 10, 1.0, 1.0);
    terrain.height_factor = 12.0 / noiseGetMaxValue(terrain.height_noise);
    terrain.scaling = 10.0;
    /* DEBUG */
    mod = modifierCreate();
    zone = modifierGetZone(mod);
    zoneIncludeCircleArea(zone, 0.4, 0.0, 0.0, 8.0, 20.0);
    modifierActionFixValue(mod, -2.0);
    terrainAddModifier(&terrain, mod);
    modifierDelete(mod);
    mod = modifierCreate();
    zone = modifierGetZone(mod);
    zoneIncludeCircleArea(zone, 1.0, 0.0, 0.0, 0.3, 8.0);
    modifierActionAddValue(mod, 8.0);
    terrainAddModifier(&terrain, mod);
    modifierDelete(mod);
    mod = modifierCreate();
    zone = modifierGetZone(mod);
    zoneIncludeCircleArea(zone, 0.8, 0.0, 0.0, 0.3, 4.0);
    modifierActionFixValue(mod, -8.0);
    terrainAddModifier(&terrain, mod);
    /* DEBUG */
    scenerySetTerrain(&terrain);
    terrainDeleteDefinition(&terrain);

    /* Textures */
    textures = texturesCreateDefinition();
    texture = texturesGetLayer(&textures, texturesAddLayer(&textures));
    noiseGenerateBaseNoise(texture->bump_noise, 102400);
    noiseAddLevelsSimple(texture->bump_noise, 6, 0.01, 0.01);
    texture->color.r = 0.6;
    texture->color.g = 0.55;
    texture->color.b = 0.57;
    texture = texturesGetLayer(&textures, texturesAddLayer(&textures));
    zoneAddHeightRange(texture->zone, 1.0, -1.0, 0.0, 3.0, 15.0);
    zoneAddSteepnessRange(texture->zone, 1.0, 0.0, 0.0, 0.2, 0.3);
    noiseGenerateBaseNoise(texture->bump_noise, 102400);
    noiseAddLevelsSimple(texture->bump_noise, 6, 0.02, 0.008);
    texture->color.r = 0.2;
    texture->color.g = 0.24;
    texture->color.b = 0.05;
    /*texture = texturesGetLayer(&textures, texturesAddLayer(&textures));
    zoneAddHeightRange(texture->zone, 1.0, 3.0, 4.0, 100.0, 100.0);
    noiseGenerateBaseNoise(texture->bump_noise, 102400);
    noiseAddLevelsSimple(texture->bump_noise, 6, 0.04, 0.003);
    texture->color.r = 1.0;
    texture->color.g = 1.0;
    texture->color.b = 1.0;
    texturesSetDefinition(layer, texture);
    texturesDeleteDefinition(texture);*/
    scenerySetTextures(&textures);
    texturesDeleteDefinition(&textures);

    /* Atmosphere */
    atmosphere = atmosphereCreateDefinition();
    atmosphere.distance_near = 20.0;
    atmosphere.distance_far = 100.0;
    atmosphere.full_mask = 0.6;
    atmosphere.auto_lock_on_haze = 1;
    scenerySetAtmosphere(&atmosphere);
    atmosphereDeleteDefinition(&atmosphere);
}

void* _renderFirstPass(void* data)
{
    sceneryRenderFirstPass((Renderer*)data);
    _is_rendering = 0;
    return NULL;
}

void autoRenderSceneTwoPass(Renderer* renderer, int postonly)
{
    Thread* thread;
    int loops;

    if (!postonly)
    {
        renderClear();

        _is_rendering = 1;
        thread = threadCreate(_renderFirstPass, renderer);
        loops = 0;

        while (_is_rendering)
        {
            timeSleepMs(100);

            if (++loops >= 10)
            {
                renderUpdate();
                loops = 0;
            }
        }

        threadJoin(thread);
    }
    sceneryRenderSecondPass(renderer);
}

static int _postProcessRayTracingOverlay(RenderFragment* fragment)
{
    Vector3 terrain_hit, look;

    // TODO
    /*look = v3Sub(fragment->vertex.location, camera_location);
    if (!terrainProjectRay(camera_location, look, &terrain_hit, &fragment->vertex.color))
    {
        fragment->vertex.color = skyProjectRay(camera_location, look);
    }*/

    return 1;
}

void autoRenderSceneRayTracing()
{
    // TODO
    /*renderClear();
    cameraPushOverlay(COLOR_RED, _postProcessRayTracingOverlay);
    renderUpdate();

    if (renderSetNextProgressStep(0.0, 1.0))
    {
        renderPostProcess(_cpu_count);
    }*/
}