#pragma once
#include "hd2d/Billboard.h"
#include "hd2d/GroundOcclusion.h"
#include "hd2d/Model.h"
#include "hd2d/Particles.h"
#include "hd2d/Terrain.h"
#include "hd2d/Water.h"

#include <glm/glm.hpp>
#include <vector>

namespace hd2d {

struct PointLight {
    glm::vec3 position{0.0f};
    float radius = 3.0f;
    glm::vec3 color{1.0f};  // linear HDR
};

struct Sun {
    float azimuth = -0.6f;   // radians, rotation around Y (0 = toward -Z, the default view direction)
    float elevation = 0.66f; // radians above horizon
    glm::vec3 color{1.0f, 0.86f, 0.66f};
    float intensity = 3.2f;
    glm::vec3 direction() const;  // unit vector pointing toward the sun
};

struct Sky {
    glm::vec3 zenith{0.22f, 0.42f, 0.78f};
    glm::vec3 horizon{0.70f, 0.76f, 0.80f};
    glm::vec3 ground{0.20f, 0.24f, 0.14f};  // bounce light from below
    float ambient = 0.55f;
    float fill = 0.35f;  // light from the camera side onto faces turned toward the viewer
};

// Everything the renderer draws. Pointers are non-owning; null entries skip.
struct Scene {
    Terrain* terrain = nullptr;
    Water* water = nullptr;
    ParticleSystem* particles = nullptr;
    std::vector<BillboardBatch*> billboards;  // pixel-art sprites (characters, small props)
    std::vector<ModelBatch*> models;          // 3D scenery (trees, bushes, rocks, bridge)
    const GroundOcclusion* groundOcclusion = nullptr;  // baked contact AO under scenery
    std::vector<PointLight> lights;
    int volumetricLights = 0;  // the first N lights also scatter in the fog (e.g. fires)
    Sun sun;
    Sky sky;
    glm::vec3 focusPoint{0.0f};    // depth-of-field focus (usually the player)
    glm::vec3 interactor{0.0f};    // pushes foliage aside (usually the player)
    float interactorRadius = 1.1f;
    glm::vec3 blobShadowPos{0.0f}; // soft contact shadow under the player
    float blobShadowRadius = 0.0f; // 0 disables

    // Precipitation, usually driven by Weather.
    float rain = 0.0f;       // 0..1: rain streaks, water ripples, overcast sky
    float wetness = 0.0f;    // 0..1: darker, glossy surfaces (lags behind `rain`)
    float rainSpeed = 15.0f; // drop fall speed (world units / s)
};

}  // namespace hd2d