#pragma once

#include "anm2.h"
#include <vector>

struct Game;

struct Particle
{
    Color color;
    Vec2 position;
    Vec2 velocity;
    float fill;
    float gravity;
    float life;
    float lifeMax;
    float size;
};

void particle_draw(Renderer& renderer, Particle& particle, Vec2 position);

// Text that hops up from where it appears and fades, like damage numbers. Jitter shakes it, in pixels.
// Damage numbers also keep their value and which target they're over, so quick hits can add up.
struct Popup
{
    Color color;
    Vec2 position;
    Vec2 velocity;
    char text[16];
    float jitter;
    float life;
    float scale;
    int target;
    int value;
};

// Damage dealt at a moment in game time, for the DPS readout.
struct Hit
{
    float time = 0;
    int amount = 0;
};

// A muzzle flash: a brief white star at the barrel, pointing along the shot.
struct Flash
{
    Color color;
    Vec2 position;
    float angle = 0;
    float life = 0;
    float size = 0;
    // The fighter, hand and weapon that fired it, for keeping it on the muzzle (see Scene::flash_follow).
    int owner = 0;
    int hand = 0;
    int weapon = 0;
};

// A fading copy of a sprite left behind by something moving fast, and what its fighter wore (nothing, FASHION_NONE,
// for an attack's).
struct Afterimage
{
    Pose pose;
    float life = 0;
    int worn = 0;
};

// Particles, afterimages, text popups, screen shake and the damage-per-second tally.
class Effects
{
public:
    void burst(Burst burst, Vec2 position, float angle, Color color);
    void afterimage_spawn(Pose pose, int worn);
    void flash_spawn(Flash flash);
    void afterimage_draw(Game& game);
    void number_spawn(Vec2 position, int value, int target, Color color);
    void dps_record(int amount);
    float dps_get();
    void popup_spawn(Vec2 position, const char* text, Color color);
    void shake_add(float amount);
    Vec2 shake_get();
    void update();
    void draw(Game& game);
    void clear();

private:
    std::vector<Afterimage> afterimages;
    std::vector<Flash> flashes;
    std::vector<Hit> hits;
    std::vector<Particle> particles;
    std::vector<Popup> popups;
    float shake = 0;
    int ticks = 0;
};