/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   rendering.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: bszilas <bszilas@student.42vienna.com>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/09/12 19:50:16 by vvobis            #+#    #+#             */
/*   Updated: 2025/05/31 13:41:08 by victor           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "../../minirt.h"

void    get_background_color(t_scene *sc, t_pixel *px, t_vector v)
{
    t_body        skysphere;
    t_hit_point    hit;

    if (sc->sky_sphere)
    {
        hit.p = v;
        ft_bzero(&skysphere, sizeof(t_body));
        skysphere.textured = true;
        skysphere.texture = &sc->sky;
        skysphere.sphere.radius = 1;
        get_color_sphere(&skysphere, &hit, px);
    }
    else
        *px->color = uint_to_color(0x000000);
}

void    reduce_light_intensity(t_light *light, uint light_count)
{
    uint    i;

    i = 0;
    while (i < light_count)
        light[i++].intensity *= 0.9;
}

void    trace_reflection(t_pixel *pixel, t_hit_point hit, t_scene new_scene)
{
    uint    mirror_id;
    double    mirror_dist;

    reduce_light_intensity(new_scene.light, new_scene.light_count);
    new_scene.camera.position = hit.p;
    new_scene.depth += 1;
    mirror_id = pixel->id;
    mirror_dist = pixel->dist;
    pixel->dist = -1;
    ray_check_bodys(pixel, hit.r, &new_scene);
    if (pixel->dist == -1)
        get_background_color(&new_scene, pixel, hit.r);
    pixel->id = mirror_id;
    pixel->dist = mirror_dist;
}

void    ray_check_bodys(t_pixel *pixel, t_vector ray, t_scene *scene)
{
    uint    j;
    t_body    *body;

    j = 0;
    pixel->id = 0;
    body = scene->body;
    while (body[j].type != BODY_END && j < scene->body_cursor)
    {
        if (body[j].type == BODY_SPHERE)
            pixel_sphere_set(pixel, ray, body + j, scene);
        else if (body[j].type == BODY_PLANE)
            trace_plane(pixel, ray, body + j, scene);
        else if (body[j].type == BODY_CYLINDER)
            trace_cyl(pixel, ray, body + j, scene);
        else if (body[j].type == BODY_DISK)
            trace_disk(pixel, ray, body + j, scene);
        else if (body[j].type == BODY_CONE)
            trace_cone(pixel, ray, body + j, scene);
        j++;
    }
    if (!pixel->id)
    {
        get_background_color(scene, pixel, ray);
        pixel_fill(pixel, scene);
    }
}

uint    rendering_loop(t_data *data)
{
    if (data->should_rerender) {
#ifndef __EMSCRIPTEN__
        pthread_rwlock_unlock(&data->rwlock);
        pthread_barrier_wait(&data->barrier);
        pthread_rwlock_wrlock(&data->rwlock);
        pthread_barrier_wait(&data->barrier);
#else
        define_camera_rays(data->pixel, &data->scene.camera, &data->scene);
#endif /* ifndef __EMSCRITPEN */
        glyph_print(1, 1, "Press 'y' for help", data->pixel);
        if (data->current_menu)
            container_draw(data, data->current_menu);
        if (data->func_ptr) {
            data->func_ptr(data, data->func_ptr_param);
        }

    }
    UpdateTexture(data->texture, data->pixel_colors);

    BeginDrawing();
    DrawTexture(data->texture, 0, 0, RAYWHITE);
#ifdef __EMSCRIPTEN__
    Vector2 pos = GetMousePosition();
    DrawCircleV(pos, (float)data->scene.w / 100, RED);
#endif
    EndDrawing();
    return (0);
}