/*
 * Copyright Luka Jankovic 2025
 *
 * This file is part of Kubo.
 *
 * Kubo is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * Kubo is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * Kubo. If not, see <https://www.gnu.org/licenses/>.
 */

#include "kubo_camera.h"

void kubo_camera_zoom(Camera2D *camera) {
    float wheel = GetMouseWheelMove();
    if (wheel != 0) {
        Vector2 mouseWorldPos = GetScreenToWorld2D(GetMousePosition(), *camera);
        camera->offset = GetMousePosition();
        camera->target = mouseWorldPos;

        float scale = 0.2f * wheel;
        camera->zoom = Clamp(expf(logf(camera->zoom) + scale), 0.125f, 64.0f);
    }
}

void kubo_camera_pan(Camera2D *camera) {
    Vector2 delta = GetMouseDelta();
    delta = Vector2Scale(delta, -1.0f / camera->zoom);
    kubo_camera_shift(camera, delta);
}

void kubo_camera_shift(Camera2D *camera, Vector2 delta) {
    camera->target = Vector2Add(camera->target, delta);
}

void kubo_camera_reset(Camera2D *camera) {
    camera->target = (Vector2){ .x = 0, .y = 0 };
    camera->offset = (Vector2){ .x = 0, .y = 0 };
    camera->zoom = 1.0f;
}