use glam::{EulerRot, Mat3, Mat4, Vec2, Vec3};

pub struct Camera {
    pos: Vec3,
    rot: Vec3,
    fov: f32,
    aspect: f32,
}

impl Camera {
    pub fn new() -> Self {
        Self {
            aspect: 1.,
            fov: 0.5,
            pos: Vec3::Z * 3.,
            rot: Vec3::ZERO,
        }
    }
    pub fn update(&mut self, input_move: Vec3, input_rot: Vec2, dt: f32) {
        self.pos += input_move * dt;
        self.rot.x += input_rot.x * 0.002;
        self.rot.y += input_rot.y * 0.002;
    }
    pub fn to_matrix(&self) -> Mat4 {
        // let tdir =
        //     Mat3::from_euler(EulerRot::ZXY, self.rot.x, self.rot.y, self.rot.z) * Vec3::NEG_Z;
        // * Mat4::look_at_rh(self.pos, self.pos + tdir, Vec3::Y)

        Mat4::perspective_infinite_reverse_rh(self.fov, self.aspect, 0.1)
            * Mat4::from_mat3(Mat3::from_euler(
                EulerRot::ZXY,
                self.rot.x,
                self.rot.y,
                self.rot.z,
            ))
    }
}