#pragma once

// ============================================================================
// camera_controller.h - 增强相机控制器（飞行 / 步行模式）
// ============================================================================

#include "camera.h"
#include "../ASM/math_c_fallback.h"

typedef enum {
    CAMERA_MODE_FLY,
    CAMERA_MODE_WALK,
} CameraMode;

typedef struct {
    Camera* camera;
    CameraMode mode;
    float move_speed;
    float mouse_sensitivity;
    float height_offset; // 步行模式眼睛离地面高度
    float pitch_min;
    float pitch_max;
    float yaw;
    float pitch;
    float (*ground_height_fn)(float x, float z, void* user);
    void* ground_user;
} CameraController;

CameraController camera_controller_create(Camera* camera);

// 更新 yaw/pitch，鼠标输入以 delta 像素为单位
void camera_controller_look(CameraController* ctrl, float delta_x, float delta_y);

// 移动：dir 为本地空间方向 (x=右, y=上, z=前)
void camera_controller_move(CameraController* ctrl, Vec3 dir, float dt);

// 设置地形高度采样回调
void camera_controller_set_ground_callback(CameraController* ctrl, float (*get_height)(float x, float z, void* user), void* user);

// 切换模式
void camera_controller_set_mode(CameraController* ctrl, CameraMode mode);

// 每帧应用约束（如步行贴地）
void camera_controller_update(CameraController* ctrl, float dt);