//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//
//=============================================================================//
#if !defined(IINPUT_H)
#define IINPUT_H
#ifdef _WIN32
#pragma once
#endif

class bf_write;
class bf_read;
class CUserCmd;
class C_BaseCombatWeapon;
struct kbutton_t;

struct CameraThirdData_t {
    float m_flPitch;
    float m_flYaw;
    float m_flDist;
    float m_flLag;
    Vector m_vecHullMin;
    Vector m_vecHullMax;
};

abstract_class IInput {
   public:
    // Initialization/shutdown of the subsystem
    virtual void Init_All(void) = 0;
    virtual void Shutdown_All(void) = 0;
    // Latching button states
    virtual int GetButtonBits(int) = 0;
    // Create movement command
    virtual void CreateMove(int sequence_number, float input_sample_frametime,
                            bool active) = 0;
    virtual void ExtraMouseSample(float frametime, bool active) = 0;
    virtual bool WriteUsercmdDeltaToBuffer(bf_write * buf, int from, int to,
                                           bool isnewcommand) = 0;
    virtual void EncodeUserCmdToBuffer(bf_write & buf, int slot) = 0;
    virtual void DecodeUserCmdFromBuffer(bf_read & buf, int slot) = 0;

    virtual CUserCmd *GetUserCmd(int sequence_number) = 0;

    virtual void MakeWeaponSelection(C_BaseCombatWeapon * weapon) = 0;

    // Retrieve key state
    virtual float KeyState(kbutton_t * key) = 0;
    // Issue key event
    virtual int KeyEvent(int eventcode, ButtonCode_t keynum,
                         const char *pszCurrentBinding) = 0;
    // Look for key
    virtual kbutton_t *FindKey(const char *name) = 0;

    // Issue commands from controllers
    virtual void ControllerCommands(void) = 0;
    // Extra initialization for some joysticks
    virtual void Joystick_Advanced(void) = 0;
    virtual void Joystick_SetSampleTime(float frametime) = 0;
    virtual void IN_SetSampleTime(float frametime) = 0;

    // Accumulate mouse delta
    virtual void AccumulateMouse(void) = 0;
    // Activate/deactivate mouse
    virtual void ActivateMouse(void) = 0;
    virtual void DeactivateMouse(void) = 0;

    // Clear mouse state data
    virtual void ClearStates(void) = 0;
    // Retrieve lookspring setting
    virtual float GetLookSpring(void) = 0;

    // Retrieve mouse position
    virtual void GetFullscreenMousePos(int *mx, int *my, int *unclampedx = 0,
                                       int *unclampedy = 0) = 0;
    virtual void SetFullscreenMousePos(int mx, int my) = 0;
    virtual void ResetMouse(void) = 0;
    virtual float GetLastForwardMove(void) = 0;
    virtual float Joystick_GetForward(void) = 0;
    virtual float Joystick_GetSide(void) = 0;
    virtual float Joystick_GetPitch(void) = 0;
    virtual float Joystick_GetYaw(void) = 0;

    // Third Person camera ( TODO/FIXME:  Move this to a separate interface? )
    virtual void CAM_Think(void) = 0;
    virtual int CAM_IsThirdPerson(void) = 0;
    virtual void CAM_ToThirdPerson(void) = 0;
    virtual void CAM_ToFirstPerson(void) = 0;
    virtual void CAM_StartMouseMove(void) = 0;
    virtual void CAM_EndMouseMove(void) = 0;
    virtual void CAM_StartDistance(void) = 0;
    virtual void CAM_EndDistance(void) = 0;
    virtual int CAM_InterceptingMouse(void) = 0;

    // orthographic camera info	( TODO/FIXME:  Move this to a separate
    // interface? )
    virtual void CAM_ToOrthographic() = 0;
    virtual bool CAM_IsOrthographic() const = 0;
    virtual void CAM_OrthographicSize(float &w, float &h) const = 0;

#if defined(HL2_CLIENT_DLL)
    // IK back channel info
    virtual void AddIKGroundContactInfo(int entindex, float minheight,
                                        float maxheight) = 0;
#endif

    virtual void LevelInit(void) = 0;

    // Causes an input to have to be re-pressed to become active
    virtual void ClearInputButton(int bits) = 0;

    virtual void CAM_SetCameraThirdData(CameraThirdData_t * pCameraData,
                                        const QAngle &vecCameraOffset) = 0;
    virtual void CAM_CameraThirdThink(void) = 0;

    virtual bool EnableJoystickMode() = 0;
};

extern ::IInput *input;

#endif  // IINPUT_H