/**************************************************************************
*
* Copyright (c) 2026-2026 Diality Inc. - All Rights Reserved.
*
* THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
* WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
*
* @file    ModePostTreat.c
*
* @author  (last)      Praneeth Bunne
* @date    (last)      15-May-2026
*
* @author  (original)  Praneeth Bunne
* @date    (original)  17-Apr-2026
*
***************************************************************************/

#include "BloodFlow.h"
#include "Buttons.h"
#include "ModePostTreat.h"
#include "OperationModes.h"
#include "Switches.h"
#include "SyringePump.h"
#include "TubeSetAutoEject.h"
#include "TxParams.h"

/**
 *  @addtogroup TDPostTreatmentMode
 *  @{
 */

// ********** private definitions **********

static BOOL patientDisconnectionConfirmed;                                      ///< Flag indicates user confirms patient disconnection.
static bool patientDisconnectHandled;                                           ///< Flag indicates patient disconnect actions have been handled
static BOOL disposableRemovalConfirmed;                                         ///< Flag indicates user confirms disposable removal.
static TD_POST_TREATMENT_STATE_T currentPostTreatmentState;                     ///< Current Post-Treatment sub-state

// ********** private function prototypes **********

static void setPostTreatStateTransition( void );
static TD_POST_TREATMENT_STATE_T handlePatientDisconnectionState( void );
static TD_POST_TREATMENT_STATE_T handleAutoEjectState( void );
static TD_POST_TREATMENT_STATE_T handleDisposableRemovalState(void );
static TD_POST_TREATMENT_STATE_T handleVerifyState( void );

/*********************************************************************//**
* @brief
* The initPostTreatmentMode function initializes the Post-Treatment mode.
* @details \b Inputs: none
* @details \b Outputs: Resets all Post-Treatment sub-state variables.
* @return none
**************************************************************************/
void initPostTreatmentMode( void )
{
    patientDisconnectionConfirmed    = FALSE;
    patientDisconnectHandled         = FALSE;
    disposableRemovalConfirmed       = FALSE;
    currentPostTreatmentState = TD_POST_TREATMENT_AUTO_EJECT_STATE;
}

/*********************************************************************//**
* @brief
* The transitionToPostTreatmentMode function prepares the system for
* entry into Post-Treatment mode.
* @details \b Inputs:  none
* @details \b Outputs: Initializes mode specific state and returns the starting
* Post-Treatment sub-state.
* @return Initial Post-Treatment sub-state
**************************************************************************/
U32  transitionToPostTreatmentMode( void )
{
    initPostTreatmentMode();
    initTubeSetAutoEject();
    doorClosedRequired(TRUE);
    setPostTreatStateTransition();

    return (U32)currentPostTreatmentState;
}

/*********************************************************************//**
* @brief
* The setPostTreatStateTransition function sets the actuators and variables
* for the state transition in Post-Treatment mode.
* @details \b Inputs: Valve states, Pump speed
* @details \b Outputs: Actuate valves, pumps as desired
* @Param state Post-Treatment state enum
* @return none
**************************************************************************/
static void setPostTreatStateTransition( void )
{
    switch( currentPostTreatmentState )
    {
        case TD_POST_TREATMENT_PATIENT_DISCONNECTION_STATE:
            //TODO: actuator configuration;
            break;

        case TD_POST_TREATMENT_AUTO_EJECT_STATE:
            signalBloodPumpHardStop();
            break;

        case TD_POST_TREATMENT_DISPOSABLE_REMOVAL_STATE:
            //TODO: actuator configuration;
            break;

        case TD_POST_TREATMENT_VERIFY_STATE:
            //TODO: actuator configuration;
            break;

         default:
             SET_ALARM_WITH_2_U32_DATA( ALARM_ID_TD_SOFTWARE_FAULT, SW_FAULT_ID_MODE_POST_TREATMENT_INVALID_STATE1, currentPostTreatmentState );
             break;
    }
}

/*********************************************************************//**
 * @brief
 * The execPostTreatmentMode function executes the Post-Treatment
 * mode state machine.
 * @details \b Inputs: stop button status and system conditions via helpers.
 * @details \b Outputs: Advances the Post-Treatment sub-state
 * @return current Post-Treatment sub-state.
 *************************************************************************/
U32 execPostTreatmentMode( void )
{
    BOOL stop = isStopButtonPressed();
    TD_POST_TREATMENT_STATE_T prevPostTreatmentState = currentPostTreatmentState;

    // Execute mode state machine
    switch ( currentPostTreatmentState )
    {
        case TD_POST_TREATMENT_PATIENT_DISCONNECTION_STATE:
            currentPostTreatmentState = handlePatientDisconnectionState();
            break;

        case TD_POST_TREATMENT_AUTO_EJECT_STATE:
            currentPostTreatmentState = handleAutoEjectState();
            break;

        case TD_POST_TREATMENT_DISPOSABLE_REMOVAL_STATE:
            currentPostTreatmentState = handleDisposableRemovalState();
            break;

        case TD_POST_TREATMENT_VERIFY_STATE:
            currentPostTreatmentState = handleVerifyState();
            break;

        case TD_POST_TREATMENT_DISINFECTION_STATE:
            //currentPostTreatmentState = handleDisinfectionState();
            break;

        default:
            SET_ALARM_WITH_2_U32_DATA( ALARM_ID_TD_SOFTWARE_FAULT, SW_FAULT_ID_MODE_POST_TREATMENT_INVALID_STATE, currentPostTreatmentState );
            break;
    }

    if ( prevPostTreatmentState != currentPostTreatmentState)
    {
        setPostTreatStateTransition();
    }

    return (U32)currentPostTreatmentState;
}

/*********************************************************************//**
 * @brief
 * The checkPostTreatmentPatientDisconnect function checks UI patient
 * disconnect and handles valve release, pump homing, door requirement.
 * @details \b Inputs: patientDisconnectionConfirmed, patientDisconnectHandled
 * @details \b Outputs: patientDisconnectHandled, home pumps, open valves,
 *                   retract syringe, door closed requirement.
 * @return none
 *************************************************************************/
static void checkPostTreatmentPatientDisconnect( void )
{
//    VALVE_T valve;

    if ( ( TRUE == patientDisconnectionConfirmed ) && ( FALSE == patientDisconnectHandled ) )
    {
        // home valves and pumps while front door is still closed.
        homeBloodPump();
//        for ( valve = VDI; valve < NUM_OF_VALVES; valve++ )
        {
//            setValvePosition( valve, VALVE_POSITION_A_INSERT_EJECT );
        }
        if ( ( getTreatmentParameterF32( TREATMENT_PARAM_HEPARIN_BOLUS_VOLUME ) > 0.0 ) ||
             ( getTreatmentParameterF32( TREATMENT_PARAM_HEPARIN_DELIVERY_RATE ) > 0.0 ) )
        {
            retractSyringePump();
        }
        doorClosedRequired( FALSE );
        // NOTE: patientDisconnectionConfirmed is NOT reset because
        // Patient Disconnect State needs it to move to next state
        patientDisconnectHandled = TRUE;
    }
}

/*********************************************************************//**
 * @brief
 * The handlePatientDisconnectionState function executes the Post-Treatment
 * mode Patient Disconnection state machine.
 * @details \b Inputs: none
 * @details \b Outputs: processed patient disconnection confirmation
 * @return next post-treatment mode state
 *************************************************************************/
static TD_POST_TREATMENT_STATE_T handlePatientDisconnectionState( void )
{
    TD_POST_TREATMENT_STATE_T state = TD_POST_TREATMENT_PATIENT_DISCONNECTION_STATE;

    checkPostTreatmentPatientDisconnect();

    if ( TRUE == patientDisconnectionConfirmed )
    {
        patientDisconnectionConfirmed = FALSE;
        patientDisconnectHandled      = FALSE;
        state                         = TD_POST_TREATMENT_DISPOSABLE_REMOVAL_STATE;
    }

    return state;
}

/*********************************************************************//**
 * @brief
 * The handleAutoEjectState function calls Tube Set Auto-Eject Service and
 * advances to Disposable removal state once the service signals
 * completion.
 * @details \b Inputs: none
 * @details \b Outputs: Advances Post-Treatment state when eject is complete.
 * @return next Post-Treatment mode state
 *************************************************************************/
static TD_POST_TREATMENT_STATE_T handleAutoEjectState( void )
{
    TD_POST_TREATMENT_STATE_T state = TD_POST_TREATMENT_AUTO_EJECT_STATE;

    // call tube set eject service to auto-eject tube set
    execTubeSetAutoEject();

    if( TRUE == isTubeSetAutoEjectComplete() )
    {
        state = TD_POST_TREATMENT_DISPOSABLE_REMOVAL_STATE;
    }

    return state;
}

/*********************************************************************//**
 * @brief
 * The handleDisposableRemovalState function executes the Post-Treatment
 * mode Disposable Removal state machine.
 * @details \b Inputs: disposableRemovalConfirmed
 * @details \b Outputs: processed disposable removal confirmation
 * @return next post-treatment mode state
 *************************************************************************/
static TD_POST_TREATMENT_STATE_T handleDisposableRemovalState( void )
{
    TD_POST_TREATMENT_STATE_T state = TD_POST_TREATMENT_DISPOSABLE_REMOVAL_STATE;

    if ( TRUE == disposableRemovalConfirmed )
    {
        disposableRemovalConfirmed = FALSE;
        state                      = TD_POST_TREATMENT_VERIFY_STATE;
    }

    return state;
}

/*********************************************************************//**
 * @brief
 * The handleVerifyState function executes the Post-Treatment
 * mode Verify state machine.
 * @details \b Inputs: TODO fill up if any
 * @details \b Outputs: TODO fill up if any
 * @return next post-treatment mode state
 *************************************************************************/
static TD_POST_TREATMENT_STATE_T handleVerifyState( void )
{
    TD_POST_TREATMENT_STATE_T state = TD_POST_TREATMENT_VERIFY_STATE;

    // TODO

    return state;
}

/*********************************************************************//**
 * @brief
 * The signalUserConfirmPatientDisconnection signals post-treatment mode
 * user has confirmed patient disconnection.
 * @details \b Inputs: none
 * @details \b Outputs: patientDisconnectedConfirm
 * @return none
 *************************************************************************/
void signalUserConfirmPatientDisconnection( void )
{
    patientDisconnectionConfirmed = TRUE;
}

/*********************************************************************//**
 * @brief
 * The signalUserConfirmDisposableRemoval signals post-treatment mode
 * user has confirmed disposable removal.
 * @details \b Inputs: none
 * @details \b Outputs: disposableRemovalConfirmed
 * @return none
 *************************************************************************/
void signalUserConfirmDisposableRemoval( void )
{
    disposableRemovalConfirmed = TRUE;
}

/**@}*/