/************************************************************
  * @brief   button_drive
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0.1
  * @note    button.c
  ***********************************************************/

#include "button.h"

#ifdef HUALI_PKG_USING_BUTTON

/*******************************************************************
 *                          Variable Declaration                              
 *******************************************************************/

static struct button* Head_Button = RT_NULL;


/*******************************************************************
 *                         Function Declaration   
 *******************************************************************/
static char *StrnCopy(char *dst, const char *src, rt_uint32_t n);
static void Print_Btn_Info(Button_t* btn);
static void Add_Button(Button_t* btn);


/************************************************************
  * @brief   Create a Button 
  * @param   name:button name 
  * @param   btn:button structure
  * @param   read_btn_level:Button trigger level reading function,
  *                 Return the level of the rt_uint8_t type by yourself
  * @param   btn_trigger_level:Button trigger level
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  * @note    RT_NULL
  ***********************************************************/
void Button_Create(const char *name,
                  Button_t *btn, 
                  rt_uint8_t(*read_btn_level)(void),
                  rt_uint8_t btn_trigger_level)
{
  if( btn == RT_NULL)
  {
    RT_DEBUG_LOG(RT_DEBUG_THREAD,("struct button is RT_NULL!"));
  }
  
  memset(btn, 0, sizeof(struct button));      //Clear structure information
 
  StrnCopy(btn->Name, name, BTN_NAME_MAX);    //button name 
  
  
  btn->Button_State = NONE_TRIGGER;                     //Button status
  btn->Button_Last_State = NONE_TRIGGER;                //Button last status
  btn->Button_Trigger_Event = NONE_TRIGGER;             //Button trigger event
  btn->Read_Button_Level = read_btn_level;              //Button trigger level reading function
  btn->Button_Trigger_Level = btn_trigger_level;        //Button trigger level
  btn->Button_Last_Level = btn->Read_Button_Level();    //Button current level
  btn->Debounce_Time = 0;
  
  RT_DEBUG_LOG(RT_DEBUG_THREAD,("button create success!"));
  
  Add_Button(btn);          //Added to the singly linked list when button created
  
  Print_Btn_Info(btn);      //printf info
 
}

/************************************************************
  * @brief   burron trigger events are attach to callback function
  * @param   btn:button structure
  * @param   btn_event:button events
  * @param   btn_callback : Callback handler after the button is triggered.Need user implementation
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  ***********************************************************/
void Button_Attach(Button_t *btn,Button_Event btn_event,Button_CallBack btn_callback)
{
  if( btn == RT_NULL)
  {
    RT_DEBUG_LOG(RT_DEBUG_THREAD,("struct button is RT_NULL!"));
  }
  
  if(BUTTON_ALL_RIGGER == btn_event)
  {
    for(rt_uint8_t i = 0 ; i < number_of_event-1 ; i++)
      /*A callback function triggered by a button event ,Used to handle button events */
      btn->CallBack_Function[i] = btn_callback;   
  }
  else
  {
    btn->CallBack_Function[btn_event] = btn_callback; 
  }
}

/************************************************************
  * @brief   Delete an already created button
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  * @note    RT_NULL
  ***********************************************************/
void Button_Delete(Button_t *btn)
{
  struct button** curr;
  for(curr = &Head_Button; *curr;) 
  {
    struct button* entry = *curr;
    if (entry == btn) 
    {
      *curr = entry->Next;
    } 
    else
    {
      curr = &entry->Next;
    }
  }
}

/************************************************************
  * @brief   Get Button Event Info
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  ***********************************************************/
void Get_Button_EventInfo(Button_t *btn)
{
  for(rt_uint8_t i = 0 ; i < number_of_event-1 ; i++)
  {
    if(btn->CallBack_Function[i] != 0)
    {
      /* print */
      RT_DEBUG_LOG(RT_DEBUG_THREAD,("Button_Event:%d",i));
    }      
  } 
}

/************************************************************
  * @brief   Get Button Event
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  ***********************************************************/
rt_uint8_t Get_Button_Event(Button_t *btn)
{
  return (rt_uint8_t)(btn->Button_Trigger_Event);
}

/************************************************************
  * @brief   Get Button State
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  ***********************************************************/
rt_uint8_t Get_Button_State(Button_t *btn)
{
  return (rt_uint8_t)(btn->Button_State);
}

/************************************************************
  * @brief   button cycle processing function
  * @param   btn:button structure
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  * @note    This function must be called in a certain period. The recommended period is 20~50ms.
  ***********************************************************/
void Button_Cycle_Process(Button_t *btn)
{
  /* Get the current button level */
  rt_uint8_t current_level = (rt_uint8_t)btn->Read_Button_Level();
  
  /* Button level changes, debounce */
  if((current_level != btn->Button_Last_Level)&&(++(btn->Debounce_Time) >= BUTTON_DEBOUNCE_TIME))
  {
      /* Update current button level */
      btn->Button_Last_Level = current_level;

      /* button is pressed */
      btn->Debounce_Time = 0;
      
      /* If the button is not pressed, change the button state to press (first press / double trigger) */
      if(((btn->Button_State == NONE_TRIGGER) || (btn->Button_State == BUTTON_DOUBLE))
        && current_level == btn->Button_Trigger_Level)
      {
        btn->Button_State = BUTTON_DOWM;
        TRIGGER_CB(BUTTON_DOWM);
      }
      //free button
      else if(btn->Button_State == BUTTON_DOWM)
      {
        btn->Button_State = BUTTON_UP;
        TRIGGER_CB(BUTTON_UP);
        RT_DEBUG_LOG(RT_DEBUG_THREAD,("button release"));
      }
  }
  
  switch(btn->Button_State)
  {
    /* button dowm */
    case BUTTON_DOWM :                                        
    {
      if(btn->Button_Last_Level == btn->Button_Trigger_Level) 
      {
        /* Support continuous triggering */
        #ifdef CONTINUOS_TRIGGER                              

        if(++(btn->Button_Cycle) >= BUTTON_CONTINUOS_CYCLE)
        {
          btn->Button_Cycle = 0;
          btn->Button_Trigger_Event = BUTTON_CONTINUOS; 
          /* continuous triggering */
          TRIGGER_CB(BUTTON_CONTINUOS);                      
          RT_DEBUG_LOG(RT_DEBUG_THREAD,("continuous triggering"));
        }
        
        #else
        
        btn->Button_Trigger_Event = BUTTON_DOWM;
        
        /* Update the trigger event before releasing the button as long press */
        if(++(btn->Long_Time) >= BUTTON_LONG_TIME)            
        {
          #ifdef LONG_FREE_TRIGGER
          
          btn->Button_Trigger_Event = BUTTON_LONG; 
          
          #else
          
          /* Continuous triggering of long press cycles */
          if(++(btn->Button_Cycle) >= BUTTON_LONG_CYCLE)      
          {
            btn->Button_Cycle = 0;
            btn->Button_Trigger_Event = BUTTON_LONG; 
            
            /* long triggering */
            TRIGGER_CB(BUTTON_LONG);    
          }
          #endif
          
          /* Update time overflow */
          if(btn->Long_Time == 0xFF)
          {
            btn->Long_Time = BUTTON_LONG_TIME;
          }
          RT_DEBUG_LOG(RT_DEBUG_THREAD,("Long press"));
        }
          
        #endif
      }

      break;
    } 
    
    /* button up */
    case BUTTON_UP :
    {
      /* Trigger click */
      if(btn->Button_Trigger_Event == BUTTON_DOWM)          
      {
        /* double click */
        if((btn->Timer_Count <= BUTTON_DOUBLE_TIME)&&(btn->Button_Last_State == BUTTON_DOUBLE)) 
        {
          btn->Button_Trigger_Event = BUTTON_DOUBLE;
          TRIGGER_CB(BUTTON_DOUBLE);    
          RT_DEBUG_LOG(RT_DEBUG_THREAD,("double click"));
          btn->Button_State = NONE_TRIGGER;
          btn->Button_Last_State = NONE_TRIGGER;
        }
        else
        {
            btn->Timer_Count=0;
            /* Detection long press failed, clear 0 */
            btn->Long_Time = 0;
          
          #ifndef SINGLE_AND_DOUBLE_TRIGGER

             /* click */
            TRIGGER_CB(BUTTON_CLICK);
          #endif
            btn->Button_State = BUTTON_DOUBLE;
            btn->Button_Last_State = BUTTON_DOUBLE;
          
        }
      }
      
      else if(btn->Button_Trigger_Event == BUTTON_LONG)
      {
        #ifdef LONG_FREE_TRIGGER
          /* Long press */
          TRIGGER_CB(BUTTON_LONG);
        #else
          
          /* Long press free */
          TRIGGER_CB(BUTTON_LONG_FREE);
        #endif
        btn->Long_Time = 0;
        btn->Button_State = NONE_TRIGGER;
        btn->Button_Last_State = BUTTON_LONG;
      } 
      
      #ifdef CONTINUOS_TRIGGER
        /* Press continuously */
        else if(btn->Button_Trigger_Event == BUTTON_CONTINUOS)  
        {
          btn->Long_Time = 0;
           /* Press continuously free */
          TRIGGER_CB(BUTTON_CONTINUOS_FREE);
          btn->Button_State = NONE_TRIGGER;
          btn->Button_Last_State = BUTTON_CONTINUOS;
        } 
      #endif
      
      break;
    }
    
    case BUTTON_DOUBLE :
    {
      /* Update time */
      btn->Timer_Count++;                                      
      if(btn->Timer_Count>=BUTTON_DOUBLE_TIME)
      {
        btn->Button_State = NONE_TRIGGER;
        btn->Button_Last_State = NONE_TRIGGER;
      }
      #ifdef SINGLE_AND_DOUBLE_TRIGGER
      
        if((btn->Timer_Count>=BUTTON_DOUBLE_TIME)&&(btn->Button_Last_State != BUTTON_DOWM))
        {
          btn->Timer_Count=0;
          TRIGGER_CB(BUTTON_CLICK);
          btn->Button_State = NONE_TRIGGER;
          btn->Button_Last_State = BUTTON_DOWM;
        }
        
      #endif

      break;
    }

    default :
      break;
  }
  
}

/************************************************************
  * @brief   Traversing the way to scan the button without losing each button
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  * @note    This function is called periodically, it is recommended to call 20-50ms once.
  ***********************************************************/
void Button_Process(void)
{
  struct button* pass_btn;
  for(pass_btn = Head_Button; pass_btn != RT_NULL; pass_btn = pass_btn->Next)
  {
      Button_Cycle_Process(pass_btn);
  }
}

/************************************************************
  * @brief   Search Button
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  * @note    RT_NULL
  ***********************************************************/
void Search_Button(void)
{
  struct button* pass_btn;
  for(pass_btn = Head_Button; pass_btn != RT_NULL; pass_btn = pass_btn->Next)
  {
    RT_DEBUG_LOG(RT_DEBUG_THREAD,("button node have %s",pass_btn->Name));
  }
}

/************************************************************
  * @brief   Handle all button callback functions
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  * @note    Not implemented yet
  ***********************************************************/
void Button_Process_CallBack(void *btn)
{
  rt_uint8_t btn_event = Get_Button_Event(btn);

  switch(btn_event)
  {
    case BUTTON_DOWM:
    {
      RT_DEBUG_LOG(RT_DEBUG_THREAD,("Add processing logic for your press trigger"));
      break;
    }
    
    case BUTTON_UP:
    {
      RT_DEBUG_LOG(RT_DEBUG_THREAD,("Add processing logic for your trigger release"));
      break;
    }
    
    case BUTTON_DOUBLE:
    {
      RT_DEBUG_LOG(RT_DEBUG_THREAD,("Add processing logic for your double-click trigger"));
      break;
    }
    
    case BUTTON_LONG:
    {
      RT_DEBUG_LOG(RT_DEBUG_THREAD,("Add processing logic for your long press trigger"));
      break;
    }
    
    case BUTTON_LONG_FREE:
    {
      RT_DEBUG_LOG(RT_DEBUG_THREAD,("Add processing logic for your long press trigger free"));
      break;
    }
    
    case BUTTON_CONTINUOS:
    {
      RT_DEBUG_LOG(RT_DEBUG_THREAD,("Add your continuous trigger processing logic"));
      break;
    }
    
    case BUTTON_CONTINUOS_FREE:
    {
      RT_DEBUG_LOG(RT_DEBUG_THREAD,("Add processing logic for your continuous trigger release"));
      break;
    }
      
  } 
}


/**************************** The following is the internal call function ********************/

/************************************************************
  * @brief   Copy the specified length string
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  * @note    RT_NULL
  ***********************************************************/
static char *StrnCopy(char *dst, const char *src, rt_uint32_t n)
{
  if (n != 0)
  {
    char *d = dst;
    const char *s = src;
    do
    {
        if ((*d++ = *s++) == 0)
        {
            while (--n != 0)
                *d++ = 0;
            break;
        }
    } while (--n != 0);
  }
  return (dst);
}

/************************************************************
  * @brief   Print button related information
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  * @note    RT_NULL
  ***********************************************************/
static void Print_Btn_Info(Button_t* btn)
{
  
  RT_DEBUG_LOG(RT_DEBUG_THREAD,("button struct information:\n\
              btn->Name:%s \n\
              btn->Button_State:%d \n\
              btn->Button_Trigger_Event:%d \n\
              btn->Button_Trigger_Level:%d \n\
              btn->Button_Last_Level:%d \n\
              ",
              btn->Name,
              btn->Button_State,
              btn->Button_Trigger_Event,
              btn->Button_Trigger_Level,
              btn->Button_Last_Level));
  Search_Button();
}
/************************************************************
  * @brief   Connect buttons with a single linked list
  * @param   RT_NULL
  * @return  RT_NULL
  * @author  jiejie
  * @github  https://github.com/jiejieTop
  * @date    2018-xx-xx
  * @version v1.0
  * @note    RT_NULL
  ***********************************************************/
static void Add_Button(Button_t* btn)
{
  struct button *pass_btn = Head_Button;
  
  while(pass_btn)
  {
    pass_btn = pass_btn->Next;
  }
  
  btn->Next = Head_Button;
  Head_Button = btn;
}

#endif