/*****************************************************************************
* University of Southern Denmark
* Embedded C Programming (ECP)
*
* MODULENAME.: .c
*
* PROJECT....: ECP
*
* DESCRIPTION: See module specification file (.h-file).
*
* Change Log:
******************************************************************************
* Date    Id    Change
* YYMMDD
* --------------------
* 180507  KA    Module created.
*
*****************************************************************************/

/***************************** Include files *******************************/
#include <stdint.h>
#include <ui.h>
#include "tm4c123gh6pm.h"
#include "FreeRTOS.h"
#include "Task.h"
#include "queue.h"
#include "semphr.h"
#include "emp_type.h"
#include "lcd.h"
#include "string.h"
#include "device.h"


/*****************************    Defines    *******************************/
#define O92 0
#define O95 1
#define E10 2

/*****************************   Constants   *******************************/
extern QueueHandle_t keyboard_queue;
extern QueueHandle_t cash_queue;
extern QueueHandle_t gas_queue;
extern SemaphoreHandle_t paid;
extern SemaphoreHandle_t start_signal;
extern SemaphoreHandle_t digi_signal;
/*****************************   Variables   *******************************/

/*****************************   Functions   *******************************/

INT16U calculate_price(INT16U fuel_type, INT16U fuel_count)
{
    INT16U price = 0;

    switch(fuel_type)
    {
    case 1:
        price = fuel_count*1;
        break;
    case 2:
        price = fuel_count*2;
        break;
    case 3:
        price = fuel_count*3;

        break;
    }
    return price;
}

void ui_init(void)
/*****************************************************************************
*   Input    :  -
*   Output   :  -
*   Function :
*****************************************************************************/
{
  INT8S dummy;

  // Enable the GPIO port that is used for the on-board LED.
  SYSCTL_RCGC2_R |= SYSCTL_RCGC2_GPIOD;

  // Do a dummy read to insert a few cycles after enabling the peripheral.
  dummy = SYSCTL_RCGC2_R;
}


void ui_task(void *pvParameters)
{
    INT8U ui_state = WELCOME;
    INT8U keyboard_input;
    INT8U pin_counter = 0;
    INT8U account_counter = 0;
    INT16U fuel_select;
    INT16U cash_balance = 0;
    INT16U fuel_amount = 0;
    INT16U ticks = pdMS_TO_TICKS(20);

    while(1)
    {
        switch(ui_state)
        {
        case WELCOME:
            gfprintf(COM2,"%c%cWelcome!",ESC,'@');
            move_LCD(0, 1);
            gfprintf(COM2, "1.Cash 2.Account");
            if(xQueueReceive(keyboard_queue, &keyboard_input, 100))
            {
                switch(keyboard_input)
                {
                case '1':
                    xSemaphoreGive(digi_signal);
                    ui_state = CASH;
                    gfprintf(COM2, "%c%c%cInsert Cash:", 0xFF, ESC, '@');
                    move_LCD(0,1);
                    gfprintf(COM2, "%04d", cash_balance);
                    move_LCD(0,1);
                    break;
                case '2':
                    ui_state = ACCOUNT;
                    gfprintf(COM2, "%c%c%cEnter Account:", 0xFF, ESC, '@');
                    move_LCD(0,1);
                    break;
                default:
                    break;
                }
            }
            break;
        case CASH:
            if(xQueueReceive(cash_queue, &cash_balance, 10))
            {
                gfprintf(COM2, "%04d", cash_balance);
                move_LCD(0,1);
            }

            if(xSemaphoreTake(paid, 10))
            {

                ui_state = FUEL_SELECT;
                gfprintf(COM2, "%c%c%cSelect Fuel", 0xFF, ESC, '@');
                move_LCD(0,1);
                gfprintf(COM2, "1.92/2.95/3.E10", 0xFF, ESC, '@');
            }
            break;
        case ACCOUNT:
            if(account_counter < 6)
            {
                if(xQueueReceive(keyboard_queue, &keyboard_input, 10))
                {
                    wr_ch_LCD(keyboard_input);
                    account_counter++;
                }
            }
            else
            {
                account_counter = 0;
                wr_ch_LCD(0xFF);
                wr_ch_LCD(0x1B);
                wr_ch_LCD('@');
                ui_state = PIN;
                gfprintf(COM2, "%c%c%cEnter PIN:", 0xFF, ESC, '@');
                move_LCD(0,1);
            }
            break;
        case PIN:
            if(pin_counter < 4)
            {
                if(xQueueReceive(keyboard_queue, &keyboard_input, 10))
                {
                    wr_ch_LCD(keyboard_input);
                    pin_counter++;
                }
            }
            else
            {
                pin_counter = 0;
                gfprintf(COM2, "%c%c%cSelect Fuel", 0xFF, ESC, '@');
                move_LCD(0,1);
                gfprintf(COM2, "1.92/2.95/3.E10");

                ui_state = FUEL_SELECT;
            }
            break;
        case FUEL_SELECT:
            if(xQueueReceive(keyboard_queue, &keyboard_input, 10))
            {
                switch(keyboard_input)
                {
                case '1':
                    fuel_select = O92;
                    ui_state = FUEL;
                    gfprintf(COM2, "%c%c%cP/L:", 0xFF, ESC, '@');
                    move_LCD(0,1);
                    gfprintf(COM2, "L: P:", 0xFF, ESC, '@');
                    break;
                case '2':
                    fuel_select = O95;
                    ui_state = FUEL;
                    gfprintf(COM2, "%c%c%cP/L:", 0xFF, ESC, '@');
                    move_LCD(0,1);
                    gfprintf(COM2, "L: P:");
                    break;
                case '3':
                    fuel_select = E10;
                    ui_state = FUEL;
                    gfprintf(COM2, "%c%c%cP/L:", 0xFF, ESC, '@');
                    move_LCD(0,1);
                    gfprintf(COM2, "L: P:");
                    break;
                default:
                    break;
                }
                xSemaphoreGive(start_signal);
            }
            break;
        case FUEL:
            if(xQueueReceive(gas_queue, &fuel_amount, 10))
            {
                if(!ticks--)
                {
                    move_LCD(0,1);
                    gfprintf(COM2, "L:%d P:%d", fuel_amount, calculate_price(fuel_select, fuel_amount));
                    ticks = pdMS_TO_TICKS(20);
                }
            }
            break;
        default:
            break;
        }
    }
}


/****************************** End Of Module *******************************/