#include "ti/driverlib/dl_wwdt.h"
#include "ti/driverlib/m0p/dl_core.h"
#include "ti_msp_dl_config.h"
#include "src/pi/i2c_pi_target.h"
#include "src/controller/controller.h"
#include "ti/driverlib/dl_i2c.h"
#include "src/battery_data/battery.h"
#include "src/cc_cv_charging.h"
#include <stdio.h>
#include "src/battery_data/battery.h"
#include "mock_setup.h"


//define the varibales:
volatile bool mcuSendCommand = false;
volatile bool picommandPending = false;
volatile bool watchdog_triggered= false;

// Interrupt for I2C instance -> MCU to Target

void I2C_1_INST_IRQHandler(void)
{
    switch (DL_I2C_getPendingInterrupt(I2C_1_INST)) 
    {   
        case DL_I2C_IIDX_CONTROLLER_START:
            DL_I2C_flushControllerRXFIFO(I2C_1_INST);
            DL_I2C_flushControllerTXFIFO(I2C_1_INST);
            break;

        case DL_I2C_IIDX_CONTROLLER_RXFIFO_TRIGGER:
            if (DL_I2C_isTargetRXFIFOEmpty(I2C_1_INST)) {
                return;
            }
            mcuSendCommand= true;
            break;

        case DL_I2C_IIDX_CONTROLLER_TXFIFO_TRIGGER:
            /* Fill TX FIFO with bytes to send */
            mcuSendCommand = true;
            
            break;
        case DL_I2C_IIDX_CONTROLLER_STOP:
            mcuSendCommand = true;
        case DL_I2C_IIDX_CONTROLLER_ARBITRATION_LOST:
        case DL_I2C_IIDX_CONTROLLER_NACK:
            break; 
        default:
            break;
    }
}


void I2C_0_INST_IRQHandler(void)
{
    switch (DL_I2C_getPendingInterrupt(I2C_0_INST)) 
    {   
        case DL_I2C_IIDX_TARGET_START:
            DL_I2C_flushTargetTXFIFO(I2C_0_INST);
            break;

        case DL_I2C_IIDX_TARGET_RXFIFO_TRIGGER:
            if (DL_I2C_isTargetRXFIFOEmpty(I2C_0_INST)) {
                return;
            }
            picommandPending = true;
            break;

        case DL_I2C_IIDX_TARGET_TXFIFO_TRIGGER:
            /* Fill TX FIFO with bytes to send */
            picommandPending = true;
            break;
        case DL_I2C_IIDX_TARGET_STOP:
            picommandPending = true;
            //DL_I2C_flushTargetTXFIFO(I2C_0_INST);
            //DL_I2C_flushTargetRXFIFO(I2C_0_INST);
            break;
        case DL_I2C_IIDX_TARGET_ARBITRATION_LOST:
            break; 
        default:
            break;
    }
}

//interrupt added for Windows Watchdog Timer:
void GROUP0_IRQHandler(void)
{
    switch (DL_Interrupt_getPendingGroup(DL_INTERRUPT_GROUP_0)) {
        case DL_INTERRUPT_GROUP0_IIDX_WWDT0:
            if (DL_WWDT_getPendingInterrupt(WWDT0)) {
                //Clears the interrupt
                DL_WWDT_clearInterruptStatus(WWDT0);
                //Resets the timer:
                DL_WWDT_reset(WWDT0);
                //Set the flag to True
                watchdog_triggered= true;
                //how to handle in the case of failure?
            }
        default:
            break;
    }
}

int main(void)
{  
    SYSCFG_DL_init();
    Battery_Init();
    //dynamic addressing function call for Pi
    dynamic_gpio_addressing();
    /* Enable WWDT interrupts on device */
    NVIC_EnableIRQ(WWDT0_INT_IRQN);
    //Interrupt routine for Pi
    NVIC_EnableIRQ(I2C_0_INST_INT_IRQN);
    //Interrupt for target mcu
    NVIC_EnableIRQ(I2C_1_INST_INT_IRQN);
    //DL_GPIO_setPins(GPIO_Battery_Discharging_PORT, GPIO_Battery_Discharging_PIN_PB7_PIN);
    while(1)
    {   
        if(watchdog_triggered){
            printf("ERROR: ***WATCHDOG TRIGGERED***\n");
            //Resetting the flags to its original state
            picommandPending= false;
            mcuSendCommand= false;
            watchdog_triggered= false;
            //Reinitialize the system
            


        }

        if(picommandPending)
        {   printf("Pi Interrupt Triggered.\n");
            pi_i2c_mcu();
            picommandPending = false;
        }
        if(mcuSendCommand){   
            printf("MCU Interrupt Triggered.\n");
            for(uint8_t i=0; i<NUM_SLOTS; i++){
                controller_GetBatteryMeasurement(TARGET_BASE_ADDRESS, i);
            }
            mcuSendCommand = false;
            
        }
        
        for(uint8_t slot_id= 0; slot_id< NUM_SLOTS; slot_id++){
            //Reading battery state:
            Battery_ReadState(slot_id);
            printf("STATUS ***Reading Battery Measurement for Slot ID %u:: Battery State: %u, Voltage: %u, Current: %u, Temperature: %u, Slot state: %u***\n", slot_id, battery_data[slot_id].battery_state, battery_data[slot_id].battery_measurement.voltage,
            battery_data[slot_id].battery_measurement.current, battery_data[slot_id].battery_measurement.temperature, battery_data[slot_id].battery_measurement.slot_state);
            //If target received battery limits from Pi then start charging:       
            if(battery_data[slot_id].batteryLimitReceived){
                printf("STATUS ***Battery Limits: Slot: %d, Max Voltage:%u, Min Voltage:%u, "
                "Cutoff Current: %u, Capacitance:%u, Charge Fraction:%u***\n", slot_id, battery_data[slot_id].max_voltage,
                battery_data[slot_id].min_voltage, battery_data[slot_id].cut_off_current,
                battery_data[slot_id].capacitance, battery_data[slot_id].charge_fraction);
                CC_CV_ControlCharging(slot_id, 50);
            }
     
            delay_cycles(MEASUREMENT_CHECK_INTERVAL);
        
        }
        
    }
}