package SBC;

import lombok.Getter;

@SuppressWarnings("unused")
public class PCF8574 extends I2C_Device{

    private byte data = 0x00;
    private final @Getter String[] pinNames = new String[8];

    /**
     * Create new PCF8574
     * @param bus_number I2C Bus Number
     * @param address PCF8574 Address
     */
    public PCF8574(int bus_number, int address){
        super(bus_number, address);
        for(int i=0; i<8; i++){
            pinNames[i] = i+"";
        }
    }

    /**
     * Set new Pin Name
     * @param pin pin number, 0-7
     * @param name new name
     */
    public void setPinName(int pin, String name){
        if (pin<0 || pin>7) return;
        pinNames[pin] = name;
    }

    /**
     * Get Pin Name
     * @param pin pin number, 0-7
     * @return pin name, or null if not available
     */
    public String getPinName(int pin){
        if (pin<0 || pin>7) return null;
        return pinNames[pin];
    }

    /**
     * Set All Pins High
     * @return true if successful
     */
    public boolean AllOn(){
        if (super.isOpened()){
            if (super.WriteBytes(new byte[]{(byte)0xFF})>0){
                data = (byte)0xFF;
                return true;
            }
        }
        return false;
    }

    /**
     * Set all Pins Low
     * @return true if successful
     */
    public boolean AllOff(){
        if (super.isOpened()){
            if (super.WriteBytes(new byte[]{(byte)0x00})>0){
                data = (byte)0x00;
                return true;
            }
        }
       return false;
    }

    /**
     * Set Pin by Pin Name
     * @param pinName pin name
     * @return true if successful
     */
    public boolean SetPin(String pinName){
        for(int i=0; i<8; i++){
            if (pinNames[i].equals(pinName)){
                return SetPin(i);
            }
        }
        return false;
    }



    /**
     * Set Pin High
     * @param pin pin number 0-7
     * @return true if successful
     */
    public boolean SetPin(int pin){
        if (pin<0 || pin>7) return false;
        if (super.isOpened()){
            byte temp = (byte) (data | (1<<pin));
            return super.WriteBytes(new byte[]{temp})>0;
        }
        return false;
    }

    /**
     * Clear Pin by Pin Name
     * @param pinName pin name
     * @return true if successful
     */
    public boolean ClearPin(String pinName){
        for(int i=0; i<8; i++){
            if (pinNames[i].equals(pinName)){
                return ClearPin(i);
            }
        }
        return false;
    }

    /**
     * Set Pin Low
     * @param pin pin number 0-7
     * @return true if successful
     */
    public boolean ClearPin(int pin){
        if (pin<0 || pin>7) return false;
        if (super.isOpened()){
            byte temp = (byte) (data & ~(1<<pin));
            return super.WriteBytes(new byte[]{temp})>0;
        }
        return false;
    }


    /**
     * Read Pin by Pin Name
     * @param pinName pin name
     * @return 1 if high, 0 if low, -1 if error
     */
    public int ReadPin(String pinName){
        for(int i=0; i<8; i++){
            if (pinNames[i].equals(pinName)){
                return ReadPin(i);
            }
        }
        return -1;
    }


    /**
     * Read Pin
     * @param pin pin to read, 0 - 7
     * @return 1 if high, 0 if low, -1 if error
     */
    public int ReadPin(int pin){
        if (pin<0 || pin>7) return -1;
        if (super.isOpened()){
            byte[] buffer = super.ReadBytes(1);
            byte masker = (byte) (1<<pin);
            return (buffer[0] & masker) > 0 ? 1 : 0;
        }
        return -1;
    }
}