package no.topi.fiken.display;

import android.util.Log;

import static no.topi.fiken.display.DefaultDisplayService.toHexString;

public class FikenStatusPanel {
    private final static String TAG = DefaultDisplayService.class.getSimpleName();

    public static final byte
            FSP_CMD_GET_GAUGE_COUNT = (byte) 0x01,
            FSP_CMD_SET_GAUGE = (byte) 0x02,
            FSP_CMD_GET_GAUGE = (byte) 0x03,
            FSP_CMD_FAIL = (byte) 0xff;

    private Integer[] gauges;

    public int gaugeCount() {
        return gauges != null ? gauges.length : 0;
    }

    public Integer get(int gauge) {
        return gauges[gauge];
    }

    public void update(byte[] data) {
        Log.d(TAG, "data=" + toHexString(data));
        byte len = data[0];
        byte code = data[1];

        switch (code) {
            case FSP_CMD_GET_GAUGE_COUNT:
                byte count = data[2];
                gauges = new Integer[count];
                Log.d(TAG, "Gauge count=" + count);
                break;
            case FSP_CMD_GET_GAUGE:
                byte gauge = data[2];
                byte value = data[3];
                Log.d(TAG, "Gauge #" + gauge + ", value=" + value);
                if (gauge < gauges.length) {
                    gauges[gauge] = 0xff & value;
                }
                break;
            case FSP_CMD_FAIL:
                Log.e(TAG, "FSP_CMD_FAIL");
                break;
            case FSP_CMD_SET_GAUGE:
                // ignored
                break;
            default:
                Log.w(TAG, "Unknown code: " + code);
                break;
        }
    }

    public static byte[] getGaugeCountReq() {
        return new byte[]{FSP_CMD_GET_GAUGE_COUNT};
    }

    public static byte[] getGaugeValueReq(byte gauge) {
        return new byte[]{FSP_CMD_GET_GAUGE, gauge};
    }

    public static byte[] setGaugeValueReq(byte gauge, byte value) {
        return new byte[]{FSP_CMD_SET_GAUGE, gauge, value};
    }
}