using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AuroraHeightSensor.Keyence
{
    public partial class HeightSensorLKG85
    {
        private bool ReceiveValue(string strCommand, ref string strReceiveValue)
        {
            string strFullCmd = string.Format("{0}\r", strCommand);
            strReceiveValue = WriteAndReadLine(strFullCmd);
            if (strReceiveValue == null) {
                Log.E("ReceiveValue return value is null");
                return false;
            }

            return CheckError(strCommand, strReceiveValue) == e_HS_ERROR_CODE.ERROR_NO;
        }

        private bool SendCommand(string strCommand)
        {
            string strFullCmd = string.Format("{0}\r", strCommand);
            var strReceiveValue = WriteAndReadLine(strFullCmd);
            if (strReceiveValue == null) {
                Log.E("SendCommand return value is null");
                return false;
            }

            return CheckError(strCommand, strReceiveValue) == e_HS_ERROR_CODE.ERROR_NO;
        }

        private e_HS_ERROR_CODE CheckError(string strCmd, string strReceiveValue)
        {
            if (strReceiveValue.Substring(0, 2) != "ER") {
                // check 1 : not 'ER' => check returned 2 word
                if (strCmd.Substring(0, 2) != strReceiveValue.Substring(0, 2)) {
                    Log.E("Sent code and received code are different");
                    return e_HS_ERROR_CODE.ERROR_DIFFERENT_MAIN_COMMAND;
                }
                return e_HS_ERROR_CODE.ERROR_NO;
            }

            var splitedStr = strReceiveValue.Split(',');
            if (splitedStr.Length < 3) {
                Log.E("Received codes are not 3 string.");
                return e_HS_ERROR_CODE.ERROR_DIFFERENT_RETURN_COUNT;
            }

            string sReceiveMainCommand = splitedStr[1];

            if (sReceiveMainCommand != strCmd.Substring(0, 2)) {
                Log.E("Sent code and received code are different on Error code : " + sReceiveMainCommand);
                return e_HS_ERROR_CODE.ERROR_DIFFERENT_MAIN_COMMAND;
            }

            string sErrorCode = splitedStr[2];
            if (!int.TryParse(sErrorCode, out int iErrorCode)) {
                Log.E("Parse received Error code : " + sErrorCode);
                return e_HS_ERROR_CODE.ERROR_COMMAND;
            }

            // check 3 : case of 'ER'
            e_HS_ERROR_CODE errorCode = (e_HS_ERROR_CODE)iErrorCode;
            Log.E("Return Value Error : " + errorCode.ToString());

            return errorCode;
        }

        private bool CheckRange(int channel, int minChannel, int maxChannel)
        {
            if ((channel >= minChannel) && (channel <= maxChannel)) {
                return true;
            }
            return false;
        }

        // 측정값 (8자리)
        // TODO : -FFFFFFF 와 +FFFFFFF 의 값에 대해서 확인 필요함. 아래 if 와 else if 문
        // BOOL CHeightSensorCom::cmdGetMeasureValue(int iCH,double& dValue) 의 data get
        private bool GetFormatMeasureData(string strValue, ref double doubleValue)
        {
            if (strValue == "-FFFFFFF") {
                doubleValue = 999999.9;
            } else if (strValue == "+FFFFFFF") {
                doubleValue = 999999.9;
            } else {
                if (!double.TryParse(strValue, out doubleValue)) {
                    return false;
                }
            }
            return true;
        }

        private char GetSign(double value)
        {
            return value >= 0 ? '+' : '-';
        }

        private static string GetMeasureDoubleFormat(double measure, int formatLength)
        {
            double absMeasure = Math.Abs(measure);
            string strMeasure = absMeasure.ToString();
            //Console.WriteLine(strMeasure + ", string length : " + strMeasure.Length + ", format length : " + formatLength);

            if (strMeasure.Length == formatLength) { // same format
                return strMeasure;
            }

            string modifyStrMeasure = string.Empty;
            int index = strMeasure.IndexOf(".");
            //Console.WriteLine(strMeasure + ", index of : " + index);
            if (strMeasure.Length > formatLength) {
                if (index < 0) {
                    //Console.WriteLine("없는 경우로 판단, 이럴경우, 자릿수 만큼 F 로 채움");
                    for (int i = 0; i < formatLength; i++) {
                        modifyStrMeasure += "F";
                    }
                } else {
                    if (index > formatLength) {
                        for (int i = 0; i < formatLength; i++) {
                            modifyStrMeasure += "F";
                        }
                    } else if (index == formatLength || (index == formatLength - 1)) {
                        string format = string.Empty;
                        for (int i = 0; i < formatLength; i++) {
                            format += "0";
                        }
                        modifyStrMeasure = (Math.Round(absMeasure, 0)).ToString(format);
                    } else {
                        modifyStrMeasure = (Math.Round(absMeasure, formatLength - 1 - index)).ToString();
                    }
                }
            } else {
                if (index < 0) {
                    string format = string.Empty;
                    for (int i = 0; i < formatLength; i++) {
                        format += "0";
                    }
                    modifyStrMeasure = (Math.Round(absMeasure, 0)).ToString(format);
                } else {
                    for (int i = 0; i < formatLength - strMeasure.Length; i++) {
                        modifyStrMeasure += "0";
                    }
                    modifyStrMeasure += strMeasure;
                }
            }
            return modifyStrMeasure;
        }

    }
}