using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using Xylem.Common.Hardware.WaterMeter.WaterMeterCore.Consts;
using Xylem.Common.Metrology.Measurements;
using Xylem.Common.Metrology.Measurements.Consts;

namespace Xylem.Common.Hardware.WaterMeter.WaterMeterCore
{

    /// <inheritdoc />
    /// <summary>
    ///     IMeter is the highest level interface between a meter with direct communication to a test bench.
    ///     has general things like calibration, measurement and set up routines.
    ///     no specific meter stuff in here!
    ///     it is always disposable
    /// </summary>
    [Guid("7BD20046-DF8C-44A6-8F6B-687FAA26FA71")
    , ComVisible(true)
    , InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]

    public interface IMeter : IDisposable
    {
        #region  events

        /// <summary>
        ///     occurs when ProcessState has changed
        /// </summary>
        event EventHandler OnProcessStatusChanged;

        /// <summary>
        ///     occurs when ErrorState has changed
        /// </summary>
        event EventHandler OnErrorStatusChanged;

        /// <summary>
        ///     occurs when Init is completed
        /// </summary>
        event EventHandler OnInitCompleted;

        /// <summary>
        ///     occurs when the initialization for Measurement is completed
        /// </summary>
        event EventHandler OnMeasurementInitCompleted;

        /// <summary>
        ///     occurs when the Measurement is completed
        /// </summary>
        event EventHandler OnMeasurementCompleted;

        /// <summary>
        ///     occurs when the initialization for calibration is completed
        /// </summary>
        event EventHandler OnCalibInitCompleted;

        /// <summary>
        ///     occurs when the calibration is completed
        /// </summary>
        event EventHandler OnCalibCompleted;

        /// <summary>
        ///    occurs when meter gets disposed
        /// </summary>
        event EventHandler OnDisposeCompleted;
        #endregion

        #region properties
        /// <summary>
        ///     unique meter identification
        /// </summary>
        String SerialNumber { get; set; }

        /// <summary>
        ///     read-only to see current Process state <see cref="ProcessState" />
        /// </summary>
        ProcessState ProcessStatus { get; }

        /// <summary>
        ///  the current slot in test-bench
        /// </summary>
        Int32 Slot { get; set; }

        /// <summary>
        ///     Setup of intermediate update time for measurement updates and overflow detections,
        ///     has to be calculated depending on flow-rate and nominal diameter (DN)
        /// </summary>
        Int32 IntermediateUpdateTimeS { get; set; }
        /// <summary>
        /// Skip the test bench preparation  process
        /// </summary>
        Boolean SkipPreparationForTestBench { get; set; }
        /// <summary>
        /// Set the current action test
        /// </summary>
        String CurrentActionText { get; set; }
        #endregion

        #region method

        /// <summary>
        /// Read the PcbId from IMeter, if device has no readable PcbId simulate one
        /// </summary>
        /// <returns></returns>
        String GetPcbId();
        
        /// <summary>
        ///     Open Com ports, try some communication, login
        /// </summary>
        void ConnectMeter();

        /// <summary>
        /// Setup up meter from config file. just a workaround for vb6 calls. please do not use if your working with .net
        /// </summary>
        /// <param name="slot">Slot Number for Test bench</param>
        /// <param name="ignoreCorruptedData">don´t send CRC error or telegrams with error flag to caller</param>
        /// <param name="useRequest"></param>
        /// <param name="useStreaming"></param>
        void SetupFromConfigFile(Int32 slot, Boolean ignoreCorruptedData = true, Boolean useRequest = true, Boolean useStreaming = true);



        /// <summary>
        /// Logout from device
        /// </summary>
        Boolean Logout();

        /// <summary>
        /// Start Login with password service
        /// </summary>
        Boolean Login();

        /// <summary>
        /// Start Login without password service and a fixed password
        /// </summary>
        /// <param name="password">password for login</param>
        /// <param name="runImmediately">execute immediately</param>
        /// <param name="skipReadMeterFwAndAssignRegisters">skip app readout and register generation to speed up
        /// the initial connection process</param>
        Boolean Login(String password, Boolean runImmediately = true, Boolean skipReadMeterFwAndAssignRegisters = false);

        /// <summary>
        ///     set up measurement parameter and set meter into test-mode
        /// </summary>
        void InitMeasurement();

        /// <summary>
        ///     Starting a Measurement
        ///     Meter must be initialized <see cref="InitMeasurement" />
        ///     Start to receive record from meter and decode this record into <code>MeasurementRecord</code>
        ///     <see cref="IMeasurementRecord" />
        /// </summary>
        [ComVisible(false)]
        void StartMeasurement();

        /// <summary>
        ///     Meter must have a active measurement <see cref="StartMeasurement" />
        ///     Stop receive record from meter and decode record
        /// </summary>
        void StopMeasurement();

        /// <remarks date="2018JAN09" author="drabesch">
        /// - simplify the measurement results handling
        /// - getting the main measurement of the entire device (combination of all paths)
        /// - add MeasurementResult
        /// - remove all other methods
        /// </remarks>
        /// <summary>
        /// After a completed measurement , you can grab <see cref="MeasurementResults"/>
        /// </summary>
        /// <returns>Calculated results</returns>
        MeasurementResults GetMainMeasurementResult(Double? refVolume, Double? refTimeS, Boolean intermediateMeasurement = false, MeasurementDirection dir = MeasurementDirection.TakeBoth);


        /// <summary>
        ///     The first measurement is ALWAYS a FlowTestRecord.
        /// </summary>
        List<MeasurementResults> GetAllMeasurementResults(Double? refVolume, Double? refTimeS,
            Boolean intermediateMeasurement = false, Int32? channel = null, MeasurementDirection dir = MeasurementDirection.TakeBoth);



        /// <summary>
        ///     get current state of the running measurement
        /// </summary>
        /// <param name="onlyChannelNr">leave empty for an aggregate state for all measurements or pass the channel number to check</param>
        /// <returns></returns>
        MeasurementStates GetMeasurementState(Int32? onlyChannelNr = null );

        /// <summary>
        ///     Request for intermediate measurement state.
        /// </summary>
        /// <param name="onlyChannelNr"></param>
        /// <returns></returns>
        Boolean RequestIntermediateMeasurementState(Int32? onlyChannelNr = null);

        /// <summary>
        ///     set up calibration parameter (calibration factor to default) and set meter into calibration mode
        /// </summary>
        void InitCalibration();

        /// <summary>
        ///     Starting a Calibration
        ///     Meter must be initialized <see cref="InitCalibration" />
        ///     Start to receive record from meter, decode and store this record
        ///     no <see cref="IMeasurementRecord" /> available
        ///     To finish calibration process run <see cref="StopCalibration" />
        /// </summary>
        [ComVisible(false)]
        void StartCalibration();

        /// <summary>
        ///     Meter must have an active Stop Record for calibration 
        /// </summary>
        void StopCalibration();

        /// <summary>
        ///     Get current state of the running calibration
        /// </summary>
        /// <returns></returns>
        MeasurementStates GetCalibrationState();

        /// <summary>
        ///     Calculate calibration factor for static and flying start / stop
        ///     Results kept internal and not being saved to meter.
        ///     if you want to store them on meter use <see cref="SetCalibFactorsAllChannels" />
        /// </summary>
        /// <param name="refVolumeCm">the reference volume is essential for calculation of calibration factor</param>
        /// <param name="refTimeS">the reference time is needed for flying start/stop</param>
        /// <param name="reqDeviationPercent">the required deviation to set the scale apart from 0</param>
        /// <param name="maxCalibFactorTolerancePercent"> override the default max calibration factor tolerance</param>
        void BuildAndCheckCalibFactorsAllChannels(Double refVolumeCm, Double? refTimeS = null, Double reqDeviationPercent = 0.0, Double maxCalibFactorTolerancePercent = 0.0);

        /// <summary>
        ///     Save calculated calibration on meter if no calibration results available an exception occurred
        /// </summary>
        void SetCalibFactorsAllChannels(Boolean justLog = false);

        /// <summary>
        /// To control the LCD from meter for status information etc.
        /// </summary>
        /// <param name="release">if set to true the meter will show his normal screen, if set to false the next parameter will shown in display</param>
        /// <param name="textInHex">test shown in LCD in byte array as hex value (0x33,0xFF shows 33FF on screen)</param>
        void SetLcdText(Boolean release, Byte[] textInHex);


        /// <summary>
        /// Sets Display text and update production database
        /// </summary>
        /// <param name="newState">New ProductionState</param>
        /// <param name="webRequest">web logging required per default true, for offline usage set to false</param>
        void SetProcessState(DisplayCodes newState, Boolean webRequest = true);

        /// <summary>
        /// Get last Process State
        /// </summary>
        DisplayCodes GetLastProcessState();

        /// <summary>
        /// Add external text to internal log file handling
        /// </summary>
        /// <param name="text">text to log</param>
        void WriteLog(String text);
        
        /// <summary>
        /// Enable/Disable Raw record Logging
        /// </summary>
        /// <param name="on">True = Write Raw record into log/ false = Stop write raw record into log </param>
        void LogRawData(Boolean on);

        /// <summary>
        /// Check if the meter has any errors that can occur on a measurement
        /// the error reason has find out in the log files
        /// </summary>
        /// <returns>false = everything is good, detect at least one error</returns>
        Boolean CheckStateAfterMeasurement();

        #endregion

        /// <summary>
        /// Clear all object set up on runtime
        ///  </summary>
        void DisposeMeter();

        /// <summary>
        /// Dispose the entire test bench
        /// </summary>
        void TestBenchDispose();
    }
}