///////////////////////////////////////////////////////
// SaherElm IT Center MQL5 Indicator
// -------------------------------------------
// Name: XADXTD
// Description: ADX TD Channel ...
//
// Maintainer:
// ------------
// Hadi Khazaee Asl (hadi_khazaee_asl@yahoo.com)
//
//////////////////////////////////////////////////////
//
// Global Properties ...
#property copyright "Copyright 2023, SaherElm IT Center"
#property link "https://saherelm.ir"
#property version "1.00"
#property description "SaherElm XADXTD Indicator"
#property strict

//
#define ShortName "XADXTD"

//
// Imports ...
#include "../Libraries/x-saherelm.common.lib.mq5"

//
// Inputs ...
input int length = 21; // Length

//
// BUFFERS ...

//
#property indicator_chart_window

//
#property indicator_buffers 3
#property indicator_plots 0

//
#define strengthBufferIndex 0
double strengthBuffer[];

//
#define bullpBufferIndex 1
double bullpBuffer[];

//
#define bearpBufferIndex 2
double bearpBuffer[];

//
int maxLength = 0;
int mHandler = INVALID_HANDLE;

//
// Event Handlers ...

//
// Initialization ...
int OnInit()
{
    //
    // Validate Inputs ...
    if (!ValidateInputs())
    {
        return INIT_PARAMETERS_INCORRECT;
    }

    //
    // because in some cases we may have more than one input for
    // calculation and we must prevent any calculation
    // untill we pass the biggest input length, here we get max Input length
    // and then wait until pass it ...
    maxLength = ExtractMaxLengthOfInputs();

    //
    // Define Index Buffers ...
    DefineBuffers();

    //
    // Set Indicator ShortName ...
    SetIndicatorName();

    //
    mHandler = iADX(
        _Symbol,
        _Period,
        length //
    );
    if (mHandler == INVALID_HANDLE)
    {
        return INIT_FAILED;
    }

    //
    // Init Succeed ...
    return INIT_SUCCEEDED;
}

//
// DeInitialization ...
void OnDeinit(const int reason)
{
    //
    // REASON_PROGRAM 0 The EA has stopped working calling the ExpertRemove() function
    // REASON_REMOVE 1 Program removed from a chart
    // REASON_RECOMPILE 2 Program recompiled
    // REASON_CHARTCHANGE 3 A symbol or a chart period is changed
    // REASON_CHARTCLOSE 4 Chart closed
    // REASON_PARAMETERS 5 Inputs changed by a user
    // REASON_ACCOUNT 6 Another account has been activated or reconnection to the trade server has occurred due to changes in the account settings
    // REASON_TEMPLATE 7 Another chart template applied
    // REASON_INITFAILED 8 The OnInit() handler returned a non-zero value
    // REASON_CLOSE 9 Terminal closed

    //
    IndicatorRelease(mHandler);
}

//
// Calculating what we want ...
int OnCalculate(
    const int rates_total,     // Total Bars on Chart ...
    const int prev_calculated, // Total Calculated Bars on Charts ...
    const datetime &time[],    // History of Open Time ...
    const double &open[],      // History of Open Price ...
    const double &high[],      // History of High Price ...
    const double &low[],       // History of Low Price ...
    const double &close[],     // History of Close Price ...
    const long &tick_volume[], // History of Tick Volumes on Bar ...
    const long &volume[],      // History of Trade Volumes ...
    const int &spread[]        // History of Spread Price ...
)
{
    //
    // this counts Available Bars ...
    int limit;

    //
    // Check Calculated Bars ...
    int adxCalculatedBars = BarsCalculated(mHandler);
    if (adxCalculatedBars < maxLength)
    {
        return prev_calculated;
    }

    //
    limit = (prev_calculated > rates_total || prev_calculated <= 0) ? rates_total : (rates_total - prev_calculated) + 1;

    //
    // Buffers Copy ...
    int copiedADXStrength = CopyBuffer(mHandler, MAIN_LINE, 0, limit, strengthBuffer);
    int copiedADXBullp = CopyBuffer(mHandler, PLUSDI_LINE, 0, limit, bullpBuffer);
    int copiedADXBearP = CopyBuffer(mHandler, MINUSDI_LINE, 0, limit, bearpBuffer);
    if (copiedADXBullp <= 0 ||
        copiedADXBearP <= 0 ||
        copiedADXStrength <= 0)
    {
        return prev_calculated;
    }

    //
    return rates_total;
}

//
// Functions ...

//
// Validate Input Args for Initialization ...
bool ValidateInputs()
{
    //
    bool result =
        //
        (length > 0)
        //
        ;

    //
    return result;
}

//
// Retrieve all Exists Input Max Length ...
// use for Start Of Drawing ...
int ExtractMaxLengthOfInputs()
{
    //
    int result = 0;

    //
    result = MathMax(result, length);

    //
    return result;
}

//
// Set Indicator Short Name and also we can define Buffers Labels ...
void SetIndicatorName()
{
    IndicatorSetString(INDICATOR_SHORTNAME, ShortName);
}

//
// Define Indexes and Styles ...
void DefineBuffers()
{
    //
    ArraySetAsSeries(strengthBuffer, true);
    SetIndexBuffer(strengthBufferIndex, strengthBuffer, INDICATOR_CALCULATIONS);

    //
    ArraySetAsSeries(bullpBuffer, true);
    SetIndexBuffer(bullpBufferIndex, bullpBuffer, INDICATOR_CALCULATIONS);

    //
    ArraySetAsSeries(bearpBuffer, true);
    SetIndexBuffer(bearpBufferIndex, bearpBuffer, INDICATOR_CALCULATIONS);
}