Selector.cs

// =============================================================================
// GPAL - Generally Positive Automation Library
// Copyright © 2026 Software Decisions, Inc. All rights reserved.
//
// This file is part of GPAL.
// Licensed under the Business Source License 1.1
//
// Primary development, architecture, and vision by Michael B. Vederman,
// CEO of Software Decisions, Inc., Texas.
//
// Internal development maintained privately.
// Public releases appear on GitHub: https://github.com/SoftwareDecisionsInc/GPAL.
//
// See LICENSE for full terms, including Additional Use Grant.
// =============================================================================
 
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using OpenQA.Selenium;
using static GenerallyPositive.Enums;
using static GenerallyPositive.Browser.Browser;
using GenerallyPositive.Browser;
using System.Windows.Automation;
using GenerallyPositive.Application;
using System.Reflection;
using static GenerallyPositive.SelectorSettings;
 
/*
    var searchSelector = GPAL.Selector
        .WithCSS(string)    // class
        .WithXpath(string)  // id / name
        .WithText(string)   // value
        .WithImage(string)  // image path or image ptr?
        .WithOffset(coor)   // for clicking x,y coord
        .EvaluationOrder(enum)  // order to try finding object
*/
namespace GenerallyPositive
{
    internal class SmallSelectorNode
    {
        public InteractionType InteractionType { get; internal set; }
        public int OffsetX { get; internal set; }
        public int OffsetY { get; internal set; }
        public int DeltaX { get; internal set; }
        public int DeltaY { get; internal set; }
    }
    public class Selector : IAllowSelectorSettings
    {
        // deep copy cannot have property passed as ref
        internal SelectorSettings selectorSettings = null;
        public SelectorSettings SelectorSettings
        {
            get 
            {
                return selectorSettings;
            }
            internal set
            {
                selectorSettings = value;
            }
        }
 
        public SelectorType SelectorType
        {
            get
            {
                return SelectorSettings.SelectorType;
            }
 
            set
            {
                selectorSettings.SelectorType = value;
            }
        }
        private Application.Application MyApplication { get; set; } = null;
 
        public Selector ToGPALObject()
        {
            return this;
        }

        public delegate CallIfStatus webMatchingFunction(List<IGPALElement> foundElements, out List<IGPALElement> matchedElements, out bool matchedAll, Selector selector, bool ExactMatch = true);

        public delegate CallIfStatus appMatchingFunction(List<GPALAutomationElement> foundElements, out List<GPALAutomationElement> matchedElements, out bool matchedAll, Selector selector, bool ExactMatch = true);
 
 
        internal Selector(Browser.Browser browser, Selector selector)
        {
            SelectorSettings = new SelectorSettings();
 
            Browser = browser;
            selectorSettings = ObjectCopier.DeepCopyObject(selector.SelectorSettings, selectorSettings, DeepCopy.FieldsAndProperties);
            if (true == string.IsNullOrEmpty(selector.Name))
                Name = $"Selector{browser.CurrentUOW.WithSelectorList.Count}";
            else
                Name = selector.Name;   // shoulda been copied?
 
            ElementsFoundAndMatchedCount = 0;
        }
        internal Selector(Browser.Browser browser)
        {
            Browser = browser;
            SelectorSettings = new SelectorSettings();
            Name = $"Selector{browser.CurrentUOW.WithSelectorList.Count}";
        }
 
        internal Selector(Application.Application application, Selector selector)
        {
            SelectorSettings = new SelectorSettings();
 
            MyApplication = application;
            selectorSettings = ObjectCopier.DeepCopyObject(selector.SelectorSettings, selectorSettings, DeepCopy.FieldsAndProperties);
            if (true == string.IsNullOrEmpty(selector.Name))
                Name = $"Selector{application.CurrentUOW.WithSelectorList.Count}";
            else
                Name = selector.Name;   // shoulda been copied?
 
            ElementsFoundAndMatchedCount = 0;
        }
        internal Selector(Application.Application application)
        {
            MyApplication = application;
            SelectorSettings = new SelectorSettings();
            Name = $"Selector{application.CurrentUOW.WithSelectorList.Count}";
        }
        internal Selector()
        {
            SelectorSettings = new SelectorSettings();
        }
        internal bool AnyMatchCriteria()
        {
            return 0 < MatchCriteria.Count;
        }
 
        #region <Fluent Settings>
        public IAllowSelectorSettings WithCSS(string css)
        {
            SelectorSettings.SelectorPathEntry selectorPathEntry = new SelectorSettings.SelectorPathEntry { SelectorPath = css, SelectorPathType = SelectorPathType.Css };
            SelectorSettings.SelectorPaths.Add(selectorPathEntry);
            return this;
        }

        public IAllowSelectorSettings WithXPath(string xPath)
        {
            SelectorSettings.SelectorPathEntry selectorPathEntry = new SelectorSettings.SelectorPathEntry { SelectorPath = xPath, SelectorPathType = SelectorPathType.Xpath };
            SelectorSettings.SelectorPaths.Add(selectorPathEntry);
            return this;
        }

        public IAllowSelectorSettings WithText(string text)
        {
            SelectorSettings.SelectorPathEntry selectorPathEntry = new SelectorSettings.SelectorPathEntry { SelectorPath = text, SelectorPathType = SelectorPathType.Text };
            SelectorSettings.SelectorPaths.Add(selectorPathEntry);
            return this;
        }

        public IAllowSelectorSettings WithValue(string value)
        {
            SelectorSettings.SelectorPathEntry selectorPathEntry = new SelectorSettings.SelectorPathEntry { SelectorPath = value, SelectorPathType = SelectorPathType.Value };
            SelectorSettings.SelectorPaths.Add(selectorPathEntry);
            return this;
        }

        public IAllowSelectorSettings WithName(string name)
        {
            SelectorSettings.SelectorPathEntry selectorPathEntry = new SelectorSettings.SelectorPathEntry { SelectorPath = name, SelectorPathType = SelectorPathType.Name };
            SelectorSettings.SelectorPaths.Add(selectorPathEntry);
            return this;
        }

        public IAllowSelectorSettings WithClassName(string className)
        {
            SelectorSettings.SelectorPathEntry selectorPathEntry = new SelectorSettings.SelectorPathEntry { SelectorPath = className, SelectorPathType = SelectorPathType.ClassName };
            SelectorSettings.SelectorPaths.Add(selectorPathEntry);
            return this;
        }

        public IAllowSelectorSettings WithAutomationID(string automationID)
        {
            SelectorSettings.SelectorPathEntry selectorPathEntry = new SelectorSettings.SelectorPathEntry { SelectorPath = automationID, SelectorPathType = SelectorPathType.AutomationID };
            SelectorSettings.SelectorPaths.Add(selectorPathEntry);
            return this;
        }

        public IAllowSelectorSettings WithImage(string base64String)
        {
            try
            {
                Image image = ImageHelper.Base64ToImage(base64String);
                SelectorSettings.SelectorPathEntry selectorPathEntry = new SelectorSettings.SelectorPathEntry { SelectorPathType = SelectorPathType.Image, Image = image };
                SelectorSettings.SelectorPaths.Add(selectorPathEntry);
            } catch
            {
                // try passing the string as a filename, it's not base64
                return WithImage((GPALFile)base64String);
            }
            return this;
        }

        public IAllowSelectorSettings WithImage(Image image)
        {
            SelectorSettings.SelectorPathEntry selectorPathEntry = new SelectorSettings.SelectorPathEntry { SelectorPathType = SelectorPathType.Image, Image = image };
            SelectorSettings.SelectorPaths.Add(selectorPathEntry);
            return this;
        }

        [SingleUse(Description = "")]
        public IAllowSelectorSettings WithSearchForSelector(bool searchForElement)
        {
            SelectorSettings.SearchForSelector = searchForElement;
            return this;
        }

        [SingleUse(Description = "")]
        public IAllowSelectorSettings WithSelectorName(string name)
        {
            SelectorSettings.Name = name;
            return this;
        }

        [SingleUse(Description = "")]
        public IAllowSelectorSettings WithDeltaX(int deltaX)
        {
            SelectorSettings.DeltaX = deltaX;
            return this;
        }

        [SingleUse(Description = "")]
        public IAllowSelectorSettings WithDeltaY(int deltaY)
        {
            SelectorSettings.DeltaY = deltaY;
            return this;
        }

        [SingleUse(Description = "")]
        public IAllowSelectorSettings WithOffsetX(int offsetX)
        {
            SelectorSettings.OffsetX = offsetX;
            return this;
        }

        [SingleUse(Description = "")]
        public IAllowSelectorSettings WithOffsetY(int offsetY)
        {
            SelectorSettings.OffsetY = offsetY;
            return this;
        }

        [SingleUse(Description = "")]
        public IAllowSelectorSettings WithSimulateMouse(bool moveWithArc)
        {
            SelectorSettings.SimulateMouse = moveWithArc;
            SelectorSettings.InteractionType = InteractionType.Hardware;
            SelectorSettings.RequestedInteractionType = InteractionType.Hardware;
            return this;
        }
        [SingleUse(Description = "")]
        public IAllowSelectorSettings UseAttribute(string attributeName)
        {
            SelectorSettings.AttributeName = attributeName;
            return this;
        }
        public IAllowSelectorSettings MatchFunction(Selector.appMatchingFunction matchingFunction)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Custom, AppMatchingFunction = matchingFunction };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchFunction(Selector.webMatchingFunction matchingFunction)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Custom, WebMatchingFunction = matchingFunction };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchAttribute(string attributeToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Attribute, StringToMatch = attributeToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchAttributeRegex(string attributeToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Regex | MatchType.Attribute, StringToMatch = attributeToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchHRef(string hrefToMatch)   // image path or actual image?
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Href, StringToMatch = hrefToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchHRefRegex(string hrefToMatch)   // image path or actual image?
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Regex | MatchType.Href, StringToMatch = hrefToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchPlaceholder(string placeholderToMatch)   // image path or actual image?
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Placeholder, StringToMatch = placeholderToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchPlaceholderRegex(string placeholderToMatch)   // image path or actual image?
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Regex | MatchType.Placeholder, StringToMatch = placeholderToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchSrc(string srcToMatch) 
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Src, StringToMatch = srcToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchSrcRegex(string srcToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Regex | MatchType.Src, StringToMatch = srcToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchText(string textToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Text, StringToMatch = textToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchTextRegex(string textToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Regex | MatchType.Text, StringToMatch = textToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchValue(string valueToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Value, StringToMatch = valueToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public IAllowSelectorSettings MatchValueRegex(string valueToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Regex | MatchType.Value, StringToMatch = valueToMatch };
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }

        public void Remove()
        {
            DeleteMe = true;
        }

        public IAllowSelectorSettings WithOCR(string textToFind)
        {
            throw new NotImplementedException();
        }

        public IAllowSelectorSettings WithStopOnNotFound(bool stopOnNotFound)
        {
            SelectorSettings.StopOnNotFound = stopOnNotFound;
            return this;
        }
        public IAllowSelectorSettings CallIfFound(CallIfDelegate callIfFound)
        {
            SelectorSettings.CallIfFound.Add(callIfFound);
            return this;
        }
        public IAllowSelectorSettings CallIfNotFound(CallIfDelegate callIfNotFound)
        {
            SelectorSettings.CallIfNotFound.Add(callIfNotFound);
            return this;
        }

        public IAllowSelectorSettings WithImage(GPALFile imageToFindPath)
        {
            foreach (string filename in imageToFindPath.Filenames)
            {
                SelectorSettings.SelectorPathEntry selectorPathEntry = new SelectorSettings.SelectorPathEntry { SelectorPath = filename, SelectorPathType = SelectorPathType.Image };
                SelectorSettings.SelectorPaths.Add(selectorPathEntry);
            }
            return this;
        }
 
        public IAllowSelectorSettings WithHRef(string HRefFullOrPartial)
        {
            selectorSettings.HRef = HRefFullOrPartial;
            return this;
        }
        #endregion <Fluent Settings>
 
        #region <Getter/Setters>
 
        // TECHNIQUES of dealing with Selector
        public IAllowSelectorSettings WithHardware
        {
            get
            {
                SelectorSettings.InteractionType = InteractionType.Hardware;
                SelectorSettings.RequestedInteractionType = InteractionType.Hardware;
                return this;
            }
        }

        public IAllowSelectorSettings WithJavaScript
        {
            get
            {
                SelectorSettings.InteractionType = InteractionType.JavaScript;
                SelectorSettings.RequestedInteractionType = InteractionType.JavaScript;
                return this;
            }
        }
        [Obsolete("This method is not preferred. Consider using WithJavaScript instead.", false)]
        public IAllowSelectorSettings WithJavascript
        {
            get
            {
                SelectorSettings.InteractionType = InteractionType.JavaScript;
                SelectorSettings.RequestedInteractionType = InteractionType.JavaScript;
                return this;
            }
        }
        public IAllowSelectorSettings WithSelenium
        {
            get
            {
                SelectorSettings.InteractionType = InteractionType.Selenium;
                SelectorSettings.RequestedInteractionType = InteractionType.Selenium;
                return this;
            }
        }

        public int ElementsFoundAndMatchedCount
        {
            get
            {
                return SelectorSettings.ElementsFoundAndMatchedCount;
            }
            internal set
            {
                SelectorSettings.ElementsFoundAndMatchedCount = value;
            }
        }
        internal CallIfStatus AppCallIfFoundHandled
        {
            get
            {
                return SelectorSettings.AppCallIfFoundHandled;
            }
            set
            {
                SelectorSettings.AppCallIfFoundHandled = value;
            }
        }
        internal CallIfStatus AppCallIfNotFoundHandled
        {
            get
            {
                return SelectorSettings.AppCallIfNotFoundHandled;
            }
            set
            {
                SelectorSettings.AppCallIfNotFoundHandled = value;
            }
        }
        internal CallIfStatus CallIfFoundHandled
        {
            get
            {
                return SelectorSettings.CallIfFoundHandled;
            }
            set
            {
                SelectorSettings.CallIfFoundHandled = value;
            }
        }
        internal CallIfStatus CallIfNotFoundHandled
        {
            get
            {
                return SelectorSettings.CallIfNotFoundHandled;
            }
            set
            {
                SelectorSettings.CallIfNotFoundHandled = value;
            }
        }
        internal Application.Application Application
        {
            get
            {
                return MyApplication;
            }
            set
            {
                MyApplication = value;
            }
        }
        internal List<Application.Application.CallIfDelegate> AppCallIfFound
        {
            get
            {
                return SelectorSettings.AppCallIfFound;
            }
        }
        internal List<Application.Application.CallIfDelegate> AppCallIfNotFound
        {
            get
            {
                return SelectorSettings.AppCallIfNotFound;
            }
        }
        internal string AttributeName
        {
            get
            {
                return SelectorSettings.AttributeName;
            }
        }
        public InteractionType InteractionType
        {
            get
            {
                return SelectorSettings.InteractionType;
            }
            internal set
            {
                SelectorSettings.InteractionType = value;
            }
        }

        public Browser.Browser Browser
        {
            get;
            internal set;
        }

        public string SelectorPath
        {
            get
            {
                return SelectorSettings.SelectorPaths[0].SelectorPath;
            }
        }

        public List<SelectorSettings.SelectorPathEntry> SelectorPaths
        {
            get
            {
                return SelectorSettings.SelectorPaths;
            }
        }
        internal List<SelectorSettings.MatchCriteriaEntry> MatchCriteria
        {
            get
            {
                return SelectorSettings.MatchCriteria;
            }
        }
        public bool SearchForSelector
        {
            get
            {
                return SelectorSettings.SearchForSelector;
            }
        }

        public int OffsetX
        {
            get
            {
                return SelectorSettings.OffsetX;
            }
            internal set
            {
                SelectorSettings.OffsetX = value;
            }
        }

        public int OffsetY
        {
            get
            {
                return SelectorSettings.OffsetY;
            }
            internal set
            {
                SelectorSettings.OffsetY = value;
            }
        }

        public int DeltaX
        {
            get
            {
                return SelectorSettings.DeltaX;
            }
            internal set
            {
                SelectorSettings.DeltaX = value;
            }
        }

        public int DeltaY
        {
            get
            {
                return SelectorSettings.DeltaY;
            }
            internal set
            {
                SelectorSettings.DeltaY = value;
            }
        }

        public string Name
        {
            get
            {
                return SelectorSettings.Name;
            }
 
            internal  set
            {
                SelectorSettings.Name = value;
            }
        }

        internal bool DeleteMe
        {
            get
            {
                return SelectorSettings.DeleteMe;
            }
            set
            {
                SelectorSettings.DeleteMe = value;
            }
        }
        internal List<Browser.Browser.CallIfDelegate> RemovedMethods
        {
            get
            {
                return SelectorSettings.RemovedMethods;
            }
            set
            {
                SelectorSettings.RemovedMethods = value;
            }
        }
        internal InteractionType? RequestedInteractionType
        {
            get
            {
                return SelectorSettings.RequestedInteractionType;
            }
            set
            {
                SelectorSettings.RequestedInteractionType = value;
            }
        }
        public bool SimulateMouse
        {
            get
            {
                return SelectorSettings.SimulateMouse;
            }
        }

        public bool StopOnNotFound
        {
            get
            {
                return SelectorSettings.StopOnNotFound;
            }
        }
 
        public List<GPALElement> WebSelectorFoundResults
        {
            get
            {
                foreach (var selectorPathEntry in SelectorPaths)
                    if (null != selectorPathEntry.WebSelectorFoundResults)
                        return selectorPathEntry.WebSelectorFoundResults;
 
                return null;
            }
            set
            {
                foreach (var selectorPathEntry in SelectorPaths)
                    selectorPathEntry.WebSelectorFoundResults = value;
            }
        }
        public List<GPALElement> WebSelectorMatchedResults
        {
            get
            {
                foreach (var selectorPathEntry in SelectorPaths)
                    if (null != selectorPathEntry.WebSelectorMatchedResults)
                        return selectorPathEntry.WebSelectorMatchedResults;
 
                return null;
            }
            set
            {
                foreach (var selectorPathEntry in SelectorPaths)
                        selectorPathEntry.WebSelectorMatchedResults = value;
            }
        }
 
        #endregion <Getter/Setters>
 
        #region Implicit String Conversion, so wherever Selector parameter is expected, a string can be used directly
        // implicit ToString
        public static implicit operator string(Selector sel) => sel.Name;
 
        private static int implicitCount = 0;
        // ────────────────────────────────────────────────
        //  1. Implicit conversion from string to Selector
        // ────────────────────────────────────────────────
        public static implicit operator Selector(string selectorString)
        {
            var sel = new Selector();
 
            if (string.IsNullOrWhiteSpace(selectorString))
            {
                // Fail forward: warn + continue with empty/invalid-but-safe selector
                GPAL.PublishSimpleEvent(
                    GPALEventType.WARNING,
                    "Invalid selector path treating as empty selector (no paths added).",
                    selectorString,
                    GPALObjectType.Selector
                );
 
                // Optional: give it a name so it's obvious in logs/reports
                sel.WithSelectorName($"EmptySelector{implicitCount++}");
            }
            else
            {
                bool looksLikeXPath = IsLikelyXPath(selectorString);
 
                if (looksLikeXPath)
                {
                    // XPath first - more specific / less false positives in ambiguous cases
                    sel.WithXPath(selectorString);
                    sel.WithCSS(selectorString);   // still try as CSS as fallback
                }
                else
                {
                    // CSS first - most people intuitively write CSS selectors
                    sel.WithCSS(selectorString);
                    sel.WithXPath(selectorString); // still try as XPath fallback
                }
 
                // give it a recognizable debug name
                sel.WithSelectorName($"Implicit{implicitCount++}.{(looksLikeXPath ? "XPath" : "CSS")}.{Shorten(selectorString, 10)}");
            }
 
            GPAL.PublishSimpleEvent(GPALEventType.DEBUG, $"Implicit selector [{sel.Name}] created for [{selectorString}]");
 
            // emit warning once.
            if (1 == implicitCount)
                GPAL.PublishSimpleEvent(GPALEventType.DEBUG, $"Implicit selector conversions lack equality, even if paths match. Create instance using GPAL.Selector for reuse.", sel, GPALObjectType.Selector);
 
            return sel;
        }
 
        // Very short helper for debug/readable names
        private static string Shorten(string s, int maxLen)
        {
            if (s.Length <= maxLen) return s;
            return s.Substring(0, maxLen - 3) + "...";
        }
 
        // ────────────────────────────────────────────────
        //  2. The helper that guesses CSS vs XPath
        // ────────────────────────────────────────────────
        public static bool IsLikelyXPath(string s)
        {
            if (string.IsNullOrWhiteSpace(s)) return false;
            s = s.Trim();
 
            // Strong XPath starters (absolute, descendant-or-self, id function)
            if (s.StartsWith("/") || s.StartsWith(".//") || s.StartsWith("//") || s.StartsWith("id("))
                return true;
 
            // Classic browser-copied XPath: html/body/div[NN]/... pattern
            if (char.IsLetter(s[0]) && s.Contains("/") && s.Contains("["))
                return true;
 
            // XPath-specific constructs that almost never appear in CSS
            if (s.Contains("::") ||
                s.Contains("/following") ||
                s.Contains("/preceding") ||
                s.Contains("/ancestor") ||
                s.Contains("/parent") ||
                s.Contains("/child") ||
                s.Contains("position()") ||
                s.Contains("last()") ||
                s.Contains("normalize-space") ||
                s.Contains("contains(text()") ||
                (s.Contains("@") && s.Contains("=") && !s.Contains("[")))   // @attr="value" without [
            {
                return true;
            }
 
            // Lone @attr (very strong XPath signal)
            if (s.Contains("@") && !s.Contains("["))
                return true;
 
            // Very strong CSS indicators -> definitely treat as CSS, not XPath
            if (s.StartsWith("#") ||
                s.StartsWith(".") ||
                s.Contains(">") ||
                s.Contains("+") ||
                s.Contains("~") ||
                s.Contains(":not(") ||
                s.Contains(":nth-child") ||
                s.Contains(":nth-of-type"))
            {
                return false;
            }
 
            // Contains [ but no other strong CSS markers -> lean toward XPath
            if (s.Contains("[") && !s.Contains(":") && !s.Contains("#") && !s.Contains("."))
                return true;
 
            // Final fallback - assume CSS unless strong XPath evidence
            return false;
        }
        #endregion
 
        public IAllowSelectorSettings ContainsAttribute(string attributeToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Attribute, StringToMatch = attributeToMatch };
            matchCriteriaEntry.ExactMatch = false;
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }
 
        public IAllowSelectorSettings ContainsHRef(string hrefToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Href, StringToMatch = hrefToMatch };
            matchCriteriaEntry.ExactMatch = false;
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }
 
        public IAllowSelectorSettings ContainsPlaceholder(string placeholderToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Placeholder, StringToMatch = placeholderToMatch };
            matchCriteriaEntry.ExactMatch = false;
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }
 
        public IAllowSelectorSettings ContainsSrc(string srcToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Src, StringToMatch = srcToMatch };
            matchCriteriaEntry.ExactMatch = false;
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }
 
        public IAllowSelectorSettings ContainsText(string textToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Text, StringToMatch = textToMatch };
            matchCriteriaEntry.ExactMatch = false;
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }
 
        public IAllowSelectorSettings ContainsValue(string valueToMatch)
        {
            SelectorSettings.MatchCriteriaEntry matchCriteriaEntry = new SelectorSettings.MatchCriteriaEntry { MatchType = MatchType.Value, StringToMatch = valueToMatch };
            matchCriteriaEntry.ExactMatch = false;
            SelectorSettings.MatchCriteria.Add(matchCriteriaEntry);
            return this;
        }
    }
}