using Sarand.Net.Standard.Base.App;
using Sarand.Net.Standard.Base.IO;
using Sarand.Net.Standard.Base.Utils;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Sarand.Net.Standard.Base.Core
{
	//=======================================================================
	public class Property
	{
		//-------------------------------------------------------------------
		// Data members.
		private String section = "", name = "", value = "";
		//-------------------------------------------------------------------
		// Construction.
		public Property (String section, String name, String value)
		{
			this.section = section;
			this.name = name;
			this.value = value;
		}
		//-------------------------------------------------------------------
		// Comparison.
		public bool Matches (String section, String name)
		{
			return (StringUtil.EqualsCI(this.section, section) && StringUtil.EqualsCI(this.name, name));
		}
		//-------------------------------------------------------------------
		// Attributes.
		public String GetSection ()
		{
			return section;
		}
		public String GetName ()
		{
			return name;
		}
		public String GetValue ()
		{
			return value;
		}
		//-------------------------------------------------------------------
	}
	//=======================================================================
	public class PropertySet
	{
		//-------------------------------------------------------------------
		// Data members.
		private List<Property> properties = new List<Property>();
		//-------------------------------------------------------------------
		// Construction.
		public PropertySet ()
		{
		}
		//-------------------------------------------------------------------
		/// <summary>
		/// Add property to set.
		/// </summary>
		public void AddProperty (String section, String name, String value)
		{
			properties.Add(new Property(section, name, value));
		}
		//-------------------------------------------------------------------
		/// <summary>
		/// Retrieve value from property set.
		/// </summary>
		public String GetPropertyValue (String section, String name)
		{
			foreach (var property in properties)
			{
				if (property.Matches(section, name))
					return property.GetValue();
			}
			return "";
		}
		//-------------------------------------------------------------------
		// Retrieve peoperties from file.
		public static PropertySet GetPropertiesFromFile (String filepath)
		{
			if (StringUtil.IsEmpty(filepath))
			{
				SaLogger.Warn("PropertySet.GetPropertiesFromFile Blank file path specified");
				return null;
			}
			if (!FileUtil.IsFile(filepath))
			{
				SaLogger.Warn("PropertySet.GetPropertiesFromFile Invalid file specified: '" + filepath + "'");
				return null;
			}
			PropertySet propertySet = new PropertySet();
			String section = "";
			foreach (var row in FileUtil.ReadAllFileLines(filepath))
			{
				String data = row.Trim();
				// Blank lines:
				if (String.IsNullOrEmpty(data))
					continue;
				// Check for comment:
				else if (data.Left(1) == ";" || data.Left(2) == "//")
					continue;
				// Check for [Section]:
				else if (data[0] == '[')
				{
					section = data.Substring(1).Split(']')[0];
				}
				else
				{
					// Otherwise it is a named value:
					propertySet.AddProperty(section, data.Split('=')[0], string.Join("=", data.Split('=').Skip(1).ToArray()));
				}
			}

			return propertySet;
		}
		//-------------------------------------------------------------------
		// Utilities.
		public void Dump ()
		{
			System.Diagnostics.Debug.WriteLine("PropertySet dump:");
			foreach (var property in properties)
			{
				string info = property.GetSection();
				if (!String.IsNullOrEmpty(info)) info += ".";
				info += property.GetName() + "=" + property.GetValue();
				System.Diagnostics.Debug.WriteLine("\t" + info);
			}
		}
		//-------------------------------------------------------------------
	}
	//=======================================================================
}