// ClassicalSharp copyright 2014-2016 UnknownShadow200 | Licensed under MIT
using System;

namespace ClassicalSharp.Gui {
	
	public abstract class MenuInputValidator {
		
		public string Range;
		
		public abstract bool IsValidChar( char c );
		
		public abstract bool IsValidString( string s );
		
		public virtual bool IsValidValue( string s ) {
			return IsValidString( s );
		}
		
		protected void MakeRange( string min, string max ) {
			Range = "&7(" + min + " - " + max + ")";
		}
	}
	
	public sealed class HexColourValidator : MenuInputValidator {
		
		public HexColourValidator() {
			Range = "&7(#000000 - #FFFFFF)";
		}
		
		public override bool IsValidChar( char c ) {
			return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'F')
				|| (c >= 'a' && c <= 'f');
		}
		
		public override bool IsValidString( string s ) {
			return s.Length <= 6;
		}
		
		public override bool IsValidValue( string s ) {
			FastColour col;
			return FastColour.TryParse( s, out col );
		}
	}
	
	public class IntegerValidator : MenuInputValidator {
		
		int min, max;
		public IntegerValidator( int min, int max ) {
			this.min = min;
			this.max = max;
			SetRange();
		}
		
		protected virtual void SetRange() {
			MakeRange( min.ToString(), max.ToString() );
		}
		
		public override bool IsValidChar( char c ) {
			return (c >= '0' && c <= '9') || c == '-';
		}
		
		public override bool IsValidString( string s ) {
			int value;
			if( s.Length == 1 && s[0] == '-' ) return true;
			return Int32.TryParse( s, out value );
		}
		
		public override bool IsValidValue( string s ) {
			int value;
			if( !Int32.TryParse( s, out value ) ) return false;
			return min <= value && value <= max;
		}
	}
	
	public sealed class SeedValidator : IntegerValidator {
		
		public SeedValidator() : base( int.MinValue, int.MaxValue ) { }
		
		protected override void SetRange() {
			Range = "&7(an integer)";
		}
	}
	
	public sealed class RealValidator : MenuInputValidator {
		
		float min, max;
		public RealValidator( float min, float max ) {
			this.min = min;
			this.max = max;
			MakeRange( min.ToString(), max.ToString() );
		}
		
		public override bool IsValidChar( char c ) {
			return (c >= '0' && c <= '9') || c == '-' || c == '.' || c == ',';
		}
		
		public override bool IsValidString( string s ) {
			float value;
			if( s.Length == 1 && IsValidChar( s[0] ) ) return true;
			return Single.TryParse( s, out value );
		}
		
		public override bool IsValidValue( string s ) {
			float value;
			if( !Single.TryParse( s, out value ) ) return false;
			return min <= value && value <= max;
		}
	}
	
	public sealed class PathValidator : MenuInputValidator {
		
		public PathValidator() {
			Range = "&7(Enter name)";
		}
		
		public override bool IsValidChar( char c ) {
			return !(c == '/' || c == '\\' || c == '?' || c == '*' || c == ':'
			         || c == '<' || c == '>' || c == '|' || c == '"');
		}
		
		public override bool IsValidString( string s ) { return true; }
	}
	
	public sealed class BooleanValidator : MenuInputValidator {
		
		public BooleanValidator() {
			Range = "&7(yes or no)";
		}
		
		public override bool IsValidChar( char c ) { return true; }
		
		public override bool IsValidString( string s ) { return true; }
		
		public override bool IsValidValue( string s ) { return true; }
	}
	
	public sealed class EnumValidator : MenuInputValidator {
		
		public Type EnumType;
		public EnumValidator( Type type ) {
			EnumType = type;
		}
		
		public override bool IsValidChar( char c ) { return true; }
		
		public override bool IsValidString( string s ) { return true; }
		
		public override bool IsValidValue( string s ) { return true; }
	}
	
	public sealed class StringValidator : MenuInputValidator {
		
		int maxLen;
		public StringValidator( int len ) {
			Range = "&7(Enter text)";
			maxLen = len;
		}
		
		public override bool IsValidChar( char c ) {
			return !(c < ' ' || c == '&' || c > '~');
		}
		
		public override bool IsValidString( string s ) {
			return s.Length <= maxLen;
		}
	}
}