package org.matheclipse.core.basic;

import java.util.HashSet;
import java.util.Set;

import org.apache.commons.math3.util.Precision;
import org.matheclipse.core.interfaces.ISymbol;

/**
 * 
 */
public class Config {
	/**
	 * COMPILER switch - set this boolean variable to true, if you would force a direct plot frame creation from the
	 * Plot[], Plot3D[] and ParametricPlot[] functions
	 * 
	 * On the server this switch should be set to false
	 */
	public static boolean SWING_PLOT_FRAME = false;

	/**
	 * The time in milliseconds an evaluation thread should run.

	 * 0 => forever
	 * 
	 */
	public static long TIME_CONSTRAINED_MILLISECONDS = 60000L;

	/**
	 * The time in milliseconds an evaluation thread should run.

	 * 0 => forever
	 * 
	 */
	public final static long FOREVER = 0L;

	/**
	 * The time in milliseconds an evaluation thread should sleep until Thread#stop() will be called.
	 * 
	 */
	public final static long TIME_CONSTRAINED_SLEEP_MILLISECONDS = 500;

	/**
	 * Switch debug mode on/off
	 * 
	 */
	public final static boolean DEBUG = false;

	/**
	 * Show the stack trace, if an exception is thrown in evaluation
	 * 
	 */
	public final static boolean SHOW_STACKTRACE = true;

	/**
	 * Show the console output, if an expression has a head symbol with attribute ISymbol.CONSOLE_OUTPUT.
	 * 
	 */
	public final static boolean SHOW_CONSOLE = true;

	/**
	 * Show the pattern-matching evaluation steps in the console output.
	 * 
	 */
	public final static boolean SHOW_PATTERN_EVAL_STEPS = false;

	public final static Set SHOW_PATTERN_SYMBOL_STEPS = new HashSet();
	 
	/**
	 * If true the parser don't distinguish between lower- or uppercase symbols (i.e. constants, function names,...)
	 */
	public static boolean PARSER_USE_LOWERCASE_SYMBOLS = true;

	/**
	 * Version string for console application
	 * 
	 */
	// public final static String VERSION = "00.00.70.00";

	/**
	 * true if the engine is started by a servlet

	 * In server mode the user can only assign values to variables with prefix '$' 

	 * 

	 * SERVER_MODE should be set to true in the initialization of a servlet
	 * 
	 */
	public static boolean SERVER_MODE = false;

	/**
	 * See Wikipedia: Machine epsilon
	 */
	public static double DOUBLE_EPSILON = Precision.EPSILON;

	/**
	 * The double tolerance used for comparisons.
	 */
	public final static double DOUBLE_TOLERANCE = DOUBLE_EPSILON * 10d;

	/**
	 * Maximum size of the BigInteger words in server mode.
	 * 
	 * @see apache.harmony.math.BigInteger
	 */
	public static int BIGINTEGER_MAX_SIZE = 65536;

	/**
	 * Maximum size of the FastTable entries in server mode.
	 * 
	 * @see javolution.util.FastTable
	 */
	public static int FASTTABLE_MAX_SIZE = 65536;

	/**
	 * Maximum length of the StringImpl's String in server mode.
	 * 
	 * @see org.matheclipse.core.expression.Expression
	 */
	public static int STRING_MAX_SIZE = 4096;

	/**
	 * Maximum size of the AST pools in server mode.
	 * 
	 * @see org.matheclipse.core.expression.AST
	 */
	public static int AST_MAX_POOL_SIZE = 65536;

	/**
	 * Maximum size of the IntegerImpl pools in server mode.
	 * 
	 * @see org.matheclipse.core.expression.Expression
	 */
	public static int INTEGER_MAX_POOL_SIZE = 4096;

	/**
	 * Maximum size of the FractionImpl pools in server mode.
	 * 
	 * @see org.matheclipse.core.expression.Expression
	 */
	public static int FRACTION_MAX_POOL_SIZE = 4096;

	/**
	 * Maximum size of the ComplexImpl pools in server mode.
	 * 
	 * @see org.matheclipse.core.expression.Expression
	 */
	public static int COMPLEX_MAX_POOL_SIZE = 4096;

	/**
	 * Maximum size of the DoubleImpl pools in server mode.
	 * 
	 * @see org.matheclipse.core.expression.Expression
	 */
	public static int DOUBLE_MAX_POOL_SIZE = 65536;// 16384;

	/**
	 * Maximum size of the DoubleComplexImpl pools in server mode.
	 * 
	 * @see org.matheclipse.core.expression.Expression
	 */
	public static int DOUBLECOMPLEX_MAX_POOL_SIZE = 65536;// 16384;

	/**
	 * Maximum size of the PatternImpl pools in server mode.
	 * 
	 * @see org.matheclipse.core.expression.Expression
	 */
	public static int PATTERN_MAX_POOL_SIZE = 1024;

	/**
	 * Maximum size of the StringImpl pools in server mode.
	 * 
	 * @see org.matheclipse.core.expression.Expression
	 */
	public static int STRING_MAX_POOL_SIZE = 1024;

	/**
	 * Maximum size of the double vector's in server mode.
	 * 
	 * @see org.matheclipse.core.basic.Alloc
	 */
	public static int MAX_DOUBLE_VECTOR_SIZE = 65536;

	/**
	 * Maximum size of the double matrix's in server mode.
	 * 
	 * @see org.matheclipse.core.basic.Alloc
	 */
	public static int MAX_DOUBLE_MATRIX_SIZE = 65536;
}