/*
 * Copyright (C)2005-2012 Haxe Foundation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

package;

import python.lib.Builtin;
import python.lib.Inspect;
import python.Boot;

@:keepInit
@:coreApi /*extern*/ class Std {

	public static inline function instance<T:{}, S:T>( value : T, c : Class<S> ) : S {
		try {
			return Builtin.isinstance(value,c) ? cast value : null;
		} catch (e:Dynamic) {
			return null;
		}


	}
	public static function is( v : Dynamic, t : Dynamic ) : Bool {

		if (v == null && t == null) {
			return false;
		}
		if (t == null) {

			return false;
		}
		if (t == (python.Syntax.pythonCode("Dynamic"))) {
			return true;
		}
		var isBool = Builtin.isinstance(v, (python.Syntax.pythonCode("bool")));

		if (t == (python.Syntax.pythonCode("Bool")) && isBool) {
			return true;
		}
		if (!isBool && t != (python.Syntax.pythonCode("Bool")) && t ==  (python.Syntax.pythonCode("Int")) && Builtin.isinstance(v, (python.Syntax.pythonCode("int")) )) {
			return true;
		}
		var vIsFloat = Builtin.isinstance(v, (python.Syntax.pythonCode("float")));

		if (!isBool && vIsFloat && t == (python.Syntax.pythonCode("Int")) && Math.isFinite(v) && v == Std.int(v)) {
			return true;
		}

		if (!isBool &&  t == (python.Syntax.pythonCode("Float")) && ( Builtin.isinstance(v, (python.Syntax.pythonCode("(float,int)"))))) {
			return true;
		}

		if ( t == (python.Syntax.pythonCode("str"))) {
			return Builtin.isinstance(v, String);
		}
		if (t == Enum && Inspect.isclass(v) && Builtin.hasattr(v, "_hx_constructs")) return true;

		if (t == Enum) return false;

		if (t == Date && Builtin.isinstance(v, Date)) return true;

		if (t == Date) return false;

		if (Builtin.isinstance(v, Date)) return false;

		if (t == Class && !Builtin.isinstance(v, untyped Enum) && Inspect.isclass(v) && Builtin.hasattr(v, "_hx_class_name") && !Builtin.hasattr(v, "_hx_constructs")) return true;

		if (t == Class) return false; // && !Builtin.isinstance(v, untyped Enum) && Builtin.hasattr(v, "__class__") && untyped Builtin.hasattr(v.__class__, "_hx_class_name") && !untyped Builtin.hasattr(v.__class__, "_hx_constructs")) return true;

		if (try Builtin.isinstance(v, t) catch (e:Dynamic) false) {
			return true;
		}
		if (Inspect.isclass(t)) {

			function loop (intf)
			{
				var f:Array<Dynamic> = if (Builtin.hasattr(intf,"_hx_interfaces")) Builtin.getattr(intf, "_hx_interfaces") else [];
				if (f != null) {
					for (i in f) {
						if ( i == t) {
							return true;
						} else {
							var l = loop(i);
							if (l) {
								return true;
							}
						}
					}
					return false;
				} else {
					return false;
				}
			}
			return loop(untyped v.__class__);


		} else {
			return false;
		}
	}

	@:access(python.Boot)
	@:keep
	public static function string( s : Dynamic ) : String
	{
		return python.Boot.toString(s);
	}

	public static inline function int( x : Float ) : Int
	{
		try {
			return (python.Syntax.pythonCode("int"))(x);
		} catch (e:Dynamic) {
			return null;
		}
	}

	public static function parseInt( x : String ) : Null<Int> {
		if (x == null) return null;
		try {
			return (python.Syntax.pythonCode("int"))(x);
		} catch (e:Dynamic) {
			try {
				var prefix = x.substr(0,2).toLowerCase();

				if (prefix == "0x") {
					return (python.Syntax.pythonCode("int"))(x,16);
				}
				throw "fail";
			} catch (e:Dynamic) {


				var r = int(parseFloat(x));

				if (r == null) {
					var r1 = shortenPossibleNumber(x);
					if (r1 != x) {
						return parseInt(r1);
					} else {
						return null;
					}
				}
				return r;
			}
		}
	}

	static function shortenPossibleNumber (x:String):String
	{
		var r = "";
		for (i in 0...x.length) {
			var c = x.charAt(i);
			switch (c.charCodeAt(0)) {
				case "0".code
				| "1".code
				| "2".code
				| "3".code
				| "4".code
				| "5".code
				| "6".code
				| "7".code
				| "8".code
				| "9".code
				| ".".code : r += c;
				case _ : break;
			}
		}
		return r;
	}

	public static function parseFloat( x : String ) : Float
	{
		try {
			return python.Syntax.pythonCode("float")(x);
		} catch (e:Dynamic) {

			if (x != null) {
				var r1 = shortenPossibleNumber(x);
				if (r1 != x) {
					return parseFloat(r1);
				}
			}
			return Math.NaN;

		}

	}


	public static inline function random( x : Int ) : Int {
		if (x <= 0) {
			return 0;
		} else {
			return int(Math.random()*x);
		}

		//return dart.Lib.random(x);
//		return untyped __cascade__(new dartt.math.Random(), nextInt(x));// //untyped x <= 0 ? 0 : Math.floor(Math.random()*x);		import 'dart:marth'; new Random()..nextInt(x);
	}
}