/*
 * Copyright (C)2005-2019 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.
 */

import cpp.ObjectType;

@:coreApi
@:analyzer(ignore)
class Reflect {
	public static function hasField(o:Dynamic, field:String):Bool
		untyped {
			return o != null && o.__HasField(field);
		}

	public static function field(o:Dynamic, field:String):Dynamic
		untyped {
			return (o == null) ? null : o.__Field(field, untyped __cpp__("hx::paccNever"));
		}

	public static function setField(o:Dynamic, field:String, value:Dynamic):Void
		untyped {
			if (o != null)
				o.__SetField(field, value, untyped __cpp__("hx::paccNever"));
		}

	public static function getProperty(o:Dynamic, field:String):Dynamic {
		return (o == null) ? null : o.__Field(field, untyped __cpp__("hx::paccAlways"));
	}

	public static function setProperty(o:Dynamic, field:String, value:Dynamic):Void {
		if (o != null)
			o.__SetField(field, value, untyped __cpp__("hx::paccAlways"));
	}

	public static function callMethod(o:Dynamic, func:haxe.Constraints.Function, args:Array<Dynamic>):Dynamic
		untyped {
			if (func != null && func.__GetType() == ObjectType.vtString) {
				if (o == null)
					throw cpp.ErrorConstants.invalidObject;
				func = o.__Field(func, untyped __cpp__("hx::paccDynamic"));
			}
			if (func == null)
				throw cpp.ErrorConstants.nullFunctionPointer;
			untyped func.__SetThis(o);
			return untyped func.__Run(args);
		}

	public static function fields(o:Dynamic):Array<String>
		untyped {
			if (o == null)
				return new Array();
			var a:Array<String> = [];
			o.__GetFields(a);
			return a;
		}

	public static function isFunction(f:Dynamic):Bool
		untyped {
			return f != null && f.__GetType() == ObjectType.vtFunction;
		}

	public static function compare<T>(a:T, b:T):Int {
		return (a == b) ? 0 : (((a : Dynamic) > (b : Dynamic)) ? 1 : -1);
	}

	public static function compareMethods(f1:Dynamic, f2:Dynamic):Bool {
		if (f1 == f2)
			return true;
		if (!isFunction(f1) || !isFunction(f2))
			return false;
		return untyped __global__.__hxcpp_same_closure(f1, f2);
	}

	public static function isObject(v:Dynamic):Bool
		untyped {
			if (v == null)
				return false;
			var t:Int = v.__GetType();
			return t == ObjectType.vtObject || t == ObjectType.vtClass || t == ObjectType.vtString || t == ObjectType.vtArray;
		}

	public static function isEnumValue(v:Dynamic):Bool
		untyped {
			return v != null && v.__GetType() == ObjectType.vtEnum;
		}

	public static function deleteField(o:Dynamic, field:String):Bool
		untyped {
			if (o == null)
				return false;
			return untyped __global__.__hxcpp_anon_remove(o, field);
		}

	public static function copy<T>(o:Null<T>):Null<T> {
		if (o == null)
			return null;
		if (untyped o.__GetType() == ObjectType.vtString)
			return o;
		if (untyped o.__GetType() == ObjectType.vtArray)
			return untyped o.__Field("copy", untyped __cpp__("hx::paccDynamic"))();
		var o2:Dynamic = {};
		for (f in Reflect.fields(o))
			Reflect.setField(o2, f, Reflect.field(o, f));
		return o2;
	}

	@:overload(function(f:Array<Dynamic>->Void):Dynamic {})
	public static function makeVarArgs(f:Array<Dynamic>->Dynamic):Dynamic {
		return untyped __global__.__hxcpp_create_var_args(f);
	}
}
