/*
 * Copyright (c) 2005, The haXe Project Contributors
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE HAXE PROJECT CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE HAXE PROJECT CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

@:core_api @:final class String {

	static var __is_String;
	private static var __split : Dynamic = neko.Lib.load("std","string_split",2);

	static function __init__() : Void {
		__is_String = true;
	}

	public var length(default,null) : Int;

	public function new(s:String) : Void {
		untyped {
			if( __dollar__typeof(s) != __dollar__tstring )
				s = __dollar__string(s);
			this.__s = s;
			this.length = __dollar__ssize(s);
		}
	}

	public function charAt(index:Int) : String {
		untyped {
			try {
				var s = __dollar__smake(1);
				__dollar__sset(s,0,__dollar__sget(this.__s,index));
				return new String(s);
			} catch( e : Dynamic ) {
				return "";
			}
		}
	}

	public function charCodeAt(index : Int) : Null<Int> {
		untyped {
			return __dollar__sget(this.__s,index);
		}
	}

	public function indexOf( str : String, ?startIndex : Int ) : Int {
		untyped {
			var p = try __dollar__sfind(this.__s,if( startIndex == null ) 0 else startIndex,str.__s) catch( e : Dynamic ) null;
			if( p == null )
				return -1;
			return p;
		}
	}

	public function lastIndexOf( str : String, ?startIndex : Int ) : Int {
		untyped {
			var last = -1;
			if( startIndex == null )
				startIndex = __dollar__ssize(this.__s);
			while( true ) {
				var p = try __dollar__sfind(this.__s,last+1,str.__s) catch( e : Dynamic ) null;
				if( p == null || p > startIndex )
					return last;
				last = p;
			}
			return null;
		}
	}

	public function split( delimiter : String ) : Array<String> {
		untyped {
			var l = __split(this.__s,delimiter.__s);
			var a = new Array<String>();
			if( l == null ) {
				a.push("");
				return a;
			}
			do {
				a.push(new String(l[0]));
				l = l[1];
			} while( l != null );
			return a;
		}
	}

	public function substr( pos : Int, ?len : Int ) : String {
		if( len == 0 ) return "";
		var sl = length;

		if( len == null ) len = sl;

		if( pos == null ) pos = 0;
		if( pos != 0 && len < 0 ){
			return "";
		}

		if( pos < 0 ){
			pos = sl + pos;
			if( pos < 0 ) pos = 0;
		}else if( len < 0 ){
			len = sl + len - pos;
		}

		if( pos + len > sl ){
			len = sl - pos;
		}

		if( pos < 0 || len <= 0 ) return "";
		return new String(untyped __dollar__ssub(this.__s,pos,len));
	}

	public function toLowerCase() : String {
		untyped {
			var s = this.__s;
			var l = this.length;
			var s2 = __dollar__scopy(s);
			var i = 0;
			while( i < l ) {
				var c = __dollar__sget(s,i);
				if( c >= 65 && c <= 90 )
					__dollar__sset(s2,i,c-65+97);
				i++;
			}
			return new String(s2);
		}
	}

	public function toUpperCase() : String {
		untyped {
			var s = this.__s;
			var l = this.length;
			var s2 = __dollar__scopy(s);
			var i = 0;
			while( i < l ) {
				var c = __dollar__sget(s,i);
				if( c >= 97 && c <= 122 )
					__dollar__sset(s2,i,c-97+65);
				i++;
			}
			return new String(s2);
		}
	}

	public function toString() : String {
		return this;
	}

	/* NEKO INTERNALS */

	private function __compare(o:String) : Int {
		return untyped __dollar__compare(this.__s,o.__s);
	}

	private function __add(s:Dynamic) : String {
		return new String(untyped this.__s+__dollar__string(s));
	}

	private function __radd(s:Dynamic) : String {
		return new String(untyped __dollar__string(s)+this.__s);
	}

	public static function fromCharCode( code : Int ) : String untyped {
		var s = __dollar__smake(1);
		__dollar__sset(s,0,code);
		return new String(s);
	}

}