<?php
/*---------------------------------------------------------------------------------------------
 * Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

namespace PhpParser;
/**
 *
 */
class Token implements \JsonSerializable {
    // TODO optimize memory - ideally this would be a struct of 4 ints
    public $kind;
    public $fullStart;
    public $start;
    public $length;

    public function __construct($kind, $fullStart, $start, $length) {
        $this->kind = $kind;
        $this->fullStart = $fullStart;
        $this->start = $start;
        $this->length = $length;
    }

    public function getTriviaForToken(string $document) : string {
        return substr($document, $this->fullStart, $this->start - $this->fullStart);
    }

    public function getTextForToken(string $document) : string {
        return substr($document, $this->start, $this->length - ($this->start - $this->fullStart));
    }

    public function getFullTextForToken(string $document) : string {
        return substr($document, $this->fullStart, $this->length);
    }

    public function getEnd() {
        return $this->fullStart + $this->length;
    }

    function jsonSerialize() {
        $kindName = $this->getTokenKindNameFromValue($this->kind);

        if (!isset($GLOBALS["SHORT_TOKEN_SERIALIZE"])) {
            $GLOBALS["SHORT_TOKEN_SERIALIZE"] = false;
        }
        
        if ($GLOBALS["SHORT_TOKEN_SERIALIZE"]) {
            return [
                "kind" => $kindName,
                "textLength" => $this->length - ($this->start - $this->fullStart)
            ];
        } else {
            return [
                "kind" => $kindName,
                "fullStart" => $this->fullStart,
                "start" => $this->start,
                "length" => $this->length
            ];
        }        
    }

    public static function getTokenKindNameFromValue($kindName) {
        $constants = (new \ReflectionClass("PhpParser\\TokenKind"))->getConstants();
        foreach ($constants as $name => $val) {
            if ($val == $kindName) {
                $kindName = $name;
            }
        }
        return $kindName;
    }
}

class MissingToken extends Token {
    public function __construct(int $kind, int $fullStart) {
        parent::__construct($kind, $fullStart, $fullStart, 0);
    }

    function jsonSerialize() {
        return array_merge(
            ["error" => $this->getTokenKindNameFromValue(TokenKind::MissingToken)],
            parent::jsonSerialize()
        );
    }
}

class SkippedToken extends Token {
    public function __construct(Token $token) {
        parent::__construct($token->kind, $token->fullStart, $token->start, $token->length);
    }

    function jsonSerialize() {
        return array_merge(
            ["error" => $this->getTokenKindNameFromValue(TokenKind::SkippedToken)],
            parent::jsonSerialize()
        );
    }
}

// TODO enum equivalent?
class TokenKind {
    const Unknown = 0;
    const EndOfFileToken = 1;

    const Name = 2;
    const VariableName = 3;

    const SkippedToken = 4;
    const MissingToken = 5;
    const QualifiedName = 6;


    const AbstractKeyword = 101;
    const AndKeyword = 102;
    const ArrayKeyword = 103;
    const AsKeyword = 104;
    const BreakKeyword = 105;
    const CallableKeyword = 106;
    const CaseKeyword = 107;
    const CatchKeyword = 108;
    const ClassKeyword = 109;
    const CloneKeyword = 110;
    const ConstKeyword = 111;
    const ContinueKeyword = 112;
    const DeclareKeyword = 113;
    const DefaultKeyword = 114;
    const DieKeyword = 115;
    const DoKeyword = 116;
    const EchoKeyword = 117;
    const ElseKeyword = 118;
    const ElseIfKeyword = 119;
    const EmptyKeyword = 120;
    const EndDeclareKeyword = 121;
    const EndForKeyword = 122;
    const EndForEachKeyword = 123;
    const EndIfKeyword = 124;
    const EndSwitchKeyword = 125;
    const EndWhileKeyword = 126;
    const EvalKeyword = 127;
    const ExitKeyword = 128;
    const ExtendsKeyword = 129;
    const FinalKeyword = 130;
    const FinallyKeyword = 131;
    const ForKeyword = 132;
    const ForeachKeyword = 133;
    const FunctionKeyword = 134;
    const GlobalKeyword = 135;
    const GotoKeyword = 136;
    const IfKeyword = 137;
    const ImplementsKeyword = 138;
    const IncludeKeyword = 139;
    const IncludeOnceKeyword = 140;
    const InstanceOfKeyword = 141;
    const InsteadOfKeyword = 142;
    const InterfaceKeyword = 143;
    const IsSetKeyword = 144;
    const ListKeyword = 145;
    const NamespaceKeyword = 146;
    const NewKeyword = 147;
    const OrKeyword = 148;
    const PrintKeyword = 149;
    const PrivateKeyword = 150;
    const ProtectedKeyword = 151;
    const PublicKeyword = 152;
    const RequireKeyword = 153;
    const RequireOnceKeyword = 154;
    const ReturnKeyword = 155;
    const StaticKeyword = 156;
    const SwitchKeyword = 157;
    const ThrowKeyword = 158;
    const TraitKeyword = 159;
    const TryKeyword = 160;
    const UnsetKeyword = 161;
    const UseKeyword = 162;
    const VarKeyword = 163;
    const WhileKeyword = 164;
    const XorKeyword = 165;
    const YieldKeyword = 166;
    const YieldFromKeyword = 167;

    const OpenBracketToken = 201;
    const CloseBracketToken = 202;
    const OpenParenToken = 203;
    const CloseParenToken = 204;
    const OpenBraceToken = 205;
    const CloseBraceToken = 206;
    const DotToken = 207;
    const ArrowToken = 208;
    const PlusPlusToken = 209;
    const MinusMinusToken = 210;
    const AsteriskAsteriskToken = 211;
    const AsteriskToken = 212;
    const PlusToken = 213;
    const MinusToken = 214;
    const TildeToken = 215;
    const ExclamationToken = 216;
    const DollarToken = 217;
    const SlashToken = 218;
    const PercentToken = 220;
    const LessThanLessThanToken = 221;
    const GreaterThanGreaterThanToken = 222;
    const LessThanToken = 223;
    const GreaterThanToken = 224;
    const LessThanEqualsToken = 225;
    const GreaterThanEqualsToken = 226;
    const EqualsEqualsToken = 227;
    const EqualsEqualsEqualsToken = 228;
    const ExclamationEqualsToken = 229;
    const ExclamationEqualsEqualsToken = 230;
    const CaretToken = 231;
    const BarToken = 232;
    const AmpersandToken = 233;
    const AmpersandAmpersandToken = 234;
    const BarBarToken = 235;
    const ColonToken = 236;
    const SemicolonToken = 237;
    const EqualsToken = 238;
    const AsteriskAsteriskEqualsToken = 239;
    const AsteriskEqualsToken = 240;
    const SlashEqualsToken = 241;
    const PercentEqualsToken = 242;
    const PlusEqualsToken = 243;
    const MinusEqualsToken = 244;
    const DotEqualsToken = 245;
    const LessThanLessThanEqualsToken = 246;
    const GreaterThanGreaterThanEqualsToken = 247;
    const AmpersandEqualsToken = 248;
    const CaretEqualsToken = 249;
    const BarEqualsToken = 250;
    const CommaToken = 251;
    const QuestionQuestionToken = 252;
    const LessThanEqualsGreaterThanToken = 253;
    const DotDotDotToken = 254;
    const BackslashToken = 255;
    const ColonColonToken = 256;
    const DoubleArrowToken = 257; // TODO missing from spec
    const LessThanGreaterThanToken = 258; // TODO missing from spec
    const AtSymbolToken = 259;
    const BacktickToken = 260;
    const QuestionToken = 261;

    const DecimalLiteralToken = 301;
    const OctalLiteralToken = 302;
    const HexadecimalLiteralToken = 303;
    const BinaryLiteralToken = 304;
    const FloatingLiteralToken = 305;
    const InvalidOctalLiteralToken = 306;
    const InvalidHexadecimalLiteral = 307;
    const InvalidBinaryLiteral = 308;
    const StringLiteralToken = 309;
    const UnterminatedStringLiteralToken = 310;

    const TemplateStringStart = 311;
    const TemplateStringMiddle = 312;
    const TemplateStringEnd = 313;
    const NoSubstitutionTemplateLiteral = 314;
    const UnterminatedNoSubstitutionTemplateLiteral = 315;
    const UnterminatedTemplateStringEnd = 316;

    // RESERVED WORDS
    const IntReservedWord = 317;
    const FloatReservedWord = 318;
    const TrueReservedWord = 319;
    const StringReservedWord = 320;
    const BoolReservedWord = 321;
    const NullReservedWord = 322;

    const ScriptSectionStartTag = 323;
    const ScriptSectionEndTag = 324;


    // TODO how to handle incremental parsing w/ this?
    const ScriptSectionPrependedText = 325;
    const VoidReservedWord = 326;
    const FalseReservedWord = 327;

    const MemberName = 328;
    const Expression = 329;

    const BinaryReservedWord = 330; // TODO better way
    const BooleanReservedWord = 331;
    const DoubleReservedWord = 332;
    const IntegerReservedWord = 333;
    const ObjectReservedWord = 334;
    const RealReservedWord = 335;
    const ReturnType = 336;
    const InlineHtml = 337;

    // TODO type annotations - PHP7
}