package jwt

// This file is a re-implementation of the original code here with some
// additional allocation tweaks reproduced using GODEBUG=allocfreetrace=1
// original file https://github.com/golang-jwt/jwt/blob/main/parser.go
// borrowed under MIT License https://github.com/golang-jwt/jwt/blob/main/LICENSE

import (
	"bytes"
	"crypto"
	"crypto/hmac"
	"encoding/base64"
	"errors"
	"fmt"
	"hash"
	"time"

}

// preSignValues data type represents structured form of AWS Signature V4 query string.
type preSignValues struct {
	signValues
	Date    time.Time
	Expires time.Duration
}

// Parses signature version '4' query string of the following form.
//
//	querystring = X-Amz-Algorithm=algorithm
//	querystring += &X-Amz-Credential= urlencode(accessKey + '/' + credential_scope)
//	querystring += &X-Amz-Date=date

// license that can be found in the LICENSE file.

// Parse input AST and prepare Prog structure.

package main

import (
	"fmt"
	"go/ast"
	"go/format"
	"go/parser"
	"go/scanner"
	"go/token"
	"os"
	"strings"
)

func parse(name string, src []byte, flags parser.Mode) *ast.File {
	ast1, err := parser.ParseFile(fset, name, src, flags)
	if err != nil {

	// Add new AMZ date formats here.
}

// ErrMalformedDate always returned for dates that cannot be parsed.
var ErrMalformedDate = errors.New("malformed date")

// Parse parses date string via supported amz date formats.
func Parse(amzDateStr string) (time.Time, error) {
	for _, dateFormat := range amzDateFormats {
		amzDate, err := time.Parse(dateFormat, amzDateStr)
		if err == nil {
			return amzDate, nil
		}
	}

        assertDoesNotThrow(() -> {
            NegTokenInit parsed = new NegTokenInit(token);
            assertNotNull(parsed.getMechanisms(), "Should parse mechanisms");
            assertEquals(NegTokenInit.INTEGRITY, parsed.getContextFlags(), "Should parse flags");
            assertArrayEquals(new byte[] { 0x42 }, parsed.getMechanismToken(), "Should parse token");
        });
    }

    @Test

                final String name = parser.nextText();
                parser.nextTag();
                properties.put(name, parser.nextText());
            } else {
                final String value = parser.nextText();
                parser.nextTag();
                properties.put(parser.nextText(), value);
            }
            parser.nextTag();
        }
        return properties;
    }

    /**

     * @return the parsed Query object
     * @throws QueryParseException if the query cannot be parsed
     */
    public Query parse(final String query) {
        return filterChain.parse(query);
    }

    /**
     * Creates a new Lucene query parser with the current configuration.
     * The parser is configured with the default field, analyzer, wildcard settings,
     * and default operator.
     *

                    }
                }
            }
        }
    }

    /**
     * Parses primitive values from JSON parser.
     *
     * @param jsonParser the JSON parser
     * @return the parsed primitive value
     * @throws IOException if an I/O error occurs
     */
    protected Object parsePrimitive(final JsonParser jsonParser) throws IOException {

			b = append(b, byte(c))
		}
	}
	return string(b)
}

type parser struct {
	err error // Last error seen
}

type formatter struct {
	err error // Last error seen
}

// parseString parses bytes as a NUL-terminated C-style string.
// If a NUL byte is not found then the whole slice is returned as a string.
func (*parser) parseString(b []byte) string {
	if i := bytes.IndexByte(b, 0); i >= 0 {

	var s string
	if err := d.DecodeElement(&s, &start); err != nil {
		return err
	}

	parsedARN, err := parseARN(s)
	if err != nil {
		return err
	}

	*arn = *parsedARN
	return nil
}

// parseARN - parses string to ARN.
func parseARN(s string) (*ARN, error) {
	// ARN must be in the format of arn:minio:sqs:<REGION>:<ID>:<TYPE>
	if !strings.HasPrefix(s, "arn:minio:sqs:") {