// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package cookiejar

// This file implements the Punycode algorithm from RFC 3492.

import (
	"fmt"
	"net/http/internal/ascii"
	"strings"
	"unicode/utf8"
)

// These parameter values are specified in section 5.
//
// All computation is done with int32s, so that overflow behavior is identical

 * limitations under the License.
 */
package okhttp3.internal.idn

import okio.Buffer
import okio.ByteString.Companion.encodeUtf8

/**
 * An [RFC 3492] punycode decoder for converting ASCII to Unicode domain name labels. This is
 * intended for use in Internationalized Domain Names (IDNs).
 *
 * This class contains a Kotlin implementation of the pseudocode specified by RFC 3492. It includes

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package idna

// This file implements the Punycode algorithm from RFC 3492.

import (
	"math"
	"strings"
	"unicode/utf8"
)

// These parameter values are specified in section 5.
//
// All computation is done with int32s, so that overflow behavior is identical

    )
    assertNull(
      Punycode.encode(a1000MaxCodePoint.repeat(2)),
    )
  }

  @Test fun invalidPunycode() {
    assertNull(Punycode.decode("xn--ls8h="))
  }

  private fun testEncodeDecode(
    unicode: String,
    punycode: String,
  ) {
    assertEquals(unicode, Punycode.decode(punycode))
    assertEquals(punycode, Punycode.encode(unicode))
  }

  private fun testDecodeOnly(

    "output": "x..xn--zca"
  },
  {
    "comment": "Invalid Punycode",
    "input": "xn--a",
    "output": null
  },
  {
    "input": "xn--a.xn--zca",
    "output": null
  },
  {
    "input": "xn--a.ß",
    "output": null
  },
  {
    "input": "xn--ls8h=",
    "output": null
  },
  {
    "comment": "Invalid Punycode (contains non-ASCII character)",
    "input": "xn--tešla",
    "output": null

//    error in the future.
// I think Option 1 is best, but it is quite opinionated.

// ToASCII is a wrapper for Punycode.ToASCII.
func ToASCII(s string) (string, error) {
	return Punycode.process(s, true)
}

// ToUnicode is a wrapper for Punycode.ToUnicode.
func ToUnicode(s string) (string, error) {
	return Punycode.process(s, false)
}

// An Option configures a Profile at creation time.
type Option func(*options)

      }
    },

    /** URLs that contain this character in this component are invalid.  */
    FORBIDDEN,

    /** Hostnames that contain this character are encoded with punycode.  */
    PUNYCODE,

    /** This code point is special and should not be tested.  */
    SKIP,

    ;

    open fun encode(codePoint: Int): String {
      throw UnsupportedOperationException()
    }

//    error in the future.
// I think Option 1 is best, but it is quite opinionated.

// ToASCII is a wrapper for Punycode.ToASCII.
func ToASCII(s string) (string, error) {
	return Punycode.process(s, true)
}

// ToUnicode is a wrapper for Punycode.ToUnicode.
func ToUnicode(s string) (string, error) {
	return Punycode.process(s, false)
}

// An Option configures a Profile at creation time.
type Option func(*options)

		case c >= 'a' && c <= 'z':
		case c == '_':
		default:
			rst.fail("invalid character in identifier")
		}
	}

	if isPunycode {
		id = rst.expandPunycode(id)
	}

	return id, isPunycode
}

// expandPunycode decodes the Rust version of punycode.
// This algorithm is taken from RFC 3492 section 6.2.
func (rst *rustState) expandPunycode(s string) string {
	const (
		base        = 36

      // OkHttp does not reject invalid Punycode.
      "xn--a",
      "xn--a.ß",
      "xn--a.xn--zca",
      "xn--a-yoc",
      // OkHttp doesn't reject U+FFFD encoded in Punycode.
      "xn--zn7c.com",
      // OkHttp doesn't reject a U+200D. https://www.rfc-editor.org/rfc/rfc5892.html#appendix-A.2
      "xn--1ug.example",