// ------------------------------------------------------------------------
//   Project atila
//   Active Thing (activething.com) git.activething.com/go
//
//   File name  topic.go
//   Created by DEV
//   Modified   18/02/2024
//
//   Copyright 2024 activething.com 
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------

package tokens



type (


	Topic struct {
		kind TokenKind
		source []byte
		tokens []Token
	}
)


func NewTopic(builder *Tokenizer, topic []byte, allows TokenKind) *Topic {
	tp := &Topic{ source: topic }
	tp.tokens, tp.kind = builder.Tokenize(topic, allows)
	return tp
}


func (t Topic) Len() int {
	return len(t.tokens) }


func (t Topic) Kind() TokenKind {
	return t.kind }


func (t Topic) Source() []byte {
	return t.source }


func (t Topic) Tokens() []Token {
	return t.tokens }


func (t Topic) String() string {
	return string(t.source) }


func (t Topic) Match(subject [][]byte) bool {
	if t.kind.HasInvalid() {
		return false
	}
	ln := len(t.tokens)
	ls := len(subject)

	if ln != ls {
		if ln > ls {
			return false
		}
		if !t.kind.HasRelative() {
			return false
		}
	}

	for i := 0; i < ln; i++ {
		if t.tokens[i].Kind()&TokenKindMatchable != 0 {
			if !t.tokens[i].Match(subject[i]) {
				return false
			}
		}
	}
	return true
}

/*
   ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

   I HAVE NO DESIRE TO WALK ON WATER," SAID SIDDHARTA.
   "LET THE OLD SHRAMANAS SATISFY THEMSELVES WITH SUCH SKILLS.

   SIDDHARTA
   - HERMANN HESSE -

   :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

*/