/* -----------------------------------------------------------------------------
Copyright 2023 Kevin P. Barry

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.
----------------------------------------------------------------------------- */

// Author: Kevin P. Barry [ta0kira@gmail.com]

define ZeoliteToken {
  @value String content
  @value String label

  new (content, label) {
    if (content.size() < 1) {
      return empty
    } else {
      return delegate -> #self
    }
  }

  exportWith (formatter) {
    return formatter.format(content: content, label: label)
  }

  testCompare (actual, report) {
    \ MultiChecker.new(report)
        .tryCheck(
            title: "content",
            actual.content(),
            CheckValue:equals(content))
        .tryCheck(
            title: "label",
            actual.label(),
            CheckValue:equals(label))
  }

  formatted () {
    return String.builder()
        .append("ZeoliteToken{\"")
        .append(CharType.escapeBreaks(content))
        .append("\",")
        .append(label)
        .append("}")
        .build()
  }

  @value content () -> (String)
  content () {
    return content
  }

  @value label () -> (String)
  label () {
    return label
  }
}

define ZeoliteTokenizers {
  $ReadOnlyExcept[]$

  @value HashedMap<String, Tokenizer<String, ZeoliteToken>> tokenizers

  new () {
    return #self{ HashedMap<String, Tokenizer<String, ZeoliteToken>>.new() }
  }

  include () {
    \ #t.tokenizerName() `tokenizers.set` #t.tokenizer()
    return self
  }

  get (k) {
    return delegate -> `tokenizers.get`
  }
}

define ZeoliteSelectFrom {
  $ReadOnlyExcept[]$

  @value MultiTokenizer<String, ZeoliteToken> selector

  new () {
    return #self{ MultiTokenizer<String, ZeoliteToken>.new() }
  }

  include () {
    \ selector.include(#t.tokenizerName())
    return self
  }

  tokenize (input, tokenizers) {
    return delegate -> `selector.tokenize`
  }
}

define ZeoliteWhitespace {
  refines Tokenizer<String, ZeoliteToken>

  tokenizer () {
    return #self{ }
  }

  tokenizerName () {
    return typename<#self>().formatted()
  }

  tokenize (input, tokenizers) (token, nextType, popCount) {
    \ input.reset()
    token <- empty
    nextType <- empty
    popCount <- 0
    optional Char current <- input.current()
    while (`present` current && CharType.whitespace(`require` current)) {
      current <- input.forward().current()
    }
    token <- ZeoliteToken.new(content: input.take(), label: tokenizerName())
  }
}

define ZeoliteLineComment {
  refines Tokenizer<String, ZeoliteToken>

  tokenizer () {
    return #self{ }
  }

  tokenizerName () {
    return typename<#self>().formatted()
  }

  tokenize (input, tokenizers) (token, nextType, popCount) {
    \ input.reset()
    token <- empty
    nextType <- empty
    popCount <- 0
    \ input.forward().forward()
    if (input.preview() != "//") {
      return _
    }
    optional Char current <- input.current()
    while (`present` current && !CharType.oneOf(`require` current, "\r\n")) {
      current <- input.forward().current()
    }
    token <- ZeoliteToken.new(content: input.take(), label: tokenizerName())
  }
}

define ZeoliteCategoryName {
  refines Tokenizer<String, ZeoliteToken>

  tokenizer () {
    return #self{ }
  }

  tokenizerName () {
    return typename<#self>().formatted()
  }

  tokenize (input, tokenizers) (token, nextType, popCount) {
    \ input.reset()
    token <- empty
    nextType <- empty
    popCount <- 0
    optional Char current <- input.current()
    if (! `present` current || !CharType.upper(`require` current)) {
      return _
    }
    while (`present` current && CharType.alphaNum(`require` current)) {
      current <- input.forward().current()
    }
    token <- ZeoliteToken.new(content: input.take(), label: tokenizerName())
  }
}

define ZeoliteParamName {
  refines Tokenizer<String, ZeoliteToken>

  tokenizer () {
    return #self{ }
  }

  tokenizerName () {
    return typename<#self>().formatted()
  }

  tokenize (input, tokenizers) (token, nextType, popCount) {
    \ input.reset()
    token <- empty
    nextType <- empty
    popCount <- 0
    optional Char current <- input.current()
    if (! `present` current || `require` current != '#') {
      return _
    }
    current <- input.forward().current()
    if (! `present` current || !CharType.lower(`require` current)) {
      return _
    }
    while (`present` current && CharType.alphaNum(`require` current)) {
      current <- input.forward().current()
    }
    token <- ZeoliteToken.new(content: input.take(), label: tokenizerName())
  }
}