/**
 * @typedef {import('micromark-util-types').Construct} Construct
 * @typedef {import('micromark-util-types').Resolver} Resolver
 * @typedef {import('micromark-util-types').Tokenizer} Tokenizer
 * @typedef {import('micromark-util-types').State} State
 * @typedef {import('micromark-util-types').Code} Code
 */
import {
  asciiAlpha,
  asciiAlphanumeric,
  markdownLineEnding,
  markdownLineEndingOrSpace,
  markdownSpace
} from 'micromark-util-character'
import {htmlBlockNames, htmlRawNames} from 'micromark-util-html-tag-name'
import {blankLine} from './blank-line.js'
/** @type {Construct} */

export const htmlFlow = {
  name: 'htmlFlow',
  tokenize: tokenizeHtmlFlow,
  resolveTo: resolveToHtmlFlow,
  concrete: true
}
/** @type {Construct} */

const nextBlankConstruct = {
  tokenize: tokenizeNextBlank,
  partial: true
}
/** @type {Resolver} */

function resolveToHtmlFlow(events) {
  let index = events.length

  while (index--) {
    if (events[index][0] === 'enter' && events[index][1].type === 'htmlFlow') {
      break
    }
  }

  if (index > 1 && events[index - 2][1].type === 'linePrefix') {
    // Add the prefix start to the HTML token.
    events[index][1].start = events[index - 2][1].start // Add the prefix start to the HTML line token.

    events[index + 1][1].start = events[index - 2][1].start // Remove the line prefix.

    events.splice(index - 2, 2)
  }

  return events
}
/** @type {Tokenizer} */

function tokenizeHtmlFlow(effects, ok, nok) {
  const self = this
  /** @type {number} */

  let kind
  /** @type {boolean} */

  let startTag
  /** @type {string} */

  let buffer
  /** @type {number} */

  let index
  /** @type {Code} */

  let marker
  return start
  /** @type {State} */

  function start(code) {
    effects.enter('htmlFlow')
    effects.enter('htmlFlowData')
    effects.consume(code)
    return open
  }
  /** @type {State} */

  function open(code) {
    if (code === 33) {
      effects.consume(code)
      return declarationStart
    }

    if (code === 47) {
      effects.consume(code)
      return tagCloseStart
    }

    if (code === 63) {
      effects.consume(code)
      kind = 3 // While we’re in an instruction instead of a declaration, we’re on a `?`
      // right now, so we do need to search for `>`, similar to declarations.

      return self.interrupt ? ok : continuationDeclarationInside
    }

    if (asciiAlpha(code)) {
      effects.consume(code)
      buffer = String.fromCharCode(code)
      startTag = true
      return tagName
    }

    return nok(code)
  }
  /** @type {State} */

  function declarationStart(code) {
    if (code === 45) {
      effects.consume(code)
      kind = 2
      return commentOpenInside
    }

    if (code === 91) {
      effects.consume(code)
      kind = 5
      buffer = 'CDATA['
      index = 0
      return cdataOpenInside
    }

    if (asciiAlpha(code)) {
      effects.consume(code)
      kind = 4
      return self.interrupt ? ok : continuationDeclarationInside
    }

    return nok(code)
  }
  /** @type {State} */

  function commentOpenInside(code) {
    if (code === 45) {
      effects.consume(code)
      return self.interrupt ? ok : continuationDeclarationInside
    }

    return nok(code)
  }
  /** @type {State} */

  function cdataOpenInside(code) {
    if (code === buffer.charCodeAt(index++)) {
      effects.consume(code)
      return index === buffer.length
        ? self.interrupt
          ? ok
          : continuation
        : cdataOpenInside
    }

    return nok(code)
  }
  /** @type {State} */

  function tagCloseStart(code) {
    if (asciiAlpha(code)) {
      effects.consume(code)
      buffer = String.fromCharCode(code)
      return tagName
    }

    return nok(code)
  }
  /** @type {State} */

  function tagName(code) {
    if (
      code === null ||
      code === 47 ||
      code === 62 ||
      markdownLineEndingOrSpace(code)
    ) {
      if (
        code !== 47 &&
        startTag &&
        htmlRawNames.includes(buffer.toLowerCase())
      ) {
        kind = 1
        return self.interrupt ? ok(code) : continuation(code)
      }

      if (htmlBlockNames.includes(buffer.toLowerCase())) {
        kind = 6

        if (code === 47) {
          effects.consume(code)
          return basicSelfClosing
        }

        return self.interrupt ? ok(code) : continuation(code)
      }

      kind = 7 // Do not support complete HTML when interrupting

      return self.interrupt && !self.parser.lazy[self.now().line]
        ? nok(code)
        : startTag
        ? completeAttributeNameBefore(code)
        : completeClosingTagAfter(code)
    }

    if (code === 45 || asciiAlphanumeric(code)) {
      effects.consume(code)
      buffer += String.fromCharCode(code)
      return tagName
    }

    return nok(code)
  }
  /** @type {State} */

  function basicSelfClosing(code) {
    if (code === 62) {
      effects.consume(code)
      return self.interrupt ? ok : continuation
    }

    return nok(code)
  }
  /** @type {State} */

  function completeClosingTagAfter(code) {
    if (markdownSpace(code)) {
      effects.consume(code)
      return completeClosingTagAfter
    }

    return completeEnd(code)
  }
  /** @type {State} */

  function completeAttributeNameBefore(code) {
    if (code === 47) {
      effects.consume(code)
      return completeEnd
    }

    if (code === 58 || code === 95 || asciiAlpha(code)) {
      effects.consume(code)
      return completeAttributeName
    }

    if (markdownSpace(code)) {
      effects.consume(code)
      return completeAttributeNameBefore
    }

    return completeEnd(code)
  }
  /** @type {State} */

  function completeAttributeName(code) {
    if (
      code === 45 ||
      code === 46 ||
      code === 58 ||
      code === 95 ||
      asciiAlphanumeric(code)
    ) {
      effects.consume(code)
      return completeAttributeName
    }

    return completeAttributeNameAfter(code)
  }
  /** @type {State} */

  function completeAttributeNameAfter(code) {
    if (code === 61) {
      effects.consume(code)
      return completeAttributeValueBefore
    }

    if (markdownSpace(code)) {
      effects.consume(code)
      return completeAttributeNameAfter
    }

    return completeAttributeNameBefore(code)
  }
  /** @type {State} */

  function completeAttributeValueBefore(code) {
    if (
      code === null ||
      code === 60 ||
      code === 61 ||
      code === 62 ||
      code === 96
    ) {
      return nok(code)
    }

    if (code === 34 || code === 39) {
      effects.consume(code)
      marker = code
      return completeAttributeValueQuoted
    }

    if (markdownSpace(code)) {
      effects.consume(code)
      return completeAttributeValueBefore
    }

    marker = null
    return completeAttributeValueUnquoted(code)
  }
  /** @type {State} */

  function completeAttributeValueQuoted(code) {
    if (code === null || markdownLineEnding(code)) {
      return nok(code)
    }

    if (code === marker) {
      effects.consume(code)
      return completeAttributeValueQuotedAfter
    }

    effects.consume(code)
    return completeAttributeValueQuoted
  }
  /** @type {State} */

  function completeAttributeValueUnquoted(code) {
    if (
      code === null ||
      code === 34 ||
      code === 39 ||
      code === 60 ||
      code === 61 ||
      code === 62 ||
      code === 96 ||
      markdownLineEndingOrSpace(code)
    ) {
      return completeAttributeNameAfter(code)
    }

    effects.consume(code)
    return completeAttributeValueUnquoted
  }
  /** @type {State} */

  function completeAttributeValueQuotedAfter(code) {
    if (code === 47 || code === 62 || markdownSpace(code)) {
      return completeAttributeNameBefore(code)
    }

    return nok(code)
  }
  /** @type {State} */

  function completeEnd(code) {
    if (code === 62) {
      effects.consume(code)
      return completeAfter
    }

    return nok(code)
  }
  /** @type {State} */

  function completeAfter(code) {
    if (markdownSpace(code)) {
      effects.consume(code)
      return completeAfter
    }

    return code === null || markdownLineEnding(code)
      ? continuation(code)
      : nok(code)
  }
  /** @type {State} */

  function continuation(code) {
    if (code === 45 && kind === 2) {
      effects.consume(code)
      return continuationCommentInside
    }

    if (code === 60 && kind === 1) {
      effects.consume(code)
      return continuationRawTagOpen
    }

    if (code === 62 && kind === 4) {
      effects.consume(code)
      return continuationClose
    }

    if (code === 63 && kind === 3) {
      effects.consume(code)
      return continuationDeclarationInside
    }

    if (code === 93 && kind === 5) {
      effects.consume(code)
      return continuationCharacterDataInside
    }

    if (markdownLineEnding(code) && (kind === 6 || kind === 7)) {
      return effects.check(
        nextBlankConstruct,
        continuationClose,
        continuationAtLineEnding
      )(code)
    }

    if (code === null || markdownLineEnding(code)) {
      return continuationAtLineEnding(code)
    }

    effects.consume(code)
    return continuation
  }
  /** @type {State} */

  function continuationAtLineEnding(code) {
    effects.exit('htmlFlowData')
    return htmlContinueStart(code)
  }
  /** @type {State} */

  function htmlContinueStart(code) {
    if (code === null) {
      return done(code)
    }

    if (markdownLineEnding(code)) {
      return effects.attempt(
        {
          tokenize: htmlLineEnd,
          partial: true
        },
        htmlContinueStart,
        done
      )(code)
    }

    effects.enter('htmlFlowData')
    return continuation(code)
  }
  /** @type {Tokenizer} */

  function htmlLineEnd(effects, ok, nok) {
    return start
    /** @type {State} */

    function start(code) {
      effects.enter('lineEnding')
      effects.consume(code)
      effects.exit('lineEnding')
      return lineStart
    }
    /** @type {State} */

    function lineStart(code) {
      return self.parser.lazy[self.now().line] ? nok(code) : ok(code)
    }
  }
  /** @type {State} */

  function continuationCommentInside(code) {
    if (code === 45) {
      effects.consume(code)
      return continuationDeclarationInside
    }

    return continuation(code)
  }
  /** @type {State} */

  function continuationRawTagOpen(code) {
    if (code === 47) {
      effects.consume(code)
      buffer = ''
      return continuationRawEndTag
    }

    return continuation(code)
  }
  /** @type {State} */

  function continuationRawEndTag(code) {
    if (code === 62 && htmlRawNames.includes(buffer.toLowerCase())) {
      effects.consume(code)
      return continuationClose
    }

    if (asciiAlpha(code) && buffer.length < 8) {
      effects.consume(code)
      buffer += String.fromCharCode(code)
      return continuationRawEndTag
    }

    return continuation(code)
  }
  /** @type {State} */

  function continuationCharacterDataInside(code) {
    if (code === 93) {
      effects.consume(code)
      return continuationDeclarationInside
    }

    return continuation(code)
  }
  /** @type {State} */

  function continuationDeclarationInside(code) {
    if (code === 62) {
      effects.consume(code)
      return continuationClose
    } // More dashes.

    if (code === 45 && kind === 2) {
      effects.consume(code)
      return continuationDeclarationInside
    }

    return continuation(code)
  }
  /** @type {State} */

  function continuationClose(code) {
    if (code === null || markdownLineEnding(code)) {
      effects.exit('htmlFlowData')
      return done(code)
    }

    effects.consume(code)
    return continuationClose
  }
  /** @type {State} */

  function done(code) {
    effects.exit('htmlFlow')
    return ok(code)
  }
}
/** @type {Tokenizer} */

function tokenizeNextBlank(effects, ok, nok) {
  return start
  /** @type {State} */

  function start(code) {
    effects.exit('htmlFlowData')
    effects.enter('lineEndingBlank')
    effects.consume(code)
    effects.exit('lineEndingBlank')
    return effects.attempt(blankLine, ok, nok)
  }
}