/** internal
 * class Core
 *
 * Top-level rules executor. Glues block/inline parsers and does intermediate
 * transformations.
 **/

import Ruler from './ruler.mjs'
import StateCore from './rules_core/state_core.mjs'

import r_normalize from './rules_core/normalize.mjs'
import r_block from './rules_core/block.mjs'
import r_inline from './rules_core/inline.mjs'
import r_linkify from './rules_core/linkify.mjs'
import r_replacements from './rules_core/replacements.mjs'
import r_smartquotes from './rules_core/smartquotes.mjs'
import r_text_join from './rules_core/text_join.mjs'


const _rules = [
  [ 'normalize',      r_normalize      ],
  [ 'block',          r_block          ],
  [ 'inline',         r_inline         ],
  [ 'linkify',        r_linkify        ],
  [ 'replacements',   r_replacements   ],
  [ 'smartquotes',    r_smartquotes    ],
  // `text_join` finds `text_special` tokens (for escape sequences)
  // and joins them with the rest of the text
  [ 'text_join',      r_text_join      ]
]


/**
 * new Core()
 **/
function Core() {
  /**
   * Core#ruler -> Ruler
   *
   * [[Ruler]] instance. Keep configuration of core rules.
   **/
  this.ruler = new Ruler()

  for (let i = 0; i < _rules.length; i++) {
    this.ruler.push(_rules[i][0], _rules[i][1])
  }
}


/**
 * Core.process(state)
 *
 * Executes core chain rules.
 **/
Core.prototype.process = function (state) {
  const rules = this.ruler.getRules('')

  for (let i = 0, l = rules.length; i < l; i++) {
    rules[i](state)
  }
}

Core.prototype.State = StateCore


export default Core