const { ICONS, ICONS_NEXTGEN, ICONS_NEXTGEN_LEGACY_MAPPINGS } = require('../constants')

// Markdown Helpers

// Check if an icon exists.
function _iconExists(icon){
  if(ICONS_NEXTGEN_LEGACY_MAPPINGS[icon]) icon = ICONS_NEXTGEN_LEGACY_MAPPINGS[icon]
  return (!ICONS_NEXTGEN[icon] && !ICONS[icon]);
}

// Internal icon resolver
function _icon(icon){
  let i = ICONS.question;

  // apply nextgen icon mappings
  if(ICONS_NEXTGEN_LEGACY_MAPPINGS[icon]) icon = ICONS_NEXTGEN_LEGACY_MAPPINGS[icon]
  
  // The icon resolve order matters - nextgen icons should always take priority
  if(ICONS[icon]) i = ICONS[icon];
  if(ICONS_NEXTGEN[icon]) i = ICONS_NEXTGEN[icon];

  return i.replace(/:[a-z1-9_]*:/, ':i:');
}

// Ensures potentially user-provided content won't escape pill components
function _escapeCodeblock(content){
  return content.toString().replace(/\`/g, 'ˋ');
}

module.exports.icon = _icon;

module.exports.iconAsEmojiObject = function(icon){
  let i = _icon(icon);

  return {
    id: i.replace(/<:[a-z0-9_]*:([0-9]*)>/g,"$1"),
    name: i,
    animated: false, // TODO: fix this for animated emoji if we ever need them
  }

}

module.exports.weatherIcon = function(icon){
  if(!_iconExists("weather_" + icon)) return _icon("calendar");
  return _icon("weather_" + icon)
}

module.exports.highlight = function(content = ""){
  return "`" + content.toString().replace(/\`/g, 'ˋ') + "`"
}

module.exports.codeblock = function(type, content = ""){
  if(!content.length) return "```" + type + "```"
  return "```" + type + "\n" + _escapeCodeblock(content.join('\n')) + "```"
}

module.exports.link = function(url, masked, tooltip = "", embed = false){
  if(tooltip.length) tooltip = ` '${tooltip}'`
  if(masked && !embed) return `[${masked}](<${url.replace(/\)/g, '\\)')}>${tooltip})`
  if(masked && embed) return `[${masked}](${url.replace(/\)/g, '\\)')}${tooltip})`
  return url
}

module.exports.timestamp = function(time, flag = "t"){
  return `<t:${Math.floor(time/1000)}:${flag}>`
}

module.exports.stringwrap = function(content = "", length, newlines = true){
  if(!newlines) content = content.replace(/\n/, ' ')
  if(content.length > length){
    c = content.substring(0, length-1) + '…';
    while(c.endsWith(' …')) c = c.substr(0, c.length - 2) + '…';
    return c;
  }
  return content;
}

module.exports.pill = function(content = ""){
  return "  **` " + _escapeCodeblock(content) + "  `**"
}

module.exports.smallPill = function(content = ""){
  return "  ` " + _escapeCodeblock(content) + " `"
}

module.exports.iconPill = function(icon, content = ""){
  return _icon(icon) + "  **` " + _escapeCodeblock(content) + "  `**"
}

module.exports.smallIconPill = function(icon, content = ""){
  return _icon(icon) + "  ` " + _escapeCodeblock(content) + "  `"
}

module.exports.iconLinkPill = function(icon, url, content = "", tooltip = ""){
  if(tooltip.length) tooltip = ` '${tooltip}'`
  if(content) return `${_icon(icon)} [**\` ${_escapeCodeblock(content)}  \`**](${url.replace(/\)/g, '\\)')}${tooltip})`
  return url
}

module.exports.linkPill = function(url, content = "", tooltip = ""){
  if(tooltip.length) tooltip = ` '${tooltip}'`
  if(content) return `[**\` ${_escapeCodeblock(content)} \`**](${url.replace(/\)/g, '\\)')}${tooltip})`
  return url
}

const SUPERSCRIPT_NUMBERS = ["⁰","¹","²","³","⁴","⁵","⁶","⁷","⁸","⁹"]
module.exports.citation = function(number = 1, url, tooltip = ""){
  let formatted = "";
  for(const n of number.toString().split('')) formatted += SUPERSCRIPT_NUMBERS[parseInt(n)]
  if(url){
    if(tooltip.length){
      if(tooltip.endsWith(' ')) tooltip = tooltip.substring(0, tooltip.length - 1)
      tooltip = ` '${tooltip.replace(/["*]/g, '')}'`
    }
    return `[⁽${formatted}⁾](${url.replace(/\)/g, '\\)')}${tooltip})`
  }
  return `⁽${formatted}⁾`
}