module CensorBear
  class Result
    attr_accessor :is_mod, :mod_words, :content

    def initialize(content, is_mod = false, mod_words = [])
      @is_mod = is_mod
      @mod_words = mod_words
      @content = content || ''
    end
  end

  class Censor
    QQ_REG = /(?:[加茄qQ企鹅号码\s]{1,}|[群号]{1,}|[叩叩]{1,}|[抠抠]{1,}|[扣扣]{1,})(?:[\u4e00-\u9eff]*)(?:[:，：]?)([\d\s]{6,})/
    WX_REG = /(?:[加+微＋+➕薇？vV威卫星♥❤姓xX信]{2,}|weixin|weix)(?:[，❤️.\s]?)(?:[\u4e00-\u9eff]?)(?:[:，：]?)([\w\s]{6,})/

    def initialize(content, type = 'ugc')
      @is_mod = false
      @mod_words = []
      @content = content
      @type = type.to_s
    end

    def check_text
      return Result.new(@content) if @content.blank?
      return Result.new(@content) unless CensorBear::StopWord::FIELDS.include?(@type)

      if @content.match(QQ_REG)
        CensorBear.info(@content, @type, 'BANNED', 'qq_regex')
        raise NotPassedException
      end

      if @content.match(WX_REG)
        CensorBear.info(@content, @type, 'BANNED', 'wx_regex')
        raise NotPassedException
      end

      local_check

      # 用户相关类型直接禁止创建
      raise NotPassedException if @is_mod && %w[username signature dialog nickname].include?(@type)

      Result.new(@content, @is_mod, @mod_words.uniq)
    end

    def local_check
      original_content = @content.dup
      stop_words = CensorBear::StopWord.where("#{@type} != 'IGNORE'")
      stop_words.each do |word|
        finder = Regexp.new(Regexp.escape(word.key))
        action = word.send(@type.to_sym).upcase
        next unless finder.match(@content)
        @mod_words.push(word.key)
        case action
        when 'REPLACE'
          @content = @content.gsub(finder, word.replacement)
          CensorBear.info(
            original_content, @type, action, 'local_check',
            filtered_content: @content,
            mod_words: [word.key]
          )
        when 'MOD'
          @is_mod = true
          CensorBear.info(
            original_content, @type, action, 'local_check',
            filtered_content: nil,
            mod_words: [word.key]
          )
        when 'BANNED'
          @is_mod = true
          # 禁止的直接抛出异常
          CensorBear.info(
            original_content, @type, action, 'local_check',
            filtered_content: nil,
            mod_words: [word.key]
          )
          raise NotPassedException
        end
      end
    end

    def cloud_check() end

    private

    def tencent_check() end

    def aliyun_check() end
  end
end