# frozen_string_literal: true

class WordsController < ApplicationController
  def index
    @stats = {
      total:    Word.count,
      unseen:   Review.where(status: "new").count,
      known:    Review.where(status: "known").count,
      learning: Review.where(status: "learning").count,
      skipped:  Review.where(status: "skipped").count,
      due:      Review.due.count
    }
    @words = Word.includes(:review).by_text
  end

  def create
    raw   = params[:word_list].to_s.strip
    lines = raw.split("\n").map(&:strip).reject { |l| l.blank? || l.start_with?("#") }

    imported = 0
    skipped  = 0

    lines.each do |line|
      text, definition = parse_line(line)
      next if text.blank?

      w = Word.new(text: text.strip, definition: definition&.strip.presence)
      if w.save
        imported += 1
      else
        skipped += 1
      end
    end

    flash[:notice] = "Imported #{imported} word#{"s" unless imported == 1}."
    flash[:alert]  = "Skipped #{skipped} (duplicates or invalid)." if skipped > 0
    redirect_to words_path
  end

  def destroy
    Word.find(params[:id]).destroy
    redirect_to words_path, notice: "Removed."
  end

  private

  def parse_line(line)
    # "word - definition", "word: definition", "word | definition", "word\tdefinition"
    if (m = line.match(/\A(.+?)\s*(?:\t|-{1,2}|:{1,2}|\|)\s*(.+)\z/))
      [ m[1], m[2] ]
    else
      [ line, nil ]
    end
  end
end