# -*- coding: utf-8 -*-
require 'cinch'
require 'cinch/toolbox'
require 'cinch-cooldown'

module Cinch::Plugins
  class Magic
    include Cinch::Plugin

    enforce_cooldown

    self.help = "Use .mtg <card name> to see the info for that card."

    match /mtg (.*)/

    def execute(m, term)
      m.reply get_card(term)
    end

    private

    def get_card(term)
      # Fetch the html for the search term
      data = get_card_data(term)

      # Catch nil responses.
      return '[Magic] Card not found, or problem fetching page.' if data.nil?

      # Build card string
      card = "#{get_card_name(data)} [#{get_card_info(data)}] - #{get_card_text(data)}"

      # Truncate if it's super long
      card = Cinch::Toolbox.truncate(card, 300)

      return "[Magic] #{card} [#{get_card_link(data)}]"
    end

    def get_card_info(data)
      text = data[/<p[^>]*>([^<]+)<\/p>/, 1]

      # Replace Newlines, unicode lines, total mana, and large spaces.
      text = text.gsub(/\n/, '')
      text = text.gsub(/\s—/, ', ')
      text = text.gsub(/\s\(\d*\)/, '')
      text = text.gsub(/\s{2,}/, ' ')

      # Remove pesky whitespace that might have snuck in...
      text.strip!

      return text
    rescue
      debug "Error getting this card's info"
    end

    def get_card_name(data)
      return data[/<a href=[^>]*>([^<]+)<\/a>/, 1]
    rescue
      debug "Error finding this card's name"
    end

    def get_card_link(data)
      return "http://magiccards.info" + data.match(/<a href="([^>]*)">[^<]+<\/a>/)[1]
    rescue
      debug "Error finding this card's url"
    end

    def get_card_text(data)
      return data.match(/<p class="ctext"><b[^>]*>(.+)<\/b><\/p>/)[1].gsub(/<br><br>/, ' ')
    rescue
      debug "Error finding this card's description"
    end

    def get_card_data(term)
      # URI Encode the term and build the URL
      term = URI.escape("!#{term}", Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))
      url = "http://magiccards.info/query?q=#{term}"

      # Make sure the URL is legit
      url = URI::extract(url, ["http", "https"]).first

      # Grab the html block because magiccards.info fucking loves tables
      # and hates helpful ids and classnames
      return Cinch::Toolbox.get_html_element(url, '//table[3]/tr/td[2]', :xpath_full)

    rescue
      debug "Error looking up card: #{term}"
      return nil
    end
  end
end