require 'curses'
require 'iconv'
include Curses

class CursesController
  include EntriesController
  include FeedsController
  include EntryController

  def log(statement)
    LOGGER.debug(statement)
  end

  def show_help(text)
    @command_window.escape_help_prompt
    @help_window = Curses::Window.new(@scr.maxy - 4, @scr.maxx, 0, 0) 
    @text_area = Curses::Window.new(@scr.maxy - 4, @scr.maxx - 4, 2, 5)  
    @help_window.clear
    @text_area.addstr(PREAMBLE)
    @text_area.addstr(text)
    @text_area.addstr(FOOTER)
    @help_window.refresh
    @text_area.refresh
    @scr.getch
    @text_area.close
    @help_window.close
  end

  PREAMBLE = <<END
FastReader Terminal Feed Reader Command Reference

END

  FOOTER = <<END

                                      by Daniel Choi, June 2008
                                      Cambridge, Massachusetts, USA
                                      dhchoi@gmail.com

END


  FEEDS_MENU_COMMANDS = <<-END
Feed Menu Navigation

The standard Vi bindings h, j, k, l move left, down, up, and right. You can
also use the arrow keys. Right in this case drills down the hierachy
(goes from the feed list to the entry list for a feed to an entry), while
left goes back up the hierarchy.

You can prefix a up or down movement command with a number to go that many
steps in that direction.

CTRL-f                    Page down
CTRL-b                    Page up
H                         Move to top of screen
M                         Move to top middle of screen 
L                         Move to bottom of screen
G                         Move to last item
1G                        Move to first item
l, RIGHT ARROW, RETURN    Select a feed and display its entries

You can also type the feed's number and press RETURN or RIGHT ARROW to select
it.

Actions

q       Quit the program
u       Updates the feed; won't update with last update was within the last hour
U       Forces an update of the feed
CTRL-u  Updates all feeds
        * It's better to update the feeds from the command line because the
        feedback if easier to follow. Use the command 'fastreader update'.
d       Deletes the feed. This will also delete any flagged items from this feed.
a       Adds a feed; enter the url of the webpage with a feed autodiscovery link
        or the URL of the feed itself
/       Start a global search; asks for a search string and will find all entry
        items in the database that match

  END

  ENTRIES_MENU_COMMANDS = <<-END
Feed Items Navigation

The standard Vi bindings h, j, k, l move left, down, up, and right. You can
also use the arrow keys. Right in this case drills down the hierachy
(goes from the feed list to the item list for a feed to an item), while
left goes back up the hierarchy.

You can prefix a up or down movement command with a number to go that many
steps in that direction.

CTRL-f  Page down
CTRL-b  Page up
H       Move to top of screen
M       Move to top middle of screen 
L       Move to bottom of screen
G       Move to last item
1G      Move to first item
l, RIGHT ARROW, RETURN    Select an item and display its content

Actions

q     Quit the program
/     Start a local search of the item titles. This lets you jump to a
      particular item quickly. 
s, *  Flag an item. Flagged items appears in a virtual feed called
      "Flagged Entries."
A     Flag all items in the list
Z     Unflag all items in the list
D     Delete all the items from the cursor position downward. Flagged items will
      be preserved.
u     Updates the feed; won't update with last update was within the last hour
U     Forces an update of the feed
  END

  ENTRY_PAGE_COMMANDS = <<-END
Feed Item Content Navigation

j, DOWN ARROW, CTRL-f     Page down (if there is more than one page)
k, UP ARROW, CTRL-b       Page up 
h, LEFT ARROW             Go back to entries list
l, RIGHT ARROW, RETURN    Go to the web page linked to this entry. 

By default, the command to open the web browser is "open {url}." This works out
of the box on Mac OS X. You can change this command by setting your shell's
FASTREADER_WEB environmental variable. Currently, in-terminal text browsers like
elinks do not work with Fastreader.  Hopefully this will change.


>, .  Go to next entry in the list
<, ,  Go to previous entry in the list

Actions

q     Quit the program
s, *  Flag an entry. Flagged entries appears in a virtual feed called
      "Flagged Entries."
\\     Show raw entry content markup

  END

  def initialize(formatter)
    # Formatter is the Display class. Should change the variable names to match the class
    # names or vice versa.
    @formatter = formatter
    @scr = init_screen
    noecho
    cbreak
    Color.init
    curs_set(0)
    @scr.keypad = true
    log "Screen width: #{@scr.maxx} | Screen height: #{@scr.maxy}."
    log "Command window initilized."
  end

  def key_buffer(initial_char)
    c = initial_char
    buffer = []
    printable = (33..126).to_a
    while printable.include?(c) && c.chr =~ /\d/
      LOGGER.debug("detecting a multiplier: #{c.chr}")
      # TODO This code doesn't work right
      buffer << c.chr.to_i
      c = @scr.getch
    end
    return c, buffer
  end

  def control_key(character)
    character[0] - 64
  end

end