require 'helpers'

# Created as an "ad hoc" lib for generating the README

module Tutorial
  include Livetext::Helpers

  def title(args = nil, body = nil)
    h1
    _optional_blank_line
  end

  def section(args = nil, body = nil)
    h3
    _optional_blank_line
  end

  def code(args = nil, body = nil)
    first = true  # dumb hack! fixes blank space
    _body do |line| 
      tag, first = "<pre>", false if first
      _out "#{tag}   #{escape_html(line)}"   # indentation
    end
    _out "</pre>"
    _optional_blank_line
  end

  def rx(str)
    ::Regexp.compile(::Regexp.escape(str))
  end

  def inout(args = nil, body = nil)
    src, out = _args
    t1 = ::File.readlines(src) rescue (abort "t1 = #{src}")
    t2 = ::File.readlines(out) rescue (abort "t2 = #{out}")
    # To pacify markdown for README (FIXME later)
    t1 = t1.map {|x| " " + x.sub(/ +$/,"").gsub(/_/, "\\_") }.join
    t2 = t2.map {|x| " " + x.sub(/ +$/,"").gsub(/_/, "\\_") }.join

    _out <<-HTML
      <table width=80% cellpadding=4>
      <tr>
        <td width=50%><b>Input</b></td>
        <td width=50%><b>Output</b></td>
      </tr>
      <tr>
        <td width=50% bgcolor=#fee0fe valign=top>
          <pre>#{t1}</pre>
        </td>
        <td width=50% bgcolor=#eeeeee valign=top>
          <pre>#{t2}</pre>
        </td>
      </tr>
      </table>
    HTML
    _optional_blank_line
  end

  def put_table(src, exp)
    t1 = ::File.readlines(src) rescue (abort "t1 = #{src}")
    t2 = ::File.readlines(exp) rescue (abort "t2 = #{out}")
    t1 = t1.map {|x| " " + x.sub(/ +$/,"").gsub(/_/, "\\_") }.join
    t2 = t2.map {|x| " " + x.sub(/ +$/,"").gsub(/_/, "\\_") }.join

    _out <<-HTML
      <font size=+1>
      <table width=80% cellpadding=4>
      <tr>
        <td width=50%><b>Input</b></td>
        <td width=50%><b>Output</b></td>
      </tr>
      <tr>
        <td width=50% bgcolor=#fee0fe valign=top>
          <pre>#{t1}</pre>
        </td>
        <td width=50% bgcolor=#eeeeee valign=top>
          <pre>#{t2}</pre>
        </td>
      </tr>
      </table>
      </font>
    HTML
  end

  def testcase(args = nil, body = nil)
    name = _args.first
    _out "\n<font size=+1><b>Test: </font><font size=+2><tt>#{name}</tt></font></b></h3><br>"
    src, exp = "test/snapshots/#{name}/source.lt3", "test/snapshots/#{name}/expected-output.txt"
    @_args = [src, exp]   # Better way to do this??
    put_table(src, exp)
    _out "<br>"
    _optional_blank_line
  end
end