module ThemeDoodle

# File lib/theme_doodle.rb, line 27
def colour_at(index)
  cycle = colour_cycle
  cycle[index % cycle.length]
end

# File lib/theme_doodle.rb, line 18
def colour_cycle
  @colour_cycle ||= begin
    require_relative "irc_extended_colors"
    vivid = IrcExtendedColors.codes_for_group(:vivid)
    pastel = IrcExtendedColors.codes_for_group(:pastel)
    (vivid + pastel).freeze
  end
end

# File lib/theme_doodle.rb, line 50
def fserver_banner(tag: "TAG", width: FSERVE_WIDTH)
  inner = width - 2
  label = " #{tag} "
  slot = IrcAscii.fserve_slot(label: tag, width: width)
  [
    slot[0],
    "|" + label.center(inner) + "|",
    "+" + "=" * inner + "+"
  ]
end

# File lib/theme_doodle.rb, line 71
def fserver_footer(width: FSERVE_WIDTH)
  inner = width - 2
  [
    "|" + " /theme ".center(inner) + "|",
    "+" + "-" * inner + "+",
    IrcAscii.nick_bar(width: [width / 2, 20].max)
  ]
end

# File lib/theme_doodle.rb, line 61
def fserver_separators(width: FSERVE_WIDTH, count: 3)
  lines = []
  count.times do |index|
    char = SEPARATOR_CHARS[index % SEPARATOR_CHARS.length]
    lines << char * width
    lines << ("+" + char * (width - 2) + "+")
  end
  lines
end

# File lib/theme_doodle.rb, line 46
def ibis_rainbow_line(text, line_index: 0, seed: 0)
  rainbow_line(text, line_index: line_index, seed: seed + 7)
end

# File lib/theme_doodle.rb, line 32
def rainbow_decorate(text, offset: 0)
  text.to_s.chars.map.with_index do |ch, index|
    next ch if ch == " "

    fg = colour_at(offset + index)
    "#{IrcFormat.color(fg)}#{ch}#{IrcFormat::RESET}"
  end.join
end

# File lib/theme_doodle.rb, line 41
def rainbow_line(text, line_index: 0, seed: 0)
  offset = (seed.to_s.bytes.sum + (line_index * 11)) % colour_cycle.length
  rainbow_decorate(text, offset: offset)
end