module RabbotMetaColorsThemes

# File lib/rabbot_meta_colors_themes.rb, line 75
def format_spectrum
  body = SPECTRUM_BANDS.map do |group, from, to|
    codes = (from..to).to_a
    swatches = codes.map { |code| "#{IrcExtendedColors.swatch(code)}#{code}" }.join(" ")
    label = IrcExtendedColors.group_label(group)
    "#{label} #{from}–#{to}: #{swatches}"
  end

  IrcReply.card(
    tag: IRC_TAG,
    title: "Spectrum 49–98",
    body_lines: body,
    footer_parts: ["#{IrcExtendedColors.spectrum_codes.length} colours", "purple shades → greyscale"],
    heading_style: STYLE_TITLE
  )
end

# File lib/rabbot_meta_colors_themes.rb, line 53
def format_theme_palette(theme_id, catalog: ThemeCatalog)
  theme = catalog.get(theme_id)
  return nil unless theme

  palette = theme[:palette] || {}
  body = PALETTE_SLOTS.filter_map do |slot|
    pair = palette[slot]
    next unless pair

    palette_row(slot.to_s, Array(pair))
  end
  extended = theme_uses_extended?(palette) ? "extended" : "classic"

  IrcReply.card(
    tag: IRC_TAG,
    title: "Theme — #{theme[:name]}",
    body_lines: body,
    footer_parts: [extended, "!theme use #{theme[:id]}"],
    heading_style: STYLE_TITLE
  )
end

# File lib/rabbot_meta_colors_themes.rb, line 30
def format_themes_list(catalog: ThemeCatalog)
  rows = catalog.all.map do |theme|
    extended = theme_uses_extended?(theme[:palette]) ? "extended" : "classic"
    {
      label: theme[:id],
      value: "#{theme[:name]} (#{extended})"
    }
  end
  body = TextAlign.format_colon_rows(rows).take(MAX_THEME_LIST_LINES)
  total = catalog.all.length

  IrcReply.card(
    tag: IRC_TAG,
    title: "Built-in theme palettes",
    body_lines: [
      *body,
      "Apply with !theme use <id> — paint rules use palette slots below."
    ],
    footer_parts: ["#{total} themes", "!rabbot colors neon"],
    heading_style: STYLE_TITLE
  )
end

# File lib/rabbot_meta_colors_themes.rb, line 105
def pair_slot_marker(fg, bg)
  fg_i = fg.to_i
  if bg.nil?
    return IrcExtendedColors.extended?(fg_i) ? "(fixed)" : "(classic)"
  end

  bg_i = bg.to_i
  if IrcExtendedColors.extended?(fg_i) && IrcExtendedColors.extended?(bg_i)
    "(fixed)"
  elsif !IrcExtendedColors.extended?(fg_i) && !IrcExtendedColors.extended?(bg_i)
    "(classic)"
  else
    "(mixed)"
  end
end

# File lib/rabbot_meta_colors_themes.rb, line 92
def palette_row(label, pair)
  fg = pair[0]
  bg = pair[1]
  marker = pair_slot_marker(fg, bg)
  if bg
    swatch = IrcExtendedColors.swatch(fg, bg: bg)
    "#{label}: #{swatch} #{fg},#{bg} #{marker}"
  else
    swatch = IrcExtendedColors.swatch(fg)
    "#{label}: #{swatch} #{fg} #{marker}"
  end
end

# File lib/rabbot_meta_colors_themes.rb, line 121
def theme_uses_extended?(palette)
  Array(palette&.values).flatten.any? { |code| code.to_i >= IrcExtendedColors::EXTENDED_MIN }
end