module ThemeDoodleMatrix

# File lib/theme_doodle_matrix.rb, line 126
def binary_rain_line(width:, seed:)
  bits = %w[0 1]
  line = +""
  width.times { |index| line << bits[(seed + index) % 2] }
  line
end

# File lib/theme_doodle_matrix.rb, line 36
def bullet_dodge_panels(seed:, width: BASE_WIDTH)
  panels = [
    bullet_time_panel(width: width),
    matrix_rain_panel(width: width),
    dodge_left_panel(width: width),
    dodge_right_panel(width: width)
  ]
  panels[seed.to_i.abs % panels.length]
end

# File lib/theme_doodle_matrix.rb, line 83
def bullet_time_panel(width:)
  art = [
    "      o       *        o      *   ",
    "  *       \\ | /     o        *     ",
    "     *  --- NEO ---       o       ",
    "        / | \\    *    o       *  ",
    "   o        *        o       *    "
  ]
  fit_art(art, width: width)
end

# File lib/theme_doodle_matrix.rb, line 18
def colour_at(index)
  CLASSIC_COLOURS[index % CLASSIC_COLOURS.length]
end

# File lib/theme_doodle_matrix.rb, line 104
def dodge_left_panel(width:)
  art = [
    "  *    o      *    o      *    o  ",
    "    o     \\   |   /    *      o   ",
    "  *   o --- NEO --- *    o    *   ",
    "      /   |   \\    o      *      ",
    "  o      *     o      *     o     "
  ]
  fit_art(art, width: width)
end

# File lib/theme_doodle_matrix.rb, line 115
def dodge_right_panel(width:)
  art = [
    " *  o    *    o    *    o    *  o ",
    "   o      *  \\ | /  *    o       ",
    " *    --- NEO DODGE ---    o   *  ",
    "       / | \\  *    o      *      ",
    "  o    *    o    *    o    *    o "
  ]
  fit_art(art, width: width)
end

# File lib/theme_doodle_matrix.rb, line 133
def fit_art(lines, width:)
  lines.map do |line|
    text = line.to_s
    if text.length >= width
      text[0, width]
    else
      text.center(width)[0, width]
    end
  end
end

# File lib/theme_doodle_matrix.rb, line 60
def matrix_between_separators(width: BASE_WIDTH, count: 3, seed: 0)
  lines = []
  count.times do |index|
    panel_seed = seed + (index * 17)
    lines.concat(bullet_dodge_panels(seed: panel_seed, width: width))
    char = %w[* o | 0 1][panel_seed % 5]
    lines << char * width
    inner = width - 2
    lines << "|" + binary_rain_line(width: inner, seed: panel_seed + 3).center(inner) + "|"
  end
  lines
end

# File lib/theme_doodle_matrix.rb, line 22
def matrix_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_matrix.rb, line 73
def matrix_footer(width: BASE_WIDTH, seed: 0)
  inner = width - 2
  [
    bullet_dodge_panels(seed: seed + 23, width: width).last(2),
    "|" + binary_rain_line(width: inner, seed: seed + 31).center(inner) + "|",
    "|" + " /theme ".center(inner) + "|",
    "+" + "=" * inner + "+"
  ].flatten
end

# File lib/theme_doodle_matrix.rb, line 46
def matrix_header(tag: "TAG", width: BASE_WIDTH, seed: 0)
  inner = width - 2
  label = " #{tag} "
  rain_top = "|" + binary_rain_line(width: inner, seed: seed) + "|"
  rain_bot = "|" + binary_rain_line(width: inner, seed: seed + 11) + "|"
  [
    "+" + "=" * inner + "+",
    rain_top,
    "|" + label.center(inner) + "|",
    rain_bot,
    "+" + "-" * inner + "+"
  ] + bullet_dodge_panels(seed: seed, width: width)
end

# File lib/theme_doodle_matrix.rb, line 31
def matrix_line(text, line_index: 0, seed: 0)
  offset = (seed.to_s.bytes.sum + (line_index * 7)) % CLASSIC_COLOURS.length
  matrix_decorate(text, offset: offset)
end

# File lib/theme_doodle_matrix.rb, line 94
def matrix_rain_panel(width:)
  art = [
    "|010110101010110101011001010101010|",
    "|10101100101010101011010101011010|",
    "|<< THE MATRIX :: BULLET TIME >>|",
    "|01010110101011010101101010101101|"
  ]
  fit_art(art, width: width)
end