class BotConsole::LogBuffer

# File lib/bot_console/log_buffer.rb, line 15
def initialize(capacity: DEFAULT_CAPACITY, log_path: nil)
  @capacity = capacity
  @mutex = Mutex.new
  @lines = []
  @scroll_offset = 0
  @log_file = log_path ? LogFile.new(log_path) : nil
  @full_lines_cache = nil
end

# File lib/bot_console/log_buffer.rb, line 24
def append(line)
  condensed = LogLine.condense(line)
  return if condensed.nil? || condensed.empty?

  @mutex.synchronize do
    @lines << condensed
    @lines.shift while @lines.length > @capacity
    @log_file&.append(condensed)
    invalidate_file_cache!
    @scroll_offset = 0 if @scroll_offset.zero?
  end
end

# File lib/bot_console/log_buffer.rb, line 37
def lines
  backing_lines
end

# File lib/bot_console/log_buffer.rb, line 89
def scroll_bottom
  @mutex.synchronize { @scroll_offset = 0 }
end

# File lib/bot_console/log_buffer.rb, line 73
def scroll_by(delta, height)
  @mutex.synchronize do
    all = backing_lines_locked
    max_offset = [all.length - height, 0].max
    @scroll_offset = [[@scroll_offset + delta, 0].max, max_offset].min
  end
end

# File lib/bot_console/log_buffer.rb, line 58
def scroll_state(height)
  @mutex.synchronize do
    total = total_line_count_locked
    max_offset = [total - height, 0].max
    at_tail = @scroll_offset <= 0
    {
      total: total,
      offset: @scroll_offset,
      max_offset: max_offset,
      at_tail: at_tail,
      archives: @log_file&.archive_count.to_i
    }
  end
end

# File lib/bot_console/log_buffer.rb, line 81
def scroll_top(height)
  @mutex.synchronize do
    all = backing_lines_locked
    max_offset = [all.length - height, 0].max
    @scroll_offset = max_offset
  end
end

# File lib/bot_console/log_buffer.rb, line 54
def scrolled_up?
  @mutex.synchronize { @scroll_offset.positive? }
end

# File lib/bot_console/log_buffer.rb, line 41
def visible_lines(height)
  all = backing_lines
  return [] if height <= 0

  @mutex.synchronize do
    max_offset = [all.length - height, 0].max
    @scroll_offset = [[@scroll_offset, 0].max, max_offset].min
    start = all.length - height - @scroll_offset
    start = 0 if start.negative?
    all[start, height] || []
  end
end