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# Stats about a single log
class Log
  # Load a file and parse every line as a print.
  def self.parse(file_path)
    Log.new(file_path, File.readlines(file_path))
  end

              # Number of lines in the file and number of lines that are valid CATS prints
  attr_reader :linecount,     :cats_linecount,
              # Number of characters that are in the file, part of CATS prints and part of CATS header overhead, respectively
              :charcount,     :cats_charcount,  :cats_header_charcount,
              # Hash of trace symbols and trace lines, by symbol name/line identifier, and list of TracePrints
              :symbols,       :lines,           :prints,
              # Name of the log
              :name

  def initialize(log_name, log_lines = [])
    @name       = log_name
    @linecount  = @cats_linecount = @charcount = @cats_charcount = @cats_header_charcount = 0
    @symbols    = {}
    @lines      = {}
    @prints     = []
    log_lines.each { |line| self << line }
  end

  # Add prints to this log, accepts either strings, TraceLines or TracePrints, or an array of these things
  def <<(trace_line_or_print)
    trace_print = nil

    if trace_line_or_print.is_a? TraceLine              # TraceLine
      # Add all the prints
      self << trace_line_or_print.trace_prints
      return nil
    elsif trace_line_or_print.is_a? Array               # Array
      trace_line_or_print.each do |print|
        self << print
      end
      rerturn nil
    elsif trace_line_or_print.is_a? TracePrint          # TracePrint
      trace_print = trace_line_or_print
    else                                                # String or others
      # It's not a TracePrint, trying making one
      if TracePrint.cats? trace_line_or_print
        trace_print = TracePrint.new(trace_line_or_print)
      else # Not a CATS print or a corrupted print
        @linecount += 1
        @charcount += trace_line_or_print.to_s.length
        return nil
      end
    end

    # Beyond this points, trace_print is certainly a TracePrint

    @linecount              += 1
    @charcount              += trace_print.to_s.length
    @cats_linecount         += 1
    @cats_charcount         += trace_print.to_s.length
    @cats_header_charcount  += trace_print.to_s.length - trace_print.payload.length

    @lines[trace_print.trace_line]     ||= TraceLine.new(trace_print.trace_symbol, trace_print.line)
    @symbols[trace_print.trace_symbol] ||= TraceSymbol.new(trace_print.trace_symbol)
    @symbols[trace_print.trace_symbol] << trace_print
    @lines[trace_print.trace_line]     << trace_print
    @prints                            << trace_print

    nil
  end

  # Combine two logs
  def +(log)
    raise "TODO"
  end
end

# Stats about specific trace symbol
class TraceSymbol
  attr_reader :name, :lines, :prints, :charcount

  def initialize(trace_symbol)
    @name       = trace_symbol
    @charcount  = 0
    @lines      = {}
    @prints     = []
  end

  def <<(trace_print)
    @lines[trace_print.trace_line]     ||= TraceLine.new(trace_print.trace_symbol, trace_print.line)
    @lines[trace_print.trace_line]     << trace_print
    @prints                            << trace_print
    @charcount                         += trace_print.to_s.length
  end

  def +(trace_symbol)
    raise "TODO"
  end
end

# Stats about specific TraceXxx calls
class TraceLine
  attr_reader :symbol, :line, :trace_line, :prints, :charcount

  alias :name :trace_line

  def initialize(symbol, line)
    @symbol     = symbol
    @line       = line
    @charcount  = 0
    @trace_line = "%s:%04d" % [@symbol, @line]
    @prints     = []
  end

  def <<(trace_print)
    @prints     << trace_print
    @charcount  += trace_print.to_s.length
  end

  def +(trace_line)
    raise "TODO"
  end
end

class TracePrint
  # A5 00090.005.621    euApp:         382 /ceapsubtitle_m(01077) SUBTITLE:  type = Digital
  LEGACY_CATS = %r{
    (?<cpu>      [AP]){0}
    (?<level>    \d){0}
    (?<timestamp>\d{5}\.\d{3}.\d{3}){0}
    (?<process>  [^:]+){0}
    (?<thread_id>[^ ]+){0}
    (?<symbol>   [^\(]+){0}
    (?<line>     \d+){0}
    (?<payload>  .*){0}

    \g<cpu>\g<level>\s\g<timestamp>\s+\g<process>:\s*\g<thread_id>\s+\g<symbol>\(\g<line>\)\s*\g<payload>
  }x

  # 5P23.46451  plfapp:455  /legacy/printf:0000 ##papi_mute_smt_MuteOutputs ## outputs=0x00 OutputsMuted = 0x00
  MODERN_CATS = %r{
    (?<cpu>      [AP]){0}
    (?<level>    \d){0}
    (?<timestamp>\d+\.\d{5}){0}
    (?<process>  [^:]+){0}
    (?<thread_id>\d+){0}
    (?<symbol>   [^:]+){0}
    (?<line>     \d+){0}
    (?<payload>  .*){0}

    \g<level>\g<cpu>\g<timestamp>\t+\g<process>:\g<thread_id>\t+\g<symbol>:\g<line>\t*\g<payload>
  }x

  def self.cats?(cats_print)
    cats_print && not(cats_print[LEGACY_CATS].nil? && cats_print[MODERN_CATS].nil?)
  end

  def initialize(cats_print)
    raise Error.new("#{cats_prints.inspect} is not a CATS prints.") unless TracePrint.cats?(cats_print)

    match = LEGACY_CATS.match(cats_print) || MODERN_CATS.match(cats_print)
    # Filter out second dot from timestamp for legacy prints
    @time         = match[:timestamp].sub(/\.(\d\d\d)$/, '\1')
    @line         = match[:line].to_i
    @trace_symbol = match[:symbol]
    @trace_line   = "%s:%04d" % [@trace_symbol, @line]
    @payload      = match[:payload]
    @cpu          = match[:cpu]
    @level        = match[:level]
    @process      = match[:process]
    @thread_id    = match[:thread_id]
    @payload      = match[:payload]
    @raw          = match.to_s
  end

  attr_reader :time, :trace_line, :line, :trace_symbol, :payload, :thread_id, :process, :cpu, :level, :raw

  def to_s
    @raw.clone
  end
end