syntax = "proto2";

package frc971.analysis;

// Specification fo a Channel to pull from the logfile. The name and type will
// be the full name/type of the channel to pull from the logfile. The alias is a
// shorter, easier to type, name that the rest of the logfile will use to refer
// to the channel.
message Channel {
  optional string name = 1;
  optional string type = 2;
  optional string alias = 3;
}

// A specification for a single signal within a Channel.
message Signal {
  // Alias for the channel to pull the signal from--this should match an alias
  // specified in one of the Channels.
  optional string channel = 1;
  // Specification of the field to plot. Currently, this only supports simple
  // submessages, using dots. To access, e.g., the "bar" member of the "foo"
  // submessage, field would be "foo.bar". This does not currently support
  // working with repeated fields.
  optional string field = 2;
}

// A single line to plot.
message Line {
  // The signal to plot on the y-axis.
  optional Signal y_signal = 1;
  // If set, we will use this signal for the x-axis of the plot. By default, we
  // will use the monotonic sent time of the message. This is helpful for both
  // plotting against non-time based signals (e.g., plotting x/y robot position)
  // as well as plotting against times other than the message sent time (e.g.,
  // for the IMU where the sample capture time is separate from the actual
  // sent time.
  // Note that the x and y signals should have exactly the same number of
  // entries--otherwise, we need to write logic to handle resampling one signal
  // to a different rate.
  optional Signal x_signal = 2;
}

// Message representing a single pyplot Axes, with specifications for exactly
// which signals to show in the supplied subplot.
message Axes {
  repeated Line line = 1;
  optional string ylabel = 2;
  optional string xlabel = 3 [default = "Monotonic Time (sec)"];
  // Whether to share an x-axis with all the other axes.
  optional bool share_x_axis = 4 [default = true];
}

// Message representing a single pyplot figure.
message Figure {
  repeated Axes axes = 1;
}

// This configuration specifies what to plot when reading from a logfile.
message PlotConfig {
  // List of channels and their aliases to use in the plot.
  repeated Channel channel = 1;
  // Figures to plot.
  repeated Figure figure = 2;
}