--[[
Copyright (C) 2013-2018 Draios Inc dba Sysdig.

This file is part of sysdig.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

--]]

--[[
USAGE: sysdig -c proc_exec_time
   eg,

   sysdig -c proc_exec_time				 # show processes that have finished
   sysdig -c proc_exec_time disable_colors" # show processes that have finished w/ no colors
   sysdig -pc -c proc_exec_time			 # show processes that have finished and container output
--]]

-- Chisel description
description = "List the processes that have finished running, along with their execution time, and color every line based on the total process run time (Green|Blue below thresholds, Yellow at 3 sec, and Red at 10 sec). This chisel is compatible with containers using the sysdig -pc or -pcontainer argument, otherwise no container information will be shown. (Blue represents a process running within a container, and Green represents a host process)";
short_description = "Show process execution time";
category = "Performance";

-- Chisel argument list
args =
{
	{
		name = "disable_color",
		description = "Set to 'disable_colors' if you want to disable color output",
		argtype = "string",
		optional = true
	},
}

require "common"
terminal = require "ansiterminal"
terminal.enable_color(true)

local THRESHOLD_YELLOW_NS = 3000000000
local THRESHOLD_RED_NS = 10000000000

-- Argument notification callback
function on_set_arg(name, val)
	if val == "disable_colors" then
		terminal.enable_color(false)
	end
	return true
end

-- Initialization callback
function on_init()
	-- Request the fields that we need
	fetype = chisel.request_field("evt.type")
	fexe = chisel.request_field("proc.name")
	fargs = chisel.request_field("proc.args")
	fdtime = chisel.request_field("evt.time.s")
	fduration = chisel.request_field("proc.duration")
	fcontainername = chisel.request_field("container.name")
	fcontainerid = chisel.request_field("container.id")

	-- The -pc or -pcontainer options was supplied on the cmd line
	print_container = sysdig.is_print_container_data()

	-- set the filter
	chisel.set_filter("evt.type=procexit")

	-- The -pc or -pcontainer options was supplied on the cmd line
	if print_container then
		print(string.format("%-13.13s %-20.20s %-20.20s %-12.12s %s",
							"proc.duration",
							"container.id",
							"container.name",
							"proc.name",
							"proc.args"))
		print(string.format("%-13.13s %-20.20s %-20.20s %-12.12s %s",
							"-------------",
							"--------------------",
							"--------------------",
							"------------",
							"--------------------"))
	else
		print(string.format("%-13.13s %-12.12s %s",
							"proc.duration",
							"proc.name",
							"proc.args"))
		print(string.format("%-13.13s %-12.12s %s",
							"-------------",
							"------------",
							"--------------------"))
	end

	return true
end

-- Event parsing callback
function on_event()
	local dtime = evt.field(fdtime)
	local duration = evt.field(fduration)

	if duration ~= nil then
		local color = terminal.green

		if duration > THRESHOLD_RED_NS then
			color = terminal.red
		elseif duration > THRESHOLD_YELLOW_NS then
			color = terminal.yellow
		elseif evt.field(fcontainername) ~= "host" then
			-- if the data is associated with a container change the color to blue unless a threshold is met
			color = terminal.blue
		end

		-- The -pc or -pcontainer options was supplied on the cmd line
		if print_container then
			print(color .. string.format("%-13.13s %-20.20s %-20.20s %-12.12s %s",
										 format_time_interval(duration),
										 evt.field(fcontainerid),
										 evt.field(fcontainername),
										 evt.field(fexe),
										 evt.field(fargs)))
		else
			print(color .. string.format("%-13.13s %-12.12s %s",
										 format_time_interval(duration),
										 evt.field(fexe),
										 evt.field(fargs)))
		end
	end

	return true
end

-- Called by the engine at the end of the capture (Ctrl-C)
function on_capture_end()
	print(terminal.reset)
end
