# defmodule BurnWeb.Telemetry do
#   use Supervisor
#   import Telemetry.Metrics

#   def start_link(arg) do
#     Supervisor.start_link(__MODULE__, arg, name: __MODULE__)
#   end

#   @impl true
#   def init(_arg) do
#     children = [
#       # Telemetry poller will execute the given period measurements
#       # every 10_000ms. Learn more here: https://hexdocs.pm/telemetry_metrics
#       {:telemetry_poller, measurements: periodic_measurements(), period: 10_000}
#       # Add reporters as children of your supervision tree.
#       # {Telemetry.Metrics.ConsoleReporter, metrics: metrics()}
#     ]

#     Supervisor.init(children, strategy: :one_for_one)
#   end

#   def metrics do
#     [
#       # Phoenix Metrics
#       summary("phoenix.endpoint.start.system_time",
#         unit: {:native, :millisecond}
#       ),
#       summary("phoenix.endpoint.stop.duration",
#         unit: {:native, :millisecond}
#       ),
#       summary("phoenix.router_dispatch.start.system_time",
#         tags: [:route],
#         unit: {:native, :millisecond}
#       ),
#       summary("phoenix.router_dispatch.exception.duration",
#         tags: [:route],
#         unit: {:native, :millisecond}
#       ),
#       summary("phoenix.router_dispatch.stop.duration",
#         tags: [:route],
#         unit: {:native, :millisecond}
#       ),
#       summary("phoenix.socket_connected.duration",
#         unit: {:native, :millisecond}
#       ),
#       sum("phoenix.socket_drain.count"),
#       summary("phoenix.channel_joined.duration",
#         unit: {:native, :millisecond}
#       ),
#       summary("phoenix.channel_handled_in.duration",
#         tags: [:event],
#         unit: {:native, :millisecond}
#       ),

#       # Database Metrics
#       summary("burn.repo.query.total_time",
#         unit: {:native, :millisecond},
#         description: "The sum of the other measurements"
#       ),
#       summary("burn.repo.query.decode_time",
#         unit: {:native, :millisecond},
#         description: "The time spent decoding the data received from the database"
#       ),
#       summary("burn.repo.query.query_time",
#         unit: {:native, :millisecond},
#         description: "The time spent executing the query"
#       ),
#       summary("burn.repo.query.queue_time",
#         unit: {:native, :millisecond},
#         description: "The time spent waiting for a database connection"
#       ),
#       summary("burn.repo.query.idle_time",
#         unit: {:native, :millisecond},
#         description:
#           "The time the connection spent waiting before being checked out for the query"
#       ),

#       # VM Metrics
#       summary("vm.memory.total", unit: {:byte, :kilobyte}),
#       summary("vm.total_run_queue_lengths.total"),
#       summary("vm.total_run_queue_lengths.cpu"),
#       summary("vm.total_run_queue_lengths.io")
#     ]
#   end

#   defp periodic_measurements do
#     [
#       # A module, function and arguments to be invoked periodically.
#       # This function must call :telemetry.execute/3 and a metric must be added above.
#       # {BurnWeb, :count_users, []}
#     ]
#   end
# end
