package observability

import "runtime"

var methods = []string{"GET", "POST", "PATCH", "PUT", "DELETE", "HEAD", "OPTIONS", "OTHER"}
var routes = []string{"health_live", "health_ready", "worker_connect", "event_connect", "tasks", "queues", "workflows", "workflow_definitions", "schedules", "subscriptions", "application_resources", "other"}
var statusClasses = []string{"1xx", "2xx", "3xx", "4xx", "5xx", "other"}
var components = []string{"workflow", "schedule", "execution_recovery"}

// Every exported family is declared here, including each allowed label value.
// Adding a metric therefore requires a code review; no user identifier is valid.
func catalog() map[string]descriptor {
	httpLabels := map[string][]string{"method": methods, "route": routes, "status_class": statusClasses}
	c := map[string]descriptor{
		"orbit_http_requests_total":                          {counter, "Completed HTTP responses, including successful upgrade handshakes", httpLabels},
		"orbit_http_request_duration_seconds":                {histogram, "HTTP response or upgrade handshake duration in seconds", httpLabels},
		"orbit_http_requests_in_flight":                      {gauge, "HTTP handlers before completion or successful hijack", nil},
		"orbit_http_panics_total":                            {counter, "HTTP handlers which panicked, before or after upgrade", nil},
		"orbit_websocket_connections":                        {gauge, "Upgraded WebSocket handlers currently active", map[string][]string{"route": {"worker_connect", "event_connect"}}},
		"orbit_websocket_connections_total":                  {counter, "Successful WebSocket upgrades", map[string][]string{"route": {"worker_connect", "event_connect"}}},
		"orbit_runtime_batch_total":                          {counter, "Completed background batches by outcome", map[string][]string{"component": components, "outcome": {"success", "error", "cancelled"}}},
		"orbit_runtime_batch_duration_seconds":               {histogram, "Background batch duration in seconds", map[string][]string{"component": components}},
		"orbit_runtime_batch_last_success_timestamp_seconds": {gauge, "Unix time of last successful background batch, zero before first success", map[string][]string{"component": components}},
		"orbit_process_start_time_seconds":                   {gauge, "Unix time when the Orbit metrics registry was started", nil},
		"orbit_process_uptime_seconds":                       {gauge, "Monotonic elapsed time since metrics registry startup", nil},
		"orbit_go_goroutines":                                {gauge, "Current Go goroutine count", nil},
		"orbit_build_info":                                   {gauge, "Orbit Go runtime build information", map[string][]string{"go_version": {runtime.Version()}}},
	}
	for name, help := range map[string]string{
		"open": "Open MySQL connections", "in_use": "MySQL connections currently in use", "idle": "Idle MySQL connections", "max_open": "Configured maximum open MySQL connections",
	} {
		c["orbit_db_connections_"+name] = descriptor{gauge, help, nil}
	}
	c["orbit_db_wait_count_total"] = descriptor{counter, "Cumulative waits for a MySQL connection", nil}
	c["orbit_db_wait_duration_seconds_total"] = descriptor{counter, "Cumulative seconds waiting for a MySQL connection", nil}
	return c
}