package flags

import (
	"os"
	"strings"

	"gopkg.in/alecthomas/kingpin.v2"
)

var (
	ListenAddress     = kingpin.Flag("listen", "Listen address - ip:port or :port").Default("0.0.0.0:80").Envar("LISTEN").String()
	CgroupRoot        = kingpin.Flag("cgroupfs-root", "The mount point of the host cgroupfs root").Default("/sys/fs/cgroup").Envar("CGROUPFS_ROOT").String()
	DisableLogParsing = kingpin.Flag("disable-log-parsing", "Disable container log parsing").Default("false").Envar("DISABLE_LOG_PARSING").Bool()
	DisablePinger     = kingpin.Flag("disable-pinger", "Don't ping upstreams").Default("false").Envar("DISABLE_PINGER").Bool()
	DisableL7Tracing  = kingpin.Flag("disable-l7-tracing", "Disable L7 tracing").Default("false").Envar("DISABLE_L7_TRACING").Bool()

	ExternalNetworksWhitelist = kingpin.Flag("track-public-network", "Allow track connections to the specified IP networks, all private networks are allowed by default (e.g., Y.Y.Y.Y/mask)").Envar("TRACK_PUBLIC_NETWORK").Strings()
	EphemeralPortRange        = kingpin.Flag("ephemeral-port-range", "Destination and Listen TCP ports from this range will be skipped").Default("32768-60999").Envar("EPHEMERAL_PORT_RANGE").String()

	Provider          = kingpin.Flag("provider", "`provider` label for `node_cloud_info` metric").Envar("PROVIDER").String()
	Region            = kingpin.Flag("region", "`region` label for `node_cloud_info` metric").Envar("REGION").String()
	AvailabilityZone  = kingpin.Flag("availability-zone", "`availability_zone` label for `node_cloud_info` metric").Envar("AVAILABILITY_ZONE").String()
	InstanceType      = kingpin.Flag("instance-type", "`instance_type` label for `node_cloud_info` metric").Envar("INSTANCE_TYPE").String()
	InstanceLifeCycle = kingpin.Flag("instance-life-cycle", "`instance_life_cycle` label for `node_cloud_info` metric").Envar("INSTANCE_LIFE_CYCLE").String()
	LogPerSecond      = kingpin.Flag("log-per-second", "The number of logs per second").Default("10.0").Envar("LOG_PER_SECOND").Float64()
	LogBurst          = kingpin.Flag("log-burst", "The maximum number of tokens that can be consumed in a single call to allow").Default("100").Envar("LOG_BURST").Int()

	CollectorEndpoint = kingpin.Flag("collector-endpoint", "A base endpoint URL for metrics, traces, logs, and profiles").Envar("COLLECTOR_ENDPOINT").URL()
	ApiKey            = kingpin.Flag("api-key", "Coroot API key").Envar("API_KEY").String()
	MetricsEndpoint   = kingpin.Flag("metrics-endpoint", "The URL of the endpoint to send metrics to").Envar("METRICS_ENDPOINT").URL()
	TracesEndpoint    = kingpin.Flag("traces-endpoint", "The URL of the endpoint to send traces to").Envar("TRACES_ENDPOINT").URL()
	LogsEndpoint      = kingpin.Flag("logs-endpoint", "The URL of the endpoint to send logs to").Envar("LOGS_ENDPOINT").URL()
	ProfilesEndpoint  = kingpin.Flag("profiles-endpoint", "The URL of the endpoint to send profiles to").Envar("PROFILES_ENDPOINT").URL()

	ScrapeInterval = kingpin.Flag("scrape-interval", "How often to gather metrics from the agent").Default("15s").Envar("SCRAPE_INTERVAL").Duration()
	WalDir         = kingpin.Flag("wal-dir", "Path to where the agent stores data (e.g. the metrics Write-Ahead Log)").Default("/tmp/coroot-node-agent").Envar("WAL_DIR").String()
)

func GetString(fl *string) string {
	if fl == nil {
		return ""
	}
	return *fl
}

func init() {
	if strings.HasSuffix(os.Args[0], ".test") {
		return
	}

	kingpin.HelpFlag.Short('h').Hidden()
	kingpin.Parse()

	if *CollectorEndpoint != nil {
		u := *CollectorEndpoint
		if *MetricsEndpoint == nil {
			*MetricsEndpoint = u.JoinPath("/v1/metrics")
		}
		if *TracesEndpoint == nil {
			*TracesEndpoint = u.JoinPath("/v1/traces")
		}
		if *LogsEndpoint == nil {
			*LogsEndpoint = u.JoinPath("/v1/logs")
		}
		if *ProfilesEndpoint == nil {
			*ProfilesEndpoint = u.JoinPath("/v1/profiles")
		}
	}

	if *MetricsEndpoint != nil {
		*ListenAddress = "127.0.0.1:10300"
	}
}