package api

import (
	"encoding/json"
	"errors"
	"fmt"
	"math"
	"strconv"
	"strings"
	"time"

	"github.com/minio/minio/internal/config"
	"github.com/minio/pkg/v2/env"
)

// API sub-system constants
const (
	apiRequestsMax             = "requests_max"
	apiRequestsDeadline        = "requests_deadline"
	apiClusterDeadline         = "cluster_deadline"
	apiCorsAllowOrigin         = "cors_allow_origin"

func updateDriveIOStats(currentStats madmin.DiskIOStats, latestStats madmin.DiskIOStats, labels map[string]string) {
	sectorSize := uint64(512)
	kib := float64(1 << 10)
	diffInSeconds := time.Now().UTC().Sub(lastDriveStatsRefresh).Seconds()
	if diffInSeconds == 0 {
		// too soon to update the stats
		return
	}
	diffStats := getDiffStats(latestStats, currentStats)

		return false
	}

	if len(ef.Name) > 0 && !wildcard.Match(ef.Name, obj.Name) {
		return false
	}
	if ef.OlderThan > 0 && now.Sub(obj.ModTime) <= ef.OlderThan {
		return false
	}

	if ef.CreatedBefore != nil && !obj.ModTime.Before(*ef.CreatedBefore) {
		return false
	}

	if len(ef.Tags) > 0 && !obj.DeleteMarker {

		}
	}
	return nil
}

// Help - return sub-system level help
type Help struct {
	SubSys          string         `json:"subSys"`
	Description     string         `json:"description"`
	MultipleTargets bool           `json:"multipleTargets"`
	KeysHelp        config.HelpKVS `json:"keysHelp"`
}

// GetHelp - returns help for sub-sys, a key for a sub-system or all the help.

	register := func(manager *Manager) {
		errFatal(handler.Register(manager, func(ctx context.Context, pp *testRequest, in <-chan *testRequest, out chan<- *testResponse) *RemoteErr {
			sub := GetSubroute(ctx)
			if sub != "subroute/1" {
				t.Fatal("expected subroute/1, got", sub)
			}
			n := 0
			for i := range in {
				if n > payloads {
					panic("too many requests")
				}

				// t.Log("Got request:", *i)

	var downloadURL string
	if lrTime.After(currentReleaseTime) {
		older = lrTime.Sub(currentReleaseTime)
		downloadURL = getDownloadURL(releaseTimeToReleaseTag(lrTime))
	}

	updateMsg := prepareUpdateMessage(downloadURL, older)
	if updateMsg == "" {
		return
	}

	logger.Info(prepareUpdateMessage("Run `mc admin update ALIAS`", lrTime.Sub(currentReleaseTime)))
}

	}

	// Pass in relative days from current time, to additionally
	// to verify "object-lock-remaining-retention-days" policy if any.
	days := int(math.Ceil(math.Abs(objRetention.RetainUntilDate.Sub(t).Hours()) / 24))

	ret := objectlock.GetObjectRetentionMeta(oi.UserDefined)
	if ret.Mode.Valid() {
		// Retention has expired you may change whatever you like.
		if ret.RetainUntilDate.Before(t) {

				if atomic.LoadInt32(&c.connected) == closed {
					return
				}
				if c.HealthCheckFn() {
					if atomic.CompareAndSwapInt32(&c.connected, offline, online) {
						now := time.Now()
						disconnected := now.Sub(c.LastConn())
						logger.Event(context.Background(), "healthcheck", "Client '%s' re-connected in %s", c.url.String(), disconnected)
						atomic.StoreInt64(&c.lastConn, now.UnixNano())
					}
					return
				}

	if p.Pools[idx].Decommission == nil {
		return false, errInvalidArgument
	}
	now := UTCNow()
	if now.Sub(p.Pools[idx].LastUpdate) >= duration {
		if serverDebugLog {
			console.Debugf("decommission: persisting poolMeta on drive: threshold:%s, poolMeta:%#v\n", now.Sub(p.Pools[idx].LastUpdate), p.Pools[idx])
		}
		p.Pools[idx].LastUpdate = now
		if err := p.save(ctx, pools); err != nil {

	}

	requestTimeStr := r.Header.Get("X-Minio-Time")
	requestTime, err := time.Parse(time.RFC3339, requestTimeStr)
	if err != nil {
		return errMalformedAuth
	}
	utcNow := UTCNow()
	delta := requestTime.Sub(utcNow)
	if delta < 0 {
		delta *= -1
	}
	if delta > DefaultSkewTime {
		return errSkewedAuthTime
	}

	return nil
}

// IsAuthValid - To authenticate and verify the time difference.