package srv_search

import (
	"context"
	"hkdj-web-server/pub/esmanager"
	"hkdj-web-server/pub/models/esmod"
	"time"
)

const esSyncOverlap = time.Minute

// needFullESSync 判断是否需要全量同步 ES
func needFullESSync(ctx context.Context, esIndex string) (bool, *esmod.ESRecord) {
	esRecord, serr := esmod.GetRecordTimeByESIndex(ctx, esIndex)
	if serr != nil || esRecord == nil {
		return true, esRecord
	}

	count, err := esmanager.Instance.Count(esIndex, esmanager.M{
		"query": esmanager.M{"match_all": esmanager.M{}},
	})
	if err != nil || count == 0 {
		return true, esRecord
	}

	now := time.Now()
	if (now.Hour() >= 5 && esRecord.UpdatedAt.Local().Hour() < 5) ||
		esRecord.UpdatedAt.Local().Day() < now.Day() {
		return true, esRecord
	}
	return false, esRecord
}

// esSyncSinceTime 取增量同步起点（RecordTime 优先，回退 1 分钟避免边界遗漏）
func esSyncSinceTime(esRecord *esmod.ESRecord) time.Time {
	if esRecord == nil {
		return time.Time{}
	}
	since := esRecord.RecordTime
	if since.IsZero() {
		since = esRecord.UpdatedAt
	}
	if since.IsZero() {
		return time.Time{}
	}
	return since.Add(-esSyncOverlap)
}