package business

import (
	"context"
	"kra/internal/biz/business"
)

func (r *dashboardRepo) events(ctx context.Context, scope business.AnalyticsScope, sources []string, w business.DashboardWindow, out *business.DashboardData) error {
	out.EventsAvailable = true
	for _, source := range eventSources(sources) {
		db, err := r.databases.Database(source)
		if err != nil || db == nil {
			out.EventsAvailable = false
			continue
		}
		db = db.WithContext(ctx)
		ok, err := businessTableAvailable(db, "tab_promote_business_event")
		if err != nil {
			return err
		}
		if !ok {
			out.EventsAvailable = false
			continue
		}
		var coverage []channelEventPO
		if err := db.Where("kind='coverage'").Order("occurred_at,id").Limit(1).Find(&coverage).Error; err != nil {
			return business.ErrActivationSource
		}
		if len(coverage) > 0 && w.PreviousBegin.Before(coverage[0].OccurredAt) {
			out.EventsAvailable = false
			out.EventsIncomplete = true
		}
		q := db.Model(&channelEventPO{}).Where("kind IN ? AND occurred_at>=? AND occurred_at<?", []string{"locked", "terminated"}, w.PreviousBegin, w.End.AddDate(0, 0, 1))
		if !scope.Viewer.All {
			var ids []uint64
			if err := channelBindingQuery(r.data.DB().WithContext(ctx), scope.Viewer, business.ChannelFilter{Sources: []string{source}}).Distinct("b.platform_busier_id").Pluck("b.platform_busier_id", &ids).Error; err != nil {
				return business.ErrStorage
			}
			if len(ids) == 0 {
				continue
			}
			q = q.Where("old_busier_id IN ?", ids)
		}
		if !scope.IncludeSub {
			q = q.Where("promote_level=1")
		}
		var rows []struct {
			Kind    string
			Current bool
			Count   int64
		}
		if err := q.Select("kind,(occurred_at>=?) AS current,COUNT(DISTINCT promote_id) AS count", w.Begin).Group("kind,current").Scan(&rows).Error; err != nil {
			return business.ErrActivationSource
		}
		for _, row := range rows {
			target := &out.Previous
			if row.Current {
				target = &out.Current
			}
			if row.Kind == "locked" {
				target.LockedChannels += row.Count
			} else {
				target.TerminatedChannels += row.Count
			}
		}
	}
	return nil
}