package onboarding

import (
	"context"
	"data-terminal-cloud/internal/outbox"
	"encoding/json"
	"github.com/google/uuid"
	"time"
)

// Recover durable jobs after an outbox retry budget was exhausted during a
// pause. ProcessActivation owns the device lock and the no-repeat fence.
func (s *Service) RunMaintenance(ctx context.Context) {
	ticker := time.NewTicker(time.Minute)
	defer ticker.Stop()
	for {
		if err := s.MaintainOnce(ctx); err != nil && ctx.Err() == nil {
			s.options.Logger.Error("onboarding recovery scan failed")
		}
		select {
		case <-ctx.Done():
			return
		case <-ticker.C:
		}
	}
}
func (s *Service) MaintainOnce(ctx context.Context) error {
	rows, err := s.pool.Query(ctx, `SELECT j.device_id::text,j.id::text,j.binding_generation FROM device_activation_job j JOIN device d ON d.id=j.device_id JOIN device_binding b ON b.device_id=d.id AND b.unbound_at IS NULL AND b.generation=j.binding_generation WHERE d.status='registered' AND d.activation_state NOT IN ('LOST','REVOKED') AND j.binding_generation=d.binding_generation AND j.updated_at<now()-interval '3 minutes' AND (j.status IN ('NOT_STARTED','RESERVED','CONTACT_POSSIBLE') OR (j.status='REGISTERED_OBSERVED' AND j.config_ciphertext IS NULL)) ORDER BY j.updated_at LIMIT 10`)
	if err != nil {
		return err
	}
	type item struct {
		DeviceID     string `json:"device_id"`
		ActivationID string `json:"activation_id"`
		Generation   int64  `json:"binding_generation"`
	}
	var items []item
	for rows.Next() {
		var v item
		if err = rows.Scan(&v.DeviceID, &v.ActivationID, &v.Generation); err != nil {
			rows.Close()
			return err
		}
		items = append(items, v)
	}
	rows.Close()
	if err = rows.Err(); err != nil {
		return err
	}
	if s.options.ActivationEnabled {
		for _, v := range items {
			raw, _ := json.Marshal(v)
			if err = s.ProcessActivation(ctx, outbox.Event{ID: uuid.NewString(), Payload: raw}); err != nil {
				return err
			}
		}
	}
	// Retain business attempts and idempotency tombstones for replay protection.
	_, err = s.pool.Exec(ctx, `DELETE FROM device_handoff WHERE expires_at<now()-interval '1 day'`)
	if err != nil {
		return err
	}
	_, err = s.pool.Exec(ctx, `DELETE FROM device_time_challenge WHERE expires_at<now()-interval '1 day'`)
	return err
}