package simstatus

import (
	"context"
	"fmt"
	"strings"

	"github.com/gogf/gf/v2/database/gdb"
	"github.com/gogf/gf/v2/os/gtime"

	"git.5iot.com/iotlcm-public/iotlcm-worker-svr/internal/dao"
	"git.5iot.com/iotlcm-public/iotlcm-worker-svr/internal/model/do"
)

// Result is the database projection of a successful status query.
type Result struct {
	CardID     int64
	CardStatus int
}

type Repository struct{}

func NewRepository() *Repository { return &Repository{} }

// ApplyBatch updates all successful results in one SQL statement. The status
// timestamp is written only for cards whose upstream query succeeded.
func (r *Repository) ApplyBatch(ctx context.Context, results []Result) error {
	if len(results) == 0 {
		return nil
	}
	ids := make([]int64, 0, len(results))
	var statement strings.Builder
	statement.WriteString("CASE " + dao.TSimCardInfo.Columns().Id + " ")
	for _, result := range results {
		if result.CardID <= 0 {
			return fmt.Errorf("status result has invalid cardId %d", result.CardID)
		}
		fmt.Fprintf(&statement, "WHEN %d THEN %d ", result.CardID, result.CardStatus)
		ids = append(ids, result.CardID)
	}
	statement.WriteString("END")
	_, err := dao.TSimCardInfo.Ctx(ctx).
		WhereIn(dao.TSimCardInfo.Columns().Id, ids).
		Data(do.TSimCardInfo{
			BossCardStatus: gdb.Raw(statement.String()),
			StatusSyncTime: gtime.Now(),
		}).Update()
	return err
}