package mailstore

import (
	"context"
	"database/sql"
	"errors"
	"fmt"

	"galaxy/mail/internal/domain/common"
	deliverydomain "galaxy/mail/internal/domain/delivery"
	"galaxy/mail/internal/service/acceptauthdelivery"
)

var _ acceptauthdelivery.Store = (*Store)(nil)

// CreateAcceptance writes one auth-delivery acceptance write set inside one
// BEGIN … COMMIT transaction. Idempotency races surface as
// acceptauthdelivery.ErrConflict.
func (store *Store) CreateAcceptance(ctx context.Context, input acceptauthdelivery.CreateAcceptanceInput) error {
	if store == nil {
		return errors.New("create auth acceptance: nil store")
	}
	if ctx == nil {
		return errors.New("create auth acceptance: nil context")
	}
	if err := input.Validate(); err != nil {
		return fmt.Errorf("create auth acceptance: %w", err)
	}

	return store.withTx(ctx, "create auth acceptance", func(ctx context.Context, tx *sql.Tx) error {
		if err := insertDelivery(ctx, tx, input.Delivery, input.Idempotency, input.Idempotency.ExpiresAt, input.FirstAttempt); err != nil {
			if isUniqueViolation(err) {
				return acceptauthdelivery.ErrConflict
			}
			return fmt.Errorf("create auth acceptance: insert delivery: %w", err)
		}

		if input.FirstAttempt != nil {
			if err := insertAttempt(ctx, tx, *input.FirstAttempt); err != nil {
				return fmt.Errorf("create auth acceptance: insert first attempt: %w", err)
			}
		}
		return nil
	})
}

// GetDelivery loads one accepted delivery by its identifier.
func (store *Store) GetDelivery(ctx context.Context, deliveryID common.DeliveryID) (deliverydomain.Delivery, bool, error) {
	if store == nil {
		return deliverydomain.Delivery{}, false, errors.New("get delivery: nil store")
	}
	operationCtx, cancel, err := store.operationContext(ctx, "get delivery")
	if err != nil {
		return deliverydomain.Delivery{}, false, err
	}
	defer cancel()

	record, ok, err := loadDeliveryByID(operationCtx, store.db, deliveryID)
	if err != nil {
		return deliverydomain.Delivery{}, false, fmt.Errorf("get delivery: %w", err)
	}
	return record, ok, nil
}