package relation

import (
	"context"
	"errors"

	"muyu-apiserver/gateway/internal/svc"
	"muyu-apiserver/gateway/internal/types"
	"muyu-apiserver/pkg/ctxdata"

	"github.com/zeromicro/go-zero/core/logx"
)

type ListDownstreamLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewListDownstreamLogic(ctx context.Context, svcCtx *svc.ServiceContext) *ListDownstreamLogic {
	return &ListDownstreamLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *ListDownstreamLogic) ListDownstream(req *types.CrmListRelationsReq) (*types.CrmListRelationsResp, error) {
	if req.Depth != 1 {
		return nil, errors.New("only depth=1 is allowed")
	}

	tenantId := ctxdata.GetTenantId(l.ctx)
	rows, err := l.svcCtx.CrmRepo.ListDownstream(l.ctx, tenantId)
	if err != nil {
		return nil, err
	}

	list := make([]types.CrmRelationInfo, 0, len(rows))
	for _, row := range rows {
		item := types.CrmRelationInfo{
			RelationshipId: row.RelationshipId,
			FromTenantId:   row.FromTenantId,
			FromTenantName: row.FromTenantName,
			ToTenantId:     row.ToTenantId,
			ToTenantName:   row.ToTenantName,
			RelationType:   row.RelationType,
			Status:         row.Status,
			ValidFrom:      row.ValidFrom.Format(timeLayout),
		}
		if row.ValidTo.Valid {
			item.ValidTo = row.ValidTo.Time.Format(timeLayout)
		}
		list = append(list, item)
	}
	return &types.CrmListRelationsResp{Total: int64(len(list)), List: list}, nil
}