package dept

import (
	"context"

	"perms-system-server/internal/svc"
	"perms-system-server/internal/types"

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

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

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

func (l *DeptTreeLogic) DeptTree() (resp []*types.DeptItem, err error) {
	list, err := l.svcCtx.SysDeptModel.FindAll(l.ctx)
	if err != nil {
		return nil, err
	}

	items := make([]*types.DeptItem, 0, len(list))
	for _, d := range list {
		items = append(items, &types.DeptItem{
			Id:         d.Id,
			ParentId:   d.ParentId,
			Name:       d.Name,
			Path:       d.Path,
			Sort:       d.Sort,
			DeptType:   d.DeptType,
			Remark:     d.Remark,
			Status:     d.Status,
			CreateTime: d.CreateTime,
			Children:   make([]*types.DeptItem, 0),
		})
	}

	itemMap := make(map[int64]*types.DeptItem)
	for _, item := range items {
		itemMap[item.Id] = item
	}

	roots := make([]*types.DeptItem, 0)
	for _, item := range items {
		if item.ParentId == 0 {
			roots = append(roots, item)
		} else if parent, ok := itemMap[item.ParentId]; ok {
			parent.Children = append(parent.Children, item)
		} else {
			roots = append(roots, item)
		}
	}

	return roots, nil
}