package dept

import (
	"context"
	"fmt"
	"time"

	"perms-system-server/internal/consts"
	authHelper "perms-system-server/internal/logic/auth"
	deptModel "perms-system-server/internal/model/dept"
	"perms-system-server/internal/response"
	"perms-system-server/internal/svc"
	"perms-system-server/internal/types"

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

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

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

// CreateDept 创建部门。在指定父部门下新建子部门，自动继承路径层级。仅超管可调用。
func (l *CreateDeptLogic) CreateDept(req *types.CreateDeptReq) (resp *types.IdResp, err error) {
	if err := authHelper.RequireSuperAdmin(l.ctx); err != nil {
		return nil, err
	}

	if len(req.Name) > 64 {
		return nil, response.ErrBadRequest("部门名称长度不能超过64个字符")
	}
	if len(req.Remark) > 255 {
		return nil, response.ErrBadRequest("备注长度不能超过255个字符")
	}

	parentPath := "/"
	if req.ParentId > 0 {
		parent, err := l.svcCtx.SysDeptModel.FindOne(l.ctx, req.ParentId)
		if err != nil {
			return nil, response.ErrNotFound("父部门不存在")
		}
		parentPath = parent.Path
	}

	now := time.Now().Unix()
	var deptId int64

	deptType := req.DeptType
	if deptType == "" {
		deptType = consts.DeptTypeNormal
	} else if deptType != consts.DeptTypeNormal && deptType != consts.DeptTypeDev {
		return nil, response.ErrBadRequest("无效的部门类型")
	}

	err = l.svcCtx.SysDeptModel.TransactCtx(l.ctx, func(ctx context.Context, session sqlx.Session) error {
		result, err := l.svcCtx.SysDeptModel.InsertWithTx(ctx, session, &deptModel.SysDept{
			ParentId:   req.ParentId,
			Name:       req.Name,
			Path:       parentPath,
			Sort:       req.Sort,
			DeptType:   deptType,
			Remark:     req.Remark,
			Status:     consts.StatusEnabled,
			CreateTime: now,
			UpdateTime: now,
		})
		if err != nil {
			return err
		}

		deptId, _ = result.LastInsertId()

		d, err := l.svcCtx.SysDeptModel.FindOneWithTx(ctx, session, deptId)
		if err != nil {
			return err
		}
		d.Path = fmt.Sprintf("%s%d/", parentPath, deptId)
		return l.svcCtx.SysDeptModel.UpdateWithTx(ctx, session, d)
	})
	if err != nil {
		return nil, err
	}

	return &types.IdResp{Id: deptId}, nil
}