package schema

import (
	"time"

	"entgo.io/ent"
	"entgo.io/ent/dialect/entsql"
	"entgo.io/ent/schema"
	"entgo.io/ent/schema/edge"
	"entgo.io/ent/schema/field"
)

type Department struct {
	ent.Schema
}

func (Department) Annotations() []schema.Annotation {
	return []schema.Annotation{
		entsql.Annotation{
			Table:   "department",
			Options: "COMMENT='部门表，用于存储组织架构中的部门信息'",
		},
		entsql.WithComments(true),
	}
}

func (Department) Fields() []ent.Field {
	return []ent.Field{
		field.Int("id").Positive().Comment("部门ID"),
		field.String("name").MaxLen(20).NotEmpty().Unique().Comment("部门名称，唯一且不超过20个字符"),
		field.Int("parentId").Optional().Comment("父部门ID，用于构建部门层级树"),
		field.Int("order").Optional().Positive().Comment("同级排序序号，正数，越小越靠前"),
		field.Time("createdAt").Default(time.Now).Immutable().Comment("创建时间，记录不可变"),
		field.Time("updatedAt").Default(time.Now).UpdateDefault(time.Now).Comment("更新时间，每次修改自动更新"),
	}
}

func (Department) Edges() []ent.Edge {
	return []ent.Edge{
		edge.To("children", Department.Type).From("parent").Field("parentId").Unique(),
		edge.To("users", User.Type),
	}
}