package schema

import (
	"entgo.io/ent"
	"entgo.io/ent/dialect/entsql"
	"entgo.io/ent/schema"
	"entgo.io/ent/schema/edge"
	"entgo.io/ent/schema/field"
	"git.noahlan.cn/noahlan/ntool-biz/core/orm/nent/mixins"
	"git.noahlan.cn/noahlan/ntool/nrandom"
)

type Department struct {
	ent.Schema
}

func (Department) Fields() []ent.Field {
	return []ent.Field{
		field.String("name").Comment("Department name | 部门名称"),
		field.Int64("leader_id").Optional().Comment("Department leader | 部门负责人"),
		field.String("remark").Optional().Comment("Remark | 备注"),
		field.Int64("parent_id").Optional().Comment("Parent ID | 直接父级ID"),
	}
}

func (Department) Mixin() []ent.Mixin {
	return []ent.Mixin{
		mixins.NewDistributedIDMixin(func() int64 { return nrandom.SnowflakeId() }),
		mixins.TimeMixin{},
		mixins.StatusMixin{},
		mixins.OptimisticLockMixin{},
	}
}

func (Department) Edges() []ent.Edge {
	return []ent.Edge{
		// one to many at same type (tree data structure)
		edge.To("children", Department.Type).
			From("parent").
			Field("parent_id").
			Unique(),
		// 用户从属关系
		edge.From("users", User.Type).
			Ref("departments"), // to many
		// 负责人关系
		edge.To("leader", User.Type).
			Field("leader_id").
			Unique(),
	}
}

func (Department) Indexes() []ent.Index {
	return nil
}

func (Department) Annotations() []schema.Annotation {
	return []schema.Annotation{
		entsql.WithComments(true),
		entsql.Annotation{Table: "sys_department"},
		schema.Comment("系统部门表"),
	}
}