package schema

import (
	"time"

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

// AlertRule 预警规则：按类型 + 阈值触发，命中后写入 alert 消息表
type AlertRule struct {
	ent.Schema
}

func (AlertRule) Annotations() []schema.Annotation {
	return []schema.Annotation{entsql.Annotation{Table: "alert_rule"}}
}

func (AlertRule) Fields() []ent.Field {
	return []ent.Field{
		field.Int("id").Positive(),
		field.String("name").MaxLen(80).Comment("规则名称"),
		field.String("type").MaxLen(40).Comment("预警类型 torque_ng/inspection_ng/inventory_low/task_overdue"),
		field.Float("threshold").Default(0).Comment("阈值（不同类含义不同）"),
		field.String("receiver").Default("").MaxLen(255).Comment("接收人，逗号分隔"),
		field.Bool("enabled").Default(true).Comment("是否启用"),
		field.String("createdBy").Default("").MaxLen(64).Comment("创建人"),
		field.Time("createdAt").Default(time.Now).Immutable(),
	}
}

func (AlertRule) Indexes() []ent.Index {
	return []ent.Index{
		index.Fields("type"),
		index.Fields("enabled"),
	}
}