package schema

import (
	"time"

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

// EventLog 事件日志，记录系统中所有关键事件的审计追踪信息
type EventLog struct {
	ent.Schema
}

func (EventLog) Annotations() []schema.Annotation {
	return []schema.Annotation{
		entsql.Annotation{
			Table:   "event_log",
			Options: "COMMENT='事件日志表，记录系统所有关键事件的审计追踪，用于故障回溯和行为分析'",
		},
		entsql.WithComments(true),
	}
}

func (EventLog) Fields() []ent.Field {
	return []ent.Field{
		field.Int("id").Positive().Comment("主键ID"),
		field.String("eventType").MaxLen(50).Comment("事件类型，如 job_started/job_completed/equipment_error"),
		field.String("sourceId").Default("").Comment("事件源ID，产生事件的系统模块标识"),
		field.String("entityType").Default("").MaxLen(30).Comment("关联实体类型，如 job/equipment/temp_slot"),
		field.String("entityId").Default("").MaxLen(50).Comment("关联实体ID，对应实体表的主键"),
		field.Int64("entityVersion").Default(0).Comment("实体版本号，用于乐观锁并发控制"),
		field.Int("jobId").Optional().Comment("关联工件ID"),
		field.Int("equipmentId").Optional().Comment("关联设备ID"),
		field.String("equipmentName").MaxLen(64).Default("").Comment("设备名称，冗余存储便于查询"),
		field.Int("tempSlotNo").Optional().Comment("暂存台槽位号"),
		field.Text("description").Default("").Comment("事件描述，人可读的事件说明"),
		field.JSON("payload", map[string]any{}).Optional().SchemaType(map[string]string{
			dialect.Postgres: "jsonb",
		}).Comment("事件载荷，携带事件相关的结构化业务数据"),
		field.Time("startedAt").Optional().Comment("事件开始时间"),
		field.Time("endedAt").Optional().Comment("事件结束时间"),
		field.Time("createdAt").Default(time.Now).Immutable().Comment("日志记录创建时间"),
	}
}

func (EventLog) Indexes() []ent.Index {
	return []ent.Index{
		index.Fields("eventType"),
		index.Fields("createdAt"),
		index.Fields("entityType", "entityId"),
		index.Fields("jobId"),
		index.Fields("equipmentId"),
	}
}