package eventlog

import (
	"context"
	"time"

	"bj_power_mes/ent"
	"bj_power_mes/ent/eventlog"
)

// Writer 封装操作日志写入
type Writer struct {
	client *ent.Client
}

func NewWriter(client *ent.Client) *Writer {
	return &Writer{client: client}
}

// Payload 可选载荷
type Payload = map[string]any

// Write 记录一条操作日志（event_log 必含 workOrderNo、operator 字段）
func (w *Writer) Write(ctx context.Context, eventType, workOrderNo, operator, entityType, entityId, description string, payload Payload) {
	b := w.client.EventLog.Create().
		SetEventType(eventType).
		SetWorkOrderNo(workOrderNo).
		SetOperator(operator).
		SetEntityType(entityType).
		SetEntityId(entityId).
		SetDescription(description)
	if payload != nil {
		b.SetPayload(payload)
	}
	if _, err := b.Save(ctx); err != nil {
		_ = err
	}
}

// Writer Query 支持按事件类型/工单号/操作人/时间范围查询。
// from/to 传时间戳毫秒（0 表示不限）。
func (w *Writer) Query(ctx context.Context, eventType, workOrderNo, operator string, fromMs, toMs int64, page, pageSize int) ([]*ent.EventLog, int, error) {
	q := w.client.EventLog.Query()
	if eventType != "" {
		// 前缀匹配：前端按业务域"族"筛选（如 work.order. / daily.plan.）
		q = q.Where(eventlog.EventTypeHasPrefix(eventType))
	}
	if workOrderNo != "" {
		q = q.Where(eventlog.WorkOrderNo(workOrderNo))
	}
	if operator != "" {
		q = q.Where(eventlog.Operator(operator))
	}
	if fromMs > 0 {
		q = q.Where(eventlog.CreatedAtGTE(time.UnixMilli(fromMs)))
	}
	if toMs > 0 {
		q = q.Where(eventlog.CreatedAtLTE(time.UnixMilli(toMs)))
	}
	total, err := q.Count(ctx)
	if err != nil {
		return nil, 0, err
	}
	list, err := q.Order(ent.Desc(eventlog.FieldCreatedAt), ent.Desc(eventlog.FieldID)).
		Offset((page - 1) * pageSize).Limit(pageSize).All(ctx)
	if err != nil {
		return nil, 0, err
	}
	return list, total, nil
}