package sqlAsyncMgr

import (
	"sync"
	"sync/atomic"
)

// SqlAsyncIdentityStatistics sql标识统计类
type SqlAsyncIdentityStatistics struct {
	// 锁对象
	m sync.Mutex

	// 当前正在同步的sql数量
	syncCount int32

	// 待同步的统计
	statisticData map[string]*StatisticModel
}

// newSqlAsyncIdentityStatistics  创建新StatisticModel对象
func newSqlAsyncIdentityStatistics() *SqlAsyncIdentityStatistics {
	return &SqlAsyncIdentityStatistics{
		statisticData: make(map[string]*StatisticModel),
	}
}

// getItem 获取指定统计对象
func (this *SqlAsyncIdentityStatistics) getItem(_identityId string, isCreate bool) *StatisticModel {
	this.m.Lock()
	defer this.m.Unlock()

	if item, exists := this.statisticData[_identityId]; exists {
		return item
	}

	if isCreate == false {
		return nil
	}

	newItem := newStatisticModel(_identityId)
	this.statisticData[_identityId] = newItem

	return newItem
}

// AddCount 指定标识添加数量
func (this *SqlAsyncIdentityStatistics) AddCount(_identityId string, count int32) {
	model := this.getItem(_identityId, true)
	model.AddCount(count)

	// 原子操作相加
	atomic.AddInt32(&this.syncCount, count)
}

// Reduce 指定标识减少数量
func (this *SqlAsyncIdentityStatistics) Reduce(_identityId string, count int32) {
	if model := this.getItem(_identityId, false); model != nil {
		model.ReduceCount(count)
	}

	// 原子操作相减
	atomic.AddInt32(&this.syncCount, -count)
}

// GetCount 获取指定标识的数量
func (this *SqlAsyncIdentityStatistics) GetCount(_identityId string) int32 {
	if model := this.getItem(_identityId, false); model != nil {
		return model.Count
	}

	return 0
}

// GetAllCount 获取总的待写入数据
func (this *SqlAsyncIdentityStatistics) GetAllCount() int32 {
	return this.syncCount
}