package diagram

import (
	"context"
	"sync"

	"modelRT/config"

	"github.com/panjf2000/ants/v2"
)

func init() {
	globalComponentChanSet = &ComponentChanSet{
		AnchorChans: make([]chan config.AnchorParamConfig, 100),
	}
}

var globalComponentChanSet *ComponentChanSet

// ComponentChanSet defines component anchor real time data process channel set
type ComponentChanSet struct {
	sync.RWMutex
	AnchorChans []chan config.AnchorParamConfig
}

func GetComponentChan(ctx context.Context, componentID int64, pool *ants.PoolWithFunc) chan config.AnchorParamConfig {
	globalComponentChanSet.RLock()
	componentChan := globalComponentChanSet.AnchorChans[componentID]
	if componentChan == nil {
		globalComponentChanSet.RUnlock()
		globalComponentChanSet.Lock()
		defer globalComponentChanSet.Unlock()
		return CreateComponentChan(ctx, componentID, pool)
	}
	globalComponentChanSet.RUnlock()
	return componentChan
}

func CreateComponentChan(ctx context.Context, componentID int64, pool *ants.PoolWithFunc) chan config.AnchorParamConfig {
	componentChan := globalComponentChanSet.AnchorChans[componentID]
	if componentChan == nil {
		componentChan = make(chan config.AnchorParamConfig, 100)
		globalComponentChanSet.AnchorChans[componentID] = componentChan

		readyChan := make(chan struct{})
		chanConfig := config.AnchorChanConfig{
			Ctx:        ctx,
			AnchorChan: componentChan,
			ReadyChan:  readyChan,
		}
		pool.Invoke(chanConfig)
		<-readyChan
		return componentChan
	}
	return componentChan
}