// Copyright 2013 hanguofeng. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package gocaptcha

import ()

//ImageFilterManager
type ImageFilterManager struct {
	filters []ImageFilter
}

func CreateImageFilterManager() *ImageFilterManager {
	ret := new(ImageFilterManager)
	ret.filters = []ImageFilter{}
	return ret
}

func (manager *ImageFilterManager) AddFilter(filter ImageFilter) {
	manager.filters = append(manager.filters, filter)
}

func (manager *ImageFilterManager) GetFilters() []ImageFilter {
	return manager.filters
}

func CreateImageFilterManagerByConfig(config *FilterConfig) *ImageFilterManager {
	mgr := new(ImageFilterManager)
	mgr.filters = []ImageFilter{}

	filterClassMap := []ImageFilter{

		new(ImageFilterNoiseLine),
		new(ImageFilterNoisePoint),
		new(ImageFilterStrike),
	}

	for _, classP := range filterClassMap {
		//bug:crash when config has open_filters but not have the detail config
		for _, cfgId := range config.Filters {
			if (len(cfgId) > 0) && (cfgId == classP.GetId()) {
				c, ok := config.GetGroup(cfgId)
				if ok && nil != &c && len(c.data) > 0 {
					classP.SetConfig(c)
				}
				mgr.AddFilter(classP)
			}
		}

	}

	return mgr
}