package inmemory

import (
	"git.frostfs.info/TrueCloudLab/policy-engine/pkg/chain"
	"git.frostfs.info/TrueCloudLab/policy-engine/pkg/engine"
)

type inmemoryMorphRuleChainStorage struct {
	nameToNamespaceChains engine.LocalOverrideStorage
	nameToContainerChains engine.LocalOverrideStorage
}

func NewInmemoryMorphRuleChainStorage() engine.MorphRuleChainStorage {
	return &inmemoryMorphRuleChainStorage{
		nameToNamespaceChains: NewInmemoryLocalStorage(),
		nameToContainerChains: NewInmemoryLocalStorage(),
	}
}

func (s *inmemoryMorphRuleChainStorage) AddMorphRuleChain(name chain.Name, target engine.Target, c *chain.Chain) (err error) {
	switch target.Type {
	case engine.Namespace:
		_, err = s.nameToNamespaceChains.AddOverride(name, target.Name, c)
	case engine.Container:
		_, err = s.nameToContainerChains.AddOverride(name, target.Name, c)
	default:
		err = engine.ErrUnknownTarget
	}
	return
}

func (s *inmemoryMorphRuleChainStorage) RemoveMorphRuleChain(name chain.Name, target engine.Target, chainID chain.ID) error {
	switch target.Type {
	case engine.Namespace:
		return s.nameToNamespaceChains.RemoveOverride(name, target.Name, chainID)
	case engine.Container:
		return s.nameToContainerChains.RemoveOverride(name, target.Name, chainID)
	default:
		return engine.ErrUnknownTarget
	}
}

func (s *inmemoryMorphRuleChainStorage) ListMorphRuleChains(name chain.Name, target engine.Target) ([]*chain.Chain, error) {
	switch target.Type {
	case engine.Namespace:
		return s.nameToNamespaceChains.ListOverrides(name, target.Name)
	case engine.Container:
		return s.nameToContainerChains.ListOverrides(name, target.Name)
	default:
	}
	return nil, engine.ErrUnknownTarget
}