package main

import (
	"os"
	"strings"

	is "github.com/containers/image/storage"
	"github.com/containers/storage"
	"github.com/fatih/camelcase"
	"github.com/kubernetes-incubator/cri-o/libkpod"
	"github.com/kubernetes-incubator/cri-o/server"
	"github.com/urfave/cli"
)

var (
	stores = make(map[storage.Store]struct{})
)

func getStore(c *libkpod.Config) (storage.Store, error) {
	options := storage.DefaultStoreOptions
	options.GraphRoot = c.Root
	options.RunRoot = c.RunRoot
	options.GraphDriverName = c.Storage
	options.GraphDriverOptions = c.StorageOptions

	store, err := storage.GetStore(options)
	if err != nil {
		return nil, err
	}
	is.Transport.SetStore(store)
	stores[store] = struct{}{}
	return store, nil
}

func shutdownStores() {
	for store := range stores {
		if _, err := store.Shutdown(false); err != nil {
			break
		}
	}
}

func getConfig(c *cli.Context) (*libkpod.Config, error) {
	config := libkpod.DefaultConfig()
	var configFile string
	if c.GlobalIsSet("config") {
		configFile = c.GlobalString("config")
	} else if _, err := os.Stat(server.CrioConfigPath); err == nil {
		configFile = server.CrioConfigPath
	}
	// load and merge the configfile from the commandline or use
	// the default crio config file
	if configFile != "" {
		err := config.UpdateFromFile(configFile)
		if err != nil {
			return config, err
		}
	}
	if c.GlobalIsSet("root") {
		config.Root = c.GlobalString("root")
	}
	if c.GlobalIsSet("runroot") {
		config.RunRoot = c.GlobalString("runroot")
	}

	if c.GlobalIsSet("storage-driver") {
		config.Storage = c.GlobalString("storage-driver")
	}
	if c.GlobalIsSet("storage-opt") {
		opts := c.GlobalStringSlice("storage-opt")
		if len(opts) > 0 {
			config.StorageOptions = opts
		}
	}
	if c.GlobalIsSet("runtime") {
		config.Runtime = c.GlobalString("runtime")
	}
	return config, nil
}

func splitCamelCase(src string) string {
	entries := camelcase.Split(src)
	return strings.Join(entries, " ")
}