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// Copyright (c) 2013-2014, Jeffrey Wilcke. All rights reserved.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
// MA 02110-1301  USA

package main

import (
    "flag"
    "fmt"
    "log"
    "os"
    "os/user"
    "path"
    "path/filepath"
    "runtime"

    "bitbucket.org/kardianos/osext"
    "github.com/ethereum/go-ethereum/logger"
    "github.com/ethereum/go-ethereum/vm"
)

var (
    Identifier      string
    KeyRing         string
    KeyStore        string
    PMPGateway      string
    StartRpc        bool
    StartWebSockets bool
    RpcPort         int
    UseUPnP         bool
    NatType         string
    OutboundPort    string
    ShowGenesis     bool
    AddPeer         string
    MaxPeer         int
    GenAddr         bool
    UseSeed         bool
    SecretFile      string
    ExportDir       string
    NonInteractive  bool
    Datadir         string
    LogFile         string
    ConfigFile      string
    DebugFile       string
    LogLevel        int
    VmType          int
)

// flags specific to gui client
var AssetPath string

//TODO: If we re-use the one defined in cmd.go the binary osx image crashes. If somebody finds out why we can dry this up.
func defaultAssetPath() string {
    var assetPath string
    // If the current working directory is the go-ethereum dir
    // assume a debug build and use the source directory as
    // asset directory.
    pwd, _ := os.Getwd()
    if pwd == path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "cmd", "mist") {
        assetPath = path.Join(pwd, "assets")
    } else {
        switch runtime.GOOS {
        case "darwin":
            // Get Binary Directory
            exedir, _ := osext.ExecutableFolder()
            assetPath = filepath.Join(exedir, "../Resources")
        case "linux":
            assetPath = "/usr/share/mist"
        case "windows":
            assetPath = "./assets"
        default:
            assetPath = "."
        }
    }
    return assetPath
}
func defaultDataDir() string {
    usr, _ := user.Current()
    return path.Join(usr.HomeDir, ".mist")
}

var defaultConfigFile = path.Join(defaultDataDir(), "conf.ini")

func Init() {
    flag.Usage = func() {
        fmt.Fprintf(os.Stderr, "%s [options] [filename]:\noptions precedence: default < config file < environment variables < command line\n", os.Args[0])
        flag.PrintDefaults()
    }

    flag.IntVar(&VmType, "vm", 0, "Virtual Machine type: 0-1: standard, debug")
    flag.StringVar(&Identifier, "id", "", "Custom client identifier")
    flag.StringVar(&KeyRing, "keyring", "", "identifier for keyring to use")
    flag.StringVar(&KeyStore, "keystore", "db", "system to store keyrings: db|file (db)")
    flag.StringVar(&OutboundPort, "port", "30303", "listening port")
    flag.BoolVar(&UseUPnP, "upnp", true, "enable UPnP support")
    flag.IntVar(&MaxPeer, "maxpeer", 30, "maximum desired peers")
    flag.IntVar(&RpcPort, "rpcport", 8080, "port to start json-rpc server on")
    flag.BoolVar(&StartRpc, "rpc", false, "start rpc server")
    flag.BoolVar(&StartWebSockets, "ws", false, "start websocket server")
    flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)")
    flag.BoolVar(&UseSeed, "seed", true, "seed peers")
    flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key")
    flag.StringVar(&NatType, "nat", "", "NAT support (UPNP|PMP) (none)")
    flag.StringVar(&SecretFile, "import", "", "imports the file given (hex or mnemonic formats)")
    flag.StringVar(&ExportDir, "export", "", "exports the session keyring to files in the directory given")
    flag.StringVar(&LogFile, "logfile", "", "log file (defaults to standard output)")
    flag.StringVar(&Datadir, "datadir", defaultDataDir(), "specifies the datadir to use")
    flag.StringVar(&PMPGateway, "pmp", "", "Gateway IP for PMP")
    flag.StringVar(&ConfigFile, "conf", defaultConfigFile, "config file")
    flag.StringVar(&DebugFile, "debug", "", "debug file (no debugging if not set)")
    flag.IntVar(&LogLevel, "loglevel", int(logger.InfoLevel), "loglevel: 0-5: silent,error,warn,info,debug,debug detail)")

    flag.StringVar(&AssetPath, "asset_path", defaultAssetPath(), "absolute path to GUI assets directory")

    flag.Parse()

    if VmType >= int(vm.MaxVmTy) {
        log.Fatal("Invalid VM type ", VmType)
    }
}