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/*
    This file is part of go-ethereum

    go-ethereum 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 3 of the License, or
    (at your option) any later version.

    go-ethereum 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 go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @authors
 *  Jeffrey Wilcke <i@jev.io>
 */
package main

import (
    "crypto/ecdsa"
    "flag"
    "fmt"
    "log"
    "os"
    "path"
    "runtime"

    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/ethutil"
    "github.com/ethereum/go-ethereum/logger"
    "github.com/ethereum/go-ethereum/p2p/nat"
    "github.com/ethereum/go-ethereum/vm"
)

var (
    Identifier       string
    KeyRing          string
    DiffTool         bool
    DiffType         string
    KeyStore         string
    StartRpc         bool
    StartWebSockets  bool
    RpcListenAddress string
    RpcPort          int
    OutboundPort     string
    ShowGenesis      bool
    AddPeer          string
    MaxPeer          int
    GenAddr          bool
    BootNodes        string
    NodeKey          *ecdsa.PrivateKey
    NAT              nat.Interface
    SecretFile       string
    ExportDir        string
    NonInteractive   bool
    Datadir          string
    LogFile          string
    ConfigFile       string
    DebugFile        string
    LogLevel         int
    LogFormat        string
    Dump             bool
    DumpHash         string
    DumpNumber       int
    VmType           int
    ImportChain      string
    SHH              bool
    Dial             bool
    PrintVersion     bool
    MinerThreads     int
)

// flags specific to cli client
var (
    StartMining    bool
    StartJsConsole bool
    InputFile      string
)

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

func Init() {
    // TODO: move common flag processing to cmd/util
    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")

    flag.StringVar(&RpcListenAddress, "rpcaddr", "127.0.0.1", "address for json-rpc server to listen on")
    flag.IntVar(&RpcPort, "rpcport", 8545, "port to start json-rpc server on")
    flag.BoolVar(&StartRpc, "rpc", false, "start rpc server")
    flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)")
    flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key")
    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", ethutil.DefaultDataDir(), "specifies the datadir to use")
    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(&LogFormat, "logformat", "std", "logformat: std,raw")
    flag.BoolVar(&DiffTool, "difftool", false, "creates output for diff'ing. Sets LogLevel=0")
    flag.StringVar(&DiffType, "diff", "all", "sets the level of diff output [vm, all]. Has no effect if difftool=false")
    flag.BoolVar(&ShowGenesis, "genesis", false, "Dump the genesis block")
    flag.StringVar(&ImportChain, "chain", "", "Imports given chain")

    flag.BoolVar(&Dump, "dump", false, "output the ethereum state in JSON format. Sub args [number, hash]")
    flag.StringVar(&DumpHash, "hash", "", "specify arg in hex")
    flag.IntVar(&DumpNumber, "number", -1, "specify arg in number")

    flag.BoolVar(&StartMining, "mine", false, "start mining")
    flag.BoolVar(&StartJsConsole, "js", false, "launches javascript console")
    flag.BoolVar(&PrintVersion, "version", false, "prints version number")
    flag.IntVar(&MinerThreads, "minerthreads", runtime.NumCPU(), "number of miner threads")

    // Network stuff
    var (
        nodeKeyFile = flag.String("nodekey", "", "network private key file")
        nodeKeyHex  = flag.String("nodekeyhex", "", "network private key (for testing)")
        natstr      = flag.String("nat", "any", "port mapping mechanism (any|none|upnp|pmp|extip:<IP>)")
    )
    flag.BoolVar(&Dial, "dial", true, "dial out connections (default on)")
    //flag.BoolVar(&SHH, "shh", true, "run whisper protocol (default on)")
    flag.StringVar(&OutboundPort, "port", "30303", "listening port")

    flag.StringVar(&BootNodes, "bootnodes", "", "space-separated node URLs for discovery bootstrap")
    flag.IntVar(&MaxPeer, "maxpeer", 30, "maximum desired peers")
    flag.IntVar(&MinerThreads, "minerthreads", runtime.NumCPU(), "number of miner threads")

    flag.Parse()

    // When the javascript console is started log to a file instead
    // of stdout
    if StartJsConsole {
        LogFile = path.Join(Datadir, "ethereum.log")
    }

    var err error
    if NAT, err = nat.Parse(*natstr); err != nil {
        log.Fatalf("-nat: %v", err)
    }
    switch {
    case *nodeKeyFile != "" && *nodeKeyHex != "":
        log.Fatal("Options -nodekey and -nodekeyhex are mutually exclusive")
    case *nodeKeyFile != "":
        if NodeKey, err = crypto.LoadECDSA(*nodeKeyFile); err != nil {
            log.Fatalf("-nodekey: %v", err)
        }
    case *nodeKeyHex != "":
        if NodeKey, err = crypto.HexToECDSA(*nodeKeyHex); err != nil {
            log.Fatalf("-nodekeyhex: %v", err)
        }
    }

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

    InputFile = flag.Arg(0)
}