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package xeth

import (
    "bytes"
    "encoding/json"
    "sync/atomic"

    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/ethutil"
    "github.com/ethereum/go-ethereum/state"
)

type JSXEth struct {
    *XEth
}

func NewJSXEth(eth core.EthManager) *JSXEth {
    return &JSXEth{New(eth)}
}

func (self *JSXEth) BlockByHash(strHash string) *JSBlock {
    hash := ethutil.Hex2Bytes(strHash)
    block := self.obj.ChainManager().GetBlock(hash)

    return NewJSBlock(block)
}

func (self *JSXEth) BlockByNumber(num int32) *JSBlock {
    if num == -1 {
        return NewJSBlock(self.obj.ChainManager().CurrentBlock)
    }

    return NewJSBlock(self.obj.ChainManager().GetBlockByNumber(uint64(num)))
}

func (self *JSXEth) Block(v interface{}) *JSBlock {
    if n, ok := v.(int32); ok {
        return self.BlockByNumber(n)
    } else if str, ok := v.(string); ok {
        return self.BlockByHash(str)
    } else if f, ok := v.(float64); ok { // Don't ask ...
        return self.BlockByNumber(int32(f))
    }

    return nil
}

func (self *JSXEth) Key() *JSKey {
    return NewJSKey(self.obj.KeyManager().KeyPair())
}

func (self *JSXEth) StateObject(addr string) *JSObject {
    object := &Object{self.World().safeGet(ethutil.Hex2Bytes(addr))}

    return NewJSObject(object)
}

func (self *JSXEth) PeerCount() int {
    return self.obj.PeerCount()
}

func (self *JSXEth) Peers() []JSPeer {
    var peers []JSPeer
    for peer := self.obj.Peers().Front(); peer != nil; peer = peer.Next() {
        p := peer.Value.(core.Peer)
        // we only want connected peers
        if atomic.LoadInt32(p.Connected()) != 0 {
            peers = append(peers, *NewJSPeer(p))
        }
    }

    return peers
}

func (self *JSXEth) IsMining() bool {
    return self.obj.IsMining()
}

func (self *JSXEth) IsListening() bool {
    return self.obj.IsListening()
}

func (self *JSXEth) CoinBase() string {
    return ethutil.Bytes2Hex(self.obj.KeyManager().Address())
}

func (self *JSXEth) NumberToHuman(balance string) string {
    b := ethutil.Big(balance)

    return ethutil.CurrencyToString(b)
}

func (self *JSXEth) StorageAt(addr, storageAddr string) string {
    storage := self.World().SafeGet(ethutil.Hex2Bytes(addr)).Storage(ethutil.Hex2Bytes(storageAddr))

    return ethutil.Bytes2Hex(storage.Bytes())
}

func (self *JSXEth) BalanceAt(addr string) string {
    return self.World().SafeGet(ethutil.Hex2Bytes(addr)).Balance().String()
}

func (self *JSXEth) TxCountAt(address string) int {
    return int(self.World().SafeGet(ethutil.Hex2Bytes(address)).Nonce)
}

func (self *JSXEth) CodeAt(address string) string {
    return ethutil.Bytes2Hex(self.World().SafeGet(ethutil.Hex2Bytes(address)).Code)
}

func (self *JSXEth) IsContract(address string) bool {
    return len(self.World().SafeGet(ethutil.Hex2Bytes(address)).Code) > 0
}

func (self *JSXEth) SecretToAddress(key string) string {
    pair, err := crypto.NewKeyPairFromSec(ethutil.Hex2Bytes(key))
    if err != nil {
        return ""
    }

    return ethutil.Bytes2Hex(pair.Address())
}

func (self *JSXEth) Execute(addr, value, gas, price, data string) (string, error) {
    ret, err := self.ExecuteObject(&Object{
        self.World().safeGet(ethutil.Hex2Bytes(addr))},
        ethutil.Hex2Bytes(data),
        ethutil.NewValue(value),
        ethutil.NewValue(gas),
        ethutil.NewValue(price),
    )

    return ethutil.Bytes2Hex(ret), err
}

type KeyVal struct {
    Key   string `json:"key"`
    Value string `json:"value"`
}

func (self *JSXEth) EachStorage(addr string) string {
    var values []KeyVal
    object := self.World().SafeGet(ethutil.Hex2Bytes(addr))
    object.EachStorage(func(name string, value *ethutil.Value) {
        value.Decode()
        values = append(values, KeyVal{ethutil.Bytes2Hex([]byte(name)), ethutil.Bytes2Hex(value.Bytes())})
    })

    valuesJson, err := json.Marshal(values)
    if err != nil {
        return ""
    }

    return string(valuesJson)
}

func (self *JSXEth) ToAscii(str string) string {
    padded := ethutil.RightPadBytes([]byte(str), 32)

    return "0x" + ethutil.Bytes2Hex(padded)
}

func (self *JSXEth) FromAscii(str string) string {
    if ethutil.IsHex(str) {
        str = str[2:]
    }

    return string(bytes.Trim(ethutil.Hex2Bytes(str), "\x00"))
}

func (self *JSXEth) FromNumber(str string) string {
    if ethutil.IsHex(str) {
        str = str[2:]
    }

    return ethutil.BigD(ethutil.Hex2Bytes(str)).String()
}

func (self *JSXEth) Transact(key, toStr, valueStr, gasStr, gasPriceStr, codeStr string) (string, error) {
    var (
        to       []byte
        value    = ethutil.NewValue(valueStr)
        gas      = ethutil.NewValue(gasStr)
        gasPrice = ethutil.NewValue(gasPriceStr)
        data     []byte
    )

    if ethutil.IsHex(codeStr) {
        data = ethutil.Hex2Bytes(codeStr[2:])
    } else {
        data = ethutil.Hex2Bytes(codeStr)
    }

    if ethutil.IsHex(toStr) {
        to = ethutil.Hex2Bytes(toStr[2:])
    } else {
        to = ethutil.Hex2Bytes(toStr)
    }

    var keyPair *crypto.KeyPair
    var err error
    if ethutil.IsHex(key) {
        keyPair, err = crypto.NewKeyPairFromSec([]byte(ethutil.Hex2Bytes(key[2:])))
    } else {
        keyPair, err = crypto.NewKeyPairFromSec([]byte(ethutil.Hex2Bytes(key)))
    }

    if err != nil {
        return "", err
    }

    tx, err := self.XEth.Transact(keyPair, to, value, gas, gasPrice, data)
    if err != nil {
        return "", err
    }
    if types.IsContractAddr(to) {
        return ethutil.Bytes2Hex(tx.CreationAddress(nil)), nil
    }

    return ethutil.Bytes2Hex(tx.Hash()), nil
}

func (self *JSXEth) PushTx(txStr string) (*JSReceipt, error) {
    tx := types.NewTransactionFromBytes(ethutil.Hex2Bytes(txStr))
    err := self.obj.TxPool().Add(tx)
    if err != nil {
        return nil, err
    }

    return NewJSReciept(tx.CreatesContract(), tx.CreationAddress(self.World().State()), tx.Hash(), tx.Sender()), nil
}

func (self *JSXEth) CompileMutan(code string) string {
    data, err := self.XEth.CompileMutan(code)
    if err != nil {
        return err.Error()
    }

    return ethutil.Bytes2Hex(data)
}

func (self *JSXEth) FindInConfig(str string) string {
    return ethutil.Bytes2Hex(self.World().Config().Get(str).Address())
}

func ToJSMessages(messages state.Messages) *ethutil.List {
    var msgs []JSMessage
    for _, m := range messages {
        msgs = append(msgs, NewJSMessage(m))
    }

    return ethutil.NewList(msgs)
}