package main

import (
	"fmt"
	"net"
	"net/http"
	"os"
	"time"

	"github.com/ethereum/go-ethereum/cmd/utils"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/ethereum/go-ethereum/rlp"
	"github.com/ethereum/go-ethereum/rpc"
	"github.com/ethereum/go-ethereum/state"
	"github.com/ethereum/go-ethereum/xeth"
	"github.com/obscuren/otto"
)

/*
node admin bindings
*/

func (js *jsre) adminBindings() {
	js.re.Set("admin", struct{}{})
	t, _ := js.re.Get("admin")
	admin := t.Object()
	admin.Set("suggestPeer", js.suggestPeer)
	admin.Set("startRPC", js.startRPC)
	admin.Set("startMining", js.startMining)
	admin.Set("stopMining", js.stopMining)
	admin.Set("nodeInfo", js.nodeInfo)
	admin.Set("peers", js.peers)
	admin.Set("newAccount", js.newAccount)
	admin.Set("unlock", js.unlock)
	admin.Set("import", js.importChain)
	admin.Set("export", js.exportChain)
	admin.Set("dumpBlock", js.dumpBlock)
}

func (js *jsre) startMining(call otto.FunctionCall) otto.Value {
	_, err := call.Argument(0).ToInteger()
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	// threads now ignored
	err = js.ethereum.StartMining()
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	return otto.TrueValue()
}

func (js *jsre) stopMining(call otto.FunctionCall) otto.Value {
	js.ethereum.StopMining()
	return otto.TrueValue()
}

func (js *jsre) startRPC(call otto.FunctionCall) otto.Value {
	addr, err := call.Argument(0).ToString()
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	port, err := call.Argument(1).ToInteger()
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	dataDir := js.ethereum.DataDir

	l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", addr, port))
	if err != nil {
		fmt.Printf("Can't listen on %s:%d: %v", addr, port, err)
		return otto.FalseValue()
	}
	go http.Serve(l, rpc.JSONRPC(xeth.New(js.ethereum, nil), dataDir))
	return otto.TrueValue()
}

func (js *jsre) suggestPeer(call otto.FunctionCall) otto.Value {
	nodeURL, err := call.Argument(0).ToString()
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	err = js.ethereum.SuggestPeer(nodeURL)
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	return otto.TrueValue()
}

func (js *jsre) unlock(call otto.FunctionCall) otto.Value {
	addr, err := call.Argument(0).ToString()
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	seconds, err := call.Argument(2).ToInteger()
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	arg := call.Argument(1)
	var passphrase string
	if arg.IsUndefined() {
		fmt.Println("Please enter a passphrase now.")
		passphrase, err = readPassword("Passphrase: ", true)
		if err != nil {
			utils.Fatalf("%v", err)
		}
	} else {
		passphrase, err = arg.ToString()
		if err != nil {
			fmt.Println(err)
			return otto.FalseValue()
		}
	}
	am := js.ethereum.AccountManager()
	// err := am.Unlock(common.FromHex(split[0]), split[1])
	// if err != nil {
	// 	utils.Fatalf("Unlock account failed '%v'", err)
	// }
	err = am.TimedUnlock(common.FromHex(addr), passphrase, time.Duration(seconds)*time.Second)
	if err != nil {
		fmt.Printf("Unlock account failed '%v'\n", err)
		return otto.FalseValue()
	}
	return otto.TrueValue()
}

func (js *jsre) newAccount(call otto.FunctionCall) otto.Value {
	arg := call.Argument(0)
	var passphrase string
	if arg.IsUndefined() {
		fmt.Println("The new account will be encrypted with a passphrase.")
		fmt.Println("Please enter a passphrase now.")
		auth, err := readPassword("Passphrase: ", true)
		if err != nil {
			utils.Fatalf("%v", err)
		}
		confirm, err := readPassword("Repeat Passphrase: ", false)
		if err != nil {
			utils.Fatalf("%v", err)
		}
		if auth != confirm {
			utils.Fatalf("Passphrases did not match.")
		}
		passphrase = auth
	} else {
		var err error
		passphrase, err = arg.ToString()
		if err != nil {
			fmt.Println(err)
			return otto.FalseValue()
		}
	}
	acct, err := js.ethereum.AccountManager().NewAccount(passphrase)
	if err != nil {
		fmt.Printf("Could not create the account: %v", err)
		return otto.UndefinedValue()
	}
	return js.re.ToVal(common.Bytes2Hex(acct.Address))
}

func (js *jsre) nodeInfo(call otto.FunctionCall) otto.Value {
	return js.re.ToVal(js.ethereum.NodeInfo())
}

func (js *jsre) peers(call otto.FunctionCall) otto.Value {
	return js.re.ToVal(js.ethereum.PeersInfo())
}

func (js *jsre) importChain(call otto.FunctionCall) otto.Value {
	if len(call.ArgumentList) == 0 {
		fmt.Println("err: require file name")
		return otto.FalseValue()
	}

	fn, err := call.Argument(0).ToString()
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}

	var fh *os.File
	fh, err = os.OpenFile(fn, os.O_RDONLY, os.ModePerm)
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	defer fh.Close()

	var blocks types.Blocks
	if err = rlp.Decode(fh, &blocks); err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}

	js.ethereum.ChainManager().Reset()
	if err = js.ethereum.ChainManager().InsertChain(blocks); err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}

	return otto.TrueValue()
}

func (js *jsre) exportChain(call otto.FunctionCall) otto.Value {
	if len(call.ArgumentList) == 0 {
		fmt.Println("err: require file name")
		return otto.FalseValue()
	}

	fn, err := call.Argument(0).ToString()
	if err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	if err := utils.ExportChain(js.ethereum.ChainManager(), fn); err != nil {
		fmt.Println(err)
		return otto.FalseValue()
	}
	return otto.TrueValue()
}

func (js *jsre) dumpBlock(call otto.FunctionCall) otto.Value {
	var block *types.Block
	if len(call.ArgumentList) > 0 {
		if call.Argument(0).IsNumber() {
			num, _ := call.Argument(0).ToInteger()
			block = js.ethereum.ChainManager().GetBlockByNumber(uint64(num))
		} else if call.Argument(0).IsString() {
			hash, _ := call.Argument(0).ToString()
			block = js.ethereum.ChainManager().GetBlock(common.HexToHash(hash))
		} else {
			fmt.Println("invalid argument for dump. Either hex string or number")
		}

	} else {
		block = js.ethereum.ChainManager().CurrentBlock()
	}
	if block == nil {
		fmt.Println("block not found")
		return otto.UndefinedValue()
	}

	statedb := state.New(block.Root(), js.ethereum.StateDb())
	dump := statedb.RawDump()
	return js.re.ToVal(dump)

}