package rpc

import (
	// "bytes"
	"encoding/json"
	"math/big"
	"strings"

	// "errors"
	"github.com/ethereum/go-ethereum/ethutil"
	"github.com/ethereum/go-ethereum/xeth"
)

type EthereumApi struct {
	pipe *xeth.JSXEth
}

func (p *EthereumApi) GetBlock(args *GetBlockArgs, reply *interface{}) error {
	err := args.requirements()
	if err != nil {
		return err
	}

	// var block xeth.JSBlock
	if args.BlockNumber > 0 {
		// block := p.pipe.BlockByNumber(int32(args.BlockNumber))
		*reply = p.pipe.BlockByNumber(args.BlockNumber)
	} else {
		// block := p.pipe.BlockByHash(args.Hash)
		*reply = p.pipe.BlockByHash(args.Hash)
	}
	return nil
}

func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) error {
	err := args.requirements()
	if err != nil {
		return err
	}
	result, _ := p.pipe.Transact(p.pipe.Key().PrivateKey, args.Recipient, args.Value, args.Gas, args.GasPrice, args.Body)
	*reply = result
	return nil
}

func (p *EthereumApi) Create(args *NewTxArgs, reply *interface{}) error {
	err := args.requirementsContract()
	if err != nil {
		return err
	}

	result, _ := p.pipe.Transact(p.pipe.Key().PrivateKey, "", args.Value, args.Gas, args.GasPrice, args.Body)
	*reply = result
	return nil
}

func (p *EthereumApi) PushTx(args *PushTxArgs, reply *interface{}) error {
	err := args.requirementsPushTx()
	if err != nil {
		return err
	}
	result, _ := p.pipe.PushTx(args.Tx)
	*reply = result
	return nil
}

func (p *EthereumApi) GetKey(args interface{}, reply *interface{}) error {
	*reply = p.pipe.Key()
	return nil
}

func (p *EthereumApi) GetStorageAt(args *GetStorageArgs, reply *interface{}) error {
	err := args.requirements()
	if err != nil {
		return err
	}

	state := p.pipe.World().SafeGet(ethutil.Hex2Bytes(args.Address))

	var hx string
	if strings.Index(args.Key, "0x") == 0 {
		hx = string([]byte(args.Key)[2:])
	} else {
		// Convert the incoming string (which is a bigint) into hex
		i, _ := new(big.Int).SetString(args.Key, 10)
		hx = ethutil.Bytes2Hex(i.Bytes())
	}
	jsonlogger.Debugf("GetStorageAt(%s, %s)\n", args.Address, hx)
	value := state.Storage(ethutil.Hex2Bytes(hx))
	*reply = GetStorageAtRes{Address: args.Address, Key: args.Key, Value: value.Str()}
	return nil
}

func (p *EthereumApi) GetPeerCount(reply *interface{}) error {
	*reply = p.pipe.PeerCount()
	return nil
}

func (p *EthereumApi) GetIsListening(reply *interface{}) error {
	*reply = p.pipe.IsListening()
	// *reply = NewSuccessRes(GetListeningRes{IsListening: p.pipe.IsListening()})
	return nil
}

func (p *EthereumApi) GetCoinbase(reply *interface{}) error {
	*reply = p.pipe.CoinBase()
	// *reply = p.pipe.CoinBase()
	return nil
}

func (p *EthereumApi) GetIsMining(reply *interface{}) error {
	*reply = p.pipe.IsMining()
	return nil
}

func (p *EthereumApi) GetTxCountAt(args *GetTxCountArgs, reply *interface{}) error {
	err := args.requirements()
	if err != nil {
		return err
	}
	*reply = p.pipe.TxCountAt(args.Address)
	return nil
}

func (p *EthereumApi) GetBalanceAt(args *GetBalanceArgs, reply *interface{}) error {
	err := args.requirements()
	if err != nil {
		return err
	}
	state := p.pipe.World().SafeGet(ethutil.Hex2Bytes(args.Address))
	*reply = BalanceRes{Balance: state.Balance().String(), Address: args.Address}
	return nil
}

// type JsonArgs interface {
// 	requirements() error
// }

// type BlockResponse struct {
// 	JsonResponse
// }

type GetBlockArgs struct {
	BlockNumber int32
	Hash        string
}

func (obj *GetBlockArgs) UnmarshalJSON(b []byte) (err error) {
	argint, argstr := int32(0), ""
	if err = json.Unmarshal(b, &argint); err == nil {
		obj.BlockNumber = argint
		return
	}
	if err = json.Unmarshal(b, &argstr); err == nil {
		obj.Hash = argstr
		return
	}
	return NewErrorResponse("Could not determine JSON parameters")
}

func (obj *GetBlockArgs) requirements() error {
	if obj.BlockNumber == 0 && obj.Hash == "" {
		return NewErrorResponse("GetBlock requires either a block 'number' or a block 'hash' as argument")
	}
	return nil
}

type NewTxArgs struct {
	Sec       string `json:"sec"`
	Recipient string `json:"recipient"`
	Value     string `json:"value"`
	Gas       string `json:"gas"`
	GasPrice  string `json:"gasprice"`
	Init      string `json:"init"`
	Body      string `json:"body"`
}

// type TxResponse struct {
// 	Hash string
// }

func (a *NewTxArgs) requirements() error {
	if a.Recipient == "" {
		return NewErrorResponse("Transact requires a 'recipient' address as argument")
	}
	if a.Value == "" {
		return NewErrorResponse("Transact requires a 'value' as argument")
	}
	if a.Gas == "" {
		return NewErrorResponse("Transact requires a 'gas' value as argument")
	}
	if a.GasPrice == "" {
		return NewErrorResponse("Transact requires a 'gasprice' value as argument")
	}
	return nil
}

func (a *NewTxArgs) requirementsContract() error {
	if a.Value == "" {
		return NewErrorResponse("Create requires a 'value' as argument")
	}
	if a.Gas == "" {
		return NewErrorResponse("Create requires a 'gas' value as argument")
	}
	if a.GasPrice == "" {
		return NewErrorResponse("Create requires a 'gasprice' value as argument")
	}
	if a.Body == "" {
		return NewErrorResponse("Create requires a 'body' value as argument")
	}
	return nil
}

type PushTxArgs struct {
	Tx string `json:"tx"`
}

func (a *PushTxArgs) requirementsPushTx() error {
	if a.Tx == "" {
		return NewErrorResponse("PushTx requires a 'tx' as argument")
	}
	return nil
}

type GetStorageArgs struct {
	Address string
	Key     string
}

func (a *GetStorageArgs) requirements() error {
	if a.Address == "" {
		return NewErrorResponse("GetStorageAt requires an 'address' value as argument")
	}
	if a.Key == "" {
		return NewErrorResponse("GetStorageAt requires an 'key' value as argument")
	}
	return nil
}

type GetStorageAtRes struct {
	Key     string `json:"key"`
	Value   string `json:"value"`
	Address string `json:"address"`
}

type GetTxCountArgs struct {
	Address string `json:"address"`
}

// type GetTxCountRes struct {
// 	Nonce int `json:"nonce"`
// }

func (obj *GetTxCountArgs) UnmarshalJSON(b []byte) (err error) {
	arg0 := ""
	if err = json.Unmarshal(b, arg0); err == nil {
		obj.Address = arg0
		return
	}
	return NewErrorResponse("Could not determine JSON parameters")
}

func (a *GetTxCountArgs) requirements() error {
	if a.Address == "" {
		return NewErrorResponse("GetTxCountAt requires an 'address' value as argument")
	}
	return nil
}

// type GetPeerCountRes struct {
// 	PeerCount int `json:"peerCount"`
// }

// type GetListeningRes struct {
// 	IsListening bool `json:"isListening"`
// }

// type GetCoinbaseRes struct {
// 	Coinbase string `json:"coinbase"`
// }

// type GetMiningRes struct {
// 	IsMining bool `json:"isMining"`
// }

type GetBalanceArgs struct {
	Address string
}

func (obj *GetBalanceArgs) UnmarshalJSON(b []byte) (err error) {
	arg0 := ""
	if err = json.Unmarshal(b, &arg0); err == nil {
		obj.Address = arg0
		return
	}
	return NewErrorResponse("Could not determine JSON parameters")
}

func (a *GetBalanceArgs) requirements() error {
	if a.Address == "" {
		return NewErrorResponse("GetBalanceAt requires an 'address' value as argument")
	}
	return nil
}

type BalanceRes struct {
	Balance string `json:"balance"`
	Address string `json:"address"`
}

// type TestRes struct {
// 	JsonResponse `json:"-"`
// 	Answer       int `json:"answer"`
// }

// func (p *EthereumApi) Test(args *GetBlockArgs, reply *interface{}) error {
// 	*reply = NewSuccessRes(TestRes{Answer: 15})
// 	return nil
// }