package rpc

import (
	"github.com/CityOfZion/neo-go/pkg/core/transaction"
	"github.com/CityOfZion/neo-go/pkg/rpc/wrappers"
	"github.com/CityOfZion/neo-go/pkg/vm"
)

// InvokeScriptResponse stores response for the invoke script call.
type InvokeScriptResponse struct {
	responseHeader
	Error  *Error        `json:"error,omitempty"`
	Result *InvokeResult `json:"result,omitempty"`
}

// InvokeResult represents the outcome of a script that is
// executed by the NEO VM.
type InvokeResult struct {
	State       vm.State `json:"state"`
	GasConsumed string   `json:"gas_consumed"`
	Script      string   `json:"script"`
	Stack       []StackParam
}

// AccountStateResponse holds the getaccountstate response.
type AccountStateResponse struct {
	responseHeader
	Result *Account `json:"result"`
}

// UnspentResponse represents server response to the `getunspents` command.
type UnspentResponse struct {
	responseHeader
	Error  *Error             `json:"error,omitempty"`
	Result *wrappers.Unspents `json:"result,omitempty"`
}

// Account represents details about a NEO account.
type Account struct {
	Version    int    `json:"version"`
	ScriptHash string `json:"script_hash"`
	Frozen     bool
	// TODO: need to check this field out.
	Votes    []interface{}
	Balances []*Balance
}

// Balance represents details about a NEO account balance.
type Balance struct {
	Asset string `json:"asset"`
	Value string `json:"value"`
}

type params struct {
	values []interface{}
}

func newParams(vals ...interface{}) params {
	p := params{}
	p.values = make([]interface{}, len(vals))
	for i := 0; i < len(p.values); i++ {
		p.values[i] = vals[i]
	}
	return p
}

type request struct {
	JSONRPC string        `json:"jsonrpc"`
	Method  string        `json:"method"`
	Params  []interface{} `json:"params"`
	ID      int           `json:"id"`
}

type responseHeader struct {
	ID      int    `json:"id"`
	JSONRPC string `json:"jsonrpc"`
}

type response struct {
	responseHeader
	Error  *Error      `json:"error"`
	Result interface{} `json:"result"`
}

// SendToAddressResponse stores response for the sendtoaddress call.
type SendToAddressResponse struct {
	responseHeader
	Error  *Error `json:"error"`
	Result *TxResponse
}

// GetRawTxResponse represents verbose output of `getrawtransaction` RPC call.
type GetRawTxResponse struct {
	responseHeader
	Error  *Error         `json:"error"`
	Result *RawTxResponse `json:"result"`
}

// GetTxOutResponse represents result of `gettxout` RPC call.
type GetTxOutResponse struct {
	responseHeader
	Error  *Error
	Result *wrappers.TransactionOutput
}

// RawTxResponse stores transaction with blockchain metadata to be sent as a response.
type RawTxResponse struct {
	TxResponse
	BlockHash     string `json:"blockhash"`
	Confirmations uint   `json:"confirmations"`
	BlockTime     uint   `json:"blocktime"`
}

// TxResponse stores transaction to be sent as a response.
type TxResponse struct {
	TxID       string                  `json:"txid"`
	Size       int                     `json:"size"`
	Type       string                  `json:"type"` // todo: convert to TransactionType
	Version    int                     `json:"version"`
	Attributes []transaction.Attribute `json:"attributes"`
	Vins       []Vin                   `json:"vin"`
	Vouts      []Vout                  `json:"vout"`
	SysFee     int                     `json:"sys_fee"`
	NetFee     int                     `json:"net_fee"`
	Scripts    []transaction.Witness   `json:"scripts"`
}

// Vin represents JSON-serializable tx input.
type Vin struct {
	TxID string `json:"txid"`
	Vout int    `json:"vout"`
}

// Vout represents JSON-serializable tx output.
type Vout struct {
	N       int    `json:"n"`
	Asset   string `json:"asset"`
	Value   int    `json:"value"`
	Address string `json:"address"`
}