// Package nameservice contains RPC wrappers for NameService contract.
package nameservice

import (
	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
	"github.com/nspcc-dev/neo-go/pkg/rpcclient/nep11"
	"github.com/nspcc-dev/neo-go/pkg/rpcclient/unwrap"
	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
	"github.com/nspcc-dev/neo-go/pkg/util"
	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
	"math/big"
)

// Hash contains contract hash.
var Hash = util.Uint160{0xde, 0x46, 0x5f, 0x5d, 0x50, 0x57, 0xcf, 0x33, 0x28, 0x47, 0x94, 0xc5, 0xcf, 0xc2, 0xc, 0x69, 0x37, 0x1c, 0xac, 0x50}

// Invoker is used by ContractReader to call various safe methods.
type Invoker interface {
	nep11.Invoker
}

// Actor is used by Contract to call state-changing methods.
type Actor interface {
	Invoker
	nep11.Actor

	MakeCall(contract util.Uint160, method string, params ...interface{}) (*transaction.Transaction, error)
	MakeRun(script []byte) (*transaction.Transaction, error)
	MakeUnsignedCall(contract util.Uint160, method string, attrs []transaction.Attribute, params ...interface{}) (*transaction.Transaction, error)
	MakeUnsignedRun(script []byte, attrs []transaction.Attribute) (*transaction.Transaction, error)
	SendCall(contract util.Uint160, method string, params ...interface{}) (util.Uint256, uint32, error)
	SendRun(script []byte) (util.Uint256, uint32, error)
}

// ContractReader implements safe contract methods.
type ContractReader struct {
	nep11.NonDivisibleReader
	invoker Invoker
}

// Contract implements all contract methods.
type Contract struct {
	ContractReader
	nep11.BaseWriter
	actor Actor
}

// NewReader creates an instance of ContractReader using Hash and the given Invoker.
func NewReader(invoker Invoker) *ContractReader {
	return &ContractReader{*nep11.NewNonDivisibleReader(invoker, Hash), invoker}
}

// New creates an instance of Contract using Hash and the given Actor.
func New(actor Actor) *Contract {
	var nep11ndt = nep11.NewNonDivisible(actor, Hash)
	return &Contract{ContractReader{nep11ndt.NonDivisibleReader, actor},nep11ndt.BaseWriter, actor}
}


// Roots invokes `roots` method of contract.
func (c *ContractReader) Roots() (stackitem.Item, error) {
	return unwrap.Item(c.invoker.Call(Hash, "roots"))
}

// GetPrice invokes `getPrice` method of contract.
func (c *ContractReader) GetPrice(length *big.Int) (*big.Int, error) {
	return unwrap.BigInt(c.invoker.Call(Hash, "getPrice", length))
}

// IsAvailable invokes `isAvailable` method of contract.
func (c *ContractReader) IsAvailable(name string) (bool, error) {
	return unwrap.Bool(c.invoker.Call(Hash, "isAvailable", name))
}

// GetRecord invokes `getRecord` method of contract.
func (c *ContractReader) GetRecord(name string, typev *big.Int) (string, error) {
	return unwrap.UTF8String(c.invoker.Call(Hash, "getRecord", name, typev))
}

// GetAllRecords invokes `getAllRecords` method of contract.
func (c *ContractReader) GetAllRecords(name string) (stackitem.Item, error) {
	return unwrap.Item(c.invoker.Call(Hash, "getAllRecords", name))
}

// Resolve invokes `resolve` method of contract.
func (c *ContractReader) Resolve(name string, typev *big.Int) (string, error) {
	return unwrap.UTF8String(c.invoker.Call(Hash, "resolve", name, typev))
}

// Update creates a transaction invoking `update` method of the contract.
// This transaction is signed and immediately sent to the network.
// The values returned are its hash, ValidUntilBlock value and error if any.
func (c *Contract) Update(nef []byte, manifest string) (util.Uint256, uint32, error) {
	return c.actor.SendCall(Hash, "update", nef, manifest)
}

// UpdateTransaction creates a transaction invoking `update` method of the contract.
// This transaction is signed, but not sent to the network, instead it's
// returned to the caller.
func (c *Contract) UpdateTransaction(nef []byte, manifest string) (*transaction.Transaction, error) {
	return c.actor.MakeCall(Hash, "update", nef, manifest)
}

// UpdateUnsigned creates a transaction invoking `update` method of the contract.
// This transaction is not signed, it's simply returned to the caller.
// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
func (c *Contract) UpdateUnsigned(nef []byte, manifest string) (*transaction.Transaction, error) {
	return c.actor.MakeUnsignedCall(Hash, "update", nil, nef, manifest)
}

// AddRoot creates a transaction invoking `addRoot` method of the contract.
// This transaction is signed and immediately sent to the network.
// The values returned are its hash, ValidUntilBlock value and error if any.
func (c *Contract) AddRoot(root string) (util.Uint256, uint32, error) {
	return c.actor.SendCall(Hash, "addRoot", root)
}

// AddRootTransaction creates a transaction invoking `addRoot` method of the contract.
// This transaction is signed, but not sent to the network, instead it's
// returned to the caller.
func (c *Contract) AddRootTransaction(root string) (*transaction.Transaction, error) {
	return c.actor.MakeCall(Hash, "addRoot", root)
}

// AddRootUnsigned creates a transaction invoking `addRoot` method of the contract.
// This transaction is not signed, it's simply returned to the caller.
// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
func (c *Contract) AddRootUnsigned(root string) (*transaction.Transaction, error) {
	return c.actor.MakeUnsignedCall(Hash, "addRoot", nil, root)
}

// SetPrice creates a transaction invoking `setPrice` method of the contract.
// This transaction is signed and immediately sent to the network.
// The values returned are its hash, ValidUntilBlock value and error if any.
func (c *Contract) SetPrice(priceList []interface{}) (util.Uint256, uint32, error) {
	return c.actor.SendCall(Hash, "setPrice", priceList)
}

// SetPriceTransaction creates a transaction invoking `setPrice` method of the contract.
// This transaction is signed, but not sent to the network, instead it's
// returned to the caller.
func (c *Contract) SetPriceTransaction(priceList []interface{}) (*transaction.Transaction, error) {
	return c.actor.MakeCall(Hash, "setPrice", priceList)
}

// SetPriceUnsigned creates a transaction invoking `setPrice` method of the contract.
// This transaction is not signed, it's simply returned to the caller.
// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
func (c *Contract) SetPriceUnsigned(priceList []interface{}) (*transaction.Transaction, error) {
	return c.actor.MakeUnsignedCall(Hash, "setPrice", nil, priceList)
}

func scriptForRegister(name string, owner util.Uint160) ([]byte, error) {
	return smartcontract.CreateCallWithAssertScript(Hash, "register", name, owner)
}

// Register creates a transaction invoking `register` method of the contract.
// This transaction is signed and immediately sent to the network.
// The values returned are its hash, ValidUntilBlock value and error if any.
func (c *Contract) Register(name string, owner util.Uint160) (util.Uint256, uint32, error) {
	script, err := scriptForRegister(name, owner)
	if err != nil {
		return util.Uint256{}, 0, err
	}
	return c.actor.SendRun(script)
}

// RegisterTransaction creates a transaction invoking `register` method of the contract.
// This transaction is signed, but not sent to the network, instead it's
// returned to the caller.
func (c *Contract) RegisterTransaction(name string, owner util.Uint160) (*transaction.Transaction, error) {
	script, err := scriptForRegister(name, owner)
	if err != nil {
		return nil, err
	}
	return c.actor.MakeRun(script)
}

// RegisterUnsigned creates a transaction invoking `register` method of the contract.
// This transaction is not signed, it's simply returned to the caller.
// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
func (c *Contract) RegisterUnsigned(name string, owner util.Uint160) (*transaction.Transaction, error) {
	script, err := scriptForRegister(name, owner)
	if err != nil {
		return nil, err
	}
	return c.actor.MakeUnsignedRun(script, nil)
}

// Renew creates a transaction invoking `renew` method of the contract.
// This transaction is signed and immediately sent to the network.
// The values returned are its hash, ValidUntilBlock value and error if any.
func (c *Contract) Renew(name string) (util.Uint256, uint32, error) {
	return c.actor.SendCall(Hash, "renew", name)
}

// RenewTransaction creates a transaction invoking `renew` method of the contract.
// This transaction is signed, but not sent to the network, instead it's
// returned to the caller.
func (c *Contract) RenewTransaction(name string) (*transaction.Transaction, error) {
	return c.actor.MakeCall(Hash, "renew", name)
}

// RenewUnsigned creates a transaction invoking `renew` method of the contract.
// This transaction is not signed, it's simply returned to the caller.
// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
func (c *Contract) RenewUnsigned(name string) (*transaction.Transaction, error) {
	return c.actor.MakeUnsignedCall(Hash, "renew", nil, name)
}

// Renew_2 creates a transaction invoking `renew` method of the contract.
// This transaction is signed and immediately sent to the network.
// The values returned are its hash, ValidUntilBlock value and error if any.
func (c *Contract) Renew_2(name string, years *big.Int) (util.Uint256, uint32, error) {
	return c.actor.SendCall(Hash, "renew", name, years)
}

// Renew_2Transaction creates a transaction invoking `renew` method of the contract.
// This transaction is signed, but not sent to the network, instead it's
// returned to the caller.
func (c *Contract) Renew_2Transaction(name string, years *big.Int) (*transaction.Transaction, error) {
	return c.actor.MakeCall(Hash, "renew", name, years)
}

// Renew_2Unsigned creates a transaction invoking `renew` method of the contract.
// This transaction is not signed, it's simply returned to the caller.
// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
func (c *Contract) Renew_2Unsigned(name string, years *big.Int) (*transaction.Transaction, error) {
	return c.actor.MakeUnsignedCall(Hash, "renew", nil, name, years)
}

// SetAdmin creates a transaction invoking `setAdmin` method of the contract.
// This transaction is signed and immediately sent to the network.
// The values returned are its hash, ValidUntilBlock value and error if any.
func (c *Contract) SetAdmin(name string, admin util.Uint160) (util.Uint256, uint32, error) {
	return c.actor.SendCall(Hash, "setAdmin", name, admin)
}

// SetAdminTransaction creates a transaction invoking `setAdmin` method of the contract.
// This transaction is signed, but not sent to the network, instead it's
// returned to the caller.
func (c *Contract) SetAdminTransaction(name string, admin util.Uint160) (*transaction.Transaction, error) {
	return c.actor.MakeCall(Hash, "setAdmin", name, admin)
}

// SetAdminUnsigned creates a transaction invoking `setAdmin` method of the contract.
// This transaction is not signed, it's simply returned to the caller.
// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
func (c *Contract) SetAdminUnsigned(name string, admin util.Uint160) (*transaction.Transaction, error) {
	return c.actor.MakeUnsignedCall(Hash, "setAdmin", nil, name, admin)
}

// SetRecord creates a transaction invoking `setRecord` method of the contract.
// This transaction is signed and immediately sent to the network.
// The values returned are its hash, ValidUntilBlock value and error if any.
func (c *Contract) SetRecord(name string, typev *big.Int, data string) (util.Uint256, uint32, error) {
	return c.actor.SendCall(Hash, "setRecord", name, typev, data)
}

// SetRecordTransaction creates a transaction invoking `setRecord` method of the contract.
// This transaction is signed, but not sent to the network, instead it's
// returned to the caller.
func (c *Contract) SetRecordTransaction(name string, typev *big.Int, data string) (*transaction.Transaction, error) {
	return c.actor.MakeCall(Hash, "setRecord", name, typev, data)
}

// SetRecordUnsigned creates a transaction invoking `setRecord` method of the contract.
// This transaction is not signed, it's simply returned to the caller.
// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
func (c *Contract) SetRecordUnsigned(name string, typev *big.Int, data string) (*transaction.Transaction, error) {
	return c.actor.MakeUnsignedCall(Hash, "setRecord", nil, name, typev, data)
}

// DeleteRecord creates a transaction invoking `deleteRecord` method of the contract.
// This transaction is signed and immediately sent to the network.
// The values returned are its hash, ValidUntilBlock value and error if any.
func (c *Contract) DeleteRecord(name string, typev *big.Int) (util.Uint256, uint32, error) {
	return c.actor.SendCall(Hash, "deleteRecord", name, typev)
}

// DeleteRecordTransaction creates a transaction invoking `deleteRecord` method of the contract.
// This transaction is signed, but not sent to the network, instead it's
// returned to the caller.
func (c *Contract) DeleteRecordTransaction(name string, typev *big.Int) (*transaction.Transaction, error) {
	return c.actor.MakeCall(Hash, "deleteRecord", name, typev)
}

// DeleteRecordUnsigned creates a transaction invoking `deleteRecord` method of the contract.
// This transaction is not signed, it's simply returned to the caller.
// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
func (c *Contract) DeleteRecordUnsigned(name string, typev *big.Int) (*transaction.Transaction, error) {
	return c.actor.MakeUnsignedCall(Hash, "deleteRecord", nil, name, typev)
}