package neorpc

import (
	"github.com/nspcc-dev/neo-go/pkg/util"
)

type (
	// BlockFilter is a wrapper structure for the block event filter. It allows
	// to filter blocks by primary index and/or by block index (allowing blocks
	// since/till the specified index inclusively). nil value treated as missing
	// filter.
	BlockFilter struct {
		Primary *int    `json:"primary,omitempty"`
		Since   *uint32 `json:"since,omitempty"`
		Till    *uint32 `json:"till,omitempty"`
	}
	// TxFilter is a wrapper structure for the transaction event filter. It
	// allows to filter transactions by senders and/or signers. nil value treated
	// as missing filter.
	TxFilter struct {
		Sender *util.Uint160 `json:"sender,omitempty"`
		Signer *util.Uint160 `json:"signer,omitempty"`
	}
	// NotificationFilter is a wrapper structure representing a filter used for
	// notifications generated during transaction execution. Notifications can
	// be filtered by contract hash and/or by name. nil value treated as missing
	// filter.
	NotificationFilter struct {
		Contract *util.Uint160 `json:"contract,omitempty"`
		Name     *string       `json:"name,omitempty"`
	}
	// ExecutionFilter is a wrapper structure used for transaction and persisting
	// scripts execution events. It allows to choose failing or successful
	// transactions and persisting scripts based on their VM state and/or to
	// choose execution event with the specified container. nil value treated as
	// missing filter.
	ExecutionFilter struct {
		State     *string       `json:"state,omitempty"`
		Container *util.Uint256 `json:"container,omitempty"`
	}
)

// Copy creates a deep copy of the BlockFilter. It handles nil BlockFilter correctly.
func (f *BlockFilter) Copy() *BlockFilter {
	if f == nil {
		return nil
	}
	var res = new(BlockFilter)
	if f.Primary != nil {
		res.Primary = new(int)
		*res.Primary = *f.Primary
	}
	if f.Since != nil {
		res.Since = new(uint32)
		*res.Since = *f.Since
	}
	if f.Till != nil {
		res.Till = new(uint32)
		*res.Till = *f.Till
	}
	return res
}

// Copy creates a deep copy of the TxFilter. It handles nil TxFilter correctly.
func (f *TxFilter) Copy() *TxFilter {
	if f == nil {
		return nil
	}
	var res = new(TxFilter)
	if f.Sender != nil {
		res.Sender = new(util.Uint160)
		*res.Sender = *f.Sender
	}
	if f.Signer != nil {
		res.Signer = new(util.Uint160)
		*res.Signer = *f.Signer
	}
	return res
}

// Copy creates a deep copy of the NotificationFilter. It handles nil NotificationFilter correctly.
func (f *NotificationFilter) Copy() *NotificationFilter {
	if f == nil {
		return nil
	}
	var res = new(NotificationFilter)
	if f.Contract != nil {
		res.Contract = new(util.Uint160)
		*res.Contract = *f.Contract
	}
	if f.Name != nil {
		res.Name = new(string)
		*res.Name = *f.Name
	}
	return res
}

// Copy creates a deep copy of the ExecutionFilter. It handles nil ExecutionFilter correctly.
func (f *ExecutionFilter) Copy() *ExecutionFilter {
	if f == nil {
		return nil
	}
	var res = new(ExecutionFilter)
	if f.State != nil {
		res.State = new(string)
		*res.State = *f.State
	}
	if f.Container != nil {
		res.Container = new(util.Uint256)
		*res.Container = *f.Container
	}
	return res
}