package wallet

import (
	"math/big"

	"github.com/ethereum/go-ethereum/common"
)

// EventType type for event types.
type EventType string

const (
	// EventNewBlock emitted when new block was added to the same canonical chan.
	EventNewBlock      EventType = "newblock"
	EventMaxKnownBlock EventType = "maxKnownBlock"
	// EventReorg emitted when canonical chain was changed. In this case, BlockNumber will be an earliest added block.
	EventReorg EventType = "reorg"
	// EventNewHistory emitted if transfer from older block was added.
	EventNewHistory EventType = "history"
	// EventFetchingRecentHistory emitted when fetching of lastest tx history is started
	EventFetchingRecentHistory EventType = "recent-history-fetching"
	// EventRecentHistoryFetched emitted when fetching of lastest tx history is started
	EventRecentHistoryReady EventType = "recent-history-ready"
	// EventRecentHistoryError emitted when fetching of tx history failed
	EventFetchingHistoryError EventType = "fetching-history-error"
	// EventNonArchivalNodeDetected emitted when a connection to a non archival node is detected
	EventNonArchivalNodeDetected EventType = "non-archival-node-detected"
)

// Event is a type for wallet events.
type Event struct {
	Type                      EventType              `json:"type"`
	BlockNumber               *big.Int               `json:"blockNumber"`
	Accounts                  []common.Address       `json:"accounts"`
	NewTransactionsPerAccount map[common.Address]int `json:"newTransactions"`
	ERC20                     bool                   `json:"erc20"`
	Message                   string                 `json:"message"`
}