package eth

import (
	"context"
	"fmt"
	"log"
	"m2pool-payment/internal/db"
	"m2pool-payment/internal/listen"
	message "m2pool-payment/internal/msg"
	"math/big"
	"sync"

	"github.com/ethereum/go-ethereum/accounts/abi"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/ethereum/go-ethereum/ethclient"
)

type ETHNode struct {
	decodeKey     string // 消息解密密钥，用于解密RMQ消息的Sign
	NetID         *big.Int
	Config        message.ETHConfig
	ConfirmHeight uint64
	WsClient      *ethclient.Client
	RpcClient     *ethclient.Client
	MysqlDB       *db.MySQLPool
	SqliteDB      *db.SQLite
	USDT          *USDT
	NetInfo       *NetInfo // 网络通用状态(当前高度、gas费用等)
	// Messages       map[string]any                  // {"queue_id": message.Topup{}, "queue_id": message.Withdraw{}, ...}
	MessageServer  *listen.ListenServer
	UnConfirmedTxs *UnConfirmedTxs
	Wallets        map[string]*Wallets // {"address" : &Wallets{}, ...}
	LogsChan       chan *types.Header
	Ctx            context.Context
	Cancel         context.CancelFunc
	mu             sync.Mutex
}

type USDT struct {
	Address            common.Address // USDT合约地址
	ListeningAddresses map[string]any // 监听的USDT转账消息
	ABI                abi.ABI        // USDT ABI
	TransferSig        common.Hash    // USDT函数签名
	LogsChan           chan types.Log
}

type UnConfirmedTxs struct {
	mu           sync.Mutex
	Transactions map[string]message.Transaction // {"queue_id": message.Transactions{}, ...}
}

type NetInfo struct {
	mu        sync.Mutex
	Height    uint64
	GasLimit  uint64
	GasTipCap *big.Int
	GasFeeCap *big.Int
	GasPrice  *big.Int // 老版本转账使用的gas
}

type Wallets struct {
	address      string
	queueId      string
	pk           string
	eth_balance  *eth_balance
	usdt_balance *usdt_balance
	timestamp    uint64
	sign         string
	status       int
	mu           sync.Mutex
}

type eth_balance struct {
	symbol            string   // 默认ETH
	used_gas          *big.Int // 1 ETH = 1e18 WEI
	balance           *big.Int // 实际拥有的ETH余额
	successed_tx_hash []string
	failed_tx_hash    []string
}

type usdt_balance struct {
	symbol            string
	freeze_num        *big.Int // 1 USDT = 1e6 WEI
	balance           *big.Int // 实际拥有的USDT余额
	successed_tx_hash []string
	failed_tx_hash    []string
}

func NewETHNode(cfg message.Config, decodeKey string, l *listen.ListenServer) (*ETHNode, error) {
	// 连入ETH节点的ws
	ws_client, err := ethclient.Dial(cfg.ETHConfig.WsUrl)
	if err != nil {
		return nil, fmt.Errorf("failed to connect to Ethereum node: %w", err)
	}
	// 连入ETH节点的rpc
	rpc_client, err := ethclient.Dial(cfg.ETHConfig.RpcUrl)
	if err != nil {
		return nil, fmt.Errorf("failed to connect to Ethereum node rpc: %w", err)
	}
	// 创建可取消的 context
	ctx, cancel := context.WithCancel(context.Background())

	// 获得net_id
	netId, err := rpc_client.NetworkID(ctx)
	if err != nil {
		cancel()
		return nil, fmt.Errorf("failed to connect to get node net_id: %w", err)
	}

	// 初始化MySQL数据库
	dbConn, err := db.NewMySQLPool(cfg.MysqlConfig["wallet"])
	if err != nil {
		cancel()
		return nil, fmt.Errorf("mysql connect error: %w", err)
	}

	// 初始化SQLite3
	sqlite, err := db.NewSQLite(cfg.ETHConfig.SqlitePath)
	if err != nil {
		cancel()
		return nil, fmt.Errorf("sqlite3 connect error: %w", err)
	}
	logchan := make(chan *types.Header)
	// 初始化USDT
	usdt := init_USDT()
	ethnode := &ETHNode{
		decodeKey:     decodeKey,
		NetID:         netId,
		Config:        cfg.ETHConfig,
		ConfirmHeight: cfg.ETHConfig.ConfirmHeight,
		WsClient:      ws_client,
		RpcClient:     rpc_client,
		USDT:          usdt,
		MysqlDB:       dbConn,
		SqliteDB:      sqlite,
		NetInfo:       &NetInfo{},
		UnConfirmedTxs: &UnConfirmedTxs{
			Transactions: make(map[string]message.Transaction),
		},
		Wallets:       make(map[string]*Wallets),
		MessageServer: l,
		LogsChan:      logchan,
		Ctx:           ctx,
		Cancel:        cancel,
	}
	// 初始化表
	// err = ethnode.MysqlDB.ExecuteSQLFile("../public/eth_mysql.sql")
	// if err != nil {
	// 	log.Fatalf("ETH-Chain初始化数据库表失败：%v", err)
	// }
	// 更新网络公共数据和加载钱包
	height, err := ethnode.getHeight()
	if err != nil {
		return nil, fmt.Errorf("failed to get blockHeight: %v", err)
	}
	// 更新网络公共数据
	ethnode.updateNetInfo(height)
	// 加载钱包
	if err := ethnode.loadWallets(); err != nil {
		return nil, fmt.Errorf("[inital eth wallets]: %v", err)
	}
	// 加载未确认交易
	if err := ethnode.loadUnConfirmedTxs(); err != nil {
		return nil, fmt.Errorf("load unconfirmtxs error: %v", err)
	}
	log.Println("✅ ETH节点已启动")
	// ethnode.handleHistoryETHEvent(23795552)
	return ethnode, nil
}

// 转账
func (e *ETHNode) Transfer(from, to, symbol string, amount, fee float64) error {
	// 执行转账
	err := e.handleTx(symbol, from, to, amount)
	if err != nil {
		return fmt.Errorf("%s-tranfer error: %v", symbol, err)
	}
	return nil
}

// 监听消息
func (e *ETHNode) ListenMsg() {
	log.Printf("✅ 开始监听msg...")
	if e.MessageServer.ChToChainServer["ETH"] == nil {
		log.Printf("ETH消息通道还未建立")
		return
	}

	for msg := range e.MessageServer.ChToChainServer["ETH"] {
		switch v := msg.(type) {
		case message.TopupMsg_req:
			go e.handleListen_Topup_req(v)
		case message.WithdrawMsg_req:
			go e.handleListen_Withdraw_req(v)
		case message.PayMsg_req:
			go e.handleListen_Pay_req(v)
		case message.RemoveListenMsg_req:
			go e.handleListen_Remove_req(v)
		default:
			log.Printf("ListenMsg error: %v", msg)
		}
	}
}

// 监听区块链数据
func (e *ETHNode) Listen() error {
	log.Println("✅ 开始监听 ETH 和 USDT 转账事件...")
	go func() {
		err := e.listenETHTransactions()
		if err != nil {
			log.Printf("Listen ETH Transactions Error: %v", err)
		}
	}()

	go func() {
		err := e.listenUSDTTransactions()
		if err != nil {
			log.Printf("Listen USDT Transactions Error: %v", err)
		}
	}()

	return nil
}

func (e *ETHNode) Stop() {
	if e.Cancel != nil {
		e.Cancel()
	}
	log.Println("🛑 停止监听...")
}