class TransferUtils {
    static parseCSV(csvText) {
        const lines = csvText.split('\n');
        const transfers = [];
        
        for (let i = 0; i < lines.length; i++) {
            const line = lines[i].trim();
            if (!line) continue;
            
            // 支持逗号分隔或制表符分隔
            const parts = line.includes('\t') ? line.split('\t') : line.split(',');
            
            if (parts.length >= 2) {
                const address = parts[0].trim();
                const amount = parts[1].trim();
                const note = parts[2] ? parts[2].trim() : '';
                
                // 基本验证
                if (address && amount) {
                    transfers.push({
                        address,
                        amount: parseFloat(amount),
                        note
                    });
                }
            }
        }
        
        return transfers;
    }

    static formatAddress(address) {
        if (!address || address.length < 10) return address;
        return `${address.slice(0, 6)}...${address.slice(-4)}`;
    }

    static formatNumber(num, decimals = 4) {
        if (isNaN(num)) return '0';
        return parseFloat(num.toFixed(decimals)).toString();
    }

    static generateLogMessage(type, message) {
        const time = new Date().toLocaleTimeString();
        const types = {
            success: { icon: '✅', class: 'success' },
            error: { icon: '❌', class: 'error' },
            info: { icon: 'ℹ️', class: 'info' },
            warning: { icon: '⚠️', class: 'warning' }
        };
        
        const typeInfo = types[type] || types.info;
        
        return {
            time,
            type: typeInfo.class,
            message: `${typeInfo.icon} ${message}`,
            html: `
                <div class="log-item ${typeInfo.class}">
                    <div class="log-time">${time}</div>
                    <div class="log-message">${typeInfo.icon} ${message}</div>
                </div>
            `
        };
    }

    static exportToCSV(data, filename = 'transfer-results.csv') {
        const headers = ['序号', '收款地址', '金额(BNB)', '状态', '交易哈希', '备注'];
        const rows = data.map(item => [
            item.index + 1,
            item.to,
            item.amount,
            item.success ? '成功' : '失败',
            item.hash || '',
            item.error || ''
        ]);
        
        const csvContent = [headers, ...rows]
            .map(row => row.map(cell => `"${cell}"`).join(','))
            .join('\n');
        
        const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
        const link = document.createElement('a');
        
        if (navigator.msSaveBlob) {
            navigator.msSaveBlob(blob, filename);
        } else {
            link.href = URL.createObjectURL(blob);
            link.download = filename;
            link.style.display = 'none';
            document.body.appendChild(link);
            link.click();
            document.body.removeChild(link);
        }
    }

    static validateEthereumAddress(address) {
        try {
            return ethers.utils.isAddress(address);
        } catch {
            return false;
        }
    }

    static async checkBalanceSufficient(provider, address, requiredAmount) {
        try {
            const balance = await provider.getBalance(address);
            const required = ethers.utils.parseEther(requiredAmount.toString());
            return balance.gte(required);
        } catch (error) {
            console.error('检查余额失败:', error);
            return false;
        }
    }
}

// 导出工具类
window.TransferUtils = TransferUtils;