// NAC Smart Contract Deployment Tool
// 用于部署和管理Charter智能合约

use clap::{Parser, Subcommand};
use std::path::PathBuf;
use std::fs;

#[derive(Parser)]
#[command(name = "nac-deploy")]
#[command(about = "NAC Smart Contract Deployment Tool", long_about = None)]
struct Cli {
    #[command(subcommand)]
    command: Commands,
}

#[derive(Subcommand)]
enum Commands {
    /// 部署Charter智能合约
    Deploy {
        /// Charter合约源文件路径
        #[arg(short, long)]
        contract: PathBuf,
        
        /// 部署者钱包地址
        #[arg(short, long)]
        from: String,
        
        /// NAC节点RPC地址
        #[arg(short, long, default_value = "http://localhost:8545")]
        rpc: String,
        
        /// 构造函数参数（JSON格式）
        #[arg(short, long)]
        args: Option<String>,
    },
    
    /// 调用合约方法
    Call {
        /// 合约地址
        #[arg(short, long)]
        contract: String,
        
        /// 方法名
        #[arg(short, long)]
        method: String,
        
        /// 方法参数（JSON格式）
        #[arg(short, long)]
        args: Option<String>,
        
        /// 调用者地址
        #[arg(short, long)]
        from: String,
        
        /// NAC节点RPC地址
        #[arg(short, long, default_value = "http://localhost:8545")]
        rpc: String,
    },
    
    /// 查询合约状态
    Query {
        /// 合约地址
        #[arg(short, long)]
        contract: String,
        
        /// 方法名
        #[arg(short, long)]
        method: String,
        
        /// 方法参数（JSON格式）
        #[arg(short, long)]
        args: Option<String>,
        
        /// NAC节点RPC地址
        #[arg(short, long, default_value = "http://localhost:8545")]
        rpc: String,
    },
    
    /// 编译Charter合约
    Compile {
        /// Charter合约源文件路径
        #[arg(short, long)]
        input: PathBuf,
        
        /// 输出NVM字节码路径
        #[arg(short, long)]
        output: PathBuf,
    },
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    env_logger::init();
    
    let cli = Cli::parse();
    
    match cli.command {
        Commands::Deploy { contract, from, rpc, args } => {
            println!("🚀 部署合约: {:?}", contract);
            println!("   部署者: {}", from);
            println!("   RPC: {}", rpc);
            let args_ref = args.as_deref();
            if let Some(a) = args_ref {
                println!("   参数: {}", a);
            }
            deploy_contract(&contract, &from, &rpc, args_ref)?;
        }
        
        Commands::Call { contract, method, args, from, rpc } => {
            println!("📞 调用合约方法");
            println!("   合约: {}", contract);
            println!("   方法: {}", method);
            println!("   调用者: {}", from);
            println!("   RPC: {}", rpc);
            if let Some(args) = &args {
                println!("   参数: {}", args);
            }
            
            call_contract(&contract, &method, args.as_deref(), &from, &rpc)?;
        }
        
        Commands::Query { contract, method, args, rpc } => {
            println!("🔍 查询合约状态");
            println!("   合约: {}", contract);
            println!("   方法: {}", method);
            println!("   RPC: {}", rpc);
            if let Some(args) = &args {
                println!("   参数: {}", args);
            }
            
            query_contract(&contract, &method, args.as_deref(), &rpc)?;
        }
        
        Commands::Compile { input, output } => {
            println!("🔨 编译Charter合约");
            println!("   输入: {:?}", input);
            println!("   输出: {:?}", output);
            
            compile_contract(&input, &output)?;
        }
    }
    
    Ok(())
}

fn deploy_contract(
    contract_path: &PathBuf,
    _from: &str,
    rpc: &str,
    _args: Option<&str>,
) -> Result<(), Box<dyn std::error::Error>> {
    // 1. 编译合约
    println!("\n📝 步骤1: 编译合约");
    let bytecode_path = contract_path.with_extension("nvm");
    compile_contract(contract_path, &bytecode_path)?;
    
    // 2. 读取字节码
    println!("\n📝 步骤2: 读取字节码");
    let bytecode = fs::read(&bytecode_path)?;
    println!("   字节码大小: {} 字节", bytecode.len());
    println!("   字节码: {}", hex::encode(&bytecode));
    
    // 3. 构造部署交易
    println!("\n📝 步骤3: 构造部署交易");
    println!("   TODO: 实现部署交易构造");
    println!("   - 创建CREATE交易");
    println!("   - 包含字节码和构造函数参数");
    println!("   - 请求宪法收据（CR）");
    
    // 4. 签名交易
    println!("\n📝 步骤4: 签名交易");
    println!("   TODO: 使用钱包签名");
    
    // 5. 广播交易
    println!("\n📝 步骤5: 广播交易到 {}", rpc);
    println!("   TODO: 发送到NAC节点");
    
    // 6. 等待确认
    println!("\n📝 步骤6: 等待交易确认");
    println!("   TODO: 轮询交易状态");
    
    println!("\n✅ 合约部署完成（模拟）");
    println!("   合约地址: 0x1234567890abcdef... (待实现)");
    
    Ok(())
}

fn call_contract(
    _contract: &str,
    _method: &str,
    _args: Option<&str>,
    _from: &str,
    _rpc: &str,
) -> Result<(), Box<dyn std::error::Error>> {
    println!("\n📝 构造合约调用交易");
    println!("   TODO: 实现合约方法调用");
    println!("   - 编码方法调用数据");
    println!("   - 请求宪法收据（CR）");
    println!("   - 签名并广播");
    
    Ok(())
}

fn query_contract(
    _contract: &str,
    _method: &str,
    _args: Option<&str>,
    _rpc: &str,
) -> Result<(), Box<dyn std::error::Error>> {
    println!("\n📝 查询合约状态（只读调用）");
    println!("   TODO: 实现合约查询");
    println!("   - 编码方法调用数据");
    println!("   - 发送eth_call请求");
    println!("   - 解码返回值");
    
    Ok(())
}

fn compile_contract(
    input: &PathBuf,
    output: &PathBuf,
) -> Result<(), Box<dyn std::error::Error>> {
    // 调用Charter编译器
    let compiler_path = "/home/ubuntu/NAC_Clean_Dev/charter-compiler/target/release/charter";
    
    let status = std::process::Command::new(compiler_path)
        .arg("compile")
        .arg("--input")
        .arg(input)
        .arg("--output")
        .arg(output)
        .status()?;
    
    if !status.success() {
        return Err("编译失败".into());
    }
    
    println!("   ✅ 编译成功: {:?}", output);
    Ok(())
}