use crate::cli::*;
use crate::client::nac_lens::NacLensClient;
use crate::config::Config;
use crate::error::{CliError, Result};
use crate::utils::*;
use colored::Colorize;

pub async fn execute(cmd: &NodeCommands, _cli: &Cli) -> Result<()> {
    match cmd {
        NodeCommands::Info => show_node_info().await,
        NodeCommands::Status => show_node_status().await,
        NodeCommands::Peers => list_peers().await,
        NodeCommands::Sync => show_sync_status().await,
    }
}

async fn show_node_info() -> Result<()> {
    let config = Config::load()
        .map_err(|_| CliError::Config("未找到配置文件，请先运行 'nac config init'".to_string()))?;
    let client = NacLensClient::new(config.get_current_rpc_url());
    
    print_info("查询节点信息...");
    let info = client.get_node_info().await?;
    
    println!();
    println!("{}", "节点信息".bold());
    println!("{}", "=".repeat(80));
    println!();
    println!("{}", serde_json::to_string_pretty(&info).unwrap_or_default());
    println!();
    
    Ok(())
}

async fn show_node_status() -> Result<()> {
    let config = Config::load()
        .map_err(|_| CliError::Config("未找到配置文件，请先运行 'nac config init'".to_string()))?;
    let client = NacLensClient::new(config.get_current_rpc_url());
    
    print_info("查询节点状态...");
    let health = client.get_node_health().await?;
    
    println!();
    println!("{}", "节点状态".bold());
    println!("{}", "=".repeat(80));
    println!();
    println!("{}", serde_json::to_string_pretty(&health).unwrap_or_default());
    println!();
    
    Ok(())
}

async fn list_peers() -> Result<()> {
    let config = Config::load()
        .map_err(|_| CliError::Config("未找到配置文件，请先运行 'nac config init'".to_string()))?;
    let client = NacLensClient::new(config.get_current_rpc_url());
    
    print_info("查询对等节点...");
    let peers = client.get_peers().await?;
    
    println!();
    println!("{}", format!("对等节点列表 (共{}个)", peers.len()).bold());
    println!("{}", "=".repeat(80));
    println!();
    
    for (i, peer) in peers.iter().enumerate() {
        println!("{}. {}", i + 1, serde_json::to_string_pretty(peer).unwrap_or_default());
    }
    
    println!();
    Ok(())
}

async fn show_sync_status() -> Result<()> {
    let config = Config::load()
        .map_err(|_| CliError::Config("未找到配置文件，请先运行 'nac config init'".to_string()))?;
    let client = NacLensClient::new(config.get_current_rpc_url());
    
    print_info("查询同步状态...");
    
    // 获取当前区块高度
    let height = client.get_block_height().await?;
    let peer_count = client.get_peer_count().await?;
    
    println!();
    println!("{}", "同步状态".bold());
    println!("{}", "=".repeat(80));
    println!();
    println!("  {:18} {}", "当前区块高度:", height.to_string().cyan());
    println!("  {:18} {}", "对等节点数:", peer_count.to_string().cyan());
    println!();
    
    Ok(())
}