use clap::{Parser, Subcommand};
use craftlabs_auth_core::{
    craft_activate, craft_check_license, craft_destroy, craft_free_license_info,
    craft_get_license_info, craft_heartbeat, craft_initialize, craft_release,
};
use craftlabs_auth_core::device;
use std::ffi::CString;
use std::path::PathBuf;
use std::fs;

mod config;
mod platform_api;

use config::Config;
use platform_api::PlatformClient;

#[derive(Parser)]
#[command(name = "craft", version, about = "CraftLabs 授权客户端")]
struct Cli {
    #[command(subcommand)]
    command: Commands,
    /// 平台 API 地址 (默认: http://localhost:8080)
    #[arg(long, global = true)]
    api: Option<String>,
    /// JSON 格式输出
    #[arg(long, global = true)]
    json: bool,
}

#[derive(Subcommand)]
enum Commands {
    /// 查看本地授权状态
    Status,
    /// 使用 SN 激活本机
    Activate { sn: String },
    /// 检查授权是否有效
    Check,
    /// 显示授权详情
    Info,
    /// 撤销本机授权
    Release,
    /// 迁移授权到本机 (释放旧授权 + 激活新 SN)
    Migrate { sn: String },
    /// 显示本机设备指纹
    DeviceId,
    /// 手动触发心跳
    Heartbeat,
    /// 查看/修改配置
    Config {
        /// 查看或设置: status, set-api <url>, set-sn <sn>
        action: Vec<String>,
    },
}

fn get_config_path() -> PathBuf {
    let mut path = dirs::config_dir().unwrap_or_else(|| PathBuf::from("."));
    path.push("craftlabs");
    fs::create_dir_all(&path).ok();
    path.join("config.json")
}

fn main() {
    let cli = Cli::parse();
    let config_path = get_config_path();
    let mut config = Config::load(&config_path);

    if let Some(api_url) = &cli.api {
        config.api_base_url = api_url.clone();
    }

    let rt = tokio::runtime::Runtime::new().unwrap();

    match &cli.command {
        Commands::Status => {
            print_status(&config, cli.json);
        }
        Commands::Activate { sn } => {
            let handle = init_engine();
            if handle.is_null() {
                eprintln!("错误: 初始化授权引擎失败");
                std::process::exit(1);
            }
            let c_sn = CString::new(sn.as_str()).unwrap();
            let result = craft_activate(handle, c_sn.as_ptr(), std::ptr::null());
            if result.success != 0 {
                println!("OK: 激活成功");
                config.sn = Some(sn.clone());
                config.save(&config_path);
                rt.block_on(sync_activation(&config, sn));
            } else {
                let msg = if result.message.is_null() { "未知错误" } else {
                    unsafe { std::ffi::CStr::from_ptr(result.message) }.to_str().unwrap_or("未知错误")
                };
                eprintln!("错误: 激活失败 - {}", msg);
            }
            craft_destroy(handle);
        }
        Commands::Check => {
            let handle = init_engine();
            if handle.is_null() { eprintln!("错误: 初始化失败"); return; }
            let result = craft_check_license(handle);
            if cli.json {
                let msg = if !result.message.is_null() {
                    unsafe { std::ffi::CStr::from_ptr(result.message) }.to_str().unwrap_or("")
                } else { "" };
                println!("{{\"status\":{},\"message\":\"{}\"}}", result.success, msg);
            } else {
                println!("授权状态: {}", if result.success != 0 { "有效" } else { "无效" });
            }
            craft_destroy(handle);
        }
        Commands::Info => {
            let handle = init_engine();
            if handle.is_null() { eprintln!("错误: 初始化失败"); return; }
            let info_ptr = craft_get_license_info(handle);
            if !info_ptr.is_null() {
                let info = unsafe { &*info_ptr };
                println!("授权状态: {}", if info.is_licensed != 0 { "已授权" } else { "未授权" });
                if info.expiration_date > 0 {
                    println!("过期时间戳: {}", info.expiration_date);
                }
                if info.feature_count > 0 {
                    println!("功能特性 ({}):", info.feature_count);
                    let names = unsafe { std::slice::from_raw_parts(info.feature_names, info.feature_count as usize) };
                    let values = unsafe { std::slice::from_raw_parts(info.feature_values, info.feature_count as usize) };
                    for idx in 0..info.feature_count as usize {
                        let name = if idx < names.len() && !names[idx].is_null() {
                            unsafe { std::ffi::CStr::from_ptr(names[idx]) }
                                .to_str().unwrap_or("?")
                        } else { "?" };
                        let val = if idx < values.len() { values[idx] } else { 0 };
                        println!("  {}: {}", name, if val != 0 { "ON" } else { "OFF" });
                    }
                }
                craft_free_license_info(info_ptr);
            } else {
                println!("无法获取授权信息");
            }
            craft_destroy(handle);
        }
        Commands::Release => {
            let handle = init_engine();
            if handle.is_null() { eprintln!("错误: 初始化失败"); return; }
            let result = craft_release(handle);
            if result.success != 0 {
                println!("OK: 授权已撤销");
                config.sn = None;
                config.save(&config_path);
            } else {
                eprintln!("错误: 撤销失败");
            }
            craft_destroy(handle);
        }
        Commands::Migrate { sn } => {
            println!("正在迁移授权到新 SN: {} ...", sn);
            let handle = init_engine();
            if handle.is_null() { eprintln!("错误: 初始化失败"); return; }
            craft_release(handle);
            craft_destroy(handle);

            let handle = init_engine();
            if handle.is_null() { eprintln!("错误: 初始化失败"); return; }
            let c_sn = CString::new(sn.as_str()).unwrap();
            let result = craft_activate(handle, c_sn.as_ptr(), std::ptr::null());
            if result.success != 0 {
                println!("OK: 迁移成功");
                config.sn = Some(sn.clone());
                config.save(&config_path);
            } else {
                eprintln!("错误: 迁移失败");
            }
            craft_destroy(handle);
        }
        Commands::DeviceId => {
            let fp = device::collect();
            if cli.json {
                println!("{{\"device_id\":\"{}\"}}", fp.composite_hash);
            } else {
                println!("设备指纹: {}", fp.composite_hash);
            }
        }
        Commands::Heartbeat => {
            let handle = init_engine();
            if handle.is_null() { eprintln!("错误: 初始化失败"); return; }
            let result = craft_heartbeat(handle);
            println!("心跳: {}", if result.success != 0 { "OK" } else { "FAIL" });
            craft_destroy(handle);
        }
        Commands::Config { action } => {
            handle_config(action, &mut config, &config_path);
        }
    }
}

fn init_engine() -> *mut craftlabs_auth_core::CraftContext {
    let config_json = r#"{"provider":"selfhosted","schemaVersion":1,"scenario":"floating"}"#;
    let c = CString::new(config_json).unwrap();
    craft_initialize(c.as_ptr())
}

fn print_status(config: &Config, json: bool) {
    let handle = init_engine();
    if handle.is_null() { eprintln!("错误: 初始化失败"); return; }
    let result = craft_check_license(handle);
    let fp = device::collect();
    if json {
        println!("{{\"licensed\":{},\"device_id\":\"{}\",\"api\":\"{}\",\"sn\":{}}}",
            result.success, fp.composite_hash, config.api_base_url,
            config.sn.as_deref().map(|s| format!("\"{}\"", s)).unwrap_or("null".into()));
    } else {
        println!("授权状态: {}", if result.success != 0 { "有效" } else { "无效" });
        println!("设备指纹: {}", fp.composite_hash);
        println!("API 地址: {}", config.api_base_url);
        if let Some(sn) = &config.sn {
            println!("绑定 SN: {}", sn);
        }
    }
    craft_destroy(handle);
}

fn handle_config(action: &[String], config: &mut Config, path: &PathBuf) {
    if action.is_empty() {
        println!("API 地址: {}", config.api_base_url);
        println!("绑定 SN: {}", config.sn.as_deref().unwrap_or("(无)"));
        println!("配置路径: {}", path.display());
        return;
    }
    match action[0].as_str() {
        "set-api" if action.len() > 1 => {
            config.api_base_url = action[1].clone();
            config.save(path);
            println!("OK: API 地址已更新");
        }
        "set-sn" if action.len() > 1 => {
            config.sn = Some(action[1].clone());
            config.save(path);
            println!("OK: SN 已设置");
        }
        _ => eprintln!("用法: craft config [set-api <url>|set-sn <sn>]"),
    }
}

async fn sync_activation(config: &Config, sn: &str) {
    let client = PlatformClient::new(&config.api_base_url);
    match client.report_activation(sn, &device::collect().composite_hash).await {
        Ok(_) => println!("平台同步成功"),
        Err(e) => eprintln!("平台同步失败: {} (不影响本地授权)", e),
    }
}