mod cfg;
mod net;
mod openpgp;
mod pkgtoolkit;
mod router;

use crate::cfg::config::Config;
use crate::net::{http_package::HTTPPackage, i2p_package::I2PPackage};
use crate::pkgtoolkit::Package;
use crate::pkgtoolkit::archive::ArchiveOperations;
use crate::pkgtoolkit::build::BuildOperations;
use crate::pkgtoolkit::git_source::GitSource;
use crate::pkgtoolkit::index::IndexOperations;
use crate::pkgtoolkit::install::InstallOperations;
use crate::router::router::{Emissary, EmissaryConfig, RouterUtils};
use emissary_core::router::Router;
use emissary_util::runtime::tokio::Runtime as TokioRuntime;
use std::sync::Arc;
use tokio::sync::Mutex;

use clap::{Args, Parser, Subcommand};
use std::io::Write;
use std::path::Path;

lazy_static::lazy_static! {
    static ref ROUTER: Arc<Mutex<Option<Router<TokioRuntime>>>> = Arc::new(Mutex::new(None));
}

async fn init_router(
    config: &crate::cfg::config::Config,
) -> Result<(), Box<dyn std::error::Error>> {
    if !config.router.integrated_router {
        return Ok(());
    }

    let router_config = EmissaryConfig {
        storage: Some(std::path::PathBuf::from(&config.router.storage_path)),
        auto_update: Some(config.router.auto_update),
        http_proxy_port: Some(config.router.http_proxy_port),
        socks_proxy_port: Some(config.router.socks_proxy_port),
    };

    let mut router = Emissary::new(router_config);

    // Check if router storage exists and is not empty
    let storage_path = std::path::Path::new(&config.router.storage_path);
    if !storage_path.exists() || storage_path.read_dir()?.next().is_none() {
        log::info!("Router storage is empty, performing initial reseed...");
        router.config().await?;
        router.reseed().await?;
    } else {
        router.config().await?;
    }

    // Start the router and store the Router instance
    let router = router.start().await?;
    *ROUTER.lock().await = Some(router);

    log::info!("Integrated router initialized successfully");
    Ok(())
}

#[derive(Parser)]
struct Cli {
    #[command(subcommand)]
    command: Commands,
}

#[derive(Subcommand)]
enum Commands {
    #[command(about = "Validate .mesk package archive")]
    Validate { path: String },
    #[command(about = "Update all repositories index")]
    Update,
    #[command(about = "Upgrade all packages or a specific package")]
    Upgrade { pkgname: Option<String> },
    #[command(about = "Build package from .mesk ")]
    Build { pkgname: String },
    #[command(about = "Install package from remote or local sources")]
    Install {
        #[arg(help = "Package name or path to local .mesk file")]
        pkgname: String,
        source: Option<String>,
        #[arg(short = 'p', long = "path")]
        #[arg(help = "Install from local .mesk file")]
        path: bool,
        #[command(flatten)]
        args: RemoteInstallArgs,
    },
    #[command(about = "Uninstall package")]
    Uninstall { pkgname: String },
    #[command(about = "Get package source")]
    GetSource { pkgname: String },
    #[command(about = "Generator of config file")]
    DefaultConfig {
        repo: Option<String>,
        cachedir: Option<String>,
        buildir: Option<String>,
        installed_db: Option<String>,
    },
    #[command(about = "Maintaners, links, developers and more info")]
    Credits,
    #[command(about = "Generate index for repository path")]
    GenIndex { path: String },
}

#[derive(Args, Clone)]
#[command(about = "Remote install arguments")]
struct RemoteInstallArgs {
    #[arg(short = 'b', long = "bin")]
    #[arg(help = "Install binary package")]
    bin: bool,

    #[arg(short = 't', long = "http")]
    #[arg(help = "Use non-i2p mirror")]
    http: bool,

    #[arg(short = 'c', long = "clean")]
    #[arg(help = "Clean cache before install")]
    clean: bool,
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let config = crate::cfg::config::Config::parse()?;

    init_router(&config).await?;
    let cli: Cli = Cli::parse();

    let config = Arc::new(config);

    let result = {
        match &cli.command {
            Commands::Validate { path } => {
                println!("Validating {}", path);
                match Package::check(path.to_string()) {
                    Ok(is_valid) => {
                        if is_valid {
                            println!("Package archive is valid.");
                        } else {
                            println!("Package archive is invalid.");
                            return Err(std::io::Error::other("Invalid package archive").into());
                        }
                    }
                    Err(e) => {
                        log::error!("Failed to validate package '{}': {}", path, e);
                        return Err(e.into());
                    }
                }
                return Ok(());
            }
            Commands::Build { pkgname } => {
                println!("Building package from archive: {}", pkgname);

                let path = Path::new(&pkgname);
                if !path.exists() {
                    return Err(std::io::Error::other(format!(
                        "Package archive not found: {}",
                        pkgname
                    ))
                    .into());
                }

                if !path.is_file() {
                    return Err(
                        std::io::Error::other(format!("Path is not a file: {}", pkgname)).into(),
                    );
                }

                println!("Extracting archive...");
                Package::extract_archive(pkgname)?;

                let config = Config::parse().unwrap();
                let cache_dir = &config.paths.cache_dir;

                // Find the package directory (should be name-version format)
                let mut pkg_dir_name = None;
                for entry in std::fs::read_dir(cache_dir)? {
                    let entry = entry?;
                    let path = entry.path();
                    if path.is_dir() {
                        let dir_name = path.file_name().unwrap().to_string_lossy();
                        if dir_name.contains('-') && dir_name != "temp_extract" {
                            let install_path = path.join("INSTALL");
                            if install_path.exists() {
                                pkg_dir_name = Some(dir_name.to_string());
                                break;
                            }
                        }
                    }
                }

                let pkg_dir_name = pkg_dir_name
                    .ok_or_else(|| std::io::Error::other("Package directory not found in cache"))?;

                let install_toml_path =
                    Path::new(cache_dir).join(format!("{}/INSTALL", pkg_dir_name));

                if !install_toml_path.exists() {
                    return Err(std::io::Error::other(
                        "INSTALL file not found in package directory",
                    )
                    .into());
                }

                let install_content = std::fs::read_to_string(&install_toml_path)?;
                let install_data: crate::pkgtoolkit::types::Install =
                    toml::from_str(&install_content)?;

                let mut pkg = install_data.package;

                println!("Building package '{}'...", pkg.name);
                pkg.build()?;
                println!("Package '{}' built successfully.", pkg.name);
                return Ok(());
            }
            Commands::Install {
                pkgname,
                source: _,
                path,
                args,
            } => {
                if *path {
                    println!("Installing package from local file: {}", pkgname);

                    println!("Extracting archive...");
                    Package::extract_archive(pkgname)?;

                    let config = Config::parse().unwrap();
                    let cache_dir = &config.paths.cache_dir;

                    let mut pkg_dir_name = None;
                    for entry in std::fs::read_dir(cache_dir)? {
                        let entry = entry?;
                        let path = entry.path();
                        if path.is_dir() {
                            let dir_name = path.file_name().unwrap().to_string_lossy();
                            if dir_name.contains('-') && dir_name != "temp_extract" {
                                let install_path = path.join("INSTALL");
                                if install_path.exists() {
                                    pkg_dir_name = Some(dir_name.to_string());
                                    break;
                                }
                            }
                        }
                    }

                    let pkg_dir_name = pkg_dir_name.ok_or_else(|| {
                        std::io::Error::other("Package directory not found in cache")
                    })?;

                    let install_toml_path =
                        Path::new(cache_dir).join(format!("{}/INSTALL", pkg_dir_name));
                    let install_content = std::fs::read_to_string(&install_toml_path)?;
                    let install_data: crate::pkgtoolkit::types::Install =
                        toml::from_str(&install_content)?;

                    let mut pkg = install_data.package;

                    println!("Building package '{}'...", pkg.name);
                    pkg.build()?;

                    println!("Installing package '{}'...", pkg.name);
                    pkg.install()?;
                    println!("Package '{}' installed successfully.", pkg.name);
                } else {
                    let config = Config::parse().unwrap();
                    if args.http {
                        println!("Installing {} via HTTP", pkgname);
                        let mut http_client = HTTPPackage::new(config);
                        http_client.fetch_index_http().await?;
                        log::info!("Index fetched successfully.");
                        http_client.fetch_package_http(pkgname).await?;
                        log::info!("Package '{}' installed successfully.", pkgname);
                    } else {
                        println!("Installing {} via I2P", pkgname);
                        let mut i2p_client = I2PPackage::new(config);
                        i2p_client.fetch_index().await?;
                        log::info!("Index fetched successfully.");
                        i2p_client.fetch_package(pkgname).await?;
                        log::info!("Package '{}' installed successfully.", pkgname);
                    }
                }
                return Ok(());
            }
            Commands::Uninstall { pkgname } => {
                println!("Uninstalling package: {}", pkgname);

                let installed_packages = Package::list_installed_packages().map_err(|e| {
                    log::error!("Failed to list installed packages: {}", e);
                    e
                })?;

                let package_manifest = installed_packages
                    .iter()
                    .find(|p| p.name == *pkgname)
                    .ok_or_else(|| {
                        std::io::Error::other(format!("Package '{}' is not installed", pkgname))
                    })?;

                let package = Package {
                    name: package_manifest.name.clone(),
                    version: package_manifest.version.clone(),
                    ..Default::default()
                };

                match package.uninstall() {
                    Ok(true) => {
                        println!("Successfully uninstalled package: {}", pkgname);
                        Ok(())
                    }
                    Ok(false) => {
                        log::warn!(
                            "Some files could not be removed during uninstallation of {}",
                            pkgname
                        );
                        Err(std::io::Error::other("Partial uninstallation occurred").into())
                    }
                    Err(e) => {
                        log::error!("Failed to uninstall package {}: {}", pkgname, e);
                        Err(e.into())
                    }
                }
            }
            Commands::GetSource { pkgname } => {
                let config = Config::parse().unwrap();
                println!("Getting source of {}", pkgname);

                let source_path = GitSource::get_source_by_name(pkgname, &config)?;
                println!("Source code successfully downloaded to: {}", source_path);
                return Ok(());
            }
            Commands::DefaultConfig {
                repo,
                cachedir,
                buildir,
                installed_db,
            } => {
                println!("Generating config file");
                if cachedir.is_none() && repo.is_none() && buildir.is_none() {
                    let config = Config::default().unwrap();

                    println!("---- Start of generated config ----");
                    println!("{}", config);
                    println!("---- End of generated config ----");

                    log::warn!("Writing the default config to /etc/mesk/mesk.toml");

                    let path = Path::new("/etc/mesk/mesk.toml");
                    std::fs::create_dir_all(path.parent().unwrap())?;
                    let mut file = std::fs::File::create(path)?;
                    file.write_all(config.as_bytes())?;
                    println!("Config tool ending work.");
                } else {
                    let config = Config::generate(repo, cachedir, buildir, installed_db).unwrap();

                    println!("---- Start of generated config ----");
                    println!("{:?}", config);
                    println!("---- End of generated config ----");

                    log::warn!("Writing the default config to /etc/mesk/mesk.toml");

                    let path = Path::new("/etc/mesk/mesk.toml");
                    std::fs::create_dir_all(path.parent().unwrap())?;
                    let mut file = std::fs::File::create(path)?;
                    file.write_all(config.as_bytes())?;
                    println!("Config tool ending work.");
                }
                return Ok(());
            }
            Commands::Update => {
                let config = Config::parse().unwrap();
                println!("Updating index from {}", config.repo.repo_url);

                let mut i2p_client = I2PPackage::new(config);
                i2p_client.fetch_index().await?;
                println!("Index updated successfully.");
                return Ok(());
            }
            Commands::Upgrade { pkgname } => {
                println!("Upgrading {}", pkgname.as_deref().unwrap_or("all packages"));
                return Ok(());
            }
            Commands::Credits => {
                println!(
                    "CREATED BY: Namilsk as part of the Anthrill independent Global network distribution project"
                );
                println!("          ");
                println!("The Anthrill project repos: https://codeberg.org/NamelessTeam    ");
                return Ok(());
            }
            Commands::GenIndex { path } => {
                println!("Generating index for {}", path);

                Package::gen_index(path)?;
                println!("Index generated successfully.");
                return Ok(());
            }
        }
    };

    // Shutdown router if it was initialized
    if let Some(router) = ROUTER.lock().await.take() {
        // TODO: Add proper router shutdown when implemented
        log::info!("Shutting down integrated router...");
    }

    result
}