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;

#[cfg(feature = "integrated-router")]
use crate::router::manager::RouterManager;

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

#[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")]
    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,
}

/// Helper to initialize router manager when integrated-router feature is enabled
#[cfg(feature = "integrated-router")]
async fn init_router_manager(
    config: &Config,
) -> Result<Option<RouterManager>, Box<dyn std::error::Error>> {
    if !config.router.integrated_router {
        return Ok(None);
    }

    println!("Starting integrated router...");
    match RouterManager::new(config).await {
        Ok(manager) => {
            println!("Router manager initialized");
            Ok(Some(manager))
        }
        Err(e) => {
            eprintln!("Failed to initialize router manager: {}", e);
            Err(e)
        }
    }
}

/// Helper to check if router is running (integrated-router feature only)
#[cfg(feature = "integrated-router")]
async fn ensure_router_ready(
    manager: &Option<RouterManager>,
) -> Result<(), Box<dyn std::error::Error>> {
    if let Some(m) = manager {
        if !m.is_running() {
            eprintln!("Router is not running, cannot proceed with I2P operation");
            return Err(std::io::Error::other("Router not running").into());
        }
    }
    Ok(())
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let cli: Cli = Cli::parse();

    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) => {
                    eprintln!("Failed to validate package '{}': {}", path, e);
                    return Err(e.into());
                }
            }
            Ok(())
        }
        Commands::Build { pkgname } => {
            println!("Building package from archive: {}", pkgname);

            let config = Config::parse()?;
            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 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));

            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);
            Ok(())
        }
        Commands::Install {
            pkgname,
            source: _,
            path,
            args,
        } => {
            let config = Config::parse()?;

            #[cfg(feature = "integrated-router")]
            let router_manager = init_router_manager(&config).await?;

            if *path {
                println!("Installing package from local file: {}", pkgname);

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

                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 {
                #[cfg(feature = "integrated-router")]
                {
                    if !args.http && config.router.integrated_router {
                        println!("Waiting for router to be ready...");
                        tokio::time::sleep(std::time::Duration::from_secs(3)).await;
                        ensure_router_ready(&router_manager).await?;
                    }
                }

                if args.http {
                    println!("Installing {} via non-i2p mirror", pkgname);
                    let mut http_client = HTTPPackage::new(config);
                    http_client.fetch_index_http().await?;
                    println!("Index fetched successfully.");
                    http_client.fetch_package_http(pkgname).await?;
                    println!("Package '{}' installed successfully.", pkgname);
                } else {
                    println!("Installing {} via I2P", pkgname);
                    let mut i2p_client = I2PPackage::new(config);
                    i2p_client.fetch_index().await?;
                    println!("Index fetched successfully.");
                    i2p_client.fetch_package(pkgname).await?;
                    println!("Package '{}' installed successfully.", pkgname);
                }
            }
            Ok(())
        }
        Commands::Uninstall { pkgname } => {
            println!("Uninstalling package: {}", pkgname);

            let installed_packages = Package::list_installed_packages().map_err(|e| {
                eprintln!("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) => {
                    eprintln!(
                        "Some files could not be removed during uninstallation of {}",
                        pkgname
                    );
                    Err(std::io::Error::other("Partial uninstallation occurred").into())
                }
                Err(e) => {
                    eprintln!("Failed to uninstall package {}: {}", pkgname, e);
                    Err(e.into())
                }
            }
        }
        Commands::GetSource { pkgname } => {
            let config = Config::parse()?;

            #[cfg(feature = "integrated-router")]
            {
                let router_manager = init_router_manager(&config).await?;
                if config.router.integrated_router {
                    println!("Waiting for router to be ready...");
                    tokio::time::sleep(std::time::Duration::from_secs(2)).await;
                    ensure_router_ready(&router_manager).await?;
                }

                let _source_path = GitSource::get_source_by_name(pkgname, &config)?;
            }

            #[cfg(not(feature = "integrated-router"))]
            {
                let _package = I2PPackage::new(config);
                let _package_fetch = _package.fetch_package(pkgname);
            }

            println!("Getting source of {}", pkgname);
            println!("Source code successfully downloaded to cachedir");
            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()?;

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

                eprintln!("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 ----");

                eprintln!("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.");
            }
            Ok(())
        }
        Commands::Update => {
            let config = Config::parse()?;

            #[cfg(feature = "integrated-router")]
            {
                let router_manager = init_router_manager(&config).await?;
                if config.router.integrated_router {
                    println!("Waiting for router to be ready...");
                    tokio::time::sleep(std::time::Duration::from_secs(2)).await;
                    ensure_router_ready(&router_manager).await?;
                }
            }

            println!("Updating index from {}", config.repo.repo_url);

            let mut i2p_client = I2PPackage::new(config);
            i2p_client.fetch_index().await?;
            println!("Index updated successfully.");
            Ok(())
        }
        Commands::Upgrade { pkgname } => {
            println!("Upgrading {}", pkgname.as_deref().unwrap_or("all packages"));
            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    ");
            Ok(())
        }
        Commands::GenIndex { path } => {
            println!("Generating index for {}", path);

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