use crate::cfg::config::Config;
use crate::pkgtoolkit::types::Package;
use git2::Repository;
use std::fs;
use std::path::Path;
use toml;

pub struct GitSource;

impl GitSource {
    /// Clone a git repository to a local directory
    pub fn clone_repo(git_url: &str, target_dir: &Path) -> Result<(), git2::Error> {
        Repository::clone(git_url, target_dir)?;
        Ok(())
    }

    /// Get source code for a package from its git repository
    pub fn get_package_source(
        package: &Package,
        config: &Config,
    ) -> Result<String, Box<dyn std::error::Error>> {
        let git_repo = package
            .git_repo
            .as_ref()
            .ok_or("Package does not have a git repository specified")?;

        let source_dir = Path::new(&config.paths.cache_dir)
            .join("sources")
            .join(&package.name)
            .join(&package.version);

        fs::create_dir_all(&source_dir)?;

        println!("Cloning {} from {}", package.name, git_repo);
        Self::clone_repo(git_repo, &source_dir)?;

        let source_path = source_dir.to_string_lossy().to_string();
        println!("Source code downloaded to: {}", source_path);

        Ok(source_path)
    }

    /// Get source code for a package by name, first checking INSTALL file, then falling back to index
    pub fn get_source_by_name(
        pkg_name: &str,
        config: &Config,
    ) -> Result<String, Box<dyn std::error::Error>> {
        let install_path = Path::new(&config.paths.cache_dir).join(format!("{}/INSTALL", pkg_name));

        if install_path.exists() {
            let install_content = fs::read_to_string(&install_path)?;
            let install_data: crate::pkgtoolkit::types::Install = toml::from_str(&install_content)
                .map_err(|e| format!("Failed to parse INSTALL file: {}", e))?;

            // Check if InstallMeta has git_repo
            if let Some(git_repo) = install_data.install.git_repo {
                println!("Found git repository in INSTALL file: {}", git_repo);

                let source_dir = Path::new(&config.paths.cache_dir)
                    .join("sources")
                    .join(&install_data.package.name)
                    .join(&install_data.package.version);

                fs::create_dir_all(&source_dir)?;

                println!("Cloning {} from {}", install_data.package.name, git_repo);
                Self::clone_repo(&git_repo, &source_dir)?;

                let source_path = source_dir.to_string_lossy().to_string();
                println!("Source code downloaded to: {}", source_path);

                return Ok(source_path);
            }
        }

        let index_path = Path::new(&config.paths.cache_dir).join("INDEX.toml");

        if !index_path.exists() {
            return Err("Index file not found. Please run 'mesk update' first.".into());
        }

        let index_content = fs::read_to_string(&index_path)?;
        let index: crate::pkgtoolkit::types::Index =
            toml::from_str(&index_content).map_err(|e| format!("Failed to parse index: {}", e))?;

        let package = index
            .packages
            .iter()
            .find(|pkg| pkg.name == pkg_name)
            .ok_or(format!("Package '{}' not found in index", pkg_name))?;

        Self::get_package_source(package, config)
    }
}