use std::path::PathBuf;
use tokio::fs;
use crate::helpers::FILE_EXTENSION;
use crate::types::MagmaProjectConfig;

pub(crate) struct ProjectInitializer {
    name: String,
    path: PathBuf,
}

impl ProjectInitializer {
    pub fn new(name: Option<String>, path: Option<PathBuf>) -> color_eyre::Result<Self> {
        let project_path = path.unwrap_or(std::env::current_dir()?);
        let project_name = name.unwrap_or(
            project_path.
                file_name()
                .and_then(|n|n.to_str())
                .unwrap_or("magma-project")
                .to_string()
        );
        Ok(Self { name: project_name, path: project_path })
    }
    
    pub async fn init(&self) -> color_eyre::Result<()> {
        if !self.path.exists() {
            fs::create_dir_all(&self.path).await?;
        }
        let magma_file = self.path.join(format!(".{}", FILE_EXTENSION));
        let magma_config = MagmaProjectConfig::default();
        fs::write(&magma_file, toml::to_string(&magma_config)?).await?;
        
        let src_dir = self.path.join("src");
        fs::create_dir_all(&src_dir).await?;
        
        let main_file = src_dir.join(format!("main.{}", FILE_EXTENSION));
        fs::write(&main_file, include_str!("../../assets/main.mg")).await?;
        
        println!("✓ Initialized magma project: {}", self.name);
        println!("\tLocation: {}", self.path.display());
        println!("\tCreated:");
        println!("\t\t- .mg");
        println!("\t\t- src/");
        println!("\t\t- src/main.mg");
        Ok(())
    }
}