//! Container image generation for apt-ostree compose

use std::path::PathBuf;
use std::process::Command;
use apt_ostree::lib::error::{AptOstreeError, AptOstreeResult};
use super::treefile::OutputConfig;

/// Container image generator
pub struct ContainerGenerator {
    workdir: PathBuf,
    ostree_repo: PathBuf,
}

impl ContainerGenerator {
    /// Create a new container generator instance
    pub fn new(workdir: &PathBuf, ostree_repo: &PathBuf) -> Self {
        Self {
            workdir: workdir.clone(),
            ostree_repo: ostree_repo.clone(),
        }
    }
    
    /// Generate a container image from an OSTree commit
    pub async fn generate_image(&self, _ref_name: &str, _output_config: &OutputConfig) -> AptOstreeResult<()> {
        println!("Generating container image...");
        // TODO: Implement actual image generation
        Ok(())
    }
    
    /// Check if skopeo is available
    async fn check_skopeo_available(&self) -> bool {
        // TODO: Implement actual skopeo check
        false
    }
    
    /// Extract OSTree tree to container directory
    async fn extract_ostree_tree(&self, _ref_name: &str, _container_dir: &PathBuf) -> AptOstreeResult<()> {
        println!("Extracting OSTree tree...");
        // TODO: Implement actual tree extraction
        Ok(())
    }
    
    /// Generate container configuration files
    async fn generate_container_config(&self, _container_dir: &PathBuf, _output_config: &OutputConfig) -> AptOstreeResult<()> {
        println!("Generating container config...");
        // TODO: Implement actual config generation
        Ok(())
    }
    
    /// Generate OCI layout structure
    async fn generate_oci_layout(&self, _oci_dir: &PathBuf) -> AptOstreeResult<()> {
        println!("Generating OCI layout...");
        // TODO: Implement actual layout generation
        Ok(())
    }
    
    /// Generate image configuration
    async fn generate_image_config(&self, _oci_dir: &PathBuf, _output_config: &OutputConfig) -> AptOstreeResult<()> {
        println!("Generating image config...");
        // TODO: Implement actual image config generation
        Ok(())
    }
    
    /// Generate OCI manifest
    async fn generate_manifest(&self, _oci_dir: &PathBuf) -> AptOstreeResult<()> {
        println!("Generating OCI manifest...");
        // TODO: Implement actual manifest generation
        Ok(())
    }
    
    /// Create OCI image using skopeo
    async fn create_oci_image(&self, _container_dir: &PathBuf, _ref_name: &str, _output_config: &OutputConfig) -> AptOstreeResult<()> {
        println!("Creating OCI image...");
        // TODO: Implement actual image creation
        Ok(())
    }
    
    /// Calculate SHA256 hash of content
    fn calculate_sha256(&self, _content: &str) -> String {
        // TODO: Implement actual SHA256 calculation
        "placeholder-sha256".to_string()
    }
    
    /// Generate chunked container image
    pub async fn generate_chunked_image(&self, _ref_name: &str, _output_config: &OutputConfig) -> AptOstreeResult<()> {
        println!("Generating chunked image...");
        // TODO: Implement actual chunked image generation
        Ok(())
    }
    
    /// Export container image to different formats
    pub async fn export_image(&self, _input_path: &str, _output_format: &str, _output_path: &str) -> AptOstreeResult<()> {
        println!("Exporting image...");
        // TODO: Implement actual image export
        Ok(())
    }
    
    /// Push container image to registry
    pub async fn push_image(&self, _image_path: &str, _registry_url: &str) -> AptOstreeResult<()> {
        println!("Pushing image...");
        // TODO: Implement actual image push
        Ok(())
    }
    
    /// Validate container image
    pub async fn validate_image(&self, _image_path: &str) -> AptOstreeResult<bool> {
        println!("Validating image...");
        // TODO: Implement actual image validation
        Ok(true)
    }
}
