//! Rhai wrappers for Buildah module functions
//!
//! This module provides Rhai wrappers for the functions in the Buildah module.

use crate::buildah::{BuildahError, Builder, ContentOperations, Image};
use rhai::{Array, Dynamic, Engine, EvalAltResult};
use sal_process::CommandResult;

/// Register Buildah module functions with the Rhai engine
///
/// # Arguments
///
/// * `engine` - The Rhai engine to register the functions with
///
/// # Returns
///
/// * `Result<(), Box<EvalAltResult>>` - Ok if registration was successful, Err otherwise
pub fn register_bah_module(engine: &mut Engine) -> Result<(), Box<EvalAltResult>> {
    // Register types
    register_bah_types(engine)?;

    // Register Builder constructor
    engine.register_fn("bah_new", bah_new);

    // Register Builder instance methods
    engine.register_fn("run", builder_run);
    engine.register_fn("run_with_isolation", builder_run_with_isolation);
    engine.register_fn("copy", builder_copy);
    engine.register_fn("add", builder_add);
    engine.register_fn("commit", builder_commit);
    engine.register_fn("remove", builder_remove);
    engine.register_fn("reset", builder_reset);
    engine.register_fn("config", builder_config);
    // Register Builder instance methods for entrypoint, cmd, and content operations
    engine.register_fn("set_entrypoint", builder_set_entrypoint);
    engine.register_fn("set_cmd", builder_set_cmd);
    engine.register_fn("write_content", builder_write_content);
    engine.register_fn("read_content", builder_read_content);

    // Register Builder static methods
    engine.register_fn("images", builder_images);
    engine.register_fn("image_remove", builder_image_remove);
    engine.register_fn("image_pull", builder_image_pull);
    engine.register_fn("image_push", builder_image_push);
    engine.register_fn("image_tag", builder_image_tag);
    engine.register_fn("build", builder_build);

    Ok(())
}

/// Register Buildah module types with the Rhai engine
fn register_bah_types(engine: &mut Engine) -> Result<(), Box<EvalAltResult>> {
    // Register Builder type
    engine.register_type_with_name::<Builder>("BuildahBuilder");

    // Register getters for Builder properties
    engine.register_get("container_id", get_builder_container_id);
    engine.register_get("name", get_builder_name);
    engine.register_get("image", get_builder_image);
    engine.register_get("debug_mode", get_builder_debug);
    engine.register_set("debug_mode", set_builder_debug);

    // Register Image type and methods (same as before)
    engine.register_type_with_name::<Image>("BuildahImage");

    // Register getters for Image properties
    engine.register_get("id", |img: &mut Image| img.id.clone());
    engine.register_get("names", |img: &mut Image| {
        let mut array = Array::new();
        for name in &img.names {
            array.push(Dynamic::from(name.clone()));
        }
        array
    });
    // Add a 'name' getter that returns the first name or a default
    engine.register_get("name", |img: &mut Image| {
        if img.names.is_empty() {
            "<none>".to_string()
        } else {
            img.names[0].clone()
        }
    });
    engine.register_get("size", |img: &mut Image| img.size.clone());
    engine.register_get("created", |img: &mut Image| img.created.clone());

    Ok(())
}

// Helper functions for error conversion
impl From<BuildahError> for Box<EvalAltResult> {
    fn from(err: BuildahError) -> Self {
        Box::new(EvalAltResult::ErrorRuntime(
            format!("Buildah error: {}", err).into(),
            rhai::Position::NONE,
        ))
    }
}

// Helper function to convert Rhai Array of pairs to a Vec of tuples
fn convert_array_to_vec(
    options: Array,
) -> Result<Vec<(String, String)>, Box<EvalAltResult>> {
    let mut config_options: Vec<(String, String)> = Vec::new();

    for option_pair_dynamic in options {
        let pair = option_pair_dynamic.into_array().map_err(|_e| {
            Box::new(EvalAltResult::ErrorRuntime(
                "Each option must be an array of [key, value]".into(),
                rhai::Position::NONE,
            ))
        })?;

        if pair.len() != 2 {
            return Err(Box::new(EvalAltResult::ErrorRuntime(
                "Each option must be an array of [key, value] with 2 elements".into(),
                rhai::Position::NONE,
            )));
        }

        let key = pair[0].clone().into_string().map_err(|_e| {
            Box::new(EvalAltResult::ErrorRuntime(
                "Option key must be a string".into(),
                rhai::Position::NONE,
            ))
        })?;

        let value = pair[1].clone().into_string().map_err(|_e| {
            Box::new(EvalAltResult::ErrorRuntime(
                "Option value must be a string".into(),
                rhai::Position::NONE,
            ))
        })?;

        config_options.push((key, value));
    }

    Ok(config_options)
}

/// Create a new Builder
pub fn bah_new(name: &str, image: &str) -> Result<Builder, Box<EvalAltResult>> {
    Builder::new(name, image).map_err(Into::into)
}

// Builder instance methods
pub fn builder_run(
    builder: &mut Builder,
    command: &str,
) -> Result<CommandResult, Box<EvalAltResult>> {
    builder.run(command).map_err(Into::into)
}

pub fn builder_run_with_isolation(
    builder: &mut Builder,
    command: &str,
    isolation: &str,
) -> Result<CommandResult, Box<EvalAltResult>> {
    builder
        .run_with_isolation(command, isolation)
        .map_err(Into::into)
}

pub fn builder_copy(
    builder: &mut Builder,
    source: &str,
    dest: &str,
) -> Result<CommandResult, Box<EvalAltResult>> {
    builder.copy(source, dest).map_err(Into::into)
}

pub fn builder_add(
    builder: &mut Builder,
    source: &str,
    dest: &str,
) -> Result<CommandResult, Box<EvalAltResult>> {
    builder.add(source, dest).map_err(Into::into)
}

pub fn builder_commit(
    builder: &mut Builder,
    image_name: &str,
    options: Array,
) -> Result<CommandResult, Box<EvalAltResult>> {
    let commit_options = convert_array_to_vec(options)?;
    builder
        .commit(image_name, Some(commit_options))
        .map_err(Into::into)
}

pub fn builder_remove(builder: &mut Builder) -> Result<CommandResult, Box<EvalAltResult>> {
    builder.remove().map_err(Into::into)
}

pub fn builder_config(
    builder: &mut Builder,
    options: Array,
) -> Result<CommandResult, Box<EvalAltResult>> {
    let config_options = convert_array_to_vec(options)?;
    builder.config(config_options).map_err(Into::into)
}

/// Set the entrypoint for the container
pub fn builder_set_entrypoint(
    builder: &mut Builder,
    entrypoint: Array,
) -> Result<CommandResult, Box<EvalAltResult>> {
    let entrypoint_vec: Vec<String> = entrypoint
        .into_iter()
        .map(|item| item.into_string().unwrap_or_default())
        .collect();
    builder.set_entrypoint(entrypoint_vec).map_err(Into::into)
}

/// Set the default command for the container
pub fn builder_set_cmd(
    builder: &mut Builder,
    cmd: Array,
) -> Result<CommandResult, Box<EvalAltResult>> {
    let cmd_vec: Vec<String> = cmd
        .into_iter()
        .map(|item| item.into_string().unwrap_or_default())
        .collect();
    builder.set_cmd(cmd_vec).map_err(Into::into)
}

/// Write content to a file in the container
pub fn builder_write_content(
    builder: &mut Builder,
    content: &str,
    dest_path: &str,
) -> Result<CommandResult, Box<EvalAltResult>> {
    if let Some(container_id) = builder.container_id() {
        ContentOperations::write_content(container_id, content, dest_path).map_err(Into::into)
    } else {
        Err(Box::new(EvalAltResult::ErrorRuntime(
            "No container ID available".into(),
            rhai::Position::NONE,
        )))
    }
}

/// Read content from a file in the container
pub fn builder_read_content(
    builder: &mut Builder,
    source_path: &str,
) -> Result<String, Box<EvalAltResult>> {
    if let Some(container_id) = builder.container_id() {
        ContentOperations::read_content(container_id, source_path).map_err(Into::into)
    } else {
        Err(Box::new(EvalAltResult::ErrorRuntime(
            "No container ID available".into(),
            rhai::Position::NONE,
        )))
    }
}

// Builder static methods
pub fn builder_images(_builder: &mut Builder) -> Result<Array, Box<EvalAltResult>> {
    let images = Builder::images()?;

    // Convert Vec<Image> to Rhai Array
    let mut array = Array::new();
    for image in images {
        array.push(Dynamic::from(image));
    }

    Ok(array)
}

pub fn builder_image_remove(
    _builder: &mut Builder,
    image: &str,
) -> Result<CommandResult, Box<EvalAltResult>> {
    Builder::image_remove(image).map_err(Into::into)
}

pub fn builder_image_pull(
    _builder: &mut Builder,
    image: &str,
    tls_verify: bool,
) -> Result<CommandResult, Box<EvalAltResult>> {
    Builder::image_pull(image, tls_verify).map_err(Into::into)
}

pub fn builder_image_push(
    _builder: &mut Builder,
    image: &str,
    destination: &str,
    tls_verify: bool,
) -> Result<CommandResult, Box<EvalAltResult>> {
    Builder::image_push(image, destination, tls_verify).map_err(Into::into)
}

pub fn builder_image_tag(
    _builder: &mut Builder,
    image: &str,
    new_name: &str,
) -> Result<CommandResult, Box<EvalAltResult>> {
    Builder::image_tag(image, new_name).map_err(Into::into)
}

// Getter functions for Builder properties
pub fn get_builder_container_id(builder: &mut Builder) -> String {
    match builder.container_id() {
        Some(id) => id.clone(),
        None => "".to_string(),
    }
}

pub fn get_builder_name(builder: &mut Builder) -> String {
    builder.name().to_string()
}

pub fn get_builder_image(builder: &mut Builder) -> String {
    builder.image().to_string()
}

/// Get the debug flag from a Builder
pub fn get_builder_debug(builder: &mut Builder) -> bool {
    builder.debug()
}

/// Set the debug flag on a Builder
pub fn set_builder_debug(builder: &mut Builder, debug: bool) {
    builder.set_debug(debug);
}

// Reset function for Builder
pub fn builder_reset(builder: &mut Builder) -> Result<(), Box<EvalAltResult>> {
    builder.reset().map_err(Into::into)
}

// Build function for Builder
pub fn builder_build(
    _builder: &mut Builder,
    tag: &str,
    context_dir: &str,
    file: &str,
    isolation: &str,
) -> Result<CommandResult, Box<EvalAltResult>> {
    Builder::build(Some(tag), context_dir, file, Some(isolation)).map_err(Into::into)
}