use crate::box_trait::{BoolBox, BoxBase, BoxCore, NyashBox, StringBox};
use std::any::Any;

#[derive(Debug, Clone)]
pub struct AotCompilerBox {
    base: BoxBase,
}

impl AotCompilerBox {
    pub fn new() -> Self {
        Self {
            base: BoxBase::new(),
        }
    }
}

impl BoxCore for AotCompilerBox {
    fn box_id(&self) -> u64 {
        self.base.id
    }
    fn parent_type_id(&self) -> Option<std::any::TypeId> {
        self.base.parent_type_id
    }
    fn fmt_box(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "AotCompilerBox")
    }
    fn as_any(&self) -> &dyn Any {
        self
    }
    fn as_any_mut(&mut self) -> &mut dyn Any {
        self
    }
}

impl NyashBox for AotCompilerBox {
    fn to_string_box(&self) -> StringBox {
        StringBox::new("AotCompilerBox".to_string())
    }
    fn equals(&self, other: &dyn NyashBox) -> BoolBox {
        BoolBox::new(other.as_any().is::<AotCompilerBox>())
    }
    fn type_name(&self) -> &'static str {
        "AotCompilerBox"
    }
    fn clone_box(&self) -> Box<dyn NyashBox> {
        Box::new(Self {
            base: self.base.clone(),
        })
    }
    fn share_box(&self) -> Box<dyn NyashBox> {
        self.clone_box()
    }
}

impl AotCompilerBox {
    /// Compile a .nyash file into native EXE by re-invoking current binary with --compile-native.
    /// Returns combined stdout/stderr as String.
    pub fn compile(&self, file: &str, out: &str) -> Box<dyn NyashBox> {
        let mut cmd = match std::env::current_exe() {
            Ok(p) => std::process::Command::new(p),
            Err(e) => return Box::new(StringBox::new(format!("ERR: current_exe(): {}", e))),
        };
        // Propagate relevant envs (AOT/JIT observe)
        let c = cmd
            .arg("--backend")
            .arg("vm") // ensures runner path
            .arg("--compile-native")
            .arg("-o")
            .arg(out)
            .arg(file)
            .envs(std::env::vars());
        match c.output() {
            Ok(o) => {
                let mut s = String::new();
                s.push_str(&String::from_utf8_lossy(&o.stdout));
                s.push_str(&String::from_utf8_lossy(&o.stderr));
                if !o.status.success() {
                    s = format!(
                        "AOT FAILED (code={}):\n{}",
                        o.status.code().unwrap_or(-1),
                        s
                    );
                }
                Box::new(StringBox::new(s))
            }
            Err(e) => Box::new(StringBox::new(format!("ERR: spawn compile-native: {}", e))),
        }
    }
}