use crate::veprintln;
use anyhow::{anyhow, Result};
use std::path::Path;

/// Check if binfmt_misc is registered for the target architecture
pub fn check_binfmt(arch: &str) -> Result<()> {
    let qemu_arch = map_arch_to_qemu(arch);

    let binfmt_path = format!("/proc/sys/fs/binfmt_misc/qemu-{}", qemu_arch);

    if !Path::new(&binfmt_path).exists() {
        return Err(anyhow!(
            "binfmt_misc not registered for {}\n\n\
            Install QEMU user emulation:\n\
              Ubuntu/Debian: sudo apt install qemu-user-static\n\
              Arch: sudo pacman -S qemu-user-static-binfmt\n\
              Alpine: sudo apk add qemu-user-static",
            arch
        ));
    }

    veprintln!("QEMU binfmt_misc registered for {}", arch);
    Ok(())
}

/// Map ecr architecture names to QEMU binary names
fn map_arch_to_qemu(arch: &str) -> &str {
    match arch {
        "amd64" | "x86_64" => "x86_64",
        "arm64" | "aarch64" => "aarch64",
        "armhf" | "armv7" => "arm",
        "riscv64" => "riscv64",
        "ppc64el" | "ppc64le" => "ppc64le",
        "s390x" => "s390x",
        _ => arch,
    }
}