import os
from building import *

cwd = GetCurrentDir()

sys.path.append(os.path.join(cwd, '../tools'))
from build_support import (
    detect_rust_target,
    make_rustflags,
    collect_features,
    verify_rust_toolchain,
    ensure_rust_target_installed,
    cargo_build_staticlib,
    clean_rust_build,
)
def _has(sym: str) -> bool:
    try:
        return bool(GetDepend([sym]))
    except Exception:
        return bool(GetDepend(sym))


# Source files – MSH command glue
src = ['rust_cmd.c']
LIBS = []
LIBPATH = []

if GetOption('clean'):
    # Register Rust artifacts for cleaning
    rust_build_dir = clean_rust_build(Dir('#').abspath)
    if os.path.exists(rust_build_dir):
        print(f'Registering {rust_build_dir} for cleanup')
        Clean('.', rust_build_dir)
    else:
        print('No rust build artifacts to clean')
else:
    if verify_rust_toolchain():
        import rtconfig

        target = detect_rust_target(_has, rtconfig)
        if not target:
            print('Error: Unable to detect Rust target; please check configuration')
        else:
            print(f'Detected Rust target: {target}')

            # Optional hint if target missing
            ensure_rust_target_installed(target)

            # Build mode and features
            debug = bool(_has('RUST_DEBUG_BUILD'))
            features = collect_features(_has)

            rustflags = make_rustflags(rtconfig, target)
            rust_lib = cargo_build_staticlib(
                rust_dir=cwd, target=target, features=features, debug=debug, rustflags=rustflags
            )

            if rust_lib:
                LIBS = ['rt_rust']
                LIBPATH = [os.path.dirname(rust_lib)]
                print('Rust library linked successfully')
            else:
                print('Warning: Failed to build Rust library')
    else:
        print('Warning: Rust toolchain not found')
        print('Please install Rust from https://rustup.rs')

# Define component group for SCons
group = DefineGroup('rust', src, depend=['RT_USING_RUST'], LIBS=LIBS, LIBPATH=LIBPATH)

Return('group')