use std::env;
use std::path::PathBuf;

fn main() {
    let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());

    cc::Build::new()
        .cpp(true)
        .include("vendor/Clipper2/CPP/Clipper2Lib/include")
        .include("vendor/Clipper2/CPP/Utils")
        .files([
            "vendor/Clipper2/CPP/Clipper2Lib/src/clipper.engine.cpp",
            "vendor/Clipper2/CPP/Clipper2Lib/src/clipper.offset.cpp",
            "vendor/Clipper2/CPP/Clipper2Lib/src/clipper.rectclip.cpp",
            "vendor/Clipper2/CPP/Utils/clipper.svg.cpp",
        ])
        .flag_if_supported("-std:c++17") // MSVC
        .flag_if_supported("-std=c++17")
        .compile("clipper2");

    println!("cargo:rustc-link-lib=clipper2");

    let mut assimp_config = std::fs::read_to_string("vendor/assimp/include/assimp/config.h.in")
        .expect("assimp config.h.in not found!");
    let replace_cmakedefine = regex::Regex::new(r"(?m)^#cmakedefine").unwrap();
    assimp_config = replace_cmakedefine
        .replace_all(&*assimp_config, "// #cmakedefine")
        .to_string();

    let assimp_include_folder = out_dir.join("assimp_include");
    let assimp_include_assimp_folder = assimp_include_folder.join("assimp");
    // Create {OUT_DIR}/assimp_include/assimp
    std::fs::create_dir_all(&assimp_include_assimp_folder)
        .expect("unable to create assimp config directory!");
    // Put file in {OUT_DIR}/assimp_include/assimp/config.h
    std::fs::write(assimp_include_assimp_folder.join("config.h"), assimp_config)
        .expect("could not write assimp config.h!");

    cc::Build::new()
        .cpp(true)
        .include("vendor/manifold/include")
        .include("vendor/Clipper2/CPP/Clipper2Lib/include")
        .include("vendor/glm")
        .include("vendor/assimp/include")
        .include("vendor/manifold/bindings/c/include")
        .include(assimp_include_folder)
        .files([
            "vendor/manifold/src/boolean3.cpp",
            "vendor/manifold/src/boolean_result.cpp",
            "vendor/manifold/src/constructors.cpp",
            "vendor/manifold/src/csg_tree.cpp",
            "vendor/manifold/src/edge_op.cpp",
            "vendor/manifold/src/face_op.cpp",
            "vendor/manifold/src/impl.cpp",
            "vendor/manifold/src/manifold.cpp",
            "vendor/manifold/src/polygon.cpp",
            "vendor/manifold/src/properties.cpp",
            "vendor/manifold/src/quickhull.cpp",
            "vendor/manifold/src/sdf.cpp",
            "vendor/manifold/src/smoothing.cpp",
            "vendor/manifold/src/sort.cpp",
            "vendor/manifold/src/subdivision.cpp",
            "vendor/manifold/src/cross_section/cross_section.cpp",
            "vendor/manifold/src/meshIO/meshIO.cpp",
            "vendor/manifold/bindings/c/manifoldc.cpp",
            "vendor/manifold/bindings/c/conv.cpp",
            "vendor/manifold/bindings/c/box.cpp",
            "vendor/manifold/bindings/c/cross.cpp",
            "vendor/manifold/bindings/c/rect.cpp",
        ])
        .flag_if_supported("-std:c++17") // MSVC
        .flag_if_supported("-std=c++17")
        .flag_if_supported("-Wno-unused-parameter")
        .flag_if_supported("-Wno-extra")
        .flag_if_supported("-Wno-unused-variable")
        .flag_if_supported("-Wno-unused-but-set-variable")
        .define("MANIFOLD_EXPORT", "ON")
        .compile("manifold");

    println!("cargo:rustc-link-lib=manifold");

    let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap();
    let target_env = env::var("CARGO_CFG_TARGET_ENV").unwrap();

    match (target_os.as_str(), target_env.as_str()) {
        ("linux", _) | ("windows", "gnu") | ("android", _) => {
            println!("cargo:rustc-link-lib=dylib=stdc++")
        }
        ("macos", _) | ("ios", _) => println!("cargo:rustc-link-lib=dylib=c++"),
        ("windows", "msvc") => {}
        _ => unimplemented!(
            "target_os: {}, target_env: {}",
            target_os.as_str(),
            target_env.as_str()
        ),
    }

    let bindings = bindgen::Builder::default()
        .header("vendor/manifold/bindings/c/include/manifold/manifoldc.h")
        .clang_arg("-Ivendor/manifold/bindings/c/include")
        .clang_arg("-DMANIFOLD_EXPORT")
        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
        .merge_extern_blocks(true)
        .generate()
        .expect("Unable to generate bindings");

    bindings
        .write_to_file(out_dir.join("bindings.rs"))
        .expect("Couldn't write bindings!");
}