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#![cfg_attr(coverage_nightly, feature(no_coverage))]

use std::{
    env,
    num::NonZeroUsize,
    path::{Path, PathBuf},
};

fn source_dir() -> PathBuf {
    env::var("DEP_JXL_PATH").map_or_else(
        |_| Path::new(env!("CARGO_MANIFEST_DIR")).join("libjxl"),
        PathBuf::from,
    )
}

#[cfg_attr(coverage_nightly, no_coverage)]
pub fn build() {
    use cmake::Config;

    let source = source_dir();

    env::set_var(
        "CMAKE_BUILD_PARALLEL_LEVEL",
        format!(
            "{}",
            std::thread::available_parallelism()
                .map(NonZeroUsize::get)
                .unwrap_or(1)
        ),
    );

    let mut config = Config::new(source);
    config
        .define("BUILD_SHARED_LIBS", "OFF")
        .define("BUILD_TESTING", "OFF")
        .define("JPEGXL_ENABLE_TOOLS", "OFF")
        .define("JPEGXL_ENABLE_DOXYGEN", "OFF")
        .define("JPEGXL_ENABLE_MANPAGES", "OFF")
        .define("JPEGXL_ENABLE_BENCHMARK", "OFF")
        .define("JPEGXL_ENABLE_EXAMPLES", "OFF")
        .define("JPEGXL_ENABLE_JNI", "OFF")
        .define("JPEGXL_ENABLE_SJPEG", "OFF")
        .define("JPEGXL_ENABLE_OPENEXR", "OFF");

    let mut prefix = config.build();
    println!("cargo:rustc-link-lib=static=jxl");
    println!("cargo:rustc-link-lib=static=jxl_threads");

    println!("cargo:rustc-link-lib=static=hwy");
    prefix.push("lib");
    println!("cargo:rustc-link-search=native={}", prefix.display());
    prefix.pop();

    prefix.push("build");
    prefix.push("third_party");
    println!("cargo:rustc-link-search=native={}", prefix.display());

    println!("cargo:rustc-link-lib=static=brotlicommon-static");
    println!("cargo:rustc-link-lib=static=brotlidec-static");
    println!("cargo:rustc-link-lib=static=brotlienc-static");
    prefix.push("brotli");
    println!("cargo:rustc-link-search=native={}", prefix.display());

    #[cfg(any(target_os = "macos", target_os = "ios", target_os = "freebsd"))]
    println!("cargo:rustc-link-lib=c++");
    #[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "freebsd")))]
    println!("cargo:rustc-link-lib=stdc++");
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_source_dir() {
        let mut path = source_dir();
        assert!(path.is_dir());

        path.push("lib/include/jxl/codestream_header.h");
        assert!(path.exists());
    }
}