extern crate pkg_config;

use std::env;
use std::fs::{self, File};
use std::path::PathBuf;
use std::process::Command;

fn main() {
    match pkg_config::find_library("libsodium") {
        Ok(_)  => {},
        Err(_) => {
            let src = PathBuf::from(&env::var_os("CARGO_MANIFEST_DIR").unwrap())
                .join("libsodium");
            let dst = PathBuf::from(&env::var_os("OUT_DIR").unwrap()).join("build");
            let _ = fs::create_dir(&dst);

            match File::open(src.join("configure")) {
                Ok(_)  => {},
                Err(_) => {
                    run(Command::new("./autogen.sh").current_dir(&src));
                },
            }
            run(Command::new("./configure").current_dir(&src));
            run(Command::new("make").current_dir(&src));
            let shlib = src.join("src/libsodium/.libs");
            let _ = fs::copy(&shlib.join("libsodium.a"),
                             &dst.join("libsodium.a"));

            println!("cargo:rustc-flags=-l static=sodium");
            println!("cargo:rustc-flags=-L {}", dst.display());

            //if let Ok(lib_dir) = env::var("SODIUM_LIB_DIR") {
            //    println!("cargo:rustc-flags=-L native={}", lib_dir);
            //}

            //let mode = match env::var_os("SODIUM_STATIC") {
            //    Some(_) => "static",
            //    None => "dylib"
            //};

            //println!("cargo:rustc-flags=-l {0}=sodium", mode);
            //      },
            // }
        },
    }
}

fn run(cmd: &mut Command) {
    match cmd.status() {
        Ok(status) => assert!(status.success()),
        Err(e)     => panic!("Unable to execute {:?}! {}", cmd, e),
    }
}