const std = @import("std");

pub fn build(b: *std.build.Builder) void {
    // Standard target options allows the person running `zig build` to choose
    // what target to build for. Here we do not override the defaults, which
    // means any target is allowed, and the default is native. Other options
    // for restricting supported target set are available.
    const target = b.standardTargetOptions(.{});

    // Standard release options allow the person running `zig build` to select
    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
    const mode = b.standardReleaseOptions();

    const exe = switch (target.getOs().tag) {
        .linux => b.addExecutable("clipboard", "src/main-linux.zig"),
        .windows => b.addExecutable("clipboard", "src/main-windows.zig"),
        else => std.os.exit(1),
    };

    exe.setTarget(target);
    exe.setBuildMode(mode);
    if (target.getOs().tag == .linux) {
        exe.linkLibC();
        // LibX11 1.7.2: https://gitlab.freedesktop.org/xorg/lib/libx11/-/archive/libX11-1.7.2/libx11-libX11-1.7.2.tar.gz
        // LibXfixes 5.0.3: https://gitlab.freedesktop.org/xorg/lib/libxfixes/-/archive/libXfixes-5.0.3/libxfixes-libXfixes-5.0.3.tar.gz
        // XOrg Proto: https://gitlab.freedesktop.org/xorg/proto/xorgproto/-/archive/xorgproto-2021.5/xorgproto-xorgproto-2021.5.tar.gz
        // We can download the above by taking each url and processing in a
        // command e.g.:
        // curl <url> | tar xz --wildcards '*.h'
        exe.addIncludeDir("libx11-libX11-1.7.2/include");
        exe.addIncludeDir("libxfixes-libXfixes-5.0.3/include");
        exe.addIncludeDir("xorgproto-xorgproto-2021.5/include");

        // More than a little messy. We're grabbing libX11 and libXfixes from
        // the host, while using downloaded headers. This assumes debian
        // bullseye host, and also means you can't cross-compile from Windows.
        // TODO: Make this better
        const dependent_objects = .{
            "/usr/lib/x86_64-linux-gnu/libX11.so.6",
            "/usr/lib/x86_64-linux-gnu/libXfixes.so.3",
        };
        inline for (dependent_objects) |obj|
            exe.addObjectFile(obj);
    }
    if (target.getOs().tag == .windows) {
        // woah...we don't actually need libc!
        exe.linkSystemLibrary("user32");
    }
    exe.install();

    const run_cmd = exe.run();
    run_cmd.step.dependOn(b.getInstallStep());
    if (b.args) |args| {
        run_cmd.addArgs(args);
    }

    const run_step = b.step("run", "Run the app");
    run_step.dependOn(&run_cmd.step);
}