const std = @import("std");
const Builder = std.build.Builder;
const Pkg = std.build.Pkg;

pub fn build(b: *Builder) void {
    const mode = b.standardReleaseOptions();
    const target = b.standardTargetOptions(<%=Zig.Target.for_builder()%>);

    const erl_nif_pkg = Pkg{
        .name = "erl_nif",
        .source = .{ .path = "<%= Path.join(@beam_dir, "erl_nif.zig") %>"}
    };

    const no_sema_pkg = Pkg{
        .name = "sema",
        .source = .{ .path = "<%= Path.join(@beam_dir, "sema/off.zig") %>"}
    };

    const beam_pkg = Pkg{
        .name = "beam",
        .source = .{ .path = "<%= Path.join(@beam_dir, "beam.zig") %>"},
        .dependencies = &.{erl_nif_pkg, no_sema_pkg},
    };

    <%= for {name, path, deps} <- @packages do %>
    const <%= name %>_pkg = Pkg {
        .name = "<%= name %>",
        .source = .{ .path = "<%= path %>"},
        .dependencies = &.{<%= deps %>},
    };
    <% end %>

    <% package_list = Enum.map(@packages, fn {name, _, _} -> ", #{name}_pkg" end) %>
    const core_pkg = Pkg{
        .name = "nif",
        .source = .{ .path = "<%= @nif_path %>" },
        .dependencies = &.{beam_pkg, erl_nif_pkg<%= package_list %>},
    };

    const beam_system_dir = "<%= :code.root_dir() %>/erts-<%= :erlang.system_info(:version) %>/include";

    const lib = b.addSharedLibrary(
        "<%= @module %>",
        "module.zig",
        .{ .versioned = .{.major = <%= @version.major %>,
                          .minor = <%= @version.minor %>,
                          .patch = <%= @version.patch %>}});
    lib.linkage = .dynamic;

    lib.addSystemIncludePath(beam_system_dir);
    lib.linkLibC();
    lib.addPackage(erl_nif_pkg);
    lib.addPackage(beam_pkg);
    lib.addPackage(core_pkg);
    <%= for {name, _, _} <- @packages do %>
    lib.addPackage(<%= name %>_pkg);
    <% end %>

    <%= for lib <- @link_lib do %>
      <%= case lib do %>
        <% {:system, lib} -> %>
    lib.linkSystemLibrary("<%= lib %>");
        <% lib -> %>
    lib.addObjectFile("<%= lib %>");
      <% end %>
    <% end %>

    <%= for include <- @include_dir do %>
    lib.addIncludePath("<%= include %>");
    <% end %>

    <%= for {c_src, c_src_opts} <- @c_src do %>
    <% ccompileparams = Enum.map_join(c_src_opts, ", ", &~s("#{&1}")) %>
    lib.addCSourceFile("<%= c_src %>",  &[_][]const u8{<%= ccompileparams %>});
    <% end %>

    lib.setBuildMode(mode);
    lib.setTarget(target);

    lib.linker_allow_shlib_undefined = true;

    <%= if @stage1 do %> lib.use_stage1 = true; <% end %>

    lib.install();
}