const std = @import("std");
const vkgen = @import("vulkan-zig");
const glfw_util = @import("glfw");

pub fn build(b: *std.Build) void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    const glfw_dep = b.dependency("glfw", .{});
    glfw_util.install(glfw_dep, b);

    const vk = b.dependency("vulkan-zig", .{
        .registry = @as([]const u8, b.pathFromRoot("reg/vk.xml")),
    });

    const cimgui = b.dependency("cimgui", .{});

    const exe = b.addExecutable(.{
        .name = "zig-glfw-vulkan",
        .root_source_file = b.path("src/main.zig"),
        .target = target,
        .optimize = optimize,
    });
    exe.root_module.addImport("vk", vk.module("vulkan-zig"));
    exe.root_module.addImport("cimgui", cimgui.module("cimgui"));
    glfw_util.link(glfw_dep, exe);
    b.installArtifact(exe);

    const shaders = vkgen.ShaderCompileStep.create(
        b,
        &[_][]const u8{ "glslc", "--target-env=vulkan1.3" },
        "-o",
    );
    shaders.add("triangle_vert", "src/shaders/triangle.vert", .{});
    shaders.add("triangle_frag", "src/shaders/triangle.frag", .{});
    exe.root_module.addImport("shaders", shaders.getModule());

    const run_cmd = b.addRunArtifact(exe);
    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);
}