const std = @import("std");

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

    const vulkan = b.dependency("vulkan_zig", .{
        .registry = b.dependency("vulkan_headers", .{}).path("registry/vk.xml"),
        .target = target,
        .optimize = optimize,
    }).module("vulkan-zig");

    const glfw = b.dependency("glfw", .{
        .target = target,
        .optimize = optimize,
    }).artifact("glfw");

    const lib_mod = b.createModule(.{
        .root_source_file = b.path("src/root.zig"),
        .target = target,
        .optimize = optimize,
    });
    lib_mod.addImport("vk", vulkan);

    const exe_mod = b.createModule(.{
        .root_source_file = b.path("src/main.zig"),
        .target = target,
        .optimize = optimize,
    });
    exe_mod.addImport("vk", vulkan);
    exe_mod.addImport("zig-shape-lib", lib_mod);
    exe_mod.linkLibrary(glfw);

    const lib = b.addStaticLibrary(.{
        .name = "zig-shape",
        .root_module = lib_mod,
    });

    b.installArtifact(lib);

    const exe = b.addExecutable(.{
        .name = "zig-shape",
        .root_module = exe_mod,
    });

    b.installArtifact(exe);

    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);

    const lib_unit_tests = b.addTest(.{
        .root_module = lib_mod,
        .name = "lib-unit-tests",
    });

    const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);

    const exe_unit_tests = b.addTest(.{
        .root_module = exe_mod,
        .name = "exe-unit-tests",
    });

    const build_test_step = b.step("build-test", "Build unit tests");

    const install_lib_test = b.addInstallArtifact(lib_unit_tests, .{ .dest_dir = .{ .override = .{ .custom = "dev" } } });
    build_test_step.dependOn(&install_lib_test.step);

    const install_exe_test = b.addInstallArtifact(exe_unit_tests, .{ .dest_dir = .{ .override = .{ .custom = "dev" } } });
    build_test_step.dependOn(&install_exe_test.step);

    const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);

    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&run_lib_unit_tests.step);
    test_step.dependOn(&run_exe_unit_tests.step);
}