const std = @import("std");
const kernel_build = @import("kernel/build.zig");
fn buildImage(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.builtin.OptimizeMode) *std.Build.Step {
    switch (target.result.cpu.arch) {
        .x86_64 => {
            const arch_build = @import("arch/x86/boot/build.zig");
            return arch_build.buildImage(b, optimize);
        },
        else => {
            @panic("target architecture unsupported");
        }
    }

}

pub fn build(b: *std.Build) void {
    const kernel_only_step = b.step("kernel", "Build the kernel only");
    const full_step = b.step("full", "Build the full OS image");
    const qemu_step = b.step("qemu", "Build and run in QEMU");
    const target = b.resolveTargetQuery(.{
        .cpu_arch = .x86_64,
        .os_tag = .freestanding,
        .abi = .none
    });
    const optimize = b.standardOptimizeOption(.{});
    
    const kernel_install = kernel_build.buildKernelBin(b, target, optimize);
    kernel_only_step.dependOn(&kernel_install.step);
    const image_step = buildImage(b, target, optimize);
    b.getInstallStep().dependOn(image_step);
    full_step.dependOn(image_step);

    qemu_step.dependOn(image_step);
    
}