const std = @import("std");

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

    // TODO: This should be a non-exhaustive enum with one option: all
    const day = b.option(u8, "day", "Build day") orelse 1;

    // TODO: Depending on the day chosen, only that day should compile, or all days
    const exe = addDay(b, target, optimize, day);
    b.installArtifact(exe);

    // run step
    const run_exe = b.addRunArtifact(exe);
    const run_step = b.step("run", "Run the binary");
    run_step.dependOn(&run_exe.step);
}

fn addDay(
    b: *std.Build,
    target: std.Build.ResolvedTarget,
    optimize: std.builtin.OptimizeMode,
    day: u8,
) *std.Build.Step.Compile {
    return b.addExecutable(.{
        .name = "aoc2025",
        .root_module = b.createModule(.{
            .root_source_file = b.path(b.fmt("src/day_{d}.zig", .{day})),
            .target = target,
            .optimize = optimize,
        }),
    });
}