const std = @import("std");

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

    // The public `zbench` module: what dependents @import.
    const zbench_module = b.addModule("zbench", .{
        .root_source_file = b.path("src/root.zig"),
        .target = target,
        .optimize = optimize,
    });

    // The `zbench_build` module: build-time helpers (add_bench_step).
    // Dependents @import("zbench_build") from their build.zig.
    _ = b.addModule("zbench_build", .{
        .root_source_file = b.path("src/build_helper.zig"),
    });

    // Internal unit tests: `zig build test`.
    const tests = b.addTest(.{
        .root_module = b.createModule(.{
            .root_source_file = b.path("src/root.zig"),
            .target = target,
            .optimize = optimize,
        }),
    });
    const run_tests = b.addRunArtifact(tests);
    const test_step = b.step("test", "Run zbench unit tests");
    test_step.dependOn(&run_tests.step);

    // Convenience: build the bundled example.
    const example_exe = b.addExecutable(.{
        .name = "zbench-example",
        .root_module = b.createModule(.{
            .root_source_file = b.path("examples/bench/main.zig"),
            .target = target,
            .optimize = .ReleaseFast,
        }),
    });
    example_exe.root_module.addImport("zbench", zbench_module);
    b.installArtifact(example_exe);

    const run_example = b.addRunArtifact(example_exe);
    if (b.args) |args| run_example.addArgs(args);
    const example_step = b.step("example", "Run the bundled example benchmarks");
    example_step.dependOn(&run_example.step);
}