const std = @import("std");

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

    // The library module — what downstream consumers import.
    const crucible_mod = b.addModule("crucible", .{
        .root_source_file = b.path("src/crucible.zig"),
        .target = target,
        .optimize = optimize,
    });

    // Static lib artifact (optional install).
    const lib = b.addLibrary(.{
        .name = "crucible",
        .root_module = crucible_mod,
    });
    b.installArtifact(lib);

    // Example executable: stripsolver (needs a tests/ png decoder? no —
    // example is self-contained: it uses crucible only for state dict +
    // layers; arm input comes from CSV).
    const example_mod = b.createModule(.{
        .root_source_file = b.path("examples/stripsolver.zig"),
        .target = target,
        .optimize = optimize,
        .imports = &.{
            .{ .name = "crucible", .module = crucible_mod },
        },
    });
    const example = b.addExecutable(.{
        .name = "stripsolver",
        .root_module = example_mod,
    });
    b.installArtifact(example);

    const run_example = b.addRunArtifact(example);
    run_example.step.dependOn(b.getInstallStep());
    if (b.args) |args| run_example.addArgs(args);
    const run_step = b.step("run", "Run the stripsolver example");
    run_step.dependOn(&run_example.step);

    // Unit tests.
    const tests = b.addTest(.{ .root_module = crucible_mod });
    const run_tests = b.addRunArtifact(tests);
    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&run_tests.step);
}