const std = @import("std");

// Although this function looks imperative, note that its job is to
// declaratively construct a build graph that will be executed by an external
// runner.
pub fn build(b: *std.Build) void {
    // Standard target options allows the person running `zig build` to choose
    // what target to build for. Here we do not override the defaults, which
    // means any target is allowed, and the default is native. Other options
    // for restricting supported target set are available.
    const target = b.standardTargetOptions(.{});

    // Standard optimization options allow the person running `zig build` to select
    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
    // set a preferred release mode, allowing the user to decide how to optimize.
    const optimize = b.standardOptimizeOption(.{});

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

    const exe = b.addExecutable(.{
        .name = "seizer-solitaire",
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });
    exe.root_module.addImport("seizer", seizer.module("seizer"));
    b.installArtifact(exe);

    // additionally generate an HTML file with the wasm module embedded when we use the wasi target
    if (target.result.os.tag == .wasi) {
        exe.wasi_exec_model = .reactor;

        const bundle_webpage_exe = seizer.artifact("bundle-webpage");

        const bundle_webpage = b.addRunArtifact(bundle_webpage_exe);
        bundle_webpage.addArtifactArg(exe);

        const install_html = b.addInstallFile(bundle_webpage.captureStdOut(), "www/seizer-solitaire.html");
        b.getInstallStep().dependOn(&install_html.step);
    }

    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 exe_unit_tests = b.addTest(.{
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });
    exe_unit_tests.root_module.addImport("seizer", seizer.module("seizer"));

    const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);

    // Similar to creating the run step earlier, this exposes a `test` step to
    // the `zig build --help` menu, providing a way for the user to request
    // running the unit tests.
    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&run_exe_unit_tests.step);
}