const std = @import("std");

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

    const plugin_dynamic_enabled = b.option(bool, "plugin-dynamic", "Enable loading plugin through a dynamic library") orelse true;
    const plugin_static_enabled = b.option(bool, "plugin-static", "Enable loading plugin through a dynamic library") orelse true;

    const build_options = b.addOptions();
    build_options.addOption(bool, "plugin_dynamic", plugin_dynamic_enabled);
    build_options.addOption(bool, "plugin_static", plugin_static_enabled);

    const plugin_api_mod = b.createModule(.{
        .root_source_file = b.path("src/plugin_api.zig"),
    });

    const exe_mod = b.createModule(.{
        .root_source_file = b.path("src/main.zig"),
        .target = target,
        .optimize = optimize
    });
    exe_mod.addOptions("build_options", build_options);
    exe_mod.addImport("plugin_api", plugin_api_mod);

    const plugin_mod = b.createModule(.{
        .root_source_file = b.path("src/plugin.zig"),
        .target = target,
        .optimize = optimize
    });
    plugin_mod.addImport("plugin_api", plugin_api_mod);
    if (plugin_static_enabled) {
        exe_mod.addImport("plugin", plugin_mod);
    }

    const exe = b.addExecutable(.{
        .name = "sokol_template_v2",
        .root_module = exe_mod,
    });

    const plugin_dynamic = b.addLibrary(.{
        .name = "plugin",
        .linkage = .dynamic,
        .root_module = b.createModule(.{
            .root_source_file = b.path("src/plugin_dynamic.zig"),
            .target = target,
            .optimize = optimize
        })
    });
    plugin_dynamic.root_module.addImport("plugin_api", plugin_api_mod);
    plugin_dynamic.root_module.addImport("plugin", plugin_mod);

    const plugin_install_artifact = b.addInstallArtifact(plugin_dynamic, .{ });
    if (plugin_dynamic_enabled) {
        exe.step.dependOn(&plugin_install_artifact.step);
    }

    b.installArtifact(exe);

    {
        const run_cmd = b.addRunArtifact(exe);
        run_cmd.step.dependOn(b.getInstallStep());
        if (plugin_dynamic_enabled) {
            run_cmd.addArg("--plugin-path");
            run_cmd.addArg(b.getInstallPath(.lib, plugin_dynamic.out_lib_filename));
        }
        if (b.args) |args| {
            run_cmd.addArgs(args);
        }

        const run_step = b.step("run", "Run the app");
        run_step.dependOn(&run_cmd.step);
    }

    {
        const run_step = b.step("build-plugin", "Build plugin");
        run_step.dependOn(&plugin_install_artifact.step);
    }

    {
        const exe_tests = b.addTest(.{ .root_module = exe_mod, });
        const run_exe_tests = b.addRunArtifact(exe_tests);

        const test_step = b.step("test", "Run tests");
        test_step.dependOn(&run_exe_tests.step);
    }
}