const std = @import("std");
const Build = std.Build;

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

    const options = b.addOptions();

    const known_folders = b.dependency("known_folders", .{}).module("known-folders");

    const meta = b.createModule(.{
        .root_source_file = b.path("src/meta/root.zig"),
        .target = target,
        .optimize = optimize,
    });

    const st = b.addModule("st", .{
        .root_source_file = b.path("src/st/root.zig"),
        .target = target,
        .optimize = optimize,
        .imports = &.{
            .{ .name = "meta", .module = meta },
        },
    });

    const agent = b.addModule("agent", .{
        .root_source_file = b.path("src/agent/root.zig"),
        .target = target,
        .optimize = optimize,
        .imports = &.{
            .{ .name = "known-folders", .module = known_folders },
            // Modules
            .{ .name = "st", .module = st },
            .{ .name = "meta", .module = meta },
        },
    });

    const space = b.createModule(.{
        .root_source_file = b.path("src/main.zig"),
        .target = target,
        .optimize = optimize,
        .imports = &.{
            .{ .name = "known-folders", .module = known_folders },
            // Modules
            .{ .name = "st", .module = st },
            .{ .name = "agent", .module = agent },
            .{ .name = "meta", .module = meta },
        },
    });

    space.addOptions("build-options", options);

    const exe = b.addExecutable(.{
        .root_module = space,
        .name = "space",
    });
    b.installArtifact(exe);

    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 test_step = b.step("test", "Run tests");
    addTest(b, test_step, "meta tests", meta);
    addTest(b, test_step, "st tests", st);
    addTest(b, test_step, "agent tests", agent);
}

fn addTest(b: *Build, step: *Build.Step, name: []const u8, root_module: *Build.Module) void {
    const t = b.addTest(.{
        .name = name,
        .root_module = root_module,
    });
    const run_test = b.addRunArtifact(t);
    step.dependOn(&run_test.step);
}