const std = @import("std");

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

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

    // CLI executable
    const exe_mod = b.createModule(.{
        .root_source_file = b.path("src/main.zig"),
        .target = target,
        .optimize = optimize,
    });
    exe_mod.addImport("panto", panto_lib_dep.module("panto"));

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

    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);

    // CLI unit tests (minimal — most tests live in libpanto)
    const test_mod = b.createModule(.{
        .root_source_file = b.path("src/main.zig"),
        .target = target,
        .optimize = optimize,
    });
    test_mod.addImport("panto", panto_lib_dep.module("panto"));

    const unit_tests = b.addTest(.{
        .name = "panto-tests",
        .root_module = test_mod,
    });

    const run_unit_tests = b.addRunArtifact(unit_tests);
    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&run_unit_tests.step);

    // Also run libpanto's own tests as part of `zig build test`
    const lib_test_step = panto_lib_dep.builder.top_level_steps.get("test").?;
    test_step.dependOn(&lib_test_step.step);
}