// SPDX-License-Identifier: LGPL-3.0-only
// SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®

import std;
import Crafter.Build;
namespace fs = std::filesystem;
using namespace Crafter;

// `--version` has to work from any directory, before a project file is
// looked for, and must be answered rather than forwarded to project.cpp as
// one more unknown argument.
namespace {
    std::int32_t Failures = 0;

    void Check(bool cond, std::string_view msg) {
        if (!cond) {
            std::println(std::cerr, "FAIL: {}", msg);
            ++Failures;
        }
    }

    std::int32_t RunWith(std::vector<std::string> args) {
        std::vector<char*> argv;
        for (std::string& arg : args) argv.push_back(arg.data());
        return Run(static_cast<std::int32_t>(argv.size()), argv.data());
    }
}

int main() {
    Check(!CrafterBuildVersion().empty(), "a version string is always baked in");

    // An empty directory: no project.cpp to fall back to.
    const fs::path scratch = fs::temp_directory_path() / "crafter-build-version-flag";
    std::error_code ec;
    fs::remove_all(scratch, ec);
    fs::create_directories(scratch);
    fs::current_path(scratch);

    Check(RunWith({"crafter-build", "--version"}) == 0, "--version exits 0 without a project file");
    Check(RunWith({"crafter-build", "--version", "--some-project-flag"}) == 0, "--version is answered before unknown arguments are forwarded");
    Check(RunWith({"crafter-build", "--some-project-flag", "--version"}) == 0, "--version is answered wherever it appears");

    fs::current_path(fs::temp_directory_path());
    fs::remove_all(scratch, ec);
    return Failures == 0 ? 0 : 1;
}