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// mcpp.cli.cmd_new — CLI parsing + routing for `mcpp new`.

// Implementation lives in mcpp.scaffold.create.

module;

#include <cstdio>

#include <cstdlib>

export module mcpp.cli.cmd_new;

import std;

import mcpplibs.cmdline;

import mcpp.scaffold;

import mcpp.scaffold.create;

import mcpp.scaffold.project_name;

import mcpp.ui;

namespace mcpp::cli {

export int cmd_new(const mcpplibs::cmdline::ParsedArgs& parsed) {

// Discovery mode: `mcpp new --list-templates <pkg>[@ver]` — no project.

if (auto lt = parsed.value("list-templates")) {

auto spec = mcpp::scaffold::parse_template_spec(*lt);

if (!spec) {

mcpp::ui::error(spec.error().message);

return 2;

}

if (spec->templateName) {

mcpp::ui::error(

"--list-templates expects only [ns.]name[@version], without :tname");

return 2;

}

if (spec->legacyList) {

mcpp::ui::warning(std::format(

"trailing ':' list syntax is deprecated; use "

"`mcpp new --list-templates {}`",

lt->substr(0, lt->size() - 1)));

}

return mcpp::scaffold::list_package_templates(*spec);

}

std::string name = parsed.positional(0);

if (name.empty()) {

std::println(stderr, "error: `mcpp new` requires a package name (e.g. `mcpp new hello`)");

return 2;

}

// Validate before parsing configuration, consulting an index, starting a

// download, or creating even a staging directory. A project name is both

// a package identity and one portable directory component.

auto project = mcpp::scaffold::validate_project_name(name);

if (!project) {

mcpp::ui::error(project.error().message);

return 2;

}

// `--template` exact package SPEC:

// builtin registry (frozen: bin; gui = transitional alias), else a

// package template: [ns.]pkg | [ns.]pkg:tmpl | [ns.]pkg@ver:tmpl.

std::string tmpl = "bin";

if (auto t = parsed.value("template")) tmpl = *t;

if (tmpl == "gui") {

mcpp::ui::warning(

"--template gui is deprecated; use `--template imgui` "

"(the template then ships with — and version-tracks — the library)");

}

if (tmpl != "bin" && tmpl != "gui") {

auto spec = mcpp::scaffold::parse_template_spec(tmpl);

if (!spec) {

mcpp::ui::error(spec.error().message);

return 2;

}

if (spec->legacyList) {

mcpp::ui::warning(std::format(

"trailing ':' list syntax is deprecated; use "

"`mcpp new --list-templates {}`",

tmpl.substr(0, tmpl.size() - 1)));

return mcpp::scaffold::list_package_templates(*spec);

}

return mcpp::scaffold::new_from_package_template(*project, *spec);

}

return mcpp::scaffold::create_builtin_project(

*project, /*gui=*/tmpl == "gui");

}

} // namespace mcpp::cli

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