// v2.3 — project-addressing parser tests.
//
// Locks in the edge-case semantics. Anything that relies on the parser
// (gRPC handlers, mirror routing, client) builds on these guarantees.

#include <cstdlib>
#include <iostream>
#include <stdexcept>

#include "project_addressing.hpp"

using smartbotic::database::kDefaultProject;
using smartbotic::database::ProjectCollection;
using smartbotic::database::isValidProjectName;
using smartbotic::database::parseProjectCollection;

namespace {

int g_pass = 0;
int g_fail = 0;

void check(bool cond, const char* msg) {
    if (cond) ++g_pass;
    else { ++g_fail; std::cerr << "FAIL: " << msg << "\n"; }
}

template <typename Fn>
void check_throws(Fn fn, const char* msg) {
    try {
        fn();
        ++g_fail;
        std::cerr << "FAIL (did not throw): " << msg << "\n";
    } catch (const std::invalid_argument&) {
        ++g_pass;
    } catch (...) {
        ++g_fail;
        std::cerr << "FAIL (wrong exception type): " << msg << "\n";
    }
}

void test_unqualified_resolves_to_default() {
    auto r = parseProjectCollection("users");
    check(r.project == kDefaultProject, "unqualified: project == default");
    check(r.collection == "users", "unqualified: collection preserved");
}

void test_qualified_splits_on_separator() {
    auto r = parseProjectCollection("my_app:users");
    check(r.project == "my_app", "qualified: project parsed");
    check(r.collection == "users", "qualified: collection parsed");
}

void test_long_collection_name() {
    auto r = parseProjectCollection("my_app:some_long_collection_name");
    check(r.collection == "some_long_collection_name",
          "qualified: long collection preserved");
}

void test_empty_input_throws() {
    check_throws([] { parseProjectCollection(""); },
                 "empty input must throw");
}

void test_leading_colon_throws() {
    check_throws([] { parseProjectCollection(":users"); },
                 "leading ':' must throw (empty project)");
}

void test_trailing_colon_throws() {
    check_throws([] { parseProjectCollection("my_app:"); },
                 "trailing ':' must throw (empty collection)");
}

void test_double_separator_throws() {
    check_throws([] { parseProjectCollection("a:b:c"); },
                 "double ':' must throw (ambiguous)");
}

void test_just_colon_throws() {
    check_throws([] { parseProjectCollection(":"); },
                 "':' alone must throw");
}

void test_valid_project_names() {
    check(isValidProjectName("default"), "'default' is valid");
    check(isValidProjectName("my_app"), "'my_app' is valid");
    check(isValidProjectName("App1"), "'App1' is valid");
    check(isValidProjectName("a-b-c"), "'a-b-c' is valid (dash allowed)");
    check(isValidProjectName("_starts_underscore") == false,
          "'_-prefix is reserved (system)");
    check(isValidProjectName("") == false, "empty is invalid");
    check(isValidProjectName("9starts_digit") == false,
          "digit-start is invalid");
    check(isValidProjectName("has:colon") == false,
          "':' inside name is invalid");
    check(isValidProjectName("has/slash") == false,
          "'/' inside name is invalid (filesystem safety)");
    check(isValidProjectName("has.dot") == false,
          "'.' inside name is invalid");
    check(isValidProjectName("has space") == false,
          "whitespace inside name is invalid");

    std::string too_long(64, 'a');
    check(isValidProjectName(too_long) == false,
          "64+ chars exceeds kMaxProjectNameLen");

    std::string max_len(63, 'a');
    check(isValidProjectName(max_len), "63 chars is the boundary");
}

}  // namespace

int main() {
    test_unqualified_resolves_to_default();
    test_qualified_splits_on_separator();
    test_long_collection_name();
    test_empty_input_throws();
    test_leading_colon_throws();
    test_trailing_colon_throws();
    test_double_separator_throws();
    test_just_colon_throws();
    test_valid_project_names();

    std::cout << "project_addressing: " << g_pass << " passed, "
              << g_fail << " failed\n";
    return g_fail == 0 ? 0 : 1;
}