// MCP WebSocket Transport tests
// Catch2 migration from GTest (yams-3s4 / yams-84g)
// Note: Most tests disabled in original due to WebSocketTransport implementation status

#include <catch2/catch_test_macros.hpp>

#include <nlohmann/json.hpp>
#include <atomic>
#include <chrono>
#include <thread>

#include <yams/mcp/error_handling.h>
#include <yams/mcp/mcp_server.h>

using namespace yams::mcp;
using json = nlohmann::json;

// WebSocket transport tests are disabled in the original GTest file
// because WebSocketTransport may not be fully implemented.
// These tests are kept as placeholders for when it becomes available.

#if 0 // Disabled: WebSocketTransport not fully implemented

namespace {

class WebSocketTransportFixture {
public:
    WebSocketTransport::Config config;

    WebSocketTransportFixture() {
        // Default configuration for testing
        config.host = "localhost";
        config.port = 8080;
        config.path = "/mcp";
        config.useSSL = false;
        config.connectTimeout = std::chrono::milliseconds{1000};
        config.receiveTimeout = std::chrono::milliseconds{5000};
        config.maxMessageSize = 1024 * 1024;
        config.enablePingPong = true;
        config.pingInterval = std::chrono::seconds{30};
    }
};

} // namespace

TEST_CASE_METHOD(WebSocketTransportFixture, "WebSocketTransport - Configuration",
                 "[mcp][transport][websocket][catch2]") {
    WebSocketTransport transport(config);

    // Test that transport can be created with valid configuration
    CHECK_FALSE(transport.isConnected());

    // Configuration should be preserved
    REQUIRE_NOTHROW(transport.close());
}

TEST_CASE_METHOD(WebSocketTransportFixture, "WebSocketTransport - Configuration validation",
                 "[mcp][transport][websocket][catch2]") {
    // Valid configuration
    WebSocketTransport::Config validConfig = config;
    REQUIRE_NOTHROW(WebSocketTransport transport(validConfig));

    // Test with SSL enabled
    WebSocketTransport::Config sslConfig = config;
    sslConfig.useSSL = true;
    sslConfig.port = 443;
    REQUIRE_NOTHROW(WebSocketTransport transport(sslConfig));

    // Test with custom timeouts
    WebSocketTransport::Config timeoutConfig = config;
    timeoutConfig.connectTimeout = std::chrono::milliseconds{10000};
    timeoutConfig.receiveTimeout = std::chrono::milliseconds{30000};
    REQUIRE_NOTHROW(WebSocketTransport transport(timeoutConfig));
}

TEST_CASE_METHOD(WebSocketTransportFixture, "WebSocketTransport - Connection failure",
                 "[mcp][transport][websocket][catch2]") {
    // Test connection to non-existent server
    WebSocketTransport transport(config);

    // Should not be connected initially
    CHECK_FALSE(transport.isConnected());

    // Connection should fail (no server running on localhost:8080)
    bool connected = transport.connect();
    CHECK_FALSE(connected);
    CHECK_FALSE(transport.isConnected());
}

TEST_CASE_METHOD(WebSocketTransportFixture, "WebSocketTransport - Connection timeout",
                 "[mcp][transport][websocket][catch2]") {
    // Test connection timeout with very short timeout
    WebSocketTransport::Config timeoutConfig = config;
    timeoutConfig.connectTimeout = std::chrono::milliseconds{100}; // Very short timeout

    WebSocketTransport transport(timeoutConfig);

    auto start = std::chrono::steady_clock::now();
    bool connected = transport.connect();
    auto end = std::chrono::steady_clock::now();

    CHECK_FALSE(connected);

    // Should timeout within reasonable time (allowing some margin)
    auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
    CHECK(duration.count() < 1000); // Should be much less than 1 second
}

TEST_CASE_METHOD(WebSocketTransportFixture, "WebSocketTransport - Send without connection",
                 "[mcp][transport][websocket][catch2]") {
    WebSocketTransport transport(config);

    json testMessage = {{"jsonrpc", "2.0"}, {"method", "test"}, {"id", 1}};

    // Should throw exception when trying to send without connection
    REQUIRE_THROWS_AS(transport.send(testMessage), std::runtime_error);
}

#endif // Disabled WebSocket tests

// Placeholder test to ensure the test file compiles
TEST_CASE("WebSocketTransport - Placeholder", "[mcp][transport][websocket][catch2][placeholder]") {
    // WebSocket transport tests are disabled pending full implementation
    SUCCEED("WebSocket transport tests are disabled - placeholder test passes");
}