#include <shared/testing/ITestModule.h>
#include <grove/JsonDataNode.h>
#include <grove/IIO.h>
#include <spdlog/spdlog.h>
#include <chrono>
#include <thread>

namespace celuna::testing {

/**
 * @brief Test MCP tool get_current_time via AIModule
 *
 * Workflow:
 * 1. Publish ai:query with "Quelle heure est-il ?"
 * 2. Wait for llm:response (timeout 30s)
 * 3. Validate response contains timestamp
 */
class IT_001_GetCurrentTime : public ITestModule {
public:
    std::string getTestName() const override {
        return "IT_001_GetCurrentTime";
    }

    std::string getDescription() const override {
        return "Test MCP tool get_current_time via AI";
    }

    void setConfiguration(const grove::IDataNode& config,
                         grove::IIO* io,
                         grove::ITaskScheduler* scheduler) override {
        m_io = io;
        m_scheduler = scheduler;
        m_timeout = config.getInt("timeoutMs", 30000); // 30s for LLM

        // Subscribe to LLM response
        grove::SubscriptionConfig subConfig;
        m_io->subscribe("llm:response", subConfig);
        m_io->subscribe("llm:error", subConfig);

        spdlog::info("[{}] Configured with timeout={}ms", getTestName(), m_timeout);
    }

    void process(const grove::IDataNode& input) override {
        // Not used in test mode
    }

    void shutdown() override {}

    const grove::IDataNode& getConfiguration() override {
        static grove::JsonDataNode config("config");
        return config;
    }

    std::unique_ptr<grove::IDataNode> getHealthStatus() override {
        auto status = std::make_unique<grove::JsonDataNode>("health");
        status->setString("status", "healthy");
        return status;
    }

    std::unique_ptr<grove::IDataNode> getState() override {
        return std::make_unique<grove::JsonDataNode>("state");
    }

    void setState(const grove::IDataNode& state) override {}

    std::string getType() const override { return "IT_001_GetCurrentTime"; }
    int getVersion() const override { return 1; }
    bool isIdle() const override { return true; }

    TestResult execute() override {
        auto start = std::chrono::steady_clock::now();
        TestResult result;
        result.testName = getTestName();

        try {
            spdlog::info("[{}] Sending query to AI...", getTestName());

            // 1. Send query to AI
            auto request = std::make_unique<grove::JsonDataNode>("request");
            request->setString("query", "Quelle heure est-il exactement maintenant ?");
            request->setString("conversationId", "it001");
            m_io->publish("ai:query", std::move(request));

            // 2. Wait for response
            auto response = waitForMessage("llm:response", m_timeout);

            if (!response) {
                // Check for error message
                auto error = waitForMessage("llm:error", 1000);
                if (error) {
                    result.passed = false;
                    result.message = "LLM error: " + error->getString("message", "Unknown");
                    result.details["error"] = error->getString("message", "");
                } else {
                    result.passed = false;
                    result.message = "Timeout waiting for llm:response";
                }
                return result;
            }

            // 3. Validate response
            std::string text = response->getString("text", "");
            if (text.empty()) {
                result.passed = false;
                result.message = "Empty response from LLM";
                return result;
            }

            spdlog::info("[{}] Received response: {}", getTestName(), text);

            // 4. Check for time indicators (simple heuristic)
            bool hasTime = (text.find(":") != std::string::npos) &&
                          (text.find("h") != std::string::npos ||
                           text.find("H") != std::string::npos ||
                           std::isdigit(text[0]));

            result.passed = hasTime;
            result.message = hasTime ? "Tool returned valid time"
                                     : "No valid timestamp in response";
            result.details["response"] = text;

        } catch (const std::exception& e) {
            result.passed = false;
            result.message = std::string("Exception: ") + e.what();
            spdlog::error("[{}] {}", getTestName(), result.message);
        }

        auto end = std::chrono::steady_clock::now();
        result.durationMs = std::chrono::duration_cast<std::chrono::milliseconds>(
            end - start).count();

        return result;
    }

private:
    std::unique_ptr<grove::IDataNode> waitForMessage(
        const std::string& topic, int timeoutMs) {

        auto start = std::chrono::steady_clock::now();

        while (true) {
            if (m_io->hasMessages() > 0) {
                auto msg = m_io->pullMessage();
                if (msg.topic == topic && msg.data) {
                    return std::move(msg.data);
                }
            }

            auto elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(
                std::chrono::steady_clock::now() - start).count();

            if (elapsed > timeoutMs) {
                return nullptr;
            }

            std::this_thread::sleep_for(std::chrono::milliseconds(100));
        }
    }

    grove::IIO* m_io = nullptr;
    grove::ITaskScheduler* m_scheduler = nullptr;
    int m_timeout = 30000;
};

} // namespace celuna::testing

// Factory functions
extern "C" {
    grove::IModule* createModule() {
        return new celuna::testing::IT_001_GetCurrentTime();
    }

    void destroyModule(grove::IModule* module) {
        delete module;
    }
}
