#pragma once
#include <drogon/HttpClient.h>
#include <drogon/utils/Utilities.h>
#include <functional>
#include <string>

// TODO: Consider implementing OME webhooks for real-time updates instead of polling
// OME supports webhooks for stream events (start/stop/etc) which would be more efficient
// than polling. See: https://airensoft.gitbook.io/ovenmediaengine/access-control/admission-webhooks

class OmeClient {
public:
    static OmeClient& getInstance() {
        static OmeClient instance;
        return instance;
    }
    
    // Get list of active streams
    void getActiveStreams(std::function<void(bool, const Json::Value&)> callback) {
        auto request = createRequest(drogon::Get, "/v1/vhosts/default/apps/app/streams");
        
        getClient()->sendRequest(request, [callback](drogon::ReqResult result, const drogon::HttpResponsePtr& response) {
            if (result == drogon::ReqResult::Ok && response && response->getStatusCode() == drogon::k200OK) {
                try {
                    Json::Value json = *response->getJsonObject();
                    callback(true, json);
                } catch (const std::exception& e) {
                    LOG_ERROR << "Failed to parse OME response: " << e.what();
                    Json::Value empty;
                    callback(false, empty);
                }
            } else {
                LOG_ERROR << "Failed to get active streams from OME";
                Json::Value empty;
                callback(false, empty);
            }
        });
    }
    
    // Get stats for a specific stream
    void getStreamStats(const std::string& streamKey, 
                       std::function<void(bool, const Json::Value&)> callback) {
        std::string path = "/v1/stats/current/vhosts/default/apps/app/streams/" + streamKey;
        auto request = createRequest(drogon::Get, path);
        
        getClient()->sendRequest(request, [callback](drogon::ReqResult result, const drogon::HttpResponsePtr& response) {
            if (result == drogon::ReqResult::Ok && response) {
                if (response->getStatusCode() == drogon::k200OK) {
                    try {
                        Json::Value json = *response->getJsonObject();
                        callback(true, json);
                    } catch (const std::exception& e) {
                        LOG_ERROR << "Failed to parse stats response: " << e.what();
                        Json::Value empty;
                        callback(false, empty);
                    }
                } else {
                    // Not found or error - return empty but success (stream offline)
                    Json::Value empty;
                    callback(true, empty);
                }
            } else {
                LOG_ERROR << "Request to OME failed";
                Json::Value empty;
                callback(false, empty);
            }
        });
    }
    
    // Get detailed stream info including track metadata (resolution, codec, etc.)
    void getStreamInfo(const std::string& streamKey,
                      std::function<void(bool, const Json::Value&)> callback) {
        std::string path = "/v1/vhosts/default/apps/app/streams/" + streamKey;
        auto request = createRequest(drogon::Get, path);
        
        getClient()->sendRequest(request, [callback](drogon::ReqResult result, const drogon::HttpResponsePtr& response) {
            if (result == drogon::ReqResult::Ok && response) {
                if (response->getStatusCode() == drogon::k200OK) {
                    try {
                        Json::Value json = *response->getJsonObject();
                        callback(true, json);
                    } catch (const std::exception& e) {
                        LOG_ERROR << "Failed to parse stream info response: " << e.what();
                        Json::Value empty;
                        callback(false, empty);
                    }
                } else {
                    // Stream not found or error
                    Json::Value empty;
                    callback(false, empty);
                }
            } else {
                LOG_ERROR << "Stream info request to OME failed";
                Json::Value empty;
                callback(false, empty);
            }
        });
    }
    
    // Disconnect a stream
    void disconnectStream(const std::string& streamId, 
                         std::function<void(bool)> callback) {
        std::string path = "/v1/vhosts/default/apps/app/streams/" + streamId;
        auto request = createRequest(drogon::Delete, path);
        
        getClient()->sendRequest(request, [callback](drogon::ReqResult result, const drogon::HttpResponsePtr& response) {
            bool success = (result == drogon::ReqResult::Ok && 
                           response && 
                           response->getStatusCode() == drogon::k200OK);
            callback(success);
        });
    }
    
private:
    OmeClient() = default;
    ~OmeClient() = default;
    OmeClient(const OmeClient&) = delete;
    OmeClient& operator=(const OmeClient&) = delete;
    
    std::string getBaseUrl() {
        // Check environment variable first
        const char* envUrl = std::getenv("OME_API_URL");
        if (envUrl) {
            return std::string(envUrl);
        }
        
        // Try to get from Drogon config
        try {
            const auto& config = drogon::app().getCustomConfig();
            if (config.isMember("ome") && config["ome"].isMember("api_url")) {
                return config["ome"]["api_url"].asString();
            }
        } catch (...) {
            // Config not available
        }
        
        return "http://ovenmediaengine:8081"; // Default
    }
    
    std::string getApiToken() {
        // Check environment variable first
        const char* envToken = std::getenv("OME_API_TOKEN");
        if (envToken) {
            return std::string(envToken);
        }
        
        // Try to get from Drogon config
        try {
            const auto& config = drogon::app().getCustomConfig();
            if (config.isMember("ome") && config["ome"].isMember("api_token")) {
                return config["ome"]["api_token"].asString();
            }
        } catch (...) {
            // Config not available
        }
        
        return "your-api-token"; // Default
    }
    
    drogon::HttpClientPtr getClient() {
        return drogon::HttpClient::newHttpClient(getBaseUrl());
    }
    
    drogon::HttpRequestPtr createRequest(drogon::HttpMethod method, const std::string& path) {
        auto request = drogon::HttpRequest::newHttpRequest();
        request->setMethod(method);
        request->setPath(path);
        
        // Add authorization header (OME uses Basic auth with token as username)
        const auto token = getApiToken();
        const auto b64 = drogon::utils::base64Encode(token);
        request->addHeader("Authorization", std::string("Basic ") + b64);
        
        return request;
    }
};