#include "ChatController.h"
#include "ChatWebSocketController.h"
#include "../services/ChatService.h"
#include "../services/AuthService.h"
#include <json/json.h>

void ChatController::getMessages(const HttpRequestPtr& req,
                                  std::function<void(const HttpResponsePtr&)>&& callback,
                                  const std::string& realmId) {
    auto& chatService = services::ChatService::getInstance();

    auto limitParam = req->getParameter("limit");
    int limit = limitParam.empty() ? 100 : std::stoi(limitParam);

    auto beforeParam = req->getParameter("before");
    int64_t before = beforeParam.empty() ? 0 : std::stoll(beforeParam);

    auto messages = chatService.getRealmMessages(realmId, limit, before);

    Json::Value response;
    response["messages"] = Json::arrayValue;
    for (const auto& msg : messages) {
        response["messages"].append(msg.toJson());
    }

    auto resp = HttpResponse::newHttpJsonResponse(response);
    callback(resp);
}

void ChatController::sendMessage(const HttpRequestPtr& req,
                                  std::function<void(const HttpResponsePtr&)>&& callback) {
    // This endpoint is mainly for testing; WebSocket is preferred
    auto jsonPtr = req->getJsonObject();
    if (!jsonPtr) {
        Json::Value error;
        error["error"] = "Invalid JSON";
        auto resp = HttpResponse::newHttpJsonResponse(error);
        resp->setStatusCode(k400BadRequest);
        callback(resp);
        return;
    }

    auto& json = *jsonPtr;
    std::string realmId = json.get("realmId", "").asString();
    std::string content = json.get("content", "").asString();

    if (realmId.empty() || content.empty()) {
        Json::Value error;
        error["error"] = "Missing required fields";
        auto resp = HttpResponse::newHttpJsonResponse(error);
        resp->setStatusCode(k400BadRequest);
        callback(resp);
        return;
    }

    // Get user from token
    auto& authService = services::AuthService::getInstance();
    auto token = req->getHeader("Authorization");
    if (token.find("Bearer ") == 0) {
        token = token.substr(7);
    }

    auto claims = authService.verifyToken(token);
    if (!claims.has_value()) {
        Json::Value error;
        error["error"] = "Unauthorized";
        auto resp = HttpResponse::newHttpJsonResponse(error);
        resp->setStatusCode(k401Unauthorized);
        callback(resp);
        return;
    }

    auto& chatService = services::ChatService::getInstance();
    models::ChatMessage message;

    auto result = chatService.sendMessage(
        realmId, claims->userId, claims->username, claims->userColor, claims->avatarUrl, content,
        false, false, false, message
    );

    if (result == services::SendMessageResult::SUCCESS) {
        auto resp = HttpResponse::newHttpJsonResponse(message.toJson());
        callback(resp);
    } else {
        Json::Value error;
        error["error"] = "Failed to send message";
        error["reason"] = static_cast<int>(result);
        auto resp = HttpResponse::newHttpJsonResponse(error);
        resp->setStatusCode(k400BadRequest);
        callback(resp);
    }
}

void ChatController::deleteMessage(const HttpRequestPtr& req,
                                    std::function<void(const HttpResponsePtr&)>&& callback,
                                    const std::string& messageId) {
    // Verify user is moderator
    auto& authService = services::AuthService::getInstance();
    auto token = req->getHeader("Authorization");
    if (token.find("Bearer ") == 0) {
        token = token.substr(7);
    }

    auto claims = authService.verifyToken(token);
    if (!claims.has_value()) {
        Json::Value error;
        error["error"] = "Unauthorized";
        auto resp = HttpResponse::newHttpJsonResponse(error);
        resp->setStatusCode(k401Unauthorized);
        callback(resp);
        return;
    }

    std::string realmId = req->getParameter("realmId");
    auto& chatService = services::ChatService::getInstance();

    bool success = chatService.deleteMessage(realmId, messageId, claims->userId);

    Json::Value response;
    response["success"] = success;
    auto resp = HttpResponse::newHttpJsonResponse(response);
    callback(resp);
}

void ChatController::getSettings(const HttpRequestPtr& req,
                                  std::function<void(const HttpResponsePtr&)>&& callback,
                                  const std::string& realmId) {
    auto& chatService = services::ChatService::getInstance();
    auto settings = chatService.getRealmSettings(realmId);

    auto resp = HttpResponse::newHttpJsonResponse(settings.toJson());
    callback(resp);
}

void ChatController::updateSettings(const HttpRequestPtr& req,
                                     std::function<void(const HttpResponsePtr&)>&& callback,
                                     const std::string& realmId) {
    auto jsonPtr = req->getJsonObject();
    if (!jsonPtr) {
        Json::Value error;
        error["error"] = "Invalid JSON";
        auto resp = HttpResponse::newHttpJsonResponse(error);
        resp->setStatusCode(k400BadRequest);
        callback(resp);
        return;
    }

    // Verify user is realm owner or moderator
    auto& authService = services::AuthService::getInstance();
    auto token = req->getHeader("Authorization");
    if (token.find("Bearer ") == 0) {
        token = token.substr(7);
    }

    auto claims = authService.verifyToken(token);
    if (!claims.has_value()) {
        Json::Value error;
        error["error"] = "Unauthorized";
        auto resp = HttpResponse::newHttpJsonResponse(error);
        resp->setStatusCode(k401Unauthorized);
        callback(resp);
        return;
    }

    auto settings = models::ChatSettings::fromJson(*jsonPtr);
    settings.realmId = realmId;

    auto& chatService = services::ChatService::getInstance();
    bool success = chatService.updateRealmSettings(realmId, settings);

    Json::Value response;
    response["success"] = success;
    response["settings"] = settings.toJson();
    auto resp = HttpResponse::newHttpJsonResponse(response);
    callback(resp);
}

void ChatController::getRealmStats(const HttpRequestPtr& req,
                                    std::function<void(const HttpResponsePtr&)>&& callback) {
    // Get realm stats from WebSocket controller (active connections per realm)
    auto stats = ChatWebSocketController::getRealmStats();
    auto resp = HttpResponse::newHttpJsonResponse(stats);
    callback(resp);
}