#include "modules/hyprland/workspaces.hpp"

#include <json/value.h>
#include <spdlog/spdlog.h>

#include <algorithm>
#include <memory>
#include <sstream>
#include <string>
#include <utility>

#include "util/regex_collection.hpp"
#include "util/string.hpp"

namespace waybar::modules::hyprland {

Workspaces::Workspaces(const std::string &id, const Bar &bar, const Json::Value &config)
    : AModule(config, "workspaces", id, false, false),
      m_bar(bar),
      m_box(bar.orientation, 0),
      m_ipc(IPC::inst()) {
  modulesReady = true;
  parseConfig(config);

  m_box.set_name("workspaces");
  if (!id.empty()) {
    m_box.get_style_context()->add_class(id);
  }
  m_box.get_style_context()->add_class(MODULE_CLASS);
  event_box_.add(m_box);

  setCurrentMonitorId();
  init();
  registerIpc();
}

Workspaces::~Workspaces() {
  m_ipc.unregisterForIPC(this);
  // wait for possible event handler to finish
  std::lock_guard<std::mutex> lg(m_mutex);
}

void Workspaces::init() {
  m_activeWorkspaceId = m_ipc.getSocket1JsonReply("activeworkspace")["id"].asInt();

  initializeWorkspaces();
  dp.emit();
}

Json::Value Workspaces::createMonitorWorkspaceData(std::string const &name,
                                                   std::string const &monitor) {
  spdlog::trace("Creating persistent workspace: {} on monitor {}", name, monitor);
  Json::Value workspaceData;

  auto workspaceId = parseWorkspaceId(name);
  if (!workspaceId.has_value()) {
    workspaceId = 0;
  }
  workspaceData["id"] = *workspaceId;
  workspaceData["name"] = name;
  workspaceData["monitor"] = monitor;
  workspaceData["windows"] = 0;
  return workspaceData;
}

void Workspaces::createWorkspace(Json::Value const &workspace_data,
                                 Json::Value const &clients_data) {
  auto workspaceName = workspace_data["name"].asString();
  auto workspaceId = workspace_data["id"].asInt();
  spdlog::debug("Creating workspace {}", workspaceName);

  // avoid recreating existing workspaces
  auto workspace = std::ranges::find_if(m_workspaces, [&](std::unique_ptr<Workspace> const &w) {
    if (workspaceId > 0) {
      return w->id() == workspaceId;
    }
    return (workspaceName.starts_with("special:") && workspaceName.substr(8) == w->name()) ||
           workspaceName == w->name();
  });

  if (workspace != m_workspaces.end()) {
    // don't recreate workspace, but update persistency if necessary
    const auto keys = workspace_data.getMemberNames();

    const auto *k = "persistent-rule";
    if (std::ranges::find(keys, k) != keys.end()) {
      spdlog::debug("Set dynamic persistency of workspace {} to: {}", workspaceName,
                    workspace_data[k].asBool() ? "true" : "false");
      (*workspace)->setPersistentRule(workspace_data[k].asBool());
    }

    k = "persistent-config";
    if (std::ranges::find(keys, k) != keys.end()) {
      spdlog::debug("Set config persistency of workspace {} to: {}", workspaceName,
                    workspace_data[k].asBool() ? "true" : "false");
      (*workspace)->setPersistentConfig(workspace_data[k].asBool());
    }

    return;
  }

  // create new workspace
  m_workspaces.emplace_back(std::make_unique<Workspace>(workspace_data, *this, clients_data));
  Gtk::Button &newWorkspaceButton = m_workspaces.back()->button();
  m_box.pack_start(newWorkspaceButton, false, false);
  sortWorkspaces();
  newWorkspaceButton.show_all();
}

void Workspaces::createWorkspacesToCreate() {
  for (const auto &[workspaceData, clientsData] : m_workspacesToCreate) {
    createWorkspace(workspaceData, clientsData);
  }
  if (!m_workspacesToCreate.empty()) {
    updateWindowCount();
    sortWorkspaces();
  }
  m_workspacesToCreate.clear();
}

/**
 *  Workspaces::doUpdate - update workspaces in UI thread.
 *
 * Note: some memberfields are modified by both UI thread and event listener thread, use m_mutex to
 *       protect these member fields, and lock should released before calling AModule::update().
 */
void Workspaces::doUpdate() {
  std::unique_lock lock(m_mutex);

  removeWorkspacesToRemove();
  createWorkspacesToCreate();
  updateWorkspaceStates();
  updateWindowCount();
  sortWorkspaces();

  bool anyWindowCreated = updateWindowsToCreate();

  if (anyWindowCreated) {
    dp.emit();
  }
}

void Workspaces::extendOrphans(int workspaceId, Json::Value const &clientsJson) {
  spdlog::trace("Extending orphans with workspace {}", workspaceId);
  for (const auto &client : clientsJson) {
    if (client["workspace"]["id"].asInt() == workspaceId) {
      registerOrphanWindow({client});
    }
  }
}

std::string Workspaces::getRewrite(std::string window_class, std::string window_title) {
  std::string windowReprKey;
  if (windowRewriteConfigUsesTitle()) {
    windowReprKey = fmt::format("class<{}> title<{}>", window_class, window_title);
  } else {
    windowReprKey = fmt::format("class<{}>", window_class);
  }
  auto const rewriteRule = m_windowRewriteRules.get(windowReprKey);
  return fmt::format(fmt::runtime(rewriteRule), fmt::arg("class", window_class),
                     fmt::arg("title", window_title));
}

std::vector<int> Workspaces::getVisibleWorkspaces() {
  std::vector<int> visibleWorkspaces;
  auto monitors = IPC::inst().getSocket1JsonReply("monitors");
  for (const auto &monitor : monitors) {
    auto ws = monitor["activeWorkspace"];
    if (ws.isObject() && ws["id"].isInt()) {
      visibleWorkspaces.push_back(ws["id"].asInt());
    }
    auto sws = monitor["specialWorkspace"];
    auto name = sws["name"].asString();
    if (sws.isObject() && sws["id"].isInt() && !name.empty()) {
      visibleWorkspaces.push_back(sws["id"].asInt());
    }
  }
  return visibleWorkspaces;
}

void Workspaces::initializeWorkspaces() {
  spdlog::debug("Initializing workspaces");

  // if the workspace rules changed since last initialization, make sure we reset everything:
  for (auto &workspace : m_workspaces) {
    m_workspacesToRemove.push_back(std::to_string(workspace->id()));
  }

  // get all current workspaces
  auto const workspacesJson = m_ipc.getSocket1JsonReply("workspaces");
  auto const clientsJson = m_ipc.getSocket1JsonReply("clients");

  for (Json::Value workspaceJson : workspacesJson) {
    std::string workspaceName = workspaceJson["name"].asString();
    if ((allOutputs() || m_bar.output->name == workspaceJson["monitor"].asString()) &&
        (!workspaceName.starts_with("special") || showSpecial()) &&
        !isWorkspaceIgnored(workspaceName)) {
      m_workspacesToCreate.emplace_back(workspaceJson, clientsJson);
    } else {
      extendOrphans(workspaceJson["id"].asInt(), clientsJson);
    }
  }

  spdlog::debug("Initializing persistent workspaces");
  if (m_persistentWorkspaceConfig.isObject()) {
    // a persistent workspace config is defined, so use that instead of workspace rules
    loadPersistentWorkspacesFromConfig(clientsJson);
  }
  // load Hyprland's workspace rules
  loadPersistentWorkspacesFromWorkspaceRules(clientsJson);
}

bool isDoubleSpecial(std::string const &workspace_name) {
  // Hyprland's IPC sometimes reports the creation of workspaces strangely named
  // `special:special:<some_name>`. This function checks for that and is used
  // to avoid creating (and then removing) such workspaces.
  // See hyprwm/Hyprland#3424 for more info.
  return workspace_name.find("special:special:") != std::string::npos;
}

bool Workspaces::isWorkspaceIgnored(std::string const &name) {
  for (auto &rule : m_ignoreWorkspaces) {
    if (std::regex_match(name, rule)) {
      return true;
      break;
    }
  }

  return false;
}

void Workspaces::loadPersistentWorkspacesFromConfig(Json::Value const &clientsJson) {
  spdlog::info("Loading persistent workspaces from Waybar config");
  const std::vector<std::string> keys = m_persistentWorkspaceConfig.getMemberNames();
  std::vector<std::string> persistentWorkspacesToCreate;

  const std::string currentMonitor = m_bar.output->name;
  const bool monitorInConfig = std::ranges::find(keys, currentMonitor) != keys.end();
  for (const std::string &key : keys) {
    // only add if either:
    // 1. key is the current monitor name
    // 2. key is "*" and this monitor is not already defined in the config
    bool canCreate = key == currentMonitor || (key == "*" && !monitorInConfig);
    const Json::Value &value = m_persistentWorkspaceConfig[key];
    spdlog::trace("Parsing persistent workspace config: {} => {}", key, value.toStyledString());

    if (value.isInt()) {
      // value is a number => create that many workspaces for this monitor
      if (canCreate) {
        int amount = value.asInt();
        spdlog::debug("Creating {} persistent workspaces for monitor {}", amount, currentMonitor);
        for (int i = 0; i < amount; i++) {
          persistentWorkspacesToCreate.emplace_back(std::to_string((m_monitorId * amount) + i + 1));
        }
      }
    } else if (value.isArray() && !value.empty()) {
      // value is an array => create defined workspaces for this monitor
      if (canCreate) {
        for (const Json::Value &workspace : value) {
          spdlog::debug("Creating workspace {} on monitor {}", workspace, currentMonitor);
          persistentWorkspacesToCreate.emplace_back(workspace.asString());
        }
      } else {
        // key is the workspace and value is array of monitors to create on
        for (const Json::Value &monitor : value) {
          if (monitor.isString() && monitor.asString() == currentMonitor) {
            persistentWorkspacesToCreate.emplace_back(currentMonitor);
            break;
          }
        }
      }
    } else {
      // this workspace should be displayed on all monitors
      persistentWorkspacesToCreate.emplace_back(key);
    }
  }

  for (auto const &workspace : persistentWorkspacesToCreate) {
    auto workspaceData = createMonitorWorkspaceData(workspace, m_bar.output->name);
    workspaceData["persistent-config"] = true;
    m_workspacesToCreate.emplace_back(workspaceData, clientsJson);
  }
}

void Workspaces::loadPersistentWorkspacesFromWorkspaceRules(const Json::Value &clientsJson) {
  spdlog::info("Loading persistent workspaces from Hyprland workspace rules");

  auto const workspaceRules = m_ipc.getSocket1JsonReply("workspacerules");
  for (Json::Value const &rule : workspaceRules) {
    if (!rule["workspaceString"].isString()) {
      spdlog::warn("Workspace rules: invalid workspaceString, skipping: {}", rule);
      continue;
    }
    if (!rule["persistent"].asBool()) {
      continue;
    }
    auto workspace = rule.isMember("defaultName") ? rule["defaultName"].asString()
                                                  : rule["workspaceString"].asString();

    // The prefix "name:" cause mismatches with workspace names taken anywhere else.
    if (workspace.starts_with("name:")) {
      workspace = workspace.substr(5);
    }
    auto const &monitor = rule["monitor"].asString();
    // create this workspace persistently if:
    // 1. the allOutputs config option is enabled
    // 2. the rule's monitor is the current monitor
    // 3. no monitor is specified in the rule => assume it needs to be persistent on every monitor
    if (allOutputs() || m_bar.output->name == monitor || monitor.empty()) {
      // => persistent workspace should be shown on this monitor
      auto workspaceData = createMonitorWorkspaceData(workspace, m_bar.output->name);
      workspaceData["persistent-rule"] = true;
      m_workspacesToCreate.emplace_back(workspaceData, clientsJson);
    } else {
      // This can be any workspace selector.
      m_workspacesToRemove.emplace_back(workspace);
    }
  }
}

void Workspaces::onEvent(const std::string &ev) {
  std::lock_guard<std::mutex> lock(m_mutex);
  std::string eventName(begin(ev), begin(ev) + ev.find_first_of('>'));
  std::string payload = ev.substr(eventName.size() + 2);

  if (eventName == "workspacev2") {
    onWorkspaceActivated(payload);
  } else if (eventName == "activespecial") {
    onSpecialWorkspaceActivated(payload);
  } else if (eventName == "destroyworkspacev2") {
    onWorkspaceDestroyed(payload);
  } else if (eventName == "createworkspacev2") {
    onWorkspaceCreated(payload);
  } else if (eventName == "focusedmonv2") {
    onMonitorFocused(payload);
  } else if (eventName == "moveworkspacev2") {
    onWorkspaceMoved(payload);
  } else if (eventName == "openwindow") {
    onWindowOpened(payload);
  } else if (eventName == "closewindow") {
    onWindowClosed(payload);
  } else if (eventName == "movewindowv2") {
    onWindowMoved(payload);
  } else if (eventName == "urgent") {
    setUrgentWorkspace(payload);
  } else if (eventName == "renameworkspace") {
    onWorkspaceRenamed(payload);
  } else if (eventName == "windowtitlev2") {
    onWindowTitleEvent(payload);
  } else if (eventName == "activewindowv2") {
    onActiveWindowChanged(payload);
  } else if (eventName == "configreloaded") {
    onConfigReloaded();
  }

  dp.emit();
}

void Workspaces::onWorkspaceActivated(std::string const &payload) {
  const auto [workspaceIdStr, workspaceName] = splitDoublePayload(payload);
  const auto workspaceId = parseWorkspaceId(workspaceIdStr);
  if (workspaceId.has_value()) {
    m_activeWorkspaceId = *workspaceId;
  }
}

void Workspaces::onSpecialWorkspaceActivated(std::string const &payload) {
  std::string name(begin(payload), begin(payload) + payload.find_first_of(','));
  m_activeSpecialWorkspaceName = (!name.starts_with("special:") ? name : name.substr(8));
}

void Workspaces::onWorkspaceDestroyed(std::string const &payload) {
  const auto [workspaceId, workspaceName] = splitDoublePayload(payload);
  if (!isDoubleSpecial(workspaceName)) {
    m_workspacesToRemove.push_back(workspaceId);
  }
}

void Workspaces::onWorkspaceCreated(std::string const &payload, Json::Value const &clientsData) {
  spdlog::debug("Workspace created: {}", payload);

  const auto [workspaceIdStr, _] = splitDoublePayload(payload);

  const auto workspaceId = parseWorkspaceId(workspaceIdStr);
  if (!workspaceId.has_value()) {
    return;
  }

  auto const workspaceRules = m_ipc.getSocket1JsonReply("workspacerules");
  auto const workspacesJson = m_ipc.getSocket1JsonReply("workspaces");

  for (Json::Value workspaceJson : workspacesJson) {
    const auto currentId = workspaceJson["id"].asInt();
    if (currentId == *workspaceId) {
      std::string workspaceName = workspaceJson["name"].asString();
      // This workspace name is more up-to-date than the one in the event payload.
      if (isWorkspaceIgnored(workspaceName)) {
        spdlog::trace("Not creating workspace because it is ignored: id={} name={}", *workspaceId,
                      workspaceName);
        break;
      }

      if ((allOutputs() || m_bar.output->name == workspaceJson["monitor"].asString()) &&
          (showSpecial() || !workspaceName.starts_with("special")) &&
          !isDoubleSpecial(workspaceName)) {
        for (Json::Value const &rule : workspaceRules) {
          auto ruleWorkspaceName = rule.isMember("defaultName")
                                       ? rule["defaultName"].asString()
                                       : rule["workspaceString"].asString();
          if (ruleWorkspaceName == workspaceName) {
            workspaceJson["persistent-rule"] = rule["persistent"].asBool();
            break;
          }
        }

        m_workspacesToCreate.emplace_back(workspaceJson, clientsData);
        break;
      }
    } else {
      extendOrphans(*workspaceId, clientsData);
    }
  }
}

void Workspaces::onWorkspaceMoved(std::string const &payload) {
  spdlog::debug("Workspace moved: {}", payload);

  // Update active workspace
  m_activeWorkspaceId = (m_ipc.getSocket1JsonReply("activeworkspace"))["id"].asInt();

  if (allOutputs()) return;

  const auto [workspaceIdStr, workspaceName, monitorName] = splitTriplePayload(payload);

  const auto subPayload = makePayload(workspaceIdStr, workspaceName);

  if (m_bar.output->name == monitorName) {
    Json::Value clientsData = m_ipc.getSocket1JsonReply("clients");
    onWorkspaceCreated(subPayload, clientsData);
  } else {
    spdlog::debug("Removing workspace because it was moved to another monitor: {}", subPayload);
    onWorkspaceDestroyed(subPayload);
  }
}

void Workspaces::onWorkspaceRenamed(std::string const &payload) {
  spdlog::debug("Workspace renamed: {}", payload);
  const auto [workspaceIdStr, newName] = splitDoublePayload(payload);

  const auto workspaceId = parseWorkspaceId(workspaceIdStr);
  if (!workspaceId.has_value()) {
    return;
  }

  for (auto &workspace : m_workspaces) {
    if (workspace->id() == *workspaceId) {
      workspace->setName(newName);
      break;
    }
  }
  sortWorkspaces();
}

void Workspaces::onMonitorFocused(std::string const &payload) {
  spdlog::trace("Monitor focused: {}", payload);

  const auto [monitorName, workspaceIdStr] = splitDoublePayload(payload);

  const auto workspaceId = parseWorkspaceId(workspaceIdStr);
  if (!workspaceId.has_value()) {
    return;
  }

  m_activeWorkspaceId = *workspaceId;

  for (Json::Value &monitor : m_ipc.getSocket1JsonReply("monitors")) {
    if (monitor["name"].asString() == monitorName) {
      const auto name = monitor["specialWorkspace"]["name"].asString();
      m_activeSpecialWorkspaceName = !name.starts_with("special:") ? name : name.substr(8);
    }
  }
}

void Workspaces::onWindowOpened(std::string const &payload) {
  spdlog::trace("Window opened: {}", payload);
  updateWindowCount();
  size_t lastCommaIdx = 0;
  size_t nextCommaIdx = payload.find(',');
  std::string windowAddress = payload.substr(lastCommaIdx, nextCommaIdx - lastCommaIdx);

  lastCommaIdx = nextCommaIdx;
  nextCommaIdx = payload.find(',', nextCommaIdx + 1);
  std::string workspaceName = payload.substr(lastCommaIdx + 1, nextCommaIdx - lastCommaIdx - 1);

  lastCommaIdx = nextCommaIdx;
  nextCommaIdx = payload.find(',', nextCommaIdx + 1);
  std::string windowClass = payload.substr(lastCommaIdx + 1, nextCommaIdx - lastCommaIdx - 1);

  std::string windowTitle = payload.substr(nextCommaIdx + 1, payload.length() - nextCommaIdx);

  bool isActive = m_currentActiveWindowAddress == windowAddress;
  m_windowsToCreate.emplace_back(workspaceName, windowAddress, windowClass, windowTitle, isActive);
}

void Workspaces::onWindowClosed(std::string const &addr) {
  spdlog::trace("Window closed: {}", addr);
  updateWindowCount();
  m_orphanWindowMap.erase(addr);
  for (auto &workspace : m_workspaces) {
    if (workspace->closeWindow(addr)) {
      break;
    }
  }
}

void Workspaces::onWindowMoved(std::string const &payload) {
  spdlog::trace("Window moved: {}", payload);
  updateWindowCount();
  auto [windowAddress, _, workspaceName] = splitTriplePayload(payload);

  WindowRepr windowRepr;

  // If the window was still queued to be created, just change its destination
  // and exit
  for (auto &window : m_windowsToCreate) {
    if (window.getAddress() == windowAddress) {
      window.moveToWorkspace(workspaceName);
      return;
    }
  }

  // Take the window's representation from the old workspace...
  for (auto &workspace : m_workspaces) {
    if (auto windowAddr = workspace->closeWindow(windowAddress); windowAddr != std::nullopt) {
      windowRepr = windowAddr.value();
      break;
    }
  }

  // ...if it was empty, check if the window is an orphan...
  if (windowRepr.empty() && m_orphanWindowMap.contains(windowAddress)) {
    windowRepr = m_orphanWindowMap[windowAddress];
  }

  // ...and then add it to the new workspace
  if (!windowRepr.empty()) {
    m_orphanWindowMap.erase(windowAddress);
    m_windowsToCreate.emplace_back(workspaceName, windowAddress, windowRepr);
  }
}

void Workspaces::onWindowTitleEvent(std::string const &payload) {
  spdlog::trace("Window title changed: {}", payload);
  std::optional<std::function<void(WindowCreationPayload)>> inserter;

  const auto [windowAddress, _] = splitDoublePayload(payload);

  // If the window was an orphan, rename it at the orphan's vector
  if (m_orphanWindowMap.contains(windowAddress)) {
    inserter = [this](WindowCreationPayload wcp) { this->registerOrphanWindow(std::move(wcp)); };
  } else {
    auto windowWorkspace = std::ranges::find_if(m_workspaces, [windowAddress](auto &workspace) {
      return workspace->containsWindow(windowAddress);
    });

    // If the window exists on a workspace, rename it at the workspace's window
    // map
    if (windowWorkspace != m_workspaces.end()) {
      inserter = [windowWorkspace](WindowCreationPayload wcp) {
        (*windowWorkspace)->insertWindow(std::move(wcp));
      };
    } else {
      auto queuedWindow =
          std::ranges::find_if(m_windowsToCreate, [&windowAddress](auto &windowPayload) {
            return windowPayload.getAddress() == windowAddress;
          });

      // If the window was queued, rename it in the queue
      if (queuedWindow != m_windowsToCreate.end()) {
        inserter = [queuedWindow](WindowCreationPayload wcp) { *queuedWindow = std::move(wcp); };
      }
    }
  }

  if (inserter.has_value()) {
    Json::Value clientsData = m_ipc.getSocket1JsonReply("clients");
    std::string jsonWindowAddress = fmt::format("0x{}", windowAddress);

    auto client = std::ranges::find_if(clientsData, [jsonWindowAddress](auto &client) {
      return client["address"].asString() == jsonWindowAddress;
    });

    if (client != clientsData.end() && !client->empty()) {
      (*inserter)({*client});
    }
  }
}

void Workspaces::onActiveWindowChanged(WindowAddress const &activeWindowAddress) {
  spdlog::trace("Active window changed: {}", activeWindowAddress);
  m_currentActiveWindowAddress = activeWindowAddress;

  for (auto &[address, window] : m_orphanWindowMap) {
    window.setActive(address == activeWindowAddress);
  }
  for (auto const &workspace : m_workspaces) {
    workspace->setActiveWindow(activeWindowAddress);
  }
  for (auto &window : m_windowsToCreate) {
    window.setActive(window.getAddress() == activeWindowAddress);
  }
}

void Workspaces::onConfigReloaded() {
  spdlog::info("Hyprland config reloaded, reinitializing hyprland/workspaces module...");
  init();
}

auto Workspaces::parseConfig(const Json::Value &config) -> void {
  const auto &configFormat = config["format"];
  m_formatBefore = configFormat.isString() ? configFormat.asString() : "{name}";
  m_withIcon = m_formatBefore.find("{icon}") != std::string::npos;
  auto withWindows = m_formatBefore.find("{windows}") != std::string::npos;

  if (m_withIcon && m_iconsMap.empty()) {
    populateIconsMap(config["format-icons"]);
  }

  populateBoolConfig(config, "all-outputs", m_allOutputs);
  populateBoolConfig(config, "show-special", m_showSpecial);
  populateBoolConfig(config, "special-visible-only", m_specialVisibleOnly);
  populateBoolConfig(config, "persistent-only", m_persistentOnly);
  populateBoolConfig(config, "active-only", m_activeOnly);
  populateBoolConfig(config, "move-to-monitor", m_moveToMonitor);

  m_persistentWorkspaceConfig = config.get("persistent-workspaces", Json::Value());
  populateSortByConfig(config);
  populateIgnoreWorkspacesConfig(config);
  populateFormatWindowSeparatorConfig(config);
  populateWindowRewriteConfig(config);

  if (withWindows) {
    populateWorkspaceTaskbarConfig(config);
  }
  if (m_enableTaskbar) {
    auto parts = split(m_formatBefore, "{windows}", 1);
    m_formatBefore = parts[0];
    m_formatAfter = parts.size() > 1 ? parts[1] : "";
  }
}

auto Workspaces::populateIconsMap(const Json::Value &formatIcons) -> void {
  for (const auto &name : formatIcons.getMemberNames()) {
    m_iconsMap.emplace(name, formatIcons[name].asString());
  }
  m_iconsMap.emplace("", "");
}

auto Workspaces::populateBoolConfig(const Json::Value &config, const std::string &key, bool &member)
    -> void {
  const auto &configValue = config[key];
  if (configValue.isBool()) {
    member = configValue.asBool();
  }
}

auto Workspaces::populateSortByConfig(const Json::Value &config) -> void {
  const auto &configSortBy = config["sort-by"];
  if (configSortBy.isString()) {
    auto sortByStr = configSortBy.asString();
    try {
      m_sortBy = m_enumParser.parseStringToEnum(sortByStr, m_sortMap);
    } catch (const std::invalid_argument &e) {
      m_sortBy = SortMethod::DEFAULT;
      spdlog::warn(
          "Invalid string representation for sort-by. Falling back to default sort method.");
    }
  }
}

auto Workspaces::populateIgnoreWorkspacesConfig(const Json::Value &config) -> void {
  auto ignoreWorkspaces = config["ignore-workspaces"];
  if (ignoreWorkspaces.isArray()) {
    for (const auto &workspaceRegex : ignoreWorkspaces) {
      if (workspaceRegex.isString()) {
        std::string ruleString = workspaceRegex.asString();
        try {
          const std::regex rule{ruleString, std::regex_constants::icase};
          m_ignoreWorkspaces.emplace_back(rule);
        } catch (const std::regex_error &e) {
          spdlog::error("Invalid rule {}: {}", ruleString, e.what());
        }
      } else {
        spdlog::error("Not a string: '{}'", workspaceRegex);
      }
    }
  }
}

auto Workspaces::populateFormatWindowSeparatorConfig(const Json::Value &config) -> void {
  const auto &formatWindowSeparator = config["format-window-separator"];
  m_formatWindowSeparator =
      formatWindowSeparator.isString() ? formatWindowSeparator.asString() : " ";
}

auto Workspaces::populateWindowRewriteConfig(const Json::Value &config) -> void {
  const auto &windowRewrite = config["window-rewrite"];
  if (!windowRewrite.isObject()) {
    spdlog::debug("window-rewrite is not defined or is not an object, using default rules.");
    return;
  }

  const auto &windowRewriteDefaultConfig = config["window-rewrite-default"];
  std::string windowRewriteDefault =
      windowRewriteDefaultConfig.isString() ? windowRewriteDefaultConfig.asString() : "?";

  m_windowRewriteRules = util::RegexCollection(
      windowRewrite, windowRewriteDefault,
      [this](std::string &window_rule) { return windowRewritePriorityFunction(window_rule); });
}

auto Workspaces::populateWorkspaceTaskbarConfig(const Json::Value &config) -> void {
  const auto &workspaceTaskbar = config["workspace-taskbar"];
  if (!workspaceTaskbar.isObject()) {
    spdlog::debug("workspace-taskbar is not defined or is not an object, using default rules.");
    return;
  }

  populateBoolConfig(workspaceTaskbar, "enable", m_enableTaskbar);
  populateBoolConfig(workspaceTaskbar, "update-active-window", m_updateActiveWindow);

  if (workspaceTaskbar["format"].isString()) {
    /* The user defined a format string, use it */
    std::string format = workspaceTaskbar["format"].asString();
    m_taskbarWithTitle = format.find("{title") != std::string::npos; /* {title} or {title.length} */
    auto parts = split(format, "{icon}", 1);
    m_taskbarFormatBefore = parts[0];
    if (parts.size() > 1) {
      m_taskbarWithIcon = true;
      m_taskbarFormatAfter = parts[1];
    }
  } else {
    /* The default is to only show the icon */
    m_taskbarWithIcon = true;
  }

  auto iconTheme = workspaceTaskbar["icon-theme"];
  if (iconTheme.isArray()) {
    for (auto &c : iconTheme) {
      m_iconLoader.add_custom_icon_theme(c.asString());
    }
  } else if (iconTheme.isString()) {
    m_iconLoader.add_custom_icon_theme(iconTheme.asString());
  }

  if (workspaceTaskbar["icon-size"].isInt()) {
    m_taskbarIconSize = workspaceTaskbar["icon-size"].asInt();
  }
  if (workspaceTaskbar["orientation"].isString() &&
      toLower(workspaceTaskbar["orientation"].asString()) == "vertical") {
    m_taskbarOrientation = Gtk::ORIENTATION_VERTICAL;
  }

  if (workspaceTaskbar["on-click-window"].isString()) {
    m_onClickWindow = workspaceTaskbar["on-click-window"].asString();
  }

  if (workspaceTaskbar["ignore-list"].isArray()) {
    for (auto &windowRegex : workspaceTaskbar["ignore-list"]) {
      std::string ruleString = windowRegex.asString();
      try {
        m_ignoreWindows.emplace_back(ruleString, std::regex_constants::icase);
      } catch (const std::regex_error &e) {
        spdlog::error("Invalid rule {}: {}", ruleString, e.what());
      }
    }
  }
}

void Workspaces::registerOrphanWindow(WindowCreationPayload create_window_payload) {
  if (!create_window_payload.isEmpty(*this)) {
    m_orphanWindowMap[create_window_payload.getAddress()] = create_window_payload.repr(*this);
  }
}

auto Workspaces::registerIpc() -> void {
  m_ipc.registerForIPC("workspacev2", this);
  m_ipc.registerForIPC("activespecial", this);
  m_ipc.registerForIPC("createworkspacev2", this);
  m_ipc.registerForIPC("destroyworkspacev2", this);
  m_ipc.registerForIPC("focusedmonv2", this);
  m_ipc.registerForIPC("moveworkspacev2", this);
  m_ipc.registerForIPC("renameworkspace", this);
  m_ipc.registerForIPC("openwindow", this);
  m_ipc.registerForIPC("closewindow", this);
  m_ipc.registerForIPC("movewindowv2", this);
  m_ipc.registerForIPC("urgent", this);
  m_ipc.registerForIPC("configreloaded", this);

  if (windowRewriteConfigUsesTitle() || m_taskbarWithTitle) {
    spdlog::info(
        "Registering for Hyprland's 'windowtitlev2' events because a user-defined window "
        "rewrite rule uses the 'title' field.");
    m_ipc.registerForIPC("windowtitlev2", this);
  }
  if (m_updateActiveWindow) {
    spdlog::info(
        "Registering for Hyprland's 'activewindowv2' events because 'update-active-window' is set "
        "to true.");
    m_ipc.registerForIPC("activewindowv2", this);
  }
}

void Workspaces::removeWorkspacesToRemove() {
  for (const auto &workspaceString : m_workspacesToRemove) {
    removeWorkspace(workspaceString);
  }
  m_workspacesToRemove.clear();
}

void Workspaces::removeWorkspace(std::string const &workspaceString) {
  spdlog::debug("Removing workspace {}", workspaceString);

  // If this succeeds, we have a workspace ID.
  const auto workspaceId = parseWorkspaceId(workspaceString);

  std::string name;
  // TODO: At some point we want to support all workspace selectors
  // This is just a subset.
  // https://wiki.hyprland.org/Configuring/Workspace-Rules/#workspace-selectors
  if (workspaceString.starts_with("special:")) {
    name = workspaceString.substr(8);
  } else if (workspaceString.starts_with("name:")) {
    name = workspaceString.substr(5);
  } else {
    name = workspaceString;
  }

  const auto workspace = std::ranges::find_if(m_workspaces, [&](std::unique_ptr<Workspace> &x) {
    if (workspaceId.has_value()) {
      return *workspaceId == x->id();
    }
    return name == x->name();
  });

  if (workspace == m_workspaces.end()) {
    // happens when a workspace on another monitor is destroyed
    return;
  }

  if ((*workspace)->isPersistentConfig()) {
    spdlog::trace("Not removing config persistent workspace id={} name={}", (*workspace)->id(),
                  (*workspace)->name());
    return;
  }

  m_box.remove(workspace->get()->button());
  m_workspaces.erase(workspace);
}

void Workspaces::setCurrentMonitorId() {
  // get monitor ID from name (used by persistent workspaces)
  m_monitorId = 0;
  auto monitors = m_ipc.getSocket1JsonReply("monitors");
  auto currentMonitor = std::ranges::find_if(monitors, [this](const Json::Value &m) {
    return m["name"].asString() == m_bar.output->name;
  });
  if (currentMonitor == monitors.end()) {
    spdlog::error("Monitor '{}' does not have an ID? Using 0", m_bar.output->name);
  } else {
    m_monitorId = (*currentMonitor)["id"].asInt();
    spdlog::trace("Current monitor ID: {}", m_monitorId);
  }
}

void Workspaces::sortSpecialCentered() {
  std::vector<std::unique_ptr<Workspace>> specialWorkspaces;
  std::vector<std::unique_ptr<Workspace>> hiddenWorkspaces;
  std::vector<std::unique_ptr<Workspace>> normalWorkspaces;

  for (auto &workspace : m_workspaces) {
    if (workspace->isSpecial()) {
      specialWorkspaces.push_back(std::move(workspace));
    } else {
      if (workspace->button().is_visible()) {
        normalWorkspaces.push_back(std::move(workspace));
      } else {
        hiddenWorkspaces.push_back(std::move(workspace));
      }
    }
  }
  m_workspaces.clear();

  size_t center = normalWorkspaces.size() / 2;

  m_workspaces.insert(m_workspaces.end(), std::make_move_iterator(normalWorkspaces.begin()),
                      std::make_move_iterator(normalWorkspaces.begin() + center));

  m_workspaces.insert(m_workspaces.end(), std::make_move_iterator(specialWorkspaces.begin()),
                      std::make_move_iterator(specialWorkspaces.end()));

  m_workspaces.insert(m_workspaces.end(),
                      std::make_move_iterator(normalWorkspaces.begin() + center),
                      std::make_move_iterator(normalWorkspaces.end()));

  m_workspaces.insert(m_workspaces.end(), std::make_move_iterator(hiddenWorkspaces.begin()),
                      std::make_move_iterator(hiddenWorkspaces.end()));
}

void Workspaces::sortWorkspaces() {
  std::ranges::sort(  //
      m_workspaces, [&](std::unique_ptr<Workspace> &a, std::unique_ptr<Workspace> &b) {
        // Helper comparisons
        auto isIdLess = a->id() < b->id();
        auto isNameLess = a->name() < b->name();

        switch (m_sortBy) {
          case SortMethod::ID:
            return isIdLess;
          case SortMethod::NAME:
            return isNameLess;
          case SortMethod::NUMBER:
            try {
              return std::stoi(a->name()) < std::stoi(b->name());
            } catch (const std::invalid_argument &) {
              // Handle the exception if necessary.
              break;
            }
          case SortMethod::DEFAULT:
          default:
            // Handle the default case here.
            // normal -> named persistent -> named -> special -> named special

            // both normal (includes numbered persistent) => sort by ID
            if (a->id() > 0 && b->id() > 0) {
              return isIdLess;
            }

            // one normal, one special => normal first
            if ((a->isSpecial()) ^ (b->isSpecial())) {
              return b->isSpecial();
            }

            // only one normal, one named
            if ((a->id() > 0) ^ (b->id() > 0)) {
              return a->id() > 0;
            }

            // both special
            if (a->isSpecial() && b->isSpecial()) {
              // if one is -99 => put it last
              if (a->id() == -99 || b->id() == -99) {
                return b->id() == -99;
              }
              // both are 0 (not yet named persistents) / named specials
              // (-98 <= ID <= -1)
              return isNameLess;
            }

            // sort non-special named workspaces by name (ID <= -1377)
            return isNameLess;
            break;
        }

        // Return a default value if none of the cases match.
        return isNameLess;  // You can adjust this to your specific needs.
      });
  if (m_sortBy == SortMethod::SPECIAL_CENTERED) {
    this->sortSpecialCentered();
  }

  for (size_t i = 0; i < m_workspaces.size(); ++i) {
    m_box.reorder_child(m_workspaces[i]->button(), i);
  }
}

void Workspaces::setUrgentWorkspace(std::string const &windowaddress) {
  const Json::Value clientsJson = m_ipc.getSocket1JsonReply("clients");
  int workspaceId = -1;

  for (Json::Value clientJson : clientsJson) {
    if (clientJson["address"].asString().ends_with(windowaddress)) {
      workspaceId = clientJson["workspace"]["id"].asInt();
      break;
    }
  }

  auto workspace = std::ranges::find_if(m_workspaces, [workspaceId](std::unique_ptr<Workspace> &x) {
    return x->id() == workspaceId;
  });
  if (workspace != m_workspaces.end()) {
    workspace->get()->setUrgent();
  }
}

auto Workspaces::update() -> void {
  doUpdate();
  AModule::update();
}

void Workspaces::updateWindowCount() {
  const Json::Value workspacesJson = m_ipc.getSocket1JsonReply("workspaces");
  for (auto const &workspace : m_workspaces) {
    auto workspaceJson = std::ranges::find_if(workspacesJson, [&](Json::Value const &x) {
      return x["name"].asString() == workspace->name() ||
             (workspace->isSpecial() && x["name"].asString() == "special:" + workspace->name());
    });
    uint32_t count = 0;
    if (workspaceJson != workspacesJson.end()) {
      try {
        count = (*workspaceJson)["windows"].asUInt();
      } catch (const std::exception &e) {
        spdlog::error("Failed to update window count: {}", e.what());
      }
    }
    workspace->setWindows(count);
  }
}

bool Workspaces::updateWindowsToCreate() {
  bool anyWindowCreated = false;
  std::vector<WindowCreationPayload> notCreated;
  for (auto &windowPayload : m_windowsToCreate) {
    bool created = false;
    for (auto &workspace : m_workspaces) {
      if (workspace->onWindowOpened(windowPayload)) {
        created = true;
        anyWindowCreated = true;
        break;
      }
    }
    if (!created) {
      static auto const WINDOW_CREATION_TIMEOUT = 2;
      if (windowPayload.incrementTimeSpentUncreated() < WINDOW_CREATION_TIMEOUT) {
        notCreated.push_back(windowPayload);
      } else {
        registerOrphanWindow(windowPayload);
      }
    }
  }
  m_windowsToCreate.clear();
  m_windowsToCreate = notCreated;
  return anyWindowCreated;
}

void Workspaces::updateWorkspaceStates() {
  const std::vector<int> visibleWorkspaces = getVisibleWorkspaces();
  auto updatedWorkspaces = m_ipc.getSocket1JsonReply("workspaces");

  auto currentWorkspace = m_ipc.getSocket1JsonReply("activeworkspace");
  std::string currentWorkspaceName =
      currentWorkspace.isMember("name") ? currentWorkspace["name"].asString() : "";

  for (auto &workspace : m_workspaces) {
    bool isActiveByName =
        !currentWorkspaceName.empty() && workspace->name() == currentWorkspaceName;

    workspace->setActive(
        workspace->id() == m_activeWorkspaceId || isActiveByName ||
        (workspace->isSpecial() && workspace->name() == m_activeSpecialWorkspaceName));
    if (workspace->isActive() && workspace->isUrgent()) {
      workspace->setUrgent(false);
    }
    workspace->setVisible(std::ranges::find(visibleWorkspaces, workspace->id()) !=
                          visibleWorkspaces.end());
    std::string &workspaceIcon = m_iconsMap[""];
    if (m_withIcon) {
      workspaceIcon = workspace->selectIcon(m_iconsMap);
    }
    auto updatedWorkspace = std::ranges::find_if(updatedWorkspaces, [&workspace](const auto &w) {
      auto wNameRaw = w["name"].asString();
      auto wName = wNameRaw.starts_with("special:") ? wNameRaw.substr(8) : wNameRaw;
      return wName == workspace->name();
    });
    if (updatedWorkspace != updatedWorkspaces.end()) {
      workspace->setOutput((*updatedWorkspace)["monitor"].asString());
    }
    workspace->update(workspaceIcon);
  }
}

int Workspaces::windowRewritePriorityFunction(std::string const &window_rule) {
  // Rules that match against title are prioritized
  // Rules that don't specify if they're matching against either title or class are deprioritized
  bool const hasTitle = window_rule.find("title") != std::string::npos;
  bool const hasClass = window_rule.find("class") != std::string::npos;

  if (hasTitle && hasClass) {
    m_anyWindowRewriteRuleUsesTitle = true;
    return 3;
  }
  if (hasTitle) {
    m_anyWindowRewriteRuleUsesTitle = true;
    return 2;
  }
  if (hasClass) {
    return 1;
  }
  return 0;
}

template <typename... Args>
std::string Workspaces::makePayload(Args const &...args) {
  std::ostringstream result;
  bool first = true;
  ((result << (first ? "" : ",") << args, first = false), ...);
  return result.str();
}

std::pair<std::string, std::string> Workspaces::splitDoublePayload(std::string const &payload) {
  const std::string part1 = payload.substr(0, payload.find(','));
  const std::string part2 = payload.substr(part1.size() + 1);
  return {part1, part2};
}

std::tuple<std::string, std::string, std::string> Workspaces::splitTriplePayload(
    std::string const &payload) {
  const size_t firstComma = payload.find(',');
  const size_t secondComma = payload.find(',', firstComma + 1);

  const std::string part1 = payload.substr(0, firstComma);
  const std::string part2 = payload.substr(firstComma + 1, secondComma - (firstComma + 1));
  const std::string part3 = payload.substr(secondComma + 1);

  return {part1, part2, part3};
}

std::optional<int> Workspaces::parseWorkspaceId(std::string const &workspaceIdStr) {
  try {
    return workspaceIdStr == "special" ? -99 : std::stoi(workspaceIdStr);
  } catch (std::exception const &e) {
    spdlog::debug("Workspace \"{}\" is not bound to an id: {}", workspaceIdStr, e.what());
    return std::nullopt;
  }
}

}  // namespace waybar::modules::hyprland