#include "DataPanelManager.h"
#include "DataPanel.h"
#include "DataPanelFactory.h"
#include "ui/DockWidget.h"
#include "ui/DockTitleBar.h"
#include "ui/MainWindow.h"
#include "workspace/FileEntry.h"
#include "common/SpdLogger.h"

#include <QFileInfo>
#include <QDir>

const QString DataPanelManager::PANEL_OBJECT_NAME_PREFIX = "DataPanel_";

DataPanelManager::DataPanelManager(MainWindow* mainWindow, QObject* parent)
    : QObject(parent)
    , mainWindow_(mainWindow)
    , currentWorkspace_(nullptr)
{
    LOG_INFO("DataPanelManager initialized");
}

DataPanelManager::~DataPanelManager()
{
    ClearAllPanels();
    LOG_INFO("DataPanelManager destroyed");
}

void DataPanelManager::SetWorkspace(WorkSpace* workspace)
{
    if (currentWorkspace_ == workspace) {
        return;
    }

    // Disconnect old workspace signal connections
    if (currentWorkspace_) {
        disconnect(currentWorkspace_, nullptr, this, nullptr);
    }

    currentWorkspace_ = workspace;

    // Connect new workspace signals
    if (currentWorkspace_) {
        connect(currentWorkspace_, &WorkSpace::FilesChanged, this, &DataPanelManager::OnFilesChanged);
    }

    // Update all panel types
    if (currentWorkspace_) {
        UpdatePanelsForType(FileEntryType::Curve);
        UpdatePanelsForType(FileEntryType::Surface);
        UpdatePanelsForType(FileEntryType::Table);
        UpdatePanelsForType(FileEntryType::Light);
    } else {
        ClearAllPanels();
    }
}

int DataPanelManager::GetActivePanelCount(FileEntryType fileType) const
{
    if (static_cast<int>(fileType) == -1) {
        // Return total count
        return dataPanels_.size();
    }

    // Count panels of specific type
    int count = 0;
    for (auto it = dataPanels_.begin(); it != dataPanels_.end(); ++it) {
        if (it.value()->GetFileType() == fileType) {
            count++;
        }
    }
    return count;
}

QList<DataPanel*> DataPanelManager::GetPanelsOfType(FileEntryType fileType) const
{
    QList<DataPanel*> panels;
    for (auto it = dataPanels_.begin(); it != dataPanels_.end(); ++it) {
        if (it.value()->GetFileType() == fileType) {
            panels.append(it.value());
        }
    }
    return panels;
}

void DataPanelManager::OnWorkspaceChanged(WorkSpace* workspace)
{
    SetWorkspace(workspace);
}

void DataPanelManager::OnFilesChanged(FileEntryType type)
{
    // Only respond to supported file types
    if (!DataPanelFactory::IsTypeSupported(type)) {
        return;
    }

    UpdatePanelsForType(type);
}

void DataPanelManager::OnPanelClosed()
{
    DataPanel* panel = qobject_cast<DataPanel*>(sender());
    if (panel) {
        RemovePanel(panel);
    }
}

void DataPanelManager::UpdatePanelsForType(FileEntryType fileType)
{
    if (!currentWorkspace_) {
        ClearPanelsOfType(fileType);
        return;
    }

    // Get files of specified type from current workspace
    std::vector<FileEntry> files = currentWorkspace_->GetFileEntries(fileType);

    // Limit to maximum panels per type
    const int maxPanels = qMin(static_cast<int>(files.size()), GetMaxPanelCount());

    // Find panels to remove (excess panels of this type)
    QStringList keysToRemove;
    for (auto it = dataPanels_.begin(); it != dataPanels_.end(); ++it) {
        DataPanel* panel = it.value();
        if (panel->GetFileType() == fileType && panel->GetIndex() >= maxPanels) {
            keysToRemove.append(it.key());
        }
    }

    // Remove excess panels
    for (const QString& key : keysToRemove) {
        RemovePanel(dataPanels_[key]);
    }

    // Create or update panels
    for (int i = 0; i < maxPanels; ++i) {
        const FileEntry& fileEntry = files[i];
        QString filePath = currentWorkspace_->GetFileEntryAbsPath(fileEntry.type, i);
        QString panelKey = QString("%1_%2").arg(FileEntryTypeToString(fileType)).arg(i);

        if (dataPanels_.contains(panelKey)) {
            // Check if file path has changed
            DataPanel* existingPanel = dataPanels_[panelKey];
            if (existingPanel->GetFilePath() != filePath) {
                // File path changed, recreate panel
                RemovePanel(existingPanel);
                CreateDataPanel(fileType, filePath);
            } else {
                // File path unchanged, refresh data
                existingPanel->RefreshPanel();
            }
        } else {
            // Create new panel
            CreateDataPanel(fileType, filePath);
        }
    }
}

DataPanel* DataPanelManager::CreateDataPanel(FileEntryType fileType, const QString& filePath)
{
    if (GetActivePanelCount(fileType) >= GetMaxPanelCount()) {
        LOG_WARN("Cannot create more {} panels, maximum count reached: {}", 
                 FileEntryTypeToString(fileType), GetMaxPanelCount());
        return nullptr;
    }

    // Find next available index for this file type
    int index = FindNextAvailableIndex(fileType);
    QString panelKey = QString("%1_%2").arg(FileEntryTypeToString(fileType)).arg(index);

    // Create dock widget
    DockWidget* dockWidget = new DockWidget(mainWindow_);
    dockWidget->setObjectName(GeneratePanelObjectName(fileType, index));

    // Set title bar
    DockTitleBar* titleBar = new DockTitleBar(dockWidget);
    dockWidget->SetDockWidgetTitleBar(titleBar);

    // Connect signals
    connect(dockWidget, &DockWidget::dockLocationChanged, this, [this](Qt::DockWidgetArea area) {
        // Handle dock location changes if needed
    });

    // Add to main window
    mainWindow_->addDockWidget(Qt::RightDockWidgetArea, dockWidget);

    // Create panel using factory
    DataPanel* panel = DataPanelFactory::CreatePanel(fileType, index, filePath, dockWidget);
    if (!panel) {
        LOG_ERROR("Failed to create panel for type: {}", FileEntryTypeToString(fileType));
        dockWidget->deleteLater();
        return nullptr;
    }

	panel->InitUI();

    dockWidget->setWidget(panel);

    // Set panel's dock widget reference
    panel->SetDockWidget(dockWidget);

    // Connect panel signals
    connect(panel, &DataPanel::PanelClosed, this, &DataPanelManager::OnPanelClosed);

    // Save references
    dataPanels_[panelKey] = panel;
    dockWidgets_[panelKey] = dockWidget;

    LOG_INFO("Created {} panel {} for file: {}", 
             FileEntryTypeToString(fileType), index, filePath.toStdString());
    return panel;
}

void DataPanelManager::RemovePanel(DataPanel* panel)
{
    if (!panel) {
        return;
    }

    // Find panel key
    QString panelKey;
    for (auto it = dataPanels_.begin(); it != dataPanels_.end(); ++it) {
        if (it.value() == panel) {
            panelKey = it.key();
            break;
        }
    }

    if (panelKey.isEmpty()) {
        return;
    }

    // Remove dock widget
    if (dockWidgets_.contains(panelKey)) {
        DockWidget* dockWidget = dockWidgets_[panelKey];
        mainWindow_->removeDockWidget(dockWidget);
        dockWidget->deleteLater();
    }

    // Remove from mappings
    dataPanels_.remove(panelKey);
    dockWidgets_.remove(panelKey);

    // Delete panel
    panel->deleteLater();

    LOG_INFO("Removed {} panel {}", 
             FileEntryTypeToString(panel->GetFileType()), panel->GetIndex());
}

void DataPanelManager::ClearAllPanels()
{
    // Get copy of all keys
    QStringList keys = dataPanels_.keys();

    // Remove panels one by one
    for (const QString& key : keys) {
        RemovePanel(dataPanels_[key]);
    }

    LOG_INFO("Cleared all data panels");
}

void DataPanelManager::ClearPanelsOfType(FileEntryType fileType)
{
    QStringList keysToRemove;
    for (auto it = dataPanels_.begin(); it != dataPanels_.end(); ++it) {
        if (it.value()->GetFileType() == fileType) {
            keysToRemove.append(it.key());
        }
    }

    for (const QString& key : keysToRemove) {
        RemovePanel(dataPanels_[key]);
    }

    LOG_INFO("Cleared all {} panels", FileEntryTypeToString(fileType));
}

QString DataPanelManager::GeneratePanelObjectName(FileEntryType fileType, int index) const
{
    return QString("%1%2_%3").arg(PANEL_OBJECT_NAME_PREFIX)
                             .arg(FileEntryTypeToString(fileType))
                             .arg(index);
}

int DataPanelManager::FindNextAvailableIndex(FileEntryType fileType) const
{
    int index = 0;
    QString baseKey = QString("%1_").arg(FileEntryTypeToString(fileType));
    
    while (dataPanels_.contains(baseKey + QString::number(index))) {
        index++;
    }
    
    return index;
}