wino-mail-dtkqt/src/ui/maillistview.cpp

#include "ui/maillistview.h"
#include <QDateTime>
#include "ui/models/EmailListModel.h"
#include "ui/models/EmailTreeModel.h"
#include <QSortFilterProxyModel>
#include <QVBoxLayout>
#include <QPushButton>
#include <QLabel>
#include <QLineEdit>
#include <QCheckBox>
#include <QHBoxLayout>
#include <QComboBox>
#include <QHeaderView>
#include <QResizeEvent>
#include <QListView>
#include <QStyledItemDelegate>
#include <QScrollBar>
#include "ui/delegates/CompactMailDelegate.h"

MailListView::MailListView(QWidget *parent) : QWidget(parent), m_sourceModel(nullptr)
{
    setupUI();
}

void MailListView::setupUI()
{
    QVBoxLayout *layout = new QVBoxLayout(this);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->setSpacing(0);

    // Search bar
    QWidget *searchBar = new QWidget();
    searchBar->setFixedHeight(44);
    searchBar->setStyleSheet("background-color: #f5f5f7; border-bottom: 1px solid #d1d1d6;");
    QHBoxLayout *searchLayout = new QHBoxLayout(searchBar);
    searchLayout->setContentsMargins(12, 4, 12, 4);
    searchLayout->setSpacing(8);

    m_searchEdit = new QLineEdit();
    m_searchEdit->setPlaceholderText("Buscar correos…");
    m_searchEdit->setClearButtonEnabled(true);
    m_searchEdit->setStyleSheet(
        "QLineEdit { background: white; border: 1px solid #d1d1d6; border-radius: 6px; "
        "padding: 6px 12px; font-size: 13px; color: #1d1d1f; }"
        "QLineEdit:focus { border: 2px solid #0071e3; }"
    );
    searchLayout->addWidget(m_searchEdit);
    connect(m_searchEdit, &QLineEdit::textChanged, this, &MailListView::onSearchTextChanged);

    layout->addWidget(searchBar);

    // Filter bar
    QWidget *filterBar = new QWidget();
    filterBar->setFixedHeight(36);
    filterBar->setStyleSheet("background-color: #f5f5f7; border-bottom: 1px solid #d1d1d6;");
    QHBoxLayout *filterLayout = new QHBoxLayout(filterBar);
    filterLayout->setContentsMargins(12, 2, 12, 2);
    filterLayout->setSpacing(12);

    m_unreadOnlyCheck = new QCheckBox("No leídos");
    m_unreadOnlyCheck->setStyleSheet("QCheckBox { font-size: 12px; color: #333; }");
    filterLayout->addWidget(m_unreadOnlyCheck);

    m_flaggedOnlyCheck = new QCheckBox("Marcados");
    m_flaggedOnlyCheck->setStyleSheet("QCheckBox { font-size: 12px; color: #333; }");
    filterLayout->addWidget(m_flaggedOnlyCheck);

    m_hasAttachmentsCheck = new QCheckBox("Con adjuntos");
    m_hasAttachmentsCheck->setStyleSheet("QCheckBox { font-size: 12px; color: #333; }");
    filterLayout->addWidget(m_hasAttachmentsCheck);

    m_pinnedOnlyCheck = new QCheckBox("Solo fijados");
    m_pinnedOnlyCheck->setStyleSheet("QCheckBox { font-size: 12px; color: #333; }");
    filterLayout->addWidget(m_pinnedOnlyCheck);

    filterLayout->addStretch();

    // Display mode combo (Compact/Medium/Spacious)
    m_displayModeCombo = new QComboBox();
    m_displayModeCombo->addItem("Compacto");
    m_displayModeCombo->addItem("Medio");
    m_displayModeCombo->addItem("Espacioso");
    m_displayModeCombo->setFixedWidth(120);
    m_displayModeCombo->setStyleSheet(
        "QComboBox { border: 1px solid #d1d1d6; border-radius: 4px; padding: 4px 8px; "
        "background: white; min-height: 20px; }"
        "QComboBox:hover { border-color: #bdbdbd; }"
        "QComboBox:focus { border-color: #1976D2; }"
    );
    connect(m_displayModeCombo, QOverload<int>::of(&QComboBox::currentIndexChanged),
            this, &MailListView::onDisplayModeChanged);
    filterLayout->addWidget(m_displayModeCombo);

    // Group by combo
    m_groupByCombo = new QComboBox();
    m_groupByCombo->addItem("Sin agrupación");
    m_groupByCombo->addItem("Agrupar por fecha");
    m_groupByCombo->addItem("Agrupar por conversación");
    m_groupByCombo->addItem("Agrupar por remitente");
    m_groupByCombo->setFixedWidth(180);
    m_groupByCombo->setStyleSheet(
        "QComboBox { border: 1px solid #d1d1d6; border-radius: 4px; padding: 4px 8px; "
        "background: white; min-height: 20px; }"
        "QComboBox:hover { border-color: #bdbdbd; }"
        "QComboBox:focus { border-color: #1976D2; }"
    );
    connect(m_groupByCombo, QOverload<int>::of(&QComboBox::currentIndexChanged),
            this, &MailListView::onGroupByChanged);
    filterLayout->addWidget(m_groupByCombo);

    layout->addWidget(filterBar);

    // View Stack (TreeView for normal, ListView for compact)
    m_viewStack = new QStackedWidget();
    layout->addWidget(m_viewStack, 1);

    // --- Normal Tree View ---
    m_treeView = new QTreeView();
    m_treeView->setSelectionBehavior(QAbstractItemView::SelectRows);
    m_treeView->setSelectionMode(QAbstractItemView::SingleSelection);
    m_treeView->setAlternatingRowColors(true);
    m_treeView->header()->setStretchLastSection(false);
    m_treeView->header()->setSectionsClickable(true);
    m_treeView->setSortingEnabled(false);
    m_treeView->setFrameShape(QFrame::NoFrame);
    m_treeView->setRootIsDecorated(true);
    m_treeView->setItemsExpandable(true);
    m_treeView->setUniformRowHeights(true);
    m_treeView->setStyleSheet(
        "QTreeView { background-color: #ffffff; alternate-background-color: #f9f9fb; border: none; }"
        "QTreeView::item { padding: 8px; border-bottom: 1px solid #e8e8ed; }"
        "QTreeView::item:selected { background-color: #e3f2fd; color: #1a1a2e; }"
        "QTreeView::branch { background: transparent; }"
        "QHeaderView::section { background-color: #f5f5f7; padding: 8px; border: none; border-bottom: 1px solid #d1d1d6; font-weight: 600; color: #555; }"
    );

    m_treeModel = new EmailTreeModel(this);
    m_proxyModel = new QSortFilterProxyModel(this);
    m_proxyModel->setSourceModel(m_treeModel);
    m_proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
    m_proxyModel->setFilterKeyColumn(-1);

    m_treeView->setModel(m_proxyModel);

    m_treeView->header()->setSectionResizeMode(EmailTreeModel::ColSubject, QHeaderView::Stretch);
    m_treeView->header()->setSectionResizeMode(EmailTreeModel::ColSender, QHeaderView::Stretch);
    m_treeView->header()->setSectionResizeMode(EmailTreeModel::ColDate, QHeaderView::ResizeToContents);

    connect(m_treeView, &QTreeView::clicked, this, &MailListView::onRowSelected);
    connect(m_treeView, &QTreeView::doubleClicked, this, [this](const QModelIndex &index) {
        if (!index.isValid()) return;
        QModelIndex proxyIdx = m_proxyModel->mapToSource(index);
        
        // Check if it's a thread node - toggle expansion
        if (proxyIdx.isValid() && proxyIdx.data(EmailTreeModel::IsThreadRole).toBool()) {
            QString threadId = proxyIdx.data(EmailTreeModel::ThreadIdRole).toString();
            if (!threadId.isEmpty()) {
                bool expanded = proxyIdx.data(EmailTreeModel::IsThreadExpandedRole).toBool();
                m_treeModel->setThreadExpanded(threadId, !expanded);
                return;
            }
        }
        
        // Otherwise open mail
        if (proxyIdx.isValid() && proxyIdx.data(EmailTreeModel::MailIdRole).isValid()) {
            int mailId = proxyIdx.data(EmailTreeModel::MailIdRole).toInt();
            emit emailOpenRequested(mailId);
        }
    });

    m_treeView->expandAll();

    // --- Compact List View ---
    m_listView = new QListView();
    m_listView->setSelectionMode(QAbstractItemView::SingleSelection);
    m_listView->setUniformItemSizes(true);
    m_listView->setFrameShape(QFrame::NoFrame);
    m_listView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    m_listView->setStyleSheet(
        "QListView { background-color: #ffffff; border: none; outline: none; }"
        "QListView::item { border: none; }"
        "QListView::item:selected { background: transparent; }"
        "QListView::item:hover { background: transparent; }"
    );

    m_compactDelegate = new CompactMailDelegate(this);
    m_listView->setItemDelegate(m_compactDelegate);

    // Connect compact delegate signals
    connect(m_compactDelegate, &CompactMailDelegate::flagRequested,
            this, &MailListView::onCompactFlagRequested);
    connect(m_compactDelegate, &CompactMailDelegate::deleteRequested,
            this, &MailListView::onCompactDeleteRequested);
    connect(m_compactDelegate, &CompactMailDelegate::categoryRequested,
            this, &MailListView::onCompactCategoryRequested);
    connect(m_compactDelegate, &CompactMailDelegate::moreRequested,
            this, &MailListView::onCompactMoreRequested);
    connect(m_compactDelegate, &CompactMailDelegate::mailClicked,
            this, &MailListView::onCompactMailClicked);

    // Same proxy model for list view (single column)
    m_listView->setModel(m_proxyModel);
    m_listView->setModelColumn(0); // Use first column (subject)

    // Add both views to stack
    m_viewStack->addWidget(m_treeView);  // index 0 = normal
    m_viewStack->addWidget(m_listView);  // index 1 = compact

    // Show normal by default
    m_viewStack->setCurrentIndex(0);

    // Connect filter checkboxes
    connect(m_unreadOnlyCheck, &QCheckBox::toggled, this, &MailListView::onFilterChanged);
    connect(m_flaggedOnlyCheck, &QCheckBox::toggled, this, &MailListView::onFilterChanged);
    connect(m_hasAttachmentsCheck, &QCheckBox::toggled, this, &MailListView::onFilterChanged);
    connect(m_pinnedOnlyCheck, &QCheckBox::toggled, this, &MailListView::onFilterChanged);
}

void MailListView::setModel(EmailListModel *model)
{
    m_sourceModel = model;

    // Connect to source model changes to refresh both views
    connect(m_sourceModel, &QAbstractItemModel::modelReset, this, &MailListView::refreshViews);
    connect(m_sourceModel, &QAbstractItemModel::layoutChanged, this, &MailListView::refreshViews);
    connect(m_sourceModel, &QAbstractItemModel::rowsInserted, this, &MailListView::onRowsInserted);
    connect(m_sourceModel, &QAbstractItemModel::rowsRemoved, this, &MailListView::refreshViews);
    connect(m_sourceModel, &EmailListModel::totalCountChanged, this, &MailListView::onTotalCountChanged);

    // Connect tree view scroll for fetchMore
    connect(m_treeView->verticalScrollBar(), &QScrollBar::valueChanged, this, &MailListView::onTreeViewScrolled);
    connect(m_listView->verticalScrollBar(), &QScrollBar::valueChanged, this, &MailListView::onListViewScrolled);

    // Initial population
    refreshViews();
}

void MailListView::refreshViews()
{
    if (!m_sourceModel) return;

    // For paginated model, just update the tree model with currently loaded emails
    const QVector<MailItem> &emails = m_sourceModel->emails();
    m_treeModel->setEmails(emails);
    m_treeView->expandAll();

    // List view uses same proxy model, just refresh
    m_listView->update();
}

void MailListView::resizeEvent(QResizeEvent *event)
{
    QWidget::resizeEvent(event);
    updateViewMode();
}

void MailListView::updateViewMode()
{
    int viewportWidth = m_viewStack->width(); // available width
    bool wantCompact = (viewportWidth < m_compactThreshold);

    if (wantCompact != m_compactMode) {
        m_compactMode = wantCompact;
        m_viewStack->setCurrentIndex(m_compactMode ? 1 : 0);

        if (m_compactMode) {
            m_treeView->header()->hide();
        } else {
            m_treeView->header()->show();
        }
    }
}

void MailListView::onRowSelected(const QModelIndex &index)
{
    if (!index.isValid()) return;
    QModelIndex proxyIdx = m_proxyModel->mapToSource(index);
    if (proxyIdx.isValid() && proxyIdx.data(EmailTreeModel::MailIdRole).isValid()) {
        int mailId = proxyIdx.data(EmailTreeModel::MailIdRole).toInt();
        emit emailSelected(mailId);
    }
}

void MailListView::onSearchTextChanged(const QString &text)
{
    m_proxyModel->setFilterFixedString(text);
}

void MailListView::onFilterChanged()
{
    if (!m_sourceModel) return;
    m_sourceModel->setShowUnreadOnly(m_unreadOnlyCheck->isChecked());
    m_sourceModel->setShowFlaggedOnly(m_flaggedOnlyCheck->isChecked());
    m_sourceModel->setShowHasAttachments(m_hasAttachmentsCheck->isChecked());
    m_sourceModel->setShowPinnedOnly(m_pinnedOnlyCheck->isChecked());
}

void MailListView::onGroupByChanged(int index)
{
    switch (index) {
    case 0: // Sin agrupación
        m_treeModel->setGroupMode(EmailTreeModel::NoGrouping);
        break;
    case 1: // Agrupar por fecha
        m_treeModel->setGroupMode(EmailTreeModel::GroupByDate);
        break;
    case 2: // Agrupar por conversación/hilo
        m_treeModel->setGroupMode(EmailTreeModel::GroupByThread);
        break;
    case 3: // Agrupar por remitente
        m_treeModel->setGroupMode(EmailTreeModel::GroupBySender);
        break;
    }
    m_treeView->expandAll();
}

void MailListView::onCompactFlagRequested(int mailId)
{
    emit flagRequested(mailId);
}

void MailListView::onCompactDeleteRequested(int mailId)
{
    emit deleteRequested(mailId);
}

void MailListView::onCompactCategoryRequested(int mailId)
{
    emit categoryRequested(mailId);
}

void MailListView::onCompactMoreRequested(int mailId, const QPoint &globalPos)
{
    emit moreRequested(mailId, globalPos);
}

void MailListView::onCompactMailClicked(int mailId)
{
    emit emailSelected(mailId);
}

void MailListView::onCompactReplyRequested(int mailId)
{
    emit replyRequested(mailId);
}

void MailListView::onCompactForwardRequested(int mailId)
{
    emit forwardRequested(mailId);
}

void MailListView::onCompactMarkUnreadRequested(int mailId)
{
    emit markUnreadRequested(mailId);
}

void MailListView::onDisplayModeChanged(int index)
{
    CompactMailDelegate::DisplayMode mode = static_cast<CompactMailDelegate::DisplayMode>(index);
    m_compactDelegate->setDisplayMode(mode);
    m_listView->update();
}

void MailListView::onTotalCountChanged(int count)
{
    Q_UNUSED(count);
    // Could update a status label showing "X of Y emails"
}

void MailListView::onTreeViewScrolled(int value)
{
    if (!m_sourceModel) return;
    QScrollBar* scrollBar = m_treeView->verticalScrollBar();
    int maxValue = scrollBar->maximum();
    if (maxValue > 0 && value >= maxValue * 0.9) { // 90% threshold
        m_sourceModel->fetchMore(QModelIndex());
    }
}

void MailListView::onListViewScrolled(int value)
{
    if (!m_sourceModel) return;
    QScrollBar* scrollBar = m_listView->verticalScrollBar();
    int maxValue = scrollBar->maximum();
    if (maxValue > 0 && value >= maxValue * 0.9) { // 90% threshold
        m_sourceModel->fetchMore(QModelIndex());
    }
}

void MailListView::onRowsInserted(const QModelIndex &parent, int first, int last)
{
    Q_UNUSED(parent);
    Q_UNUSED(first);
    Q_UNUSED(last);
    // New emails loaded via fetchMore - refresh tree model
    if (m_sourceModel) {
        const QVector<MailItem> &emails = m_sourceModel->emails();
        m_treeModel->setEmails(emails);
        m_treeView->expandAll();
    }
}