#include "faulttable.h"
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QTableWidget>
#include <QHeaderView>
#include <QLabel>
#include <QPushButton>
#include "global.h"

FaultTable::FaultTable(QWidget* parent)
    : QWidget(parent)
{
    QVBoxLayout* lay = new QVBoxLayout(this);
    lay->setContentsMargins(0, 0, 0, 0);
    lay->setSpacing(10);

    // 分页行（上一页 / 页码 / 下一页）
    QHBoxLayout* nav = new QHBoxLayout();
    nav->addStretch(1);

    m_prev = new QPushButton("上一页", this);
    m_prev->setFixedSize(160, 64);
    connect(m_prev, &QPushButton::clicked, this, [this]() {
        if (m_page > 0) { setPage(m_page - 1); emit pageChanged(m_page); }
    });

    m_pageLabel = new QLabel("1/1", this);
    m_pageLabel->setAlignment(Qt::AlignCenter);
    m_pageLabel->setStyleSheet(QString("color:%1;font-size:22px;").arg(C::TEXT));
    m_pageLabel->setFixedWidth(140);

    m_next = new QPushButton("下一页", this);
    m_next->setFixedSize(160, 64);
    connect(m_next, &QPushButton::clicked, this, [this]() {
        if (m_page < pageCount() - 1) { setPage(m_page + 1); emit pageChanged(m_page); }
    });

    nav->addWidget(m_prev);
    nav->addWidget(m_pageLabel);
    nav->addWidget(m_next);
    lay->addLayout(nav);

    // 表格
    m_table = new QTableWidget(this);
    m_table->setColumnCount(3);
    m_table->setHorizontalHeaderLabels(QStringList() << "序号" << "故障时间" << "故障名称");
    m_table->setEditTriggers(QAbstractItemView::NoEditTriggers);
    m_table->setSelectionBehavior(QAbstractItemView::SelectRows);
    m_table->setSelectionMode(QAbstractItemView::SingleSelection);
    m_table->verticalHeader()->setVisible(false);
    m_table->setAlternatingRowColors(true);
    m_table->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
    m_table->horizontalHeader()->setSectionResizeMode(0, QHeaderView::Fixed);
    m_table->setColumnWidth(0, 120);
    m_table->horizontalHeader()->setSectionResizeMode(2, QHeaderView::Stretch);
    m_table->verticalHeader()->setDefaultSectionSize(100);
    m_table->verticalHeader()->setSectionResizeMode(QHeaderView::Fixed);
    connect(m_table, &QTableWidget::cellClicked, this, [this](int row, int) {
        int global = m_page * m_pageSize + row;
        if (global >= 0 && global < m_data.size())
            emit rowClicked(global);
    });
    lay->addWidget(m_table, 1);

    refresh();
}

void FaultTable::setData(const QVector<FaultRecord>& data)
{
    m_data = data;
    if (m_page >= pageCount() && pageCount() > 0)
        m_page = pageCount() - 1;
    refresh();
}

void FaultTable::setPage(int p)
{
    m_page = qBound(0, p, qMax(0, pageCount() - 1));
    refresh();
}

int FaultTable::pageCount() const
{
    if (m_data.isEmpty()) return 1;
    return (m_data.size() + m_pageSize - 1) / m_pageSize;
}

void FaultTable::refresh()
{
    m_table->setRowCount(0);
    m_table->setRowCount(m_pageSize);

    int start = m_page * m_pageSize;
    for (int r = 0; r < m_pageSize; ++r) {
        int idx = start + r;
        bool has = idx < m_data.size();
        for (int c = 0; c < 3; ++c) {
            QTableWidgetItem* it = new QTableWidgetItem();
            it->setTextAlignment(Qt::AlignCenter);
            if (has) {
                const FaultRecord& rec = m_data[idx];
                if (c == 0) it->setText(QString::number(idx + 1));
                else if (c == 1) it->setText(rec.time);
                else it->setText(rec.desc);
            }
            m_table->setItem(r, c, it);
        }
    }

    // 空数据显示提示
    if (m_data.isEmpty()) {
        m_table->clearSelection();
    }

    m_pageLabel->setText(QString("%1/%2").arg(m_page + 1).arg(pageCount()));
    m_prev->setEnabled(m_page > 0);
    m_next->setEnabled(m_page < pageCount() - 1);
}