#include "faultquery.h"
#include "faulttable.h"
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>
#include <QTimer>
#include "confirmdialog.h"
#include "global.h"

FaultQueryPage::FaultQueryPage(AppContext* ctx, QWidget* parent)
    : BasePage(ctx, parent)
{
    m_categories << "机器人底盘" << "机械臂" << "洗消系统" << "气体检测仪";

    QVBoxLayout* root = new QVBoxLayout(this);
    root->setContentsMargins(20, 20, 20, 20);
    root->setSpacing(30);

    // 顶条：标题 + 汇总数
    m_title = label("历史故障", 50, C::TEXT, true, this);
    root->addWidget(m_title);

    QHBoxLayout* main = new QHBoxLayout();
    main->setSpacing(30);

    // 表格
    m_table = new FaultTable(this);
    connect(m_table, &FaultTable::rowClicked, this, &FaultQueryPage::onRowClicked);
    main->addWidget(m_table, 1);

    // 分类按钮列（左右各留 20px，按钮间距 40px，剩余高度由按钮等分）
    QWidget* right = new QWidget(this);
    QVBoxLayout* rightLay = new QVBoxLayout(right);
    rightLay->setContentsMargins(80, FaultTable::kHeaderHeight + 10, 30, 80);   // 对齐表格内容区后再下移 10px
    rightLay->setSpacing(60);                     // 按钮之间的间隔 
    for (const QString& cat : m_categories) {
        QPushButton* b = button(cat + "故障", "", right);
        b->setCheckable(true);
        b->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Expanding);   // 纵向可拉伸 → 等分剩余空间
        b->setStyleSheet(QString(
                             "QPushButton{font-size:32px;background-color:%1;color:%2;border:1px solid %3;border-radius:12px;}"
                             "QPushButton:hover,QPushButton:focus,QPushButton:checked"
                             "{background-color:%4;color:#FFFFFF;border:2px solid #8ABFFF;}")
                             .arg(C::PANEL_HI, C::TEXT, C::BORDER, C::PRIMARY));
        connect(b, &QPushButton::toggled, this, &FaultQueryPage::onCategoryToggled);
        m_categoryButtons << b;
        rightLay->addWidget(b, 1);
    }
    right->setFixedWidth(360);
    main->addWidget(right);

    root->addLayout(main, 1);

    // 底部：返回（预留更大的行高空间）
    QHBoxLayout* bottomLay = new QHBoxLayout();
    bottomLay->setContentsMargins(0, 0, 40, 30);
    bottomLay->addStretch(1);
    m_back = button("返回", "", this);
    m_back->setFixedSize(250, 100);
    m_back->setStyleSheet(cancelButtonStyle(60));   // 选中（悬停/按下/焦点）红底白字
    connect(m_back, &QPushButton::clicked, this, [this]() { emit navigate(m_returnPage); });
    bottomLay->addWidget(m_back);
    root->addLayout(bottomLay);

    // Tab 顺序（循环）：表格 → 右侧分类按钮 → 返回 → 上一页 → 下一页 → 回到表格
    QWidget* first = m_table->view();
    QWidget* last = first;
    for (QPushButton* b : m_categoryButtons) {
        QWidget::setTabOrder(last, b);
        last = b;
    }
    QWidget::setTabOrder(last, m_back);
    QWidget::setTabOrder(m_back, m_table->prevButton());
    QWidget::setTabOrder(m_table->prevButton(), m_table->nextButton());
    QWidget::setTabOrder(m_table->nextButton(), first);   // 回到表格，完成循环

    refresh();
}

void FaultQueryPage::showEvent(QShowEvent* ev)
{
    BasePage::showEvent(ev);
    // 进入页面默认聚焦“分页”（上一页优先；首页禁用时退回下一页，再退回表格）
    QTimer::singleShot(0, this, [this]() {
        QWidget* prev = m_table->prevButton();
        QWidget* next = m_table->nextButton();
        if (prev->isEnabled())      prev->setFocus();
        else if (next->isEnabled()) next->setFocus();
        else                        m_table->view()->setFocus();
    });
}

void FaultQueryPage::onCategoryToggled(bool on)
{
    // 单选：选中一个分类时，取消其它分类（屏蔽信号，避免它们再触发本函数）
    QPushButton* src = qobject_cast<QPushButton*>(sender());
    if (on && src) {
        for (QPushButton* b : m_categoryButtons) {
            if (b != src && b->isChecked()) {
                b->blockSignals(true);
                b->setChecked(false);
                b->blockSignals(false);
            }
        }
    }

    // 确定当前选中的分类（都没选 = 显示全部）
    QString selected;
    for (int i = 0; i < m_categoryButtons.size(); ++i) {
        if (m_categoryButtons[i]->isChecked()) {
            selected = m_categories[i];
            break;
        }
    }
    m_filter = selected;
    refresh();
}

void FaultQueryPage::refresh()
{
    // 按分类过滤
    QVector<FaultRecord> data;
    for (const FaultRecord& r : ctx()->faultHistory) {
        if (m_filter.isEmpty() || r.system == m_filter)
            data.append(r);
    }

    m_table->setData(data);

    if (m_filter.isEmpty())
        m_title->setText(QString("历史故障（共 %1 条）").arg(data.size()));
    else
        m_title->setText(QString("%1历史故障（共 %2 条）").arg(m_filter).arg(data.size()));
}

void FaultQueryPage::onRowClicked(int globalIndex)
{
    // 找到当前过滤后列表中的记录
    QVector<FaultRecord> data;
    for (const FaultRecord& r : ctx()->faultHistory) {
        if (m_filter.isEmpty() || r.system == m_filter)
            data.append(r);
    }
    if (globalIndex < 0 || globalIndex >= data.size())
        return;
    const FaultRecord& r = data[globalIndex];
    ConfirmDialog::message(this, "故障详情",
        QString("故障时间：%1\n分系统：%2\n故障代码：%3\n故障描述：%4")
            .arg(r.time, r.system, r.code, r.desc));
}