#include "panels/chart/GridDataChartView.hpp"

#include <QCheckBox>
#include <QHBoxLayout>
#include <QLabel>
#include <QSlider>
#include <QToolButton>
#include <QVBoxLayout>

#include <qwt_plot.h>
#include <qwt_plot_grid.h>
#include <QSplitter>
#include <QScrollArea>
#include <QFrame>
#include <qwt_plot_rescaler.h>

#include "PanelHeader.hpp"
#include "panels/AnomalyTablePanel.hpp"
#include "panels/DescriptionPanel.hpp"
#include "panels/chart/ColorBarWidget.hpp"
#include "panels/chart/ColorMapService.hpp"
#include "panels/chart/ContourPlotItem.hpp"
#include "panels/chart/LivePanner.hpp"

namespace geopro::app {

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

    // ---- 工具条 ----
    auto* toolbar = new QWidget(this);
    auto* tbLay = new QHBoxLayout(toolbar);
    tbLay->setContentsMargins(4, 4, 4, 4);
    tbLay->setSpacing(4);

    auto* btnGrid = new QToolButton(toolbar);
    btnGrid->setText(QStringLiteral("网格"));

    auto* btnColorScale = new QToolButton(toolbar);
    btnColorScale->setText(QStringLiteral("色阶配置"));

    auto* btnWhiten = new QToolButton(toolbar);
    btnWhiten->setText(QStringLiteral("白化"));

    auto* btnFilter = new QToolButton(toolbar);
    btnFilter->setText(QStringLiteral("滤波处理"));

    auto* chkShowAnom = new QCheckBox(QStringLiteral("显示异常"), toolbar);
    chkShowAnom->setChecked(true);

    auto* chkShowContourLabel = new QCheckBox(QStringLiteral("显示等值线标注"), toolbar);
    chkShowContourLabel->setChecked(true);

    auto* chkContourTip = new QCheckBox(QStringLiteral("显示等值线提示信息"), toolbar);
    chkContourTip->setChecked(false);

    auto* lblSimplify = new QLabel(QStringLiteral("简化容差:"), toolbar);

    simplifySlider_ = new QSlider(Qt::Horizontal, toolbar);
    simplifySlider_->setRange(0, 100);
    simplifySlider_->setValue(50);
    simplifySlider_->setFixedWidth(80);

    simplifyValueLabel_ = new QLabel(QStringLiteral("0.5"), toolbar);
    simplifyValueLabel_->setFixedWidth(28);

    connect(simplifySlider_, &QSlider::valueChanged, this, [this](int v) {
        simplifyValueLabel_->setText(QString::number(v / 100.0, 'f', 1));
    });

    auto* btnAnomalyLabel = new QToolButton(toolbar);
    btnAnomalyLabel->setText(QStringLiteral("异常标注"));

    auto* btnAutoLabel = new QToolButton(toolbar);
    btnAutoLabel->setText(QStringLiteral("自动标注"));

    auto* btnSaveAs = new QToolButton(toolbar);
    btnSaveAs->setText(QStringLiteral("另存为"));

    tbLay->addWidget(btnGrid);
    tbLay->addWidget(btnColorScale);
    tbLay->addWidget(btnWhiten);
    tbLay->addWidget(btnFilter);
    tbLay->addWidget(chkShowAnom);
    tbLay->addWidget(chkShowContourLabel);
    tbLay->addWidget(chkContourTip);
    tbLay->addWidget(lblSimplify);
    tbLay->addWidget(simplifySlider_);
    tbLay->addWidget(simplifyValueLabel_);
    tbLay->addWidget(btnAnomalyLabel);
    tbLay->addWidget(btnAutoLabel);
    tbLay->addWidget(btnSaveAs);
    tbLay->addStretch();

    lay->addWidget(toolbar);

    // ---- QwtPlot（仿 RawDataChartView，差异：x 轴在底部、不画过原点零线、网格线被填充覆盖故省）----
    plot_ = new QwtPlot(this);
    plot_->setObjectName(QStringLiteral("gridPlotArea"));
    plot_->enableAxis(QwtPlot::xBottom, true);
    plot_->enableAxis(QwtPlot::xTop, false);
    plot_->enableAxis(QwtPlot::yLeft, true);

    // 白底浅色（对齐原版 web 图表）。
    plot_->setCanvasBackground(QBrush(Qt::white));
    plot_->setAutoFillBackground(true);
    {
        QPalette pal = plot_->palette();
        pal.setColor(QPalette::Window, Qt::white);
        pal.setColor(QPalette::WindowText, QColor(90, 90, 90));
        pal.setColor(QPalette::Text, QColor(90, 90, 90));
        plot_->setPalette(pal);
    }

    // 交互：LivePanner 统一左键实时平移 + 滚轮缩放（消费滚轮事件，不冒泡触发滚动条）。
    new LivePanner(plot_, QwtPlot::xBottom, QwtPlot::yLeft, this);

    plot_->setMinimumSize(0, 0);

    // 锁定 x:y 真实比尺（参考轴 xBottom，Expanding）。
    rescaler_ = new QwtPlotRescaler(plot_->canvas(), QwtPlot::xBottom, QwtPlotRescaler::Expanding);
    rescaler_->setAspectRatio(1.0);
    rescaler_->setEnabled(true);

    // 图表区 = 绘图 + 色阶条（色阶条固定高 36）。
    colorBar_ = new ColorBarWidget(this);
    colorBar_->setObjectName(QStringLiteral("gridColorScaleBar"));
    auto* chartArea = new QWidget(this);
    auto* chartLay = new QVBoxLayout(chartArea);
    chartLay->setContentsMargins(0, 0, 0, 0);
    chartLay->setSpacing(0);
    chartLay->addWidget(plot_, 1);
    chartLay->addWidget(colorBar_);

    // ---- 底部双页签（异常列表 / 描述）----
    anomalyTable_ = new AnomalyTablePanel(this);
    descriptionPanel_ = new DescriptionPanel(this);
    const QVector<PanelTab> bottomTabs = {
        {Glyph::Anomaly,  QStringLiteral("异常列表"), anomalyTable_,    true},
        {Glyph::Property, QStringLiteral("描述"),     descriptionPanel_, false},
    };
    auto tabbedBottom = buildTabbedPanel(bottomTabs, {});

    // 图表区 | 底部表 竖直 QSplitter（可拖拽调整比例）。给定最小高度→分割器有最小尺寸。
    chartArea->setMinimumHeight(280);
    tabbedBottom.container->setMinimumHeight(160);
    auto* splitter = new QSplitter(Qt::Vertical);
    splitter->addWidget(chartArea);
    splitter->addWidget(tabbedBottom.container);
    splitter->setStretchFactor(0, 3);
    splitter->setStretchFactor(1, 1);
    splitter->setChildrenCollapsible(false);

    // 页签内滚动：把(图表+异常)分割器放进 QScrollArea。dock 够高→分割器填满(可拖动调整)；
    // dock 太矮→在页签内部出现竖滚动条(工具条/页签/标题固定)，而非整个面板滚动。
    auto* scroll = new QScrollArea(this);
    scroll->setWidgetResizable(true);
    scroll->setFrameShape(QFrame::NoFrame);
    scroll->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    scroll->setWidget(splitter);
    lay->addWidget(scroll, 1);

    // ---- 工具条开关 → 重建/重绘 ----
    connect(chkShowAnom, &QCheckBox::toggled, this, [this](bool on) {
        showAnomalies_ = on;
        if (contourItem_) { contourItem_->setShowAnomalies(on); plot_->replot(); }
    });
    connect(chkShowContourLabel, &QCheckBox::toggled, this, [this](bool on) {
        showLabels_ = on;
        if (contourItem_) { contourItem_->setShowLabels(on); plot_->replot(); }
    });
}

GridDataChartView::~GridDataChartView() {
    // colorSvc_ 非 QObject、无 parent，需手动释放（contourItem_ 由 QwtPlot autoDelete 处理）。
    delete colorSvc_;
}

void GridDataChartView::setData(const geopro::controller::DatasetDetailController::ChartData& d) {
    data_ = d;
    // 开页：仅把 anomalies 喂给底部异常列表；图表区待网格数据懒加载后填充。
    anomalyTable_->setAnomalies(d.anomalies, {}, {});
}

void GridDataChartView::setGridData(const geopro::core::Grid& grid,
                                    const geopro::core::ColorScale& gridScale,
                                    const std::vector<geopro::core::Anomaly>& anoms) {
    grid_ = grid;
    gridScale_ = gridScale;
    anoms_ = anoms;
    hasGrid_ = true;

    // 重建色彩服务（旧 contourItem 已 detach/delete）。
    delete colorSvc_;
    colorSvc_ = new ColorMapService(gridScale_);

    rebuildContour();

    // 色阶条 + 底部异常表（懒加载结果含真实异常）。
    colorBar_->setColorScale(gridScale_);
    anomalyTable_->setAnomalies(anoms_, {}, {});
}

void GridDataChartView::rebuildContour() {
    if (!hasGrid_ || !colorSvc_) return;

    // 卸载旧项：QwtPlot 默认 autoDelete=true（析构时 delete 仍在 dict 的 item）。
    // 必须先 detach()（从 dict 移除）再 delete，否则 QwtPlot 析构时会 double-free。
    if (contourItem_) {
        contourItem_->detach();
        delete contourItem_;
        contourItem_ = nullptr;
    }

    contourItem_ = new ContourPlotItem();
    contourItem_->setData(grid_, colorSvc_, anoms_, /*showLines*/ true, showLabels_);
    contourItem_->setShowAnomalies(showAnomalies_);
    contourItem_->attach(plot_);

    // 轴范围 = 数据范围（x=距离、y=深度/高程）。
    const QRectF bbox = contourItem_->boundingRect();
    if (!bbox.isNull()) {
        plot_->setAxisScale(QwtPlot::xBottom, bbox.left(), bbox.right());
        plot_->setAxisScale(QwtPlot::yLeft, bbox.top(), bbox.bottom());
    }
    plot_->updateAxes();
    if (rescaler_) rescaler_->rescale();  // 应用真实比尺
    plot_->replot();
}

}  // namespace geopro::app