#include "panels/columns/DateRangeEdit.hpp"

#include <QCalendarWidget>
#include <QFrame>
#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>
#include <QToolButton>
#include <QVBoxLayout>

#include "Theme.hpp"

namespace geopro::app {

DateRangeEdit::DateRangeEdit(QWidget* parent) : QWidget(parent) {
    auto* lay = new QHBoxLayout(this);
    lay->setContentsMargins(0, 0, 0, 0);
    lay->setSpacing(0);
    btn_ = new QToolButton(this);
    btn_->setToolButtonStyle(Qt::ToolButtonTextOnly);
    btn_->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
    btn_->setPopupMode(QToolButton::InstantPopup);
    btn_->setToolTip(QStringLiteral("按采集时间筛选（起 ~ 止），可清空"));
    connect(btn_, &QToolButton::clicked, this, &DateRangeEdit::openPopup);
    lay->addWidget(btn_);
    updateText();
}

void DateRangeEdit::openPopup() {
    if (!popup_) {
        popup_ = new QFrame(this, Qt::Popup);
        popup_->setFrameShape(QFrame::StyledPanel);
        applyTokenizedStyleSheet(
            popup_, QStringLiteral("QFrame{background:{{bg/panel}};border:1px solid {{border/default}};"
                                   "border-radius:8px;}"));
        auto* v = new QVBoxLayout(popup_);
        v->setContentsMargins(space::kSm, space::kSm, space::kSm, space::kSm);

        auto* cals = new QHBoxLayout();
        auto* fromCol = new QVBoxLayout();
        fromCol->addWidget(new QLabel(QStringLiteral("起始"), popup_));
        fromCal_ = new QCalendarWidget(popup_);
        fromCol->addWidget(fromCal_);
        cals->addLayout(fromCol);
        auto* toCol = new QVBoxLayout();
        toCol->addWidget(new QLabel(QStringLiteral("结束"), popup_));
        toCal_ = new QCalendarWidget(popup_);
        toCol->addWidget(toCal_);
        cals->addLayout(toCol);
        v->addLayout(cals);

        auto* btns = new QHBoxLayout();
        auto* clr = new QPushButton(QStringLiteral("清空"), popup_);
        auto* ok = new QPushButton(QStringLiteral("确定"), popup_);
        connect(clr, &QPushButton::clicked, this, &DateRangeEdit::clearAndClose);
        connect(ok, &QPushButton::clicked, this, &DateRangeEdit::applyAndClose);
        btns->addWidget(clr);
        btns->addStretch(1);
        btns->addWidget(ok);
        v->addLayout(btns);
    }
    // 已有范围则定位到当前值，否则日历默认今天（不再 1752）。
    if (from_.isValid()) fromCal_->setSelectedDate(from_);
    if (to_.isValid()) toCal_->setSelectedDate(to_);
    popup_->adjustSize();
    popup_->move(mapToGlobal(QPoint(0, height())));
    popup_->show();
}

void DateRangeEdit::applyAndClose() {
    from_ = fromCal_->selectedDate();
    to_ = toCal_->selectedDate();
    if (from_.isValid() && to_.isValid() && from_ > to_) std::swap(from_, to_);  // 起>止则交换
    if (popup_) popup_->hide();
    updateText();
    emit rangeChanged();
}

void DateRangeEdit::clearAndClose() {
    from_ = QDate();
    to_ = QDate();
    if (popup_) popup_->hide();
    updateText();
    emit rangeChanged();
}

void DateRangeEdit::updateText() {
    if (!from_.isValid() && !to_.isValid()) {
        btn_->setText(QStringLiteral("全部时间 ▾"));
        return;
    }
    const QString f = from_.isValid() ? from_.toString(QStringLiteral("yyyy-MM-dd")) : QStringLiteral("不限");
    const QString t = to_.isValid() ? to_.toString(QStringLiteral("yyyy-MM-dd")) : QStringLiteral("不限");
    btn_->setText(QStringLiteral("%1 ~ %2 ▾").arg(f, t));
}

}  // namespace geopro::app