#include "props/CameraPropertySection.h"

#include "params/ParamControls.h"

#include <QCheckBox>
#include <QDoubleSpinBox>
#include <QFormLayout>
#include <QLabel>
#include <QLineEdit>
#include <QVBoxLayout>

namespace gui {

CameraPropertySection::CameraPropertySection(QWidget* parent) : PropertySectionWidget(parent) {
    auto* lay = new QVBoxLayout(this);
    lay->setContentsMargins(0, 0, 0, 0);
    lay->setSpacing(6);

    auto* form = new QFormLayout();
    form->setContentsMargins(0, 0, 0, 0);
    form->setSpacing(6);

    m_name = new QLineEdit(this);
    m_name->setPlaceholderText(QStringLiteral("显示名称…"));
    form->addRow(QStringLiteral("名称"), m_name);

    m_center = new Vec2ParamControl(this);
    m_center->setToolTip(QStringLiteral("摄像机中心（世界坐标），与画布上黄色圆点一致"));
    form->addRow(QStringLiteral("中心"), m_center);

    m_viewScale = new QDoubleSpinBox(this);
    m_viewScale->setRange(1e-4, 1000.0);
    m_viewScale->setDecimals(5);
    m_viewScale->setSingleStep(0.01);
    m_viewScale->setToolTip(QStringLiteral(
        "视口缩放：在参考分辨率 1600×900 下的像素/世界单位比（与预览、画布上镜头框一致）；"
        "不随当前窗口大小改变镜头覆盖的世界范围。数值越小，可见的世界范围越大。"));
    form->addRow(QStringLiteral("缩放"), m_viewScale);

    m_activePreview = new QCheckBox(QStringLiteral("用作预览展示镜头"), this);
    m_activePreview->setToolTip(QStringLiteral("进入预览展示时，按该摄像机在当前帧的位置与缩放呈现画面"));
    form->addRow(QStringLiteral("预览"), m_activePreview);

    lay->addLayout(form);
    lay->addStretch(1);

    connect(m_name, &QLineEdit::editingFinished, this, [this]() {
        if (m_name) emit displayNameCommitted(m_name->text());
    });
    connect(m_center, &Vec2ParamControl::valueChanged, this, [this](double x, double y) { emit centerEdited(x, y); });
    connect(m_viewScale, qOverload<double>(&QDoubleSpinBox::valueChanged), this,
            &CameraPropertySection::viewScaleEdited);
    connect(m_activePreview, &QCheckBox::toggled, this, &CameraPropertySection::activePreviewToggled);
}

void CameraPropertySection::setEditingEnabled(bool on) {
    for (auto* w : {static_cast<QWidget*>(m_name), static_cast<QWidget*>(m_center), static_cast<QWidget*>(m_viewScale),
                    static_cast<QWidget*>(m_activePreview)}) {
        if (w) w->setEnabled(on);
    }
}

void CameraPropertySection::clearDisconnected() {
    setEditingEnabled(false);
    if (m_name) {
        m_name->blockSignals(true);
        m_name->clear();
        m_name->blockSignals(false);
    }
    if (m_center) {
        m_center->blockSignals(true);
        m_center->setValue(0.0, 0.0);
        m_center->blockSignals(false);
    }
    if (m_viewScale) {
        m_viewScale->blockSignals(true);
        m_viewScale->setValue(1.0);
        m_viewScale->blockSignals(false);
    }
    if (m_activePreview) {
        m_activePreview->blockSignals(true);
        m_activePreview->setChecked(false);
        m_activePreview->blockSignals(false);
    }
}

void CameraPropertySection::applyState(const CameraPropertyUiState& s) {
    setEditingEnabled(true);
    if (m_name) {
        m_name->blockSignals(true);
        m_name->setText(s.displayName);
        m_name->blockSignals(false);
    }
    if (m_center) {
        m_center->blockSignals(true);
        m_center->setValue(s.centerWorld.x(), s.centerWorld.y());
        m_center->blockSignals(false);
    }
    if (m_viewScale) {
        m_viewScale->blockSignals(true);
        m_viewScale->setValue(s.viewScale);
        m_viewScale->blockSignals(false);
    }
    if (m_activePreview) {
        m_activePreview->blockSignals(true);
        m_activePreview->setChecked(s.isActivePreviewCamera);
        m_activePreview->blockSignals(false);
    }
}

}  // namespace gui