// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0

use i_slint_core::input::FocusEventResult;

use super::*;

#[repr(C)]
#[derive(FieldOffsets, Default, SlintElement)]
#[pin]
pub struct NativeStandardListViewItem {
    pub item: Property<i_slint_core::model::StandardListViewItem>,
    pub index: Property<i32>,
    pub is_selected: Property<bool>,
    pub cached_rendering_data: CachedRenderingData,
    pub has_hover: Property<bool>,
    pub has_focus: Property<bool>,
    pub pressed: Property<bool>,
    pub pressed_x: Property<LogicalLength>,
    pub pressed_y: Property<LogicalLength>,

    /// Specify that this item is in fact used in a ComboBox
    pub combobox: Property<bool>,
    widget_ptr: std::cell::Cell<SlintTypeErasedWidgetPtr>,
    animation_tracker: Property<i32>,
}

impl Item for NativeStandardListViewItem {
    fn init(self: Pin<&Self>, _self_rc: &ItemRc) {
        let animation_tracker_property_ptr = Self::FIELD_OFFSETS.animation_tracker.apply_pin(self);
        self.widget_ptr.set(cpp! { unsafe [animation_tracker_property_ptr as "void*"] -> SlintTypeErasedWidgetPtr as "std::unique_ptr<SlintTypeErasedWidget>"  {
            return make_unique_animated_widget<QWidget>(animation_tracker_property_ptr);
        }})
    }

    fn layout_info(
        self: Pin<&Self>,
        orientation: Orientation,
        _window_adapter: &Rc<dyn WindowAdapter>,
    ) -> LayoutInfo {
        let index: i32 = self.index();
        let item = self.item();
        let text: qttypes::QString = item.text.as_str().into();
        let combobox: bool = self.combobox();

        let s = cpp!(unsafe [
            index as "int",
            text as "QString",
            combobox as "bool"
        ] -> qttypes::QSize as "QSize" {
            ensure_initialized();

            QStyleOptionComboBox cb_opt;
            if (combobox && qApp->style()->styleHint(QStyle::SH_ComboBox_Popup, &cb_opt, nullptr)) {
                QStyleOptionMenuItem option;
                option.text = text;
                option.text.replace(QChar('&'), QLatin1String("&&"));
                return qApp->style()->sizeFromContents(QStyle::CT_MenuItem, &option, QSize{}, nullptr);
            } else {
                QStyleOptionViewItem option;
                option.decorationPosition = QStyleOptionViewItem::Left;
                option.decorationAlignment = Qt::AlignCenter;
                option.displayAlignment = Qt::AlignLeft|Qt::AlignVCenter;
                option.showDecorationSelected = qApp->style()->styleHint(QStyle::SH_ItemView_ShowDecorationSelected, nullptr, nullptr);
                if (index % 2) {
                    option.features |= QStyleOptionViewItem::Alternate;
                }
                option.features |= QStyleOptionViewItem::HasDisplay;
                option.text = text;
                return qApp->style()->sizeFromContents(QStyle::CT_ItemViewItem, &option, QSize{}, nullptr);
                }
        });
        let min = match orientation {
            Orientation::Horizontal => s.width,
            Orientation::Vertical => s.height,
        } as f32;
        LayoutInfo { min, preferred: min, ..LayoutInfo::default() }
    }

    fn input_event_filter_before_children(
        self: Pin<&Self>,
        _: MouseEvent,
        _window_adapter: &Rc<dyn WindowAdapter>,
        _self_rc: &ItemRc,
    ) -> InputEventFilterResult {
        InputEventFilterResult::ForwardAndIgnore
    }

    fn input_event(
        self: Pin<&Self>,
        _event: MouseEvent,
        _window_adapter: &Rc<dyn WindowAdapter>,
        _self_rc: &i_slint_core::items::ItemRc,
    ) -> InputEventResult {
        InputEventResult::EventIgnored
    }

    fn key_event(
        self: Pin<&Self>,
        _: &KeyEvent,
        _window_adapter: &Rc<dyn WindowAdapter>,
        _self_rc: &ItemRc,
    ) -> KeyEventResult {
        KeyEventResult::EventIgnored
    }

    fn focus_event(
        self: Pin<&Self>,
        _: &FocusEvent,
        _window_adapter: &Rc<dyn WindowAdapter>,
        _self_rc: &ItemRc,
    ) -> FocusEventResult {
        FocusEventResult::FocusIgnored
    }

    fn_render! { this dpr size painter widget initial_state =>
        let index: i32 = this.index();
        let is_selected: bool = this.is_selected();
        let combobox: bool = this.combobox();
        let has_hover: bool = this.has_hover();
        let has_focus: bool = this.has_focus();
        let item = this.item();
        let text: qttypes::QString = item.text.as_str().into();
        cpp!(unsafe [
            painter as "QPainterPtr*",
            widget as "QWidget*",
            size as "QSize",
            dpr as "float",
            index as "int",
            is_selected as "bool",
            has_hover as "bool",
            has_focus as "bool",
            text as "QString",
            initial_state as "int",
            combobox as "bool"
        ] {
            QStyleOptionComboBox cb_opt;
            if (combobox && qApp->style()->styleHint(QStyle::SH_ComboBox_Popup, &cb_opt, widget)) {
                widget->setProperty("_q_isComboBoxPopupItem", true);
                QStyleOptionMenuItem option;
                option.styleObject = widget;
                option.state |= QStyle::State(initial_state);
                option.rect = QRect(QPoint(), size / dpr);
                option.menuRect = QRect(QPoint(), size / dpr);
                option.state = QStyle::State_Enabled;
                if (has_hover) {
                    option.state |= QStyle::State_MouseOver;
                    option.state |= QStyle::State_Selected;
                }

                if (has_focus) {
                    option.state |= QStyle::State_HasFocus;
                    option.state |= QStyle::State_Selected;
                }
                option.text = text;
                option.text.replace(QChar('&'), QLatin1String("&&"));
                option.checked = is_selected;
                option.menuItemType = QStyleOptionMenuItem::Normal;
                //option.reservedShortcutWidth = 0;
                //option.maxIconWidth = 4;

                qApp->style()->drawControl(QStyle::CE_MenuItem, &option, painter->get(), widget);
                widget->setProperty("_q_isComboBoxPopupItem", {});
            } else {
                QStyleOptionViewItem option;
                option.styleObject = widget;
                option.state |= QStyle::State(initial_state);
                option.rect = QRect(QPoint(), size / dpr);
                option.state |= QStyle::State_Enabled;
                if (is_selected) {
                    option.state |= QStyle::State_Selected;
                }
                if (has_hover) {
                    option.state |= QStyle::State_MouseOver;
                }
                if (has_focus) {
                    option.state |= QStyle::State_HasFocus;
                }
                option.decorationPosition = QStyleOptionViewItem::Left;
                option.decorationAlignment = Qt::AlignCenter;
                option.displayAlignment = Qt::AlignLeft|Qt::AlignVCenter;
                option.showDecorationSelected = qApp->style()->styleHint(QStyle::SH_ItemView_ShowDecorationSelected, nullptr, nullptr);

                if (index % 2) {
                    option.features |= QStyleOptionViewItem::Alternate;
                }
                option.features |= QStyleOptionViewItem::HasDisplay;

                option.text = text;

                qApp->style()->drawPrimitive(QStyle::PE_PanelItemViewRow, &option, painter->get(), widget);
                qApp->style()->drawControl(QStyle::CE_ItemViewItem, &option, painter->get(), widget);
            }
        });
    }
}

impl ItemConsts for NativeStandardListViewItem {
    const cached_rendering_data_offset: const_field_offset::FieldOffset<Self, CachedRenderingData> =
        Self::FIELD_OFFSETS.cached_rendering_data.as_unpinned_projection();
}

declare_item_vtable! {
fn slint_get_NativeStandardListViewItemVTable() -> NativeStandardListViewItemVTable for NativeStandardListViewItem
}