// Copyright © SixtyFPS GmbH <info@slint-ui.com>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial

// cSpell: ignore combobox spinbox

import { LineEditInner, TextEdit, AboutSlint } from "../common/common.slint";
import { StyleMetrics, ScrollView  } from "std-widgets-impl.slint";
export { StyleMetrics, ScrollView, TextEdit, AboutSlint }

export component Button {
    in property<string> text <=> native.text;
    out property<bool> has-focus <=> native.has-focus;
    out property<bool> pressed <=> native.pressed;
    in property<bool> enabled <=> native.enabled;
    in property<bool> checkable <=> native.checkable;
    in-out property<bool> checked <=> native.checked;
    in property<image> icon <=> native.icon;
    callback clicked <=> native.clicked;

    accessible-checkable: root.checkable;
    accessible-checked: root.checked;
    accessible-label: root.text;
    accessible-role: button;

    HorizontalLayout {
        native := NativeButton {
            checkable: false;
            enabled: true;
        }
    }
}

export component StandardButton {
    in property<StandardButtonKind> kind <=> native.standard-button-kind;
    out property<bool> has-focus <=> native.has-focus;
    out property<bool> pressed <=> native.pressed;
    in property<bool> enabled <=> native.enabled;
    callback clicked <=> native.clicked;

    accessible-label: native.text;
    accessible-role: button;

    HorizontalLayout {
        native := NativeButton {
            is-standard-button: true;
            checkable: false;
        }
    }
}

export component CheckBox inherits NativeCheckBox {
    accessible-checkable: true;
    accessible-checked <=> root.checked;
    accessible-label <=> root.text;
    accessible-role: checkbox;
}
export component SpinBox inherits NativeSpinBox {
    accessible-role: spinbox;
    accessible-value: root.value;
    accessible-value-minimum: root.minimum;
    accessible-value-maximum: root.maximum;
    accessible-value-step: (root.maximum - root.minimum) / 100;
}

export component Slider inherits NativeSlider {
    accessible-role: slider;
    accessible-value: root.value;
    accessible-value-minimum: root.minimum;
    accessible-value-maximum: root.maximum;
    accessible-value-step: (root.maximum - root.minimum) / 100;

    out property <bool> has-focus: fs.has-focus;

    fs := FocusScope {
        x:0;
        width: 0px;

        key-pressed(event) => {
            if (root.enabled && event.text == Key.RightArrow) {
                root.value = Math.min(root.value + 1, root.maximum);
                accept
            } else if (root.enabled && event.text == Key.LeftArrow) {
                root.value = Math.max(root.value - 1, root.minimum);
                accept
            } else {
                reject
            }
        }
    }

}

export component GroupBox {
    in property title <=> native.title;
    in property enabled <=> native.enabled;
    native := NativeGroupBox {
        GridLayout {
            padding-left: native.native-padding-left;
            padding-right: native.native-padding-right;
            padding-top: native.native-padding-top;
            padding-bottom: native.native-padding-bottom;
            @children
        }
    }
}

export component LineEdit {
    in property <length> font-size <=> inner.font-size;
    in-out property <string> text <=> inner.text;
    in property <string> placeholder-text <=> inner.placeholder-text;
    in property input-type <=> inner.input-type;
    in property horizontal-alignment <=> inner.horizontal-alignment;
    in property read-only <=> inner.read-only;
    out property<bool> has-focus <=> inner.has-focus;
    in property<bool> enabled: true;
    forward-focus: inner;
    callback accepted <=> inner.accepted;
    callback edited <=> inner.edited;
    horizontal-stretch: 1;
    vertical-stretch: 0;

    native := NativeLineEdit {
        has-focus <=> root.has-focus;
        enabled: root.enabled;
        width: 100%;
        height: 100%;
    }

    HorizontalLayout {
        padding-left: native.native-padding-left;
        padding-right: native.native-padding-right;
        padding-top: native.native-padding-top;
        padding-bottom: native.native-padding-bottom;
        inner := LineEditInner {
            placeholder-color: self.enabled ? StyleMetrics.placeholder-color : StyleMetrics.placeholder-color-disabled;
            enabled: root.enabled;
        }
    }
}

export component ListView inherits ScrollView {
    @children
}

component StandardListViewBase inherits ListView {
    private property <length> item-height: self.viewport-height / self.model.length;
    private property <length> current-item-y: self.viewport-y + current-item * item-height;

    in property<[StandardListViewItem]> model;
    in-out property<int> current-item: -1;

    for item[i] in root.model : NativeStandardListViewItem {
        item: item;
        index: i;
        is-selected: root.current-item == i;
        has-hover: ta.has-hover;

        ta := TouchArea {
            clicked => { 
                set-current-item(i);    
            }
        }
    }

    public function set-current-item(index: int) {
        if(index < 0 || index >= model.length) {
            return;
        }

        root.current-item = index;

        if(current-item-y < 0) {
            self.viewport-y += 0 - current-item-y;
        }
        
        if(current-item-y + item-height > self.visible-height) {
            self.viewport-y -= current-item-y + item-height - self.visible-height;
        }
    }
}

export component StandardListView inherits StandardListViewBase {
    FocusScope {
        key-pressed(event) => {
            if (event.text == Key.UpArrow) {
                root.set-current-item(root.current-item - 1);
                return accept;
            } else if (event.text == Key.DownArrow) {
                root.set-current-item(root.current-item + 1);
                return accept;
            }
            reject
        }
    }
}

export component ComboBox inherits NativeComboBox {
    in property <[string]> model;
    in-out property <int> current-index : -1;
    out property has-focus <=> fs.has-focus;
    enabled: true;
    callback selected(string);
    forward-focus: fs;

    accessible-role: combobox;
    accessible-value <=> root.current-value;

    popup := PopupWindow {
        x:0;
        Rectangle { background: NativeStyleMetrics.window-background; }
        NativeComboBoxPopup {
            width: 100%;
            height: 100%;
        }
        y: root.height;
        width: root.width;
        VerticalLayout {
            spacing: 0px;
            for value[i] in root.model: NativeStandardListViewItem {
                item: { text: value };
                is-selected: root.current-index == i;
                has-hover: ta.has-hover;
                ta := TouchArea {
                    clicked => {
                        if (root.enabled) {
                            root.current-index = i;
                            root.current-value = value;
                            root.selected(root.current-value);
                        }
                        //is-open = false;
                    }
                }
            }
        }
    }

    fs := FocusScope {
        key-pressed(event) => {
            if (event.text == Key.UpArrow) {
                root.current-index = Math.max(root.current-index - 1, 0);
                root.current-value = root.model[root.current-index];
                return accept;
            } else if (event.text == Key.DownArrow) {
                root.current-index = Math.min(root.current-index + 1, root.model.length - 1);
                root.current-value = root.model[root.current-index];
                return accept;
            // PopupWindow can not get hidden again at this time, so do not allow to pop that up.
            // } else if (event.text == Key.Return) {
            //     touch.clicked()
            //     return accept;
            }
            return reject;
        }

        touch := TouchArea {
            enabled <=> root.enabled;
            clicked => {
                root.focus();
                popup.show();
            }
        }
    }
}

export component TabWidgetImpl inherits NativeTabWidget { }

export component TabImpl inherits NativeTab {
    accessible-role: tab;
    accessible-label <=> root.title;
}

export component TabBarImpl {
    // injected properties:
    in-out property<int> current; // The currently selected tab
    in-out property<int> current-focused: fs.has-focus ? root.current : -1; // The currently focused tab
    in-out property<int> num-tabs; // The total number of tabs

    accessible-role: tab;
    accessible-delegate-focus: root.current;

    Rectangle {
        clip: true; // The breeze style draws outside of the tab bar, which is clip by default with Qt
        HorizontalLayout {
            spacing: 0px; // Qt renders Tabs next to each other and renders "spacing" as part of the tab itself
            alignment: NativeStyleMetrics.tab-bar-alignment;
            @children
        }
    }

    fs := FocusScope {
        x:0;
        width: 0px; // Do not react on clicks
        key-pressed(event) => {
            if (event.text == Key.LeftArrow) {
                 root.current = Math.max(root.current - 1,  0);
                 return accept;
            }
            if (event.text == Key.RightArrow) {
                 root.current = Math.min(root.current + 1, root.num-tabs - 1);
                 return accept;
            }
            return reject;
        }
    }
}

export component TabWidget inherits TabWidget {}

export component VerticalBox inherits VerticalLayout {
    spacing: NativeStyleMetrics.layout-spacing;
    padding: NativeStyleMetrics.layout-spacing;
}

export component HorizontalBox inherits HorizontalLayout {
    spacing: NativeStyleMetrics.layout-spacing;
    padding: NativeStyleMetrics.layout-spacing;
}

export component GridBox inherits GridLayout {
    spacing: NativeStyleMetrics.layout-spacing;
    padding: NativeStyleMetrics.layout-spacing;
}

export component StandardTableView {
    callback sort-ascending(int);
    callback sort-descending(int);

    out property <int> current-sort-column: -1;
    in-out property <[TableColumn]> columns;
    in property <[[StandardListViewItem]]> rows;

    horizontal-stretch: 1;
    vertical-stretch: 1;

    function sort(index: int) {
        if (current-sort-column != index) {
            columns[current-sort-column].sort-order = SortOrder.unsorted;
        }

        if(columns[index].sort-order == SortOrder.ascending) {
            columns[index].sort-order = SortOrder.descending;
            sort-descending(index);
        } else {
            columns[index].sort-order = SortOrder.ascending;
            sort-ascending(index);
        }

        current-sort-column = index;
    }

    scroll-view := NativeScrollView {
        vertical-max: fli.viewport-height > fli.height ? fli.viewport-height - fli.height : 0phx;
        vertical-page-size: fli.height;

        horizontal-max: fli.viewport-width > fli.width ? fli.viewport-width - fli.width : 0phx;
        horizontal-page-size: fli.width;

        fli := Flickable {
            x: scroll-view.native-padding-left;
            width: scroll-view.width - scroll-view.native-padding-left - scroll-view.native-padding-right;
            y: scroll-view.native-padding-top + header.height;
            height: scroll-view.height - self.y - scroll-view.native-padding-bottom;
            interactive: false;
            viewport-y <=> scroll-view.vertical-value;
            viewport-x <=> scroll-view.horizontal-value;

            VerticalLayout {
                alignment: start;

                for row[i] in rows : Rectangle {
                    width: max(row-layout.preferred-width, fli.width);
                    row-ta := TouchArea {}
                    row-layout := HorizontalLayout {
                        for cell[index] in row : Rectangle {
                            horizontal-stretch: columns[index].horizontal-stretch;
                            min-width: max(columns[index].min-width, columns[index].width);
                            preferred-width: self.min-width;
                            max-width: (index < columns.length && columns[index].width >= 1px) ? max(columns[index].min-width, columns[index].width) : 100000px;
                            HorizontalLayout {
                                NativeStandardListViewItem {
                                    item: cell;
                                    index: i;
                                    //is-selected: root.current-item == i;
                                    has-hover: row-ta.has-hover;
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    header := Rectangle {
        clip: true;
        height: header-layout.preferred-height;
        x: scroll-view.native-padding-left;
        y: scroll-view.native-padding-top;
        width: fli.width;

        header-layout := HorizontalLayout {
            width: max(self.preferred-width, parent.width);
            x: fli.viewport-x;
            for column[index] in columns : NativeTableHeaderSection {
                item: column;
                horizontal-stretch: column.horizontal-stretch;
                min-width: max(column.min-width, column.width);
                preferred-width: self.min-width;
                max-width: (index < columns.length && column.width >= 1px) ? max(column.min-width, column.width) : 100000px;

                TouchArea {
                    clicked => {
                        sort(index);
                    }
                }

                TouchArea {
                    width: 10px;
                    x: parent.width - self.width / 2;
                    moved => {
                        if (self.pressed) {
                            column.width = max(1px, parent.width + (self.mouse-x - self.pressed-x));
                        }
                    }
                    mouse-cursor: ew-resize;
                }
            }
        }
    }

}