// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-1.1 OR LicenseRef-Slint-commercial

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

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;
    in property <bool> primary <=> native.primary;
    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 Switch inherits NativeCheckBox {
    accessible-checkable: true;
    accessible-checked <=> root.checked;
    accessible-label <=> root.text;
    accessible-role: checkbox;
}

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;
    min-width: max(160px, layout.min-height);
    min-height: max(32px, layout.min-height);

    public function select-all() {
        inner.select-all();
    }
    public function clear-selection() {
        inner.clear-selection();
    }
    public function cut() {
        inner.cut();
    }
    public function copy() {
        inner.copy();
    }
    public function paste() {
        inner.paste();
    }

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

    layout := 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;

    callback current-item-changed(int /* current-item */);
    callback item-pointer-event(int /* item-index */, PointerEvent /* event */, Point /* absolute mouse position */);

    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);
            }

            pointer-event(pe) => {
                root.item-pointer-event(i, pe, {
                    x: self.absolute-position.x + self.mouse-x - root.absolute-position.x,
                    y: self.absolute-position.y + self.mouse-y - root.absolute-position.y,
                });
            }
        }
    }

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

        root.current-item = index;
        root.current-item-changed(current-item);

        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 {
    callback selected <=> i-base.selected;

    in property <[string]> model <=> i-base.model;
    in-out property <int> current-index <=> i-base.current-index;
    out property has-focus <=> i-base.has-focus;

    enabled: true;
    accessible-role: combobox;
    accessible-value <=> root.current-value;
    current-value: root.model[root.current-index];
    forward-focus: i-base;

    i-base := ComboBoxBase {
        width: 100%;
        height: 100%;
        current-value <=> root.current-value;

        show-popup => {
            i-popup.show();
        }
    }

    i-popup := PopupWindow {
        x: 0;
        y: root.height;
        width: root.width;

        NativeComboBoxPopup {
            width: 100%;
            height: 100%;
        }

        VerticalLayout {
            spacing: 0px;

            for value[index] in root.model: NativeStandardListViewItem {
                item: { text: value };
                is-selected: root.current-index == index;
                has-hover: ta.has-hover;
                combobox: true;

                ta := TouchArea {
                    clicked => {
                        i-base.select(index);
                    }
                }
            }
        }
    }
}

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 ProgressIndicator inherits NativeProgressIndicator {}