import { ScrollView, TextEdit } from "std-widgets.slint";
import { SettingsDialog, SettingsButton } from "settings_controls.slint";
import { WorkbenchStyle } from "workbench_controls.slint";
import { UiRadius } from "ui_radius.slint";
import { GalleryStrings } from "device_strings.slint";
import { FontAwesomeIcons } from "common.slint";
import "../assets/fonts/message_spacing.ttf";

export enum AboutPage { overview, components, component, document, source }
export struct AboutDocument { title: string, text: string }
export struct AboutComponent {
    id: string,
    name: string,
    version: string,
    license: string,
    source-url: string,
    documents: [AboutDocument],
}

export global AboutStrings {
    out property <string> software-license: GalleryStrings.tr("软件许可", "Software license", "Лицензия программы");
    out property <string> components: GalleryStrings.tr("开源组件", "Open-source components", "Компоненты с открытым кодом");
    out property <string> source: GalleryStrings.tr("源码与构建说明", "Source code and build instructions", "Исходный код и сборка");
    out property <string> notices: GalleryStrings.tr("许可与版权声明", "Licenses and copyright notices", "Лицензии и авторские права");
    out property <string> view-source: GalleryStrings.tr("查看源码", "View source code", "Открыть исходный код");
    out property <string> back: GalleryStrings.tr("返回", "Back", "Назад");
}

export component AboutNavigationGroup inherits Rectangle {
    height: rows.preferred-height + 2px;
    background: WorkbenchStyle.surface;
    border-radius: UiRadius.control;
    border-width: 1px; border-color: WorkbenchStyle.separator;
    clip: true;
    rows := VerticalLayout {
        x: 1px; y: 1px; width: parent.width - 2px;
        height: self.preferred-height; padding: 0px; spacing: 0px;
        @children
    }
}

export component AboutRowSeparator inherits Rectangle {
    height: 1px;
    Rectangle {
        x: 14px; width: parent.width - 30px; height: 1px;
        background: WorkbenchStyle.separator;
    }
}

export component AboutNavigationRow inherits Rectangle {
    in property <string> title;
    in property <string> subtitle;
    in property <string> icon;
    in property <string> detail;
    in property <bool> grouped: false;
    in property <bool> external: false;
    callback clicked;
    min-width: 0px;
    min-height: max(44px, labels.preferred-height + 20px);
    background: touch.pressed ? WorkbenchStyle.pressed-surface
        : touch.has-hover ? WorkbenchStyle.hover-surface : WorkbenchStyle.surface;
    border-radius: root.grouped ? 0px : UiRadius.control;
    border-width: root.grouped ? 0px : 1px; border-color: WorkbenchStyle.separator;
    accessible-role: button;
    accessible-label: root.title + (root.subtitle != "" ? ", " + root.subtitle : "")
        + (root.detail != "" ? ", " + root.detail : "");
    accessible-action-default => { root.clicked(); }
    if root.icon != "": Rectangle {
        x: 12px; y: (parent.height - self.height) / 2;
        width: 28px; height: 28px;
        border-radius: UiRadius.control;
        background: WorkbenchStyle.field-surface;
        Text {
            text: root.icon; font-family: "Font Awesome 6 Free"; font-weight: 900;
            font-size: 13px; color: WorkbenchStyle.muted;
            horizontal-alignment: center; vertical-alignment: center;
            accessible-role: none;
        }
    }
    labels := VerticalLayout {
        x: root.icon != "" ? 52px : 14px;
        y: (parent.height - self.height) / 2;
        width: parent.width - self.x - 36px - (root.detail != "" ? detail-label.width + 12px : 0px);
        height: self.preferred-height; spacing: 4px;
        Text { text: root.title; color: WorkbenchStyle.text; font-size: 13px; wrap: word-wrap; }
        if root.subtitle != "": Text {
            text: root.subtitle; color: WorkbenchStyle.muted; font-size: 11px; wrap: word-wrap;
        }
    }
    detail-label := Text {
        x: parent.width - self.width - 36px; height: parent.height;
        width: min(100px, self.preferred-width);
        text: root.detail; color: WorkbenchStyle.muted; font-size: 11px;
        vertical-alignment: center; overflow: elide;
        accessible-role: none;
    }
    Text {
        x: parent.width - 30px; width: 18px; height: parent.height;
        text: root.external ? FontAwesomeIcons.arrow-up-right-from-square : FontAwesomeIcons.angle-right;
        font-family: "Font Awesome 6 Free"; font-weight: 900;
        color: touch.has-hover ? WorkbenchStyle.accent : WorkbenchStyle.muted;
        font-size: 11px; vertical-alignment: center; horizontal-alignment: center;
        accessible-role: none;
    }
    touch := TouchArea { mouse-cursor: pointer; clicked => { root.clicked(); } }
}

export component AboutPanel inherits SettingsDialog {
    show-close-button: false;
    in-out property <AboutPage> page: AboutPage.components;
    in-out property <int> component-index: 0;
    private property <int> document-index: 0;
    in property <[AboutComponent]> components;
    in property <int> openfec-index: -1;
    in property <string> revision;
    in property <string> source-url;
    in property <string> build-url;
    private property <AboutComponent> selected: root.components[root.component-index];
    callback back;
    callback open-link(string);
    title: root.page == AboutPage.components ? AboutStrings.components
        : root.page == AboutPage.source ? AboutStrings.source
        : root.page == AboutPage.document ? AboutStrings.notices
        : root.selected.name;

    if root.page != AboutPage.document: ScrollView {
        x: 24px; y: root.content-top; width: parent.width - 48px + 22px;
        height: footer.y - self.y - 16px;
        viewport-width: self.visible-width;
        viewport-height: content.preferred-height;
        horizontal-scrollbar-policy: always-off;
        vertical-scrollbar-policy: as-needed;
        content := VerticalLayout {
            width: parent.width; height: self.preferred-height;
            padding: 0px; padding-right: 22px; spacing: 10px;
            if root.page == AboutPage.components: VerticalLayout {
                padding: 0px; spacing: 10px;
                Text {
                    text: GalleryStrings.tr("以下列出本版本的主要开源组件。各组件遵循各自的开源许可。", "Main open-source components used in this build. Each component is covered by its own license.", "Основные открытые компоненты этой сборки. Каждый распространяется по своей лицензии.");
                    color: WorkbenchStyle.muted; font-size: 12px; wrap: word-wrap;
                }
                Rectangle {
                    height: notice.preferred-height + 32px;
                    background: WorkbenchStyle.field-surface; border-radius: UiRadius.control;
                    notice := VerticalLayout {
                        x: 16px; y: 16px; width: parent.width - 32px;
                        height: self.preferred-height; spacing: 12px;
                        Text { text: GalleryStrings.tr("OpenFEC 告知", "OpenFEC notice", "Уведомление OpenFEC"); color: WorkbenchStyle.text; font-size: 14px; font-weight: 600; }
                        Text {
                            text: GalleryStrings.tr("本应用使用 OpenFEC 提供前向纠错功能，遵循 CeCILL-C 1.0 许可。该许可规定了有限保证及责任限制，详情见许可全文。", "This application uses OpenFEC for forward error correction under CeCILL-C 1.0, which provides limited warranties and limits liability. See the full license for details.", "Приложение использует OpenFEC для прямого исправления ошибок по лицензии CeCILL-C 1.0 с ограниченной гарантией и ответственностью. Подробности — в тексте лицензии.");
                            color: WorkbenchStyle.muted; font-size: 13px; wrap: word-wrap;
                            font-family: "CrossDesk Message Spacing";
                        }
                        Text {
                            text: "(c) Copyright 2009 - 2012 INRIA - All rights reserved";
                            color: WorkbenchStyle.muted; font-size: 11px; wrap: word-wrap;
                            font-family: "CrossDesk Message Spacing";
                        }
                        if root.openfec-index >= 0: AboutNavigationRow {
                            title: GalleryStrings.tr("OpenFEC 许可与源码", "OpenFEC license and source", "Лицензия и исходный код OpenFEC");
                            clicked => { root.component-index = root.openfec-index; root.page = AboutPage.component; }
                        }
                    }
                }
                for component[index] in root.components: VerticalLayout {
                    padding: 0px; spacing: 0px;
                    if component.id != "crossdesk" && component.id != "openfec": AboutNavigationRow {
                        title: component.name;
                        subtitle: component.version + " · " + component.license;
                        clicked => { root.component-index = index; root.page = AboutPage.component; }
                    }
                }
            }
            if root.page == AboutPage.component: VerticalLayout {
                padding: 0px; spacing: 12px;
                Text { text: root.selected.version + " · " + root.selected.license; color: WorkbenchStyle.muted; font-size: 12px; wrap: word-wrap; }
                AboutNavigationRow {
                    title: AboutStrings.view-source; external: true;
                    clicked => { root.open-link(root.selected.source-url); }
                }
                Text { text: AboutStrings.notices; color: WorkbenchStyle.text; font-size: 13px; font-weight: 600; }
                for document[index] in root.selected.documents: AboutNavigationRow {
                    title: document.title;
                    clicked => { root.document-index = index; root.page = AboutPage.document; }
                }
                if root.selected.documents.length == 0: Text {
                    text: GalleryStrings.tr("本组件未内置许可文本，请通过“查看源码”查阅许可与版权声明。", "License text is not bundled for this component. Use View source code to read its license and copyright notices.", "Текст лицензии не включён. Откройте исходный код для просмотра лицензии и авторских прав.");
                    color: WorkbenchStyle.muted; font-size: 12px; wrap: word-wrap;
                }
            }
            if root.page == AboutPage.source: VerticalLayout {
                padding: 0px; spacing: 12px;
                Text {
                    text: root.revision != "" ? GalleryStrings.tr("源码版本：", "Source revision: ", "Ревизия исходного кода: ") + root.revision
                        : GalleryStrings.tr("本版本源码信息暂不可用。", "Source revision is unavailable for this build.", "Ревизия исходного кода этой сборки недоступна.");
                    color: WorkbenchStyle.text; font-size: 13px; wrap: word-wrap;
                }
                AboutNavigationRow { title: AboutStrings.view-source; external: true; clicked => { root.open-link(root.source-url); } }
                AboutNavigationRow {
                    title: GalleryStrings.tr("构建说明", "Build instructions", "Инструкции по сборке"); external: true;
                    clicked => { root.open-link(root.build-url); }
                }
                AboutNavigationRow {
                    title: GalleryStrings.tr("项目主页", "Project website", "Сайт проекта"); external: true;
                    clicked => { root.open-link("https://crossdesk.cn"); }
                }
            }
        }
    }
    if root.page == AboutPage.document: VerticalLayout {
        x: 24px; y: root.content-top; width: parent.width - 48px;
        height: footer.y - self.y - 16px; spacing: 12px;
        Text { text: root.selected.documents[root.document-index].title; color: WorkbenchStyle.text; font-size: 13px; font-weight: 600; wrap: word-wrap; }
        TextEdit {
            text: root.selected.documents[root.document-index].text;
            read-only: true; wrap: word-wrap; font-size: 14px;
            // Use the same 1.5em line spacing as other long-form reading views.
            font-family: "CrossDesk Message Spacing";
            vertical-stretch: 1;
            key-pressed(event) => {
                if event.text == Key.Escape { root.back(); return accept; }
                return reject;
            }
        }
    }
    footer := VerticalLayout {
        x: 24px; y: parent.height - self.height - 24px;
        width: parent.width - 48px; height: self.preferred-height; spacing: 12px;
        Rectangle { height: 1px; background: WorkbenchStyle.separator; }
        HorizontalLayout {
            alignment: end;
            SettingsButton { text: AboutStrings.back; clicked => { root.back(); } }
        }
    }
}