//
//  ToolWindow.qml
//
//  Created by Bradley Austin Davis on 12 Jan 2016
//  Copyright 2016 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

import QtQuick 2.5
import QtQuick.Controls 1.4
import QtQuick.Controls.Styles 1.4
import QtWebEngine 1.1
import Qt.labs.settings 1.0

import "windows-uit"
import "controls-uit"
import "styles-uit"

Window {
    id: toolWindow
    resizable: true
    objectName: "ToolWindow"
    destroyOnCloseButton: false
    destroyOnInvisible: false
    closable: true
    visible: false
    width: 384; height: 640;
    title: "Tools"
    property string newTabSource
    property alias tabView: tabView
    minSize: Qt.vector2d(400, 500)

    HifiConstants { id: hifi }

    onParentChanged: {
        if (parent) {
            x = 120;
            y = 120;
        }
    }

    Settings {
        category: "ToolWindow.Position"
        property alias x: toolWindow.x
        property alias y: toolWindow.y
    }

    property var webTabCreator: Component {
        WebView {
            id: webView
            property string originalUrl;

            // Both toolWindow.newTabSource and url can change, so we need
            // to store the original url here, without creating any bindings
            Component.onCompleted: {
                originalUrl = toolWindow.newTabSource;
                url = originalUrl;
            }
        }
    }

    TabView {
        id: tabView;
        width: pane.contentWidth
        height: pane.scrollHeight  // Pane height so that don't use Window's scrollbars otherwise tabs may be scrolled out of view.

        onCountChanged: {
            if (0 == count) {
                toolWindow.visible = false
            }
        }

        style: TabViewStyle {

            frame: Rectangle {  // Background shown before content loads.
                anchors.fill: parent
                color: hifi.colors.baseGray
            }

            frameOverlap: 0

            tab: Rectangle {
                implicitWidth: text.width
                implicitHeight: 3 * text.height
                color: styleData.selected ? hifi.colors.black : hifi.colors.tabBackgroundDark

                RalewayRegular {
                    id: text
                    text: styleData.title
                    font.capitalization: Font.AllUppercase
                    size: hifi.fontSizes.tabName
                    width: control.count > 1 ? styleData.availableWidth / control.count : implicitWidth + 2 * hifi.dimensions.contentSpacing.x
                    elide: Text.ElideRight
                    color: styleData.selected ? hifi.colors.primaryHighlight : hifi.colors.lightGrayText
                    horizontalAlignment: Text.AlignHCenter
                    anchors.centerIn: parent
                }

                Rectangle {  // Separator.
                    width: 1
                    height: parent.height
                    color: hifi.colors.black
                    anchors.left: parent.left
                    anchors.top: parent.top
                    visible: styleData.index > 0

                    Rectangle {
                        width: 1
                        height: 1
                        color: hifi.colors.baseGray
                        anchors.left: parent.left
                        anchors.bottom: parent.bottom
                    }
                }

                Rectangle {  // Active underline.
                    width: parent.width - (styleData.index > 0 ? 1 : 0)
                    height: 1
                    anchors.right: parent.right
                    anchors.bottom: parent.bottom
                    color: styleData.selected ? hifi.colors.primaryHighlight : hifi.colors.baseGray
                }
            }

            tabOverlap: 0
        }
    }

    function updateVisiblity() {
        for (var i = 0; i < tabView.count; ++i) {
            if (tabView.getTab(i).enabled) {
                return;
            }
        }
        visible = false;
    }

    function findIndexForUrl(source) {
        for (var i = 0; i < tabView.count; ++i) {
            var tab = tabView.getTab(i);
            if (tab && tab.item && tab.item.originalUrl &&
                tab.item.originalUrl === source) {
                return i;
            }
        }
        console.warn("Could not find tab for " + source);
        return -1;
    }

    function findTabForUrl(source) {
        var index = findIndexForUrl(source);
        if (index < 0) {
            return;
        }
        return tabView.getTab(index);
    }

    function showTabForUrl(source, newVisible) {
        var index = findIndexForUrl(source);
        if (index < 0) {
            return;
        }

        var tab = tabView.getTab(index);
        if (newVisible) {
            toolWindow.visible = true
            tab.enabled = true
        } else {
            tab.enabled = false;
            updateVisiblity();
        }
    }

    function removeTabForUrl(source) {
        var index = findIndexForUrl(source);
        if (index < 0) {
            return;
        }
        var tab = tabView.getTab(index);
        tab.enabledChanged.disconnect(updateVisiblity);
        tabView.removeTab(index);
        console.log("Updating visibility based on child tab removed");
        updateVisiblity();
    }

    function addWebTab(properties) {
        if (!properties.source) {
            console.warn("Attempted to open Web Tool Pane without URl")
            return;
        }

        var existingTabIndex = findIndexForUrl(properties.source);
        if (existingTabIndex >= 0) {
            console.log("Existing tab " + existingTabIndex + " found with URL " + properties.source)
            return tabView.getTab(existingTabIndex);
        }

        var title = properties.title || "Unknown";
        newTabSource = properties.source;
        var newTab = tabView.addTab(title, webTabCreator);
        newTab.active = true;
        newTab.enabled = false;

        if (properties.width) {
            tabView.width = Math.min(Math.max(tabView.width, properties.width),
                                        toolWindow.maxSize.x);
        }

        if (properties.height) {
            tabView.height = Math.min(Math.max(tabView.height, properties.height),
                                        toolWindow.maxSize.y);
        }

        console.log("Updating visibility based on child tab added");
        newTab.enabledChanged.connect(updateVisiblity)
        updateVisiblity();
        return newTab
    }
}