import QtQuick
import QtQuick.Controls as QQC2
import QtQuick.Layouts
import org.kde.kcmutils as KCM
import org.kde.kirigami as Kirigami
import org.kde.plasma.plasma5support as Plasma5Support

import "../../code/nas.js" as Nas

KCM.ScrollViewKCM {
    id: page

    // The hosts JSON is bound to the config framework through a hidden holder,
    // so load/save "just work"; we mirror it into the visible ListModel.
    property alias cfg_hosts: store.json

    QtObject {
        id: store
        property string json: "[]"
        onJsonChanged: page.rebuildModel()
    }

    ListModel { id: hostsModel }

    property bool building: false

    function rebuildModel() {
        if (building) return;
        var hosts = Nas.parseHosts(store.json);
        hostsModel.clear();
        for (var i = 0; i < hosts.length; ++i) {
            var h = hosts[i];
            hostsModel.append({
                id: h.id || "", label: h.label || "", host: h.host || "",
                username: h.username || "", domain: h.domain || "",
                mountRoot: h.mountRoot || "", vers: h.vers || ""
            });
        }
    }

    function persist() {
        var arr = [];
        for (var i = 0; i < hostsModel.count; ++i) {
            var r = hostsModel.get(i);
            arr.push({
                id: r.id, label: r.label, host: r.host, username: r.username,
                domain: r.domain, mountRoot: r.mountRoot, vers: r.vers
            });
        }
        building = true;
        store.json = JSON.stringify(arr);
        building = false;
    }

    function newId() {
        return "h" + Date.now().toString(36) + Math.floor(Math.random() * 100000).toString(36);
    }

    Component.onCompleted: rebuildModel()

    // Runs kwallet-query to store/remove per-host passwords.
    Plasma5Support.DataSource {
        id: exe
        engine: "executable"
        property var cbs: ({})
        property int nonce: 0
        onNewData: function (source, data) {
            var cb = cbs[source];
            disconnectSource(source);
            if (cb) { delete cbs[source]; cb(data["exit code"]); }
        }
        function run(cmd, cb) {
            var key = cmd + " tok" + (nonce++);
            cbs[key] = cb || function () {};
            connectSource(key);
        }
    }

    header: Kirigami.InlineMessage {
        Layout.fillWidth: true
        visible: hostsModel.count === 0
        type: Kirigami.MessageType.Information
        text: i18n("No NAS hosts yet. Add a Synology or SMB server to browse its shares.")
    }

    view: ListView {
        id: hostsView
        model: hostsModel
        delegate: QQC2.ItemDelegate {
            id: hostDelegate
            width: ListView.view.width
            hoverEnabled: true

            required property int index
            required property string label
            required property string host
            required property string username

            contentItem: RowLayout {
                spacing: Kirigami.Units.smallSpacing
                Kirigami.Icon {
                    source: "network-server"
                    Layout.preferredWidth: Kirigami.Units.iconSizes.medium
                    Layout.preferredHeight: Kirigami.Units.iconSizes.medium
                }
                ColumnLayout {
                    Layout.fillWidth: true
                    spacing: 0
                    QQC2.Label {
                        Layout.fillWidth: true
                        text: hostDelegate.label.length ? hostDelegate.label : hostDelegate.host
                        elide: Text.ElideRight
                    }
                    QQC2.Label {
                        Layout.fillWidth: true
                        text: {
                            var u = hostDelegate.username.length ? hostDelegate.username + "@" : "";
                            return u + hostDelegate.host;
                        }
                        elide: Text.ElideRight
                        font: Kirigami.Theme.smallFont
                        opacity: 0.7
                    }
                }
                QQC2.ToolButton {
                    icon.name: "entry-edit"
                    QQC2.ToolTip.text: i18n("Edit")
                    QQC2.ToolTip.visible: hovered
                    QQC2.ToolTip.delay: Kirigami.Units.toolTipDelay
                    onClicked: hostEditor.openFor(hostDelegate.index)
                }
                QQC2.ToolButton {
                    icon.name: "list-remove"
                    QQC2.ToolTip.text: i18n("Remove")
                    QQC2.ToolTip.visible: hovered
                    QQC2.ToolTip.delay: Kirigami.Units.toolTipDelay
                    onClicked: {
                        var r = hostsModel.get(hostDelegate.index);
                        exe.run(Nas.deletePasswordCmd({ id: r.id, username: r.username }));
                        hostsModel.remove(hostDelegate.index);
                        page.persist();
                    }
                }
            }
        }
    }

    footer: RowLayout {
        Item { Layout.fillWidth: true }
        QQC2.Button {
            text: i18n("Add NAS…")
            icon.name: "list-add"
            onClicked: hostEditor.openFor(-1)
        }
    }

    // --- add / edit dialog ---------------------------------------------------
    Kirigami.Dialog {
        id: hostEditor
        title: editIndex === -1 ? i18n("Add NAS") : i18n("Edit NAS")
        preferredWidth: Kirigami.Units.gridUnit * 24
        standardButtons: Kirigami.Dialog.Ok | Kirigami.Dialog.Cancel

        property int editIndex: -1
        property string editId: ""

        function openFor(index) {
            editIndex = index;
            if (index === -1) {
                editId = "";
                labelField.text = "";
                hostField.text = "";
                userField.text = "";
                passField.text = "";
                domainField.text = "";
                mountRootField.text = "";
                versField.text = "";
            } else {
                var r = hostsModel.get(index);
                editId = r.id;
                labelField.text = r.label;
                hostField.text = r.host;
                userField.text = r.username;
                passField.text = "";
                domainField.text = r.domain;
                mountRootField.text = r.mountRoot;
                versField.text = r.vers;
            }
            open();
        }

        onAccepted: {
            if (hostField.text.trim().length === 0)
                return;
            var host = {
                id: editIndex === -1 ? page.newId() : editId,
                label: labelField.text.trim(),
                host: hostField.text.trim(),
                username: userField.text.trim(),
                domain: domainField.text.trim(),
                mountRoot: mountRootField.text.trim(),
                vers: versField.text.trim()
            };
            if (editIndex === -1)
                hostsModel.append(host);
            else
                hostsModel.set(editIndex, host);
            page.persist();
            // Only touch KWallet when a password was actually entered.
            if (passField.text.length > 0)
                exe.run(Nas.savePasswordCmd(host, passField.text));
            passField.text = "";
        }

        Kirigami.FormLayout {
            QQC2.TextField {
                id: labelField
                Kirigami.FormData.label: i18n("Display name:")
                placeholderText: i18n("e.g. Home NAS (optional)")
            }
            QQC2.TextField {
                id: hostField
                Kirigami.FormData.label: i18n("Host or IP:")
                placeholderText: i18n("e.g. 192.168.1.10 or nas.local")
            }
            QQC2.TextField {
                id: userField
                Kirigami.FormData.label: i18n("Username:")
            }
            Kirigami.PasswordField {
                id: passField
                Kirigami.FormData.label: i18n("Password:")
                placeholderText: hostEditor.editIndex === -1 ? "" : i18n("Leave blank to keep current")
            }
            QQC2.TextField {
                id: domainField
                Kirigami.FormData.label: i18n("Domain:")
                placeholderText: i18n("optional")
            }
            Item { Kirigami.FormData.isSection: true }
            QQC2.TextField {
                id: mountRootField
                Kirigami.FormData.label: i18n("Mount folder override:")
                placeholderText: i18n("optional")
            }
            QQC2.TextField {
                id: versField
                Kirigami.FormData.label: i18n("SMB version override:")
                placeholderText: i18n("optional, e.g. 3.0")
            }
        }
    }
}