import QtQuick
import QtQuick.Layouts
import Quickshell.Wayland
import qs.Common
import qs.Modules.ProcessList
import qs.Services
import qs.Widgets
import "../Common/Format.js" as Format

DankFloatingWindow {
    id: processListModal
    readonly property var log: Log.scoped("ProcessListModal")

    property int currentTab: 0
    property string searchText: ""
    property string expandedPid: ""
    property bool shouldHaveFocus: visible
    readonly property alias modalFocusScope: contentFocusScope
    property alias shouldBeVisible: processListModal.visible

    signal closingModal

    function show() {
        if (!DgopService.dgopAvailable) {
            log.warn("dgop is not available");
            return;
        }
        visible = true;
    }

    function hide() {
        visible = false;
        processContextMenu.dismiss();
    }

    function toggle() {
        if (!DgopService.dgopAvailable) {
            log.warn("dgop is not available");
            return;
        }
        visible = !visible;
    }

    function focusOrToggle() {
        if (!DgopService.dgopAvailable) {
            log.warn("dgop is not available");
            return;
        }
        if (!visible) {
            show();
            return;
        }
        const modalTitle = I18n.tr("System Monitor", "sysmon window title");
        for (const toplevel of ToplevelManager.toplevels.values) {
            if (toplevel.title !== "System Monitor" && toplevel.title !== modalTitle)
                continue;
            if (toplevel.activated) {
                hide();
                return;
            }
            toplevel.activate();
            return;
        }
        hide();
        show();
    }

    function nextTab() {
        currentTab = (currentTab + 1) % 4;
    }

    function previousTab() {
        currentTab = (currentTab - 1 + 4) % 4;
    }

    objectName: "processListModal"
    title: I18n.tr("System Monitor", "sysmon window title")
    minimumSize: Qt.size(Math.min(Math.round(Theme.fontSizeMedium * 48), Screen.width), Math.min(Math.round(Theme.fontSizeMedium * 34), Screen.height))
    implicitWidth: Math.round(Theme.fontSizeMedium * 71)
    implicitHeight: ProcessListMetrics.windowHeight
    visible: false

    Ref {
        service: DgopService
        modules: ["cpu", "memory", "network", "disk", "system", "gpu"]
        active: processListModal.visible
    }

    onClosed: hide()

    onCurrentTabChanged: {
        if (visible && currentTab === 0 && searchField.visible && !viewNavigation.activeFocus)
            searchField.forceActiveFocus();
    }

    onVisibleChanged: {
        if (!visible) {
            processContextMenu.dismiss();
            closingModal();
            searchText = "";
            expandedPid = "";
            if (processesTabLoader.item)
                processesTabLoader.item.reset();
        } else {
            Qt.callLater(() => {
                if (currentTab === 0 && searchField.visible)
                    searchField.forceActiveFocus();
                else if (contentFocusScope)
                    contentFocusScope.forceActiveFocus();
            });
        }
    }

    ProcessContextMenu {
        id: processContextMenu
        parentFocusItem: contentFocusScope
    }

    FocusScope {
        id: contentFocusScope

        LayoutMirroring.enabled: I18n.isRtl
        LayoutMirroring.childrenInherit: true

        anchors.fill: parent
        focus: true

        Keys.onPressed: event => {
            if (processContextMenu.visible || processContextMenu.confirmationOpen)
                return;

            switch (event.key) {
            case Qt.Key_1:
            case Qt.Key_2:
            case Qt.Key_3:
            case Qt.Key_4:
                if (searchField.getActiveFocus())
                    return;
                currentTab = event.key - Qt.Key_1;
                event.accepted = true;
                return;
            case Qt.Key_Escape:
                hide();
                event.accepted = true;
                return;
            case Qt.Key_F:
                if (event.modifiers & Qt.ControlModifier) {
                    searchField.forceActiveFocus();
                    event.accepted = true;
                    return;
                }
                break;
            }

            if (currentTab === 0 && processesTabLoader.item)
                processesTabLoader.item.handleKey(event);
        }

        Rectangle {
            anchors.centerIn: parent
            width: 400
            height: 200
            radius: Theme.cornerRadius
            color: Theme.errorHover
            border.color: Theme.error
            border.width: Theme.outlineWidthFocused
            visible: !DgopService.dgopAvailable

            Column {
                anchors.centerIn: parent
                spacing: Theme.spacingL

                DankIcon {
                    name: "error"
                    size: 48
                    color: Theme.error
                    anchors.horizontalCenter: parent.horizontalCenter
                }

                StyledText {
                    text: I18n.tr("System Monitor Unavailable")
                    font.pixelSize: Theme.fontSizeLarge
                    font.weight: Theme.fontWeightMedium
                    color: Theme.error
                    anchors.horizontalCenter: parent.horizontalCenter
                }

                StyledText {
                    text: I18n.tr("DMS_SOCKET not available")
                    font.pixelSize: Theme.fontSizeMedium
                    color: Theme.surfaceText
                    anchors.horizontalCenter: parent.horizontalCenter
                    horizontalAlignment: Text.AlignHCenter
                    wrapMode: Text.WordWrap
                }
            }
        }

        ColumnLayout {
            anchors.fill: parent
            spacing: 0
            visible: DgopService.dgopAvailable

            DankWindowHeader {
                Layout.fillWidth: true
                controls: windowControls
                title: I18n.tr("System Monitor")
                onCloseRequested: processListModal.hide()
            }

            DankNavigationBar {
                id: viewNavigation
                Layout.fillWidth: true
                Layout.topMargin: Theme.spacingS
                Layout.leftMargin: Theme.spacingL
                Layout.rightMargin: Theme.spacingL
                nextFocusTarget: currentTab === 0 ? searchField : null
                model: [
                    {
                        text: I18n.tr("Processes"),
                        icon: "list_alt"
                    },
                    {
                        text: I18n.tr("Performance"),
                        icon: "monitoring"
                    },
                    {
                        text: I18n.tr("Disks", "process list window tab name"),
                        icon: "storage"
                    },
                    {
                        text: I18n.tr("System", "noun, tab name, process filter and app category"),
                        icon: "computer"
                    }
                ]
                currentIndex: processListModal.currentTab
                onActivated: index => processListModal.currentTab = index
            }

            ProcessSummary {
                Layout.fillWidth: true
                Layout.fillHeight: false
                Layout.leftMargin: Theme.spacingL
                Layout.rightMargin: Theme.spacingL
                Layout.topMargin: Theme.spacingS
                visible: currentTab === 0
            }

            RowLayout {
                Layout.fillWidth: true
                Layout.leftMargin: Theme.spacingL
                Layout.rightMargin: Theme.spacingL
                Layout.topMargin: Theme.spacingS
                spacing: Theme.spacingM
                visible: currentTab === 0

                DankSearchField {
                    id: searchField
                    Layout.fillWidth: true
                    Layout.preferredHeight: Theme.buttonHeightS
                    placeholderText: I18n.tr("Search processes...", "process search placeholder")
                    text: processListModal.searchText
                    onTextChanged: processListModal.searchText = text
                    ignoreUpDownKeys: true
                    keyForwardTargets: [contentFocusScope]
                    KeyNavigation.backtab: viewNavigation
                }

                ProcessFilterChips {
                    id: processFilterGroup
                    Layout.preferredWidth: singleRowWidth
                }
            }

            Rectangle {
                Layout.fillWidth: true
                Layout.fillHeight: true
                Layout.margins: Theme.spacingL
                Layout.topMargin: Theme.spacingS
                Layout.bottomMargin: Theme.spacingS
                radius: Theme.cornerRadius
                color: "transparent"
                clip: true
                readonly property bool isFloatingWindowSurface: true

                Loader {
                    id: processesTabLoader
                    anchors.fill: parent
                    active: processListModal.visible
                    visible: currentTab === 0
                    sourceComponent: ProcessesView {
                        searchText: processListModal.searchText
                        expandedPid: processListModal.expandedPid
                        contextMenu: processContextMenu
                        onExpandedPidChanged: processListModal.expandedPid = expandedPid
                    }
                }

                Loader {
                    id: performanceTabLoader
                    anchors.fill: parent
                    anchors.margins: Theme.spacingS
                    active: processListModal.visible
                    visible: currentTab === 1
                    sourceComponent: PerformanceView {}
                }

                Loader {
                    id: disksTabLoader
                    anchors.fill: parent
                    anchors.margins: Theme.spacingS
                    active: processListModal.visible
                    visible: currentTab === 2
                    sourceComponent: DisksView {}
                }

                Loader {
                    id: systemTabLoader
                    anchors.fill: parent
                    anchors.margins: Theme.spacingS
                    active: processListModal.visible
                    visible: currentTab === 3
                    sourceComponent: SystemView {}
                }
            }

            Rectangle {
                Layout.fillWidth: true
                Layout.preferredHeight: Theme.buttonHeightXS
                Layout.leftMargin: Theme.spacingL
                Layout.rightMargin: Theme.spacingL
                Layout.bottomMargin: Theme.spacingM
                color: "transparent"

                Row {
                    anchors.right: parent.right
                    anchors.verticalCenter: parent.verticalCenter
                    spacing: Theme.spacingL

                    Row {
                        spacing: Theme.spacingXS

                        DankIcon {
                            name: "swap_horiz"
                            size: Theme.iconSizeSmall
                            color: Theme.info
                            anchors.verticalCenter: parent.verticalCenter
                        }

                        StyledText {
                            text: "↓" + Format.formatRate(DgopService.networkRxRate) + " ↑" + Format.formatRate(DgopService.networkTxRate)
                            font.pixelSize: Theme.fontSizeSmall
                            font.family: SettingsData.monoFontFamily
                            color: Theme.surfaceText
                        }
                    }

                    Row {
                        spacing: Theme.spacingXS

                        DankIcon {
                            name: "storage"
                            size: Theme.iconSizeSmall
                            color: Theme.warning
                            anchors.verticalCenter: parent.verticalCenter
                        }

                        StyledText {
                            text: "↓" + Format.formatRate(DgopService.diskReadRate) + " ↑" + Format.formatRate(DgopService.diskWriteRate)
                            font.pixelSize: Theme.fontSizeSmall
                            font.family: SettingsData.monoFontFamily
                            color: Theme.surfaceText
                        }
                    }

                    Row {
                        spacing: Theme.spacingXS

                        DankIcon {
                            name: "memory"
                            size: Theme.iconSizeSmall
                            color: Theme.primary
                            anchors.verticalCenter: parent.verticalCenter
                        }

                        StyledText {
                            text: DgopService.cpuUsage.toFixed(1) + "%"
                            font.pixelSize: Theme.fontSizeSmall
                            font.family: SettingsData.monoFontFamily
                            font.weight: Theme.fontWeightMedium
                            color: DgopService.cpuUsage > 80 ? Theme.error : Theme.surfaceText
                        }
                    }

                    Row {
                        spacing: Theme.spacingXS

                        DankIcon {
                            name: "sd_card"
                            size: Theme.iconSizeSmall
                            color: Theme.secondary
                            anchors.verticalCenter: parent.verticalCenter
                        }

                        StyledText {
                            text: DgopService.formatSystemMemory(DgopService.usedMemoryKB) + " / " + DgopService.formatSystemMemory(DgopService.totalMemoryKB)
                            font.pixelSize: Theme.fontSizeSmall
                            font.family: SettingsData.monoFontFamily
                            font.weight: Theme.fontWeightMedium
                            color: DgopService.memoryUsage > 90 ? Theme.error : Theme.surfaceText
                        }
                    }
                }
            }
        }
    }

    FloatingWindowControls {
        id: windowControls
        targetWindow: processListModal
    }
}