import QtQuick
import QtQuick.Controls
import qs.Common
import qs.Modals.Common
import qs.Widgets

DankModal {
    id: root

    property var allWidgets: []
    property string targetSection: ""
    property string searchQuery: ""
    property var filteredWidgets: []
    property int selectedIndex: -1
    property bool keyboardNavigationActive: false
    property Component widgetSelectionContent
    property var parentModal: null

    signal widgetSelected(string widgetId, string targetSection)

    function updateFilteredWidgets() {
        if (!searchQuery || searchQuery.length === 0) {
            filteredWidgets = allWidgets.slice()
            return
        }

        var filtered = []
        var query = searchQuery.toLowerCase()

        for (var i = 0; i < allWidgets.length; i++) {
            var widget = allWidgets[i]
            var text = widget.text ? widget.text.toLowerCase() : ""
            var description = widget.description ? widget.description.toLowerCase() : ""
            var id = widget.id ? widget.id.toLowerCase() : ""

            if (text.indexOf(query) !== -1 ||
                description.indexOf(query) !== -1 ||
                id.indexOf(query) !== -1) {
                filtered.push(widget)
            }
        }

        filteredWidgets = filtered
        selectedIndex = -1
        keyboardNavigationActive = false
    }

    onAllWidgetsChanged: {
        updateFilteredWidgets()
    }

    function selectNext() {
        if (filteredWidgets.length === 0) return
        keyboardNavigationActive = true
        selectedIndex = Math.min(selectedIndex + 1, filteredWidgets.length - 1)
    }

    function selectPrevious() {
        if (filteredWidgets.length === 0) return
        keyboardNavigationActive = true
        selectedIndex = Math.max(selectedIndex - 1, -1)
        if (selectedIndex === -1) {
            keyboardNavigationActive = false
        }
    }

    function selectWidget() {
        if (selectedIndex >= 0 && selectedIndex < filteredWidgets.length) {
            var widget = filteredWidgets[selectedIndex]
            root.widgetSelected(widget.id, root.targetSection)
            root.close()
        }
    }

    function show() {
        if (parentModal) {
            parentModal.shouldHaveFocus = false
        }
        open()
        Qt.callLater(() => {
            if (contentLoader.item && contentLoader.item.searchField) {
                contentLoader.item.searchField.forceActiveFocus()
            }
        })
    }

    function hide() {
        close()
        if (parentModal) {
            parentModal.shouldHaveFocus = Qt.binding(() => {
                return parentModal.shouldBeVisible
            })
        }
    }

    width: 500
    height: 550
    allowStacking: true
    backgroundOpacity: 0
    closeOnEscapeKey: false
    onDialogClosed: () => {
        allWidgets = []
        targetSection = ""
        searchQuery = ""
        filteredWidgets = []
        selectedIndex = -1
        keyboardNavigationActive = false
    }
    onBackgroundClicked: () => {
        return hide()
    }
    content: widgetSelectionContent

    widgetSelectionContent: Component {
        FocusScope {
        id: widgetKeyHandler
        property alias searchField: searchField

        anchors.fill: parent
        focus: true

        Keys.onPressed: event => {
            if (event.key === Qt.Key_Escape) {
                root.close()
                event.accepted = true
            } else if (event.key === Qt.Key_Down) {
                root.selectNext()
                event.accepted = true
            } else if (event.key === Qt.Key_Up) {
                root.selectPrevious()
                event.accepted = true
            } else if (event.key === Qt.Key_N && event.modifiers & Qt.ControlModifier) {
                root.selectNext()
                event.accepted = true
            } else if (event.key === Qt.Key_P && event.modifiers & Qt.ControlModifier) {
                root.selectPrevious()
                event.accepted = true
            } else if (event.key === Qt.Key_J && event.modifiers & Qt.ControlModifier) {
                root.selectNext()
                event.accepted = true
            } else if (event.key === Qt.Key_K && event.modifiers & Qt.ControlModifier) {
                root.selectPrevious()
                event.accepted = true
            } else if (event.key === Qt.Key_Return || event.key === Qt.Key_Enter) {
                if (root.keyboardNavigationActive) {
                    root.selectWidget()
                } else if (root.filteredWidgets.length > 0) {
                    var firstWidget = root.filteredWidgets[0]
                    root.widgetSelected(firstWidget.id, root.targetSection)
                    root.close()
                }
                event.accepted = true
            } else if (!searchField.activeFocus && event.text && event.text.length > 0 && event.text.match(/[a-zA-Z0-9\s]/)) {
                searchField.forceActiveFocus()
                searchField.insertText(event.text)
                event.accepted = true
            }
        }

        DankActionButton {
            iconName: "close"
            iconSize: Theme.iconSize - 2
            iconColor: Theme.outline
            anchors.top: parent.top
            anchors.topMargin: Theme.spacingM
            anchors.right: parent.right
            anchors.rightMargin: Theme.spacingM
            onClicked: root.close()
        }

        Column {
            id: contentColumn

            spacing: Theme.spacingM
            anchors.fill: parent
            anchors.margins: Theme.spacingL
            anchors.topMargin: Theme.spacingL + 30 // Space for close button

            Row {
                width: parent.width
                spacing: Theme.spacingM

                DankIcon {
                    name: "add_circle"
                    size: Theme.iconSize
                    color: Theme.primary
                    anchors.verticalCenter: parent.verticalCenter
                }

                StyledText {
                    text: qsTr("Add Widget to ") + root.targetSection + " Section"
                    font.pixelSize: Theme.fontSizeLarge
                    font.weight: Font.Medium
                    color: Theme.surfaceText
                    anchors.verticalCenter: parent.verticalCenter
                }
            }

            StyledText {
                text: qsTr("Select a widget to add to the ") + root.targetSection.toLowerCase(
                          ) + " section of the top bar. You can add multiple instances of the same widget if needed."
                font.pixelSize: Theme.fontSizeSmall
                color: Theme.outline
                width: parent.width
                wrapMode: Text.WordWrap
            }

            DankTextField {
                id: searchField
                width: parent.width
                height: 48
                cornerRadius: Theme.cornerRadius
                backgroundColor: Theme.surfaceContainerHigh
                normalBorderColor: Theme.outlineMedium
                focusedBorderColor: Theme.primary
                leftIconName: "search"
                leftIconSize: Theme.iconSize
                leftIconColor: Theme.surfaceVariantText
                leftIconFocusedColor: Theme.primary
                showClearButton: true
                textColor: Theme.surfaceText
                font.pixelSize: Theme.fontSizeMedium
                placeholderText: ""
                text: root.searchQuery
                focus: true
                ignoreLeftRightKeys: true
                keyForwardTargets: [widgetKeyHandler]
                onTextEdited: {
                    root.searchQuery = text
                    updateFilteredWidgets()
                }
                Keys.onPressed: event => {
                    if (event.key === Qt.Key_Escape) {
                        root.close()
                        event.accepted = true
                    } else if (event.key === Qt.Key_Down || event.key === Qt.Key_Up ||
                               ((event.key === Qt.Key_Return || event.key === Qt.Key_Enter) && text.length === 0)) {
                        event.accepted = false
                    }
                }
            }

            DankListView {
                id: widgetList

                width: parent.width
                height: parent.height - y
                spacing: Theme.spacingS
                model: root.filteredWidgets
                clip: true

                delegate: Rectangle {
                    width: widgetList.width
                    height: 60
                    radius: Theme.cornerRadius
                    property bool isSelected: root.keyboardNavigationActive && index === root.selectedIndex
                    color: isSelected ? Theme.primarySelected : 
                           widgetArea.containsMouse ? Theme.primaryHover : Qt.rgba(
                                                            Theme.surfaceVariant.r,
                                                            Theme.surfaceVariant.g,
                                                            Theme.surfaceVariant.b,
                                                            0.3)
                    border.color: isSelected ? Theme.primary : Qt.rgba(Theme.outline.r, Theme.outline.g,
                                            Theme.outline.b, 0.2)
                    border.width: isSelected ? 2 : 1

                    Row {
                        anchors.fill: parent
                        anchors.margins: Theme.spacingM
                        spacing: Theme.spacingM

                        DankIcon {
                            name: modelData.icon
                            size: Theme.iconSize
                            color: Theme.primary
                            anchors.verticalCenter: parent.verticalCenter
                        }

                        Column {
                            anchors.verticalCenter: parent.verticalCenter
                            spacing: 2
                            width: parent.width - Theme.iconSize - Theme.spacingM * 3

                            StyledText {
                                text: modelData.text
                                font.pixelSize: Theme.fontSizeMedium
                                font.weight: Font.Medium
                                color: Theme.surfaceText
                                elide: Text.ElideRight
                                width: parent.width
                            }

                            StyledText {
                                text: modelData.description
                                font.pixelSize: Theme.fontSizeSmall
                                color: Theme.outline
                                elide: Text.ElideRight
                                width: parent.width
                                wrapMode: Text.WordWrap
                            }
                        }

                        DankIcon {
                            name: "add"
                            size: Theme.iconSize - 4
                            color: Theme.primary
                            anchors.verticalCenter: parent.verticalCenter
                        }
                    }

                    MouseArea {
                        id: widgetArea

                        anchors.fill: parent
                        hoverEnabled: true
                        cursorShape: Qt.PointingHandCursor
                        onClicked: {
                            root.widgetSelected(modelData.id,
                                                root.targetSection)
                            root.close()
                        }
                    }

                    Behavior on color {
                        ColorAnimation {
                            duration: Theme.shortDuration
                            easing.type: Theme.standardEasing
                        }
                    }
                }
            }
        }
        }
    }
}