// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: 2026 A-La-Karte Contributors

import QtQuick
import QtQuick.Controls as QQC2
import QtQuick.Layouts
import org.mauikit.controls as Maui
import org.kde.alakarte

Item {
    id: root

    property string currentCategory: "all"

    signal categorySelected(string categoryId)

    function selectNext() {
        if (rail.currentIndex < categoryModel.count - 1) {
            rail.currentIndex++
            categorySelected(categoryModel.get(rail.currentIndex).categoryId)
        }
    }

    function selectPrevious() {
        if (rail.currentIndex > 0) {
            rail.currentIndex--
            categorySelected(categoryModel.get(rail.currentIndex).categoryId)
        }
    }

    function _platformIcon(name) {
        let p = (name || "").toLowerCase()
        if (p.includes("steam")) return ":/icons/brand/steam-symbolic.svg"
        if (p.includes("itch")) return ":/icons/brand/itchdotio-symbolic.svg"
        if (p.includes("retroarch")) return ":/icons/brand/retroarch-symbolic.svg"
        if (p.includes("lutris")) return "applications-games"
        if (p.includes("heroic")) return "applications-games"
        if (p.includes("bottles")) return "application-x-executable"
        if (p.includes("flatpak")) return "applications-games"
        if (p.includes("desktop")) return "computer"
        return "applications-games"
    }

    GameSortFilterModel {
        id: allGames
        sourceModel: App.gameModel
        showHidden: false
    }

    ListModel {
        id: categoryModel

        Component.onCompleted: rebuild()

        function rebuild() {
            clear()
            append({ label: i18n("All"), categoryId: "all", iconSource: "view-list-icons" })
            append({ label: i18n("Favorites"), categoryId: "favorites", iconSource: "starred-symbolic" })

            let seen = {}
            for (let i = 0; i < allGames.count; ++i) {
                let g = allGames.get(i)
                if (!g) continue
                let p = g.platform || ""
                if (p && !seen[p]) {
                    seen[p] = true
                    append({ label: p, categoryId: p, iconSource: root._platformIcon(p) })
                }
            }

            for (let j = 0; j < count; ++j) {
                if (get(j).categoryId === root.currentCategory) {
                    rail.currentIndex = j
                    break
                }
            }
        }
    }

    Connections {
        target: App.gameModel
        function onCountChanged() { categoryModel.rebuild() }
    }

    onCurrentCategoryChanged: {
        for (let j = 0; j < categoryModel.count; ++j) {
            if (categoryModel.get(j).categoryId === currentCategory) {
                rail.currentIndex = j
                return
            }
        }
    }

    Rectangle {
        anchors.fill: parent
        color: Qt.rgba(0, 0, 0, 0.55)

        ListView {
            id: rail
            anchors {
                fill: parent
                leftMargin: 24
                rightMargin: 24
            }
            orientation: ListView.Horizontal
            spacing: 8
            clip: true
            model: categoryModel
            keyNavigationEnabled: true
            highlightMoveDuration: 200

            delegate: QQC2.ItemDelegate {
                id: pill
                width: implicitContentWidth + 32
                height: rail.height
                topPadding: 0
                bottomPadding: 0
                leftPadding: 16
                rightPadding: 16

                readonly property bool isCurrent: ListView.isCurrentItem

                background: Rectangle {
                    radius: height / 2
                    color: pill.isCurrent
                           ? Maui.Theme.highlightColor
                           : (pill.hovered ? Qt.rgba(1, 1, 1, 0.12) : Qt.rgba(1, 1, 1, 0.06))
                    border.color: pill.isCurrent ? Maui.Theme.highlightColor : Qt.rgba(1, 1, 1, 0.18)
                    border.width: 1

                    Behavior on color { ColorAnimation { duration: 120 } }
                }

                contentItem: RowLayout {
                    spacing: 6

                    Maui.Icon {
                        source: model.iconSource
                        Layout.preferredWidth: 16
                        Layout.preferredHeight: 16
                        color: "white"
                        opacity: pill.isCurrent ? 1.0 : 0.75
                    }

                    QQC2.Label {
                        text: model.label
                        color: "white"
                        opacity: pill.isCurrent ? 1.0 : 0.75
                        font.pixelSize: 14
                        font.weight: pill.isCurrent ? Font.DemiBold : Font.Normal
                    }
                }

                onClicked: {
                    rail.currentIndex = index
                    root.categorySelected(model.categoryId)
                }
            }
        }
    }
}