// 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
import "components"

FocusScope {
    id: libraryRoot

    property string filterSource: "all"
    property string filterText: ""

    signal gameSelected(var game)
    signal gameFocused(var game)
    signal gameLaunched(var game)
    signal headerFocusRequested()

    readonly property int gameCount: proxyModel.count

    function restoreFocus() {
        if (grid.flickable) {
            grid.flickable.forceActiveFocus()
        } else {
            grid.forceActiveFocus()
        }
    }

    function focusedGame() {
        if (grid.currentIndex < 0) return null
        return proxyModel.get(grid.currentIndex)
    }

    function selectFocused() {
        let g = focusedGame()
        if (g) libraryRoot.gameSelected(g)
    }

    function launchFocused() {
        let g = focusedGame()
        if (g) libraryRoot.gameLaunched(g)
    }

    GameSortFilterModel {
        id: proxyModel
        sourceModel: App.gameModel
        showHidden: libraryRoot.filterSource === "hidden"
        favoritesOnly: libraryRoot.filterSource === "favorites"
        filterSource: {
            if (libraryRoot.filterSource === "all") return ""
            if (libraryRoot.filterSource === "favorites") return ""
            if (libraryRoot.filterSource === "hidden") return ""
            return libraryRoot.filterSource
        }
        filterText: libraryRoot.filterText
    }

    Maui.GridBrowser {
        id: grid
        anchors.fill: parent
        focus: true

        model: proxyModel
        itemSize: Math.max(160, Math.min(App.config.gridSize, 280))
        itemHeight: Math.round(grid.itemSize * 1.5)
        adaptContent: true
        enableLassoSelection: false

        topPadding: 16
        bottomPadding: 24
        leftPadding: 24
        rightPadding: 24

        holder.visible: proxyModel.count === 0 && !App.importing
        holder.emoji: libraryRoot.filterSource === "favorites" ? "starred-symbolic"
                      : "applications-games"
        holder.title: libraryRoot.filterSource === "favorites"
                      ? i18n("No favorites yet")
                      : i18n("Your library is empty")
        holder.body: libraryRoot.filterSource === "favorites"
                     ? i18n("Mark games as favorites to see them here")
                     : i18n("Import games to get started")

        onCurrentIndexChanged: {
            let g = proxyModel.get(currentIndex)
            if (g) libraryRoot.gameFocused(g)
        }

        Component.onCompleted: {
            Qt.callLater(function() {
                let g = proxyModel.get(currentIndex)
                if (g) libraryRoot.gameFocused(g)
            })
        }

        delegate: GameCard {
            game: model.gameObject
            gridActive: grid.flickable ? grid.flickable.activeFocus : grid.activeFocus

            onClicked: {
                grid.currentIndex = index
                libraryRoot.gameSelected(model.gameObject)
            }
            onPlayClicked: {
                grid.currentIndex = index
                libraryRoot.gameLaunched(model.gameObject)
            }
        }

        Keys.onReturnPressed: libraryRoot.selectFocused()
        Keys.onEnterPressed: libraryRoot.selectFocused()
        Keys.onSpacePressed: libraryRoot.selectFocused()

        QQC2.BusyIndicator {
            anchors.centerIn: parent
            running: App.importing
            visible: App.importing
        }

        Connections {
            target: GamepadManager
            function onSelectPressed() {
                if (!grid.flickable || !grid.flickable.activeFocus) return
                libraryRoot.selectFocused()
            }
            function onNavigateUp() {
                if (!grid.flickable || !grid.flickable.activeFocus) return
                let cols = Math.max(1, Math.floor(grid.width / grid.cellWidth))
                if (grid.currentIndex < cols) {
                    libraryRoot.headerFocusRequested()
                    return
                }
                grid.currentIndex = Math.max(0, grid.currentIndex - cols)
            }
            function onNavigateDown() {
                if (!grid.flickable || !grid.flickable.activeFocus) return
                let cols = Math.max(1, Math.floor(grid.width / grid.cellWidth))
                grid.currentIndex = Math.min(proxyModel.count - 1, grid.currentIndex + cols)
            }
            function onNavigateLeft() {
                if (!grid.flickable || !grid.flickable.activeFocus) return
                grid.currentIndex = Math.max(0, grid.currentIndex - 1)
            }
            function onNavigateRight() {
                if (!grid.flickable || !grid.flickable.activeFocus) return
                grid.currentIndex = Math.min(proxyModel.count - 1, grid.currentIndex + 1)
            }
        }
    }
}