// SPDX-FileCopyrightText: 2020 George Florea Bănuș <georgefb899@gmail.com>
// SPDX-FileCopyrightText: 2026 Tri Vo Khac
// SPDX-License-Identifier: GPL-3.0-or-later

import QtQuick
import QtQuick.Controls
import org.kde.ki18n
import org.kde.kirigami as Kirigami

// The video, with Haruna's default mouse bindings and drag and drop.
MpvItem {
    id: root

    required property Actions actions
    property bool fullscreen: false

    signal pointerMoved(x: real, y: real)
    signal pointerLeft()
    // Files dropped on the top part are queued; on the bottom part they play now.
    signal filesDropped(urls: list<url>, append: bool)
    signal subtitleDropped(url: url)

    function isSubtitleFile(url: url): bool {
        return /\.(srt|ass|ssa|vtt|sub|sup)$/i.test(url.toString())
    }

    // Plain-text and translated subtitles; styled ASS subtitles keep their own fonts.
    function applySubtitleStyle() {
        setPropertyAsync("sub-font-size", QtPotatoSettings.subtitleFontSize)
        setPropertyAsync("sub-outline-size", QtPotatoSettings.subtitleOutlineSize)
    }

    Kirigami.Theme.colorSet: Kirigami.Theme.Complementary
    Kirigami.Theme.inherit: false

    loadUserConfig: QtPotatoSettings.loadMpvConfig
    preferredAudioLanguages: QtPotatoSettings.preferredAudioLanguages
    preferredSubtitleLanguages: QtPotatoSettings.preferredSubtitleLanguages
    autoSelectSubtitle: QtPotatoSettings.autoSelectSubtitle

    // Set once the saved volume is applied; mpv reports its default volume before that.
    property bool volumeRestored: false

    // QtPotato's own settings win over mpv.conf.
    onUserConfigApplied: {
        applySubtitleStyle()
        volume = QtPotatoSettings.volume
        volumeRestored = true
    }

    onVolumeChanged: {
        if (volumeRestored) {
            QtPotatoSettings.volume = volume
        }
    }

    readonly property int subtitleFontSize: QtPotatoSettings.subtitleFontSize
    onSubtitleFontSizeChanged: applySubtitleStyle()
    readonly property int subtitleOutlineSize: QtPotatoSettings.subtitleOutlineSize
    onSubtitleOutlineSizeChanged: applySubtitleStyle()

    Rectangle {
        anchors.fill: parent
        color: Kirigami.Theme.backgroundColor
        visible: !root.fileLoaded
        z: -1
    }

    Kirigami.PlaceholderMessage {
        anchors.centerIn: parent
        width: parent.width - Kirigami.Units.gridUnit * 4
        visible: !root.fileLoaded && !dropArea.containsDrag
        icon.name: "video-symbolic"
        text: KI18n.i18nc("@info:placeholder", "No video open")
        explanation: KI18n.i18nc("@info:placeholder", "Open a file or drop one here")
    }

    Timer {
        id: hideCursorTimer
        running: root.fullscreen && mouseArea.containsMouse
        repeat: true
        interval: 2000
        onTriggered: mouseArea.hideCursor = true
    }

    MouseArea {
        id: mouseArea

        property bool hideCursor: false

        anchors.fill: parent
        acceptedButtons: Qt.LeftButton | Qt.RightButton | Qt.MiddleButton | Qt.ForwardButton | Qt.BackButton
        hoverEnabled: true
        cursorShape: hideCursor && root.fullscreen ? Qt.BlankCursor : Qt.ArrowCursor

        onPositionChanged: mouse => {
            hideCursor = false
            hideCursorTimer.restart()
            root.pointerMoved(mouse.x, mouse.y)
        }
        onExited: root.pointerLeft()

        onPressed: mouse => {
            root.forceActiveFocus(Qt.MouseFocusReason)
            switch (mouse.button) {
            case Qt.LeftButton:
                root.actions.playPause.trigger()
                break
            case Qt.MiddleButton:
                root.actions.mute.trigger()
                break
            case Qt.RightButton:
                root.actions.openContextMenu.trigger()
                break
            case Qt.ForwardButton:
                root.actions.seekForwardSmall.trigger()
                break
            case Qt.BackButton:
                root.actions.seekBackwardSmall.trigger()
                break
            }
        }

        onDoubleClicked: mouse => {
            if (mouse.button === Qt.LeftButton) {
                // Both presses of the double click toggled playback, so it is unchanged.
                root.actions.toggleFullscreen.trigger()
            } else if (mouse.button === Qt.MiddleButton) {
                root.actions.configure.trigger()
            }
        }

        onWheel: wheel => {
            if (wheel.angleDelta.y > 0) {
                root.actions.volumeUp.trigger()
            } else if (wheel.angleDelta.y < 0) {
                root.actions.volumeDown.trigger()
            }
        }
    }

    DropArea {
        id: dropArea

        readonly property bool onTopPart: containsDrag && drag.y <= height * 0.25
        property bool onlySubtitles: false

        anchors.fill: parent
        keys: ["text/uri-list"]

        onEntered: drag => {
            onlySubtitles = drag.urls.length > 0 && drag.urls.every(url => root.isSubtitleFile(url))
        }

        onDropped: drop => {
            if (!drop.hasUrls) {
                return
            }
            if (onlySubtitles) {
                root.subtitleDropped(drop.urls[0])
            } else {
                root.filesDropped(drop.urls, onTopPart)
            }
        }

        Repeater {
            model: dropArea.containsDrag && !dropArea.onlySubtitles ? 2 : 0
            delegate: Rectangle {
                id: dropZone

                required property int index
                readonly property bool isTop: index === 0
                readonly property bool active: isTop === dropArea.onTopPart

                x: Kirigami.Units.smallSpacing
                y: isTop ? Kirigami.Units.smallSpacing : dropArea.height * 0.25 + Kirigami.Units.smallSpacing
                width: dropArea.width - Kirigami.Units.smallSpacing * 2
                height: (isTop ? dropArea.height * 0.25 : dropArea.height * 0.75) - Kirigami.Units.smallSpacing * 2
                color: "transparent"
                radius: Kirigami.Units.cornerRadius
                border.color: active ? Kirigami.Theme.activeTextColor : "transparent"
                border.width: active ? 3 : 0

                Label {
                    anchors.fill: parent
                    text: dropZone.isTop
                          ? KI18n.i18nc("@info:drag&drop append items", "Add to Playlist")
                          : KI18n.i18nc("@info:drag&drop play now", "Play Now")
                    elide: Text.ElideRight
                    color: "white"
                    style: Text.Outline
                    styleColor: "black"
                    opacity: dropZone.active ? 1 : 0.7
                    font.pointSize: Kirigami.Theme.defaultFont.pointSize * (dropZone.isTop ? 1.6 : 2.2)
                    font.bold: true
                    horizontalAlignment: Qt.AlignHCenter
                    verticalAlignment: Qt.AlignVCenter
                }
            }
        }
    }
}