( function () {
    var el                 = wp.element.createElement;
    var useState           = wp.element.useState;
    var Fragment           = wp.element.Fragment;
    var registerBlockType  = wp.blocks.registerBlockType;
    var __                 = wp.i18n.__;
    var InspectorControls  = wp.blockEditor.InspectorControls;
    var PanelColorSettings = wp.blockEditor.PanelColorSettings;
    var useBlockProps      = wp.blockEditor.useBlockProps;
    var PanelBody          = wp.components.PanelBody;
    var RangeControl       = wp.components.RangeControl;
    var SelectControl      = wp.components.SelectControl;
    var TextControl        = wp.components.TextControl;
    var ToggleControl      = wp.components.ToggleControl;
    var Button             = wp.components.Button;

    var _flTC, _flTV;
    function _tc() { return _flTC || (_flTC = window.bkbgTypographyControl); }
    function _tv() { return _flTV || (_flTV = window.bkbgTypoCssVars); }

    var DEFAULT_CARDS = [
        { id: '1', front: 'What is the capital of France?', back: 'Paris', known: false },
        { id: '2', front: 'What is 7 × 8?', back: '56', known: false },
        { id: '3', front: 'Who wrote Romeo and Juliet?', back: 'William Shakespeare', known: false },
        { id: '4', front: 'What is H₂O?', back: 'Water', known: false },
        { id: '5', front: 'What year did WWII end?', back: '1945', known: false }
    ];

    registerBlockType('blockenberg/flashcard', {
        edit: function (props) {
            var a = props.attributes;
            var setAttributes = props.setAttributes;
            var wrapStyle = Object.assign({},
                _tv()(a.typoTitle, '--bkbg-flash-tt-'),
                _tv()(a.typoSubtitle, '--bkbg-flash-ts-'),
                _tv()(a.typoCard, '--bkbg-flash-tc-')
            );
            var blockProps = useBlockProps({ className: 'bkbg-fc-editor-wrap', style: wrapStyle });

            var cards;
            try { cards = JSON.parse(a.cards); } catch (e) { cards = DEFAULT_CARDS; }

            var containerStyle = {
                background: a.sectionBg,
                borderRadius: '12px',
                padding: '28px',
                maxWidth: a.contentMaxWidth + 'px',
                margin: '0 auto'
            };

            var cardPreviewStyle = {
                background: a.cardFrontBg,
                borderRadius: '12px',
                height: a.cardHeight + 'px',
                display: 'flex',
                alignItems: 'center',
                justifyContent: 'center',
                textAlign: 'center',
                padding: '24px',
                boxShadow: '0 8px 32px rgba(99,102,241,0.15)',
                color: a.labelColor,
                cursor: 'pointer',
                position: 'relative'
            };

            function addCard() {
                var newCards = cards.concat([{ id: Date.now().toString(), front: 'New question', back: 'Answer', known: false }]);
                setAttributes({ cards: JSON.stringify(newCards) });
            }

            function removeCard(id) {
                setAttributes({ cards: JSON.stringify(cards.filter(function (c) { return c.id !== id; })) });
            }

            function updateCard(id, field, value) {
                var updated = cards.map(function (c) {
                    if (c.id !== id) return c;
                    var n = {}; Object.keys(c).forEach(function (k) { n[k] = c[k]; }); n[field] = value; return n;
                });
                setAttributes({ cards: JSON.stringify(updated) });
            }

            return el(
                Fragment,
                null,
                el(
                    InspectorControls,
                    null,
                    el(
                        PanelBody,
                        { title: __('Content', 'blockenberg'), initialOpen: true },
                        el(TextControl, {
                            label: __('Title', 'blockenberg'),
                            value: a.title,
                            onChange: function (v) { setAttributes({ title: v }); }
                        }),
                        el(TextControl, {
                            label: __('Subtitle', 'blockenberg'),
                            value: a.subtitle,
                            onChange: function (v) { setAttributes({ subtitle: v }); }
                        }),
                        el(ToggleControl, {
                            label: __('Show Title', 'blockenberg'),
                            checked: a.showTitle,
                            onChange: function (v) { setAttributes({ showTitle: v }); },
                            __nextHasNoMarginBottom: true
                        }),
                        el(ToggleControl, {
                            label: __('Show Subtitle', 'blockenberg'),
                            checked: a.showSubtitle,
                            onChange: function (v) { setAttributes({ showSubtitle: v }); },
                            __nextHasNoMarginBottom: true
                        })
                    ),
                    el(
                        PanelBody,
                        { title: __('Cards', 'blockenberg'), initialOpen: true },
                        cards.map(function (card) {
                            return el(
                                'div',
                                { key: card.id, style: { background: '#f9f9f9', borderRadius: '8px', padding: '12px', marginBottom: '10px', border: '1px solid #e5e7eb' } },
                                el(TextControl, {
                                    label: __('Front', 'blockenberg'),
                                    value: card.front,
                                    onChange: function (v) { updateCard(card.id, 'front', v); }
                                }),
                                el(TextControl, {
                                    label: __('Back', 'blockenberg'),
                                    value: card.back,
                                    onChange: function (v) { updateCard(card.id, 'back', v); }
                                }),
                                el(
                                    'button',
                                    {
                                        style: { background: '#fee2e2', color: '#991b1b', border: 'none', borderRadius: '4px', padding: '4px 10px', cursor: 'pointer', fontSize: '12px' },
                                        onClick: function () { removeCard(card.id); }
                                    },
                                    __('Remove', 'blockenberg')
                                )
                            );
                        }),
                        el(
                            'button',
                            {
                                style: { background: a.accentColor, color: '#fff', border: 'none', borderRadius: '6px', padding: '8px 16px', cursor: 'pointer', width: '100%', fontWeight: '600' },
                                onClick: addCard
                            },
                            __('+ Add Card', 'blockenberg')
                        )
                    ),
                    el(
                        PanelBody,
                        { title: __('Options', 'blockenberg'), initialOpen: false },
                        el(ToggleControl, {
                            label: __('Show Progress Bar', 'blockenberg'),
                            checked: a.showProgress,
                            onChange: function (v) { setAttributes({ showProgress: v }); },
                            __nextHasNoMarginBottom: true
                        }),
                        el(ToggleControl, {
                            label: __('Show Shuffle Button', 'blockenberg'),
                            checked: a.showShuffleBtn,
                            onChange: function (v) { setAttributes({ showShuffleBtn: v }); },
                            __nextHasNoMarginBottom: true
                        }),
                        el(ToggleControl, {
                            label: __('Show "Mark Known" Button', 'blockenberg'),
                            checked: a.showKnownBtn,
                            onChange: function (v) { setAttributes({ showKnownBtn: v }); },
                            __nextHasNoMarginBottom: true
                        }),
                        el(ToggleControl, {
                            label: __('Show Keyboard Hint', 'blockenberg'),
                            checked: a.showKeyboardHint,
                            onChange: function (v) { setAttributes({ showKeyboardHint: v }); },
                            __nextHasNoMarginBottom: true
                        }),
                        el(RangeControl, {
                            label: __('Card Height (px)', 'blockenberg'),
                            value: a.cardHeight,
                            min: 120,
                            max: 500,
                            onChange: function (v) { setAttributes({ cardHeight: v }); }
                        })
                    ),
                    el(
                        PanelBody,
                        { title: __('Typography', 'blockenberg'), initialOpen: false },
                        _tc() && _tc()({ label: __('Title', 'blockenberg'), typo: a.typoTitle, onChange: function (v) { setAttributes({ typoTitle: v }); } }),
                        _tc() && _tc()({ label: __('Subtitle', 'blockenberg'), typo: a.typoSubtitle, onChange: function (v) { setAttributes({ typoSubtitle: v }); } }),
                        _tc() && _tc()({ label: __('Card Text', 'blockenberg'), typo: a.typoCard, onChange: function (v) { setAttributes({ typoCard: v }); } })
                    ),
                    el(
                        PanelBody,
                        { title: __('Appearance', 'blockenberg'), initialOpen: false },
                        el(RangeControl, {
                            label: __('Max Width (px)', 'blockenberg'),
                            value: a.contentMaxWidth,
                            min: 320,
                            max: 1200,
                            onChange: function (v) { setAttributes({ contentMaxWidth: v }); }
                        })
                    ),
                    el(
                        PanelColorSettings,
                        {
                            title: __('Colors', 'blockenberg'),
                            initialOpen: false,
                            colorSettings: [
                                { value: a.accentColor,   onChange: function (v) { setAttributes({ accentColor: v || '#6366f1' }); },   label: __('Accent Color', 'blockenberg') },
                                { value: a.cardFrontBg,   onChange: function (v) { setAttributes({ cardFrontBg: v || '#ffffff' }); },   label: __('Card Front Background', 'blockenberg') },
                                { value: a.cardBackBg,    onChange: function (v) { setAttributes({ cardBackBg: v || '#4f46e5' }); },    label: __('Card Back Background', 'blockenberg') },
                                { value: a.cardBackColor, onChange: function (v) { setAttributes({ cardBackColor: v || '#ffffff' }); }, label: __('Card Back Text', 'blockenberg') },
                                { value: a.knownColor,    onChange: function (v) { setAttributes({ knownColor: v || '#22c55e' }); },    label: __('Known Color', 'blockenberg') },
                                { value: a.sectionBg,     onChange: function (v) { setAttributes({ sectionBg: v || '#f5f3ff' }); },     label: __('Section Background', 'blockenberg') },
                                { value: a.cardBg,        onChange: function (v) { setAttributes({ cardBg: v || '#ffffff' }); },        label: __('Controls Background', 'blockenberg') },
                                { value: a.titleColor,    onChange: function (v) { setAttributes({ titleColor: v || '#3730a3' }); },    label: __('Title Color', 'blockenberg') },
                                { value: a.subtitleColor, onChange: function (v) { setAttributes({ subtitleColor: v || '#6b7280' }); }, label: __('Subtitle Color', 'blockenberg') },
                                { value: a.labelColor,    onChange: function (v) { setAttributes({ labelColor: v || '#374151' }); },    label: __('Label Color', 'blockenberg') }
                            ]
                        }
                    )
                ),
                el(
                    'div',
                    blockProps,
                    el(
                        'div',
                        { style: containerStyle },
                        a.showTitle && el('div', {
                            className: 'bkbg-fc-title',
                            style: { color: a.titleColor, marginBottom: '6px' }
                        }, a.title),
                        a.showSubtitle && el('div', {
                            className: 'bkbg-fc-subtitle',
                            style: { color: a.subtitleColor, marginBottom: '20px' }
                        }, a.subtitle),
                        a.showProgress && el('div', {
                            style: { marginBottom: '16px' }
                        },
                            el('div', { style: { display: 'flex', justifyContent: 'space-between', fontSize: '13px', color: a.labelColor, marginBottom: '6px' } },
                                el('span', null, __('Progress', 'blockenberg')),
                                el('span', null, '0 / ' + cards.length + ' known')
                            ),
                            el('div', { style: { height: '8px', background: '#e5e7eb', borderRadius: '4px' } },
                                el('div', { style: { height: '100%', width: '0%', background: a.accentColor, borderRadius: '4px' } })
                            )
                        ),
                        el('div', { className: 'bkbg-fc-front', style: cardPreviewStyle },
                            el('span', null, cards[0] ? cards[0].front : 'No cards yet')
                        ),
                        el('div', { style: { display: 'flex', justifyContent: 'center', gap: '12px', marginTop: '16px', flexWrap: 'wrap' } },
                            el('button', { style: { background: '#e5e7eb', color: '#374151', border: 'none', borderRadius: '8px', padding: '10px 20px', cursor: 'pointer', fontSize: '20px' } }, '←'),
                            a.showKnownBtn && el('button', { style: { background: a.knownColor, color: '#fff', border: 'none', borderRadius: '8px', padding: '10px 18px', cursor: 'pointer', fontWeight: '600' } }, '✓ Know it'),
                            el('button', { style: { background: '#e5e7eb', color: '#374151', border: 'none', borderRadius: '8px', padding: '10px 20px', cursor: 'pointer', fontSize: '20px' } }, '→')
                        ),
                        el('div', { style: { textAlign: 'center', marginTop: '10px', display: 'flex', gap: '10px', justifyContent: 'center', flexWrap: 'wrap' } },
                            el('span', { style: { color: a.subtitleColor, fontSize: '13px' } }, '1 / ' + cards.length),
                            a.showShuffleBtn && el('button', { style: { background: 'transparent', border: '1px solid ' + a.accentColor, color: a.accentColor, borderRadius: '6px', padding: '4px 12px', cursor: 'pointer', fontSize: '12px' } }, '⇌ Shuffle'),
                            el('button', { style: { background: 'transparent', border: '1px solid #e5e7eb', color: a.subtitleColor, borderRadius: '6px', padding: '4px 12px', cursor: 'pointer', fontSize: '12px' } }, '↺ Reset')
                        ),
                        a.showKeyboardHint && el('div', { style: { textAlign: 'center', marginTop: '12px', color: a.subtitleColor, fontSize: '12px' } },
                            '← → Arrow keys to navigate • Space to flip'
                        )
                    )
                )
            );
        },
        save: function (props) {
            var a = props.attributes;
            var blockProps = wp.blockEditor.useBlockProps.save();
            return el('div', blockProps,
                el('div', {
                    className: 'bkbg-fc-app',
                    'data-opts': JSON.stringify(a)
                })
            );
        }
    });
}() );