/* WooDoo Frontend JS */
( function () {
    'use strict';

    // ══════════════════════════════════════════════════════════════════════
    // INVOICE EMAIL
    // ══════════════════════════════════════════════════════════════════════
    const inv = window.WooDooInvoices;
    if ( inv ) {
        document.querySelectorAll( '.woodoo-send-invoice' ).forEach( function ( btn ) {
            btn.addEventListener( 'click', function () {
                const invoiceId = this.dataset.id;
                const $btn      = this;
                const row       = $btn.closest( 'tr' );

                // Remove any previous feedback in this row
                const prev = row.querySelector( '.woodoo-inline-msg' );
                if ( prev ) prev.remove();

                $btn.disabled    = true;
                $btn.textContent = 'Enviando…';

                const body = new URLSearchParams( {
                    action     : 'woodoo_send_invoice_email',
                    nonce      : inv.nonce,
                    invoice_id : invoiceId,
                } );

                fetch( inv.ajax_url, { method: 'POST', body } )
                    .then( r => r.json() )
                    .then( function ( res ) {
                        if ( res.success ) {
                            $btn.textContent = '✓ Enviado';
                            $btn.style.color = '#065f46';
                            // Show success message below the row
                            const td = document.createElement( 'td' );
                            td.colSpan = 6;
                            td.className = 'woodoo-inline-msg woodoo-inline-msg--ok';
                            td.textContent = res.data.message;
                            const msgRow = document.createElement( 'tr' );
                            msgRow.className = 'woodoo-inline-msg';
                            msgRow.appendChild( td );
                            row.insertAdjacentElement( 'afterend', msgRow );
                            // Auto-hide after 6s
                            setTimeout( function () {
                                msgRow.remove();
                                $btn.disabled    = false;
                                $btn.textContent = '✉ Reenviar';
                                $btn.style.color = '';
                            }, 6000 );
                        } else {
                            showInvoiceError( row, res.data || 'Error desconocido.' );
                            $btn.disabled    = false;
                            $btn.textContent = '✉ Reenviar';
                        }
                    } )
                    .catch( function () {
                        showInvoiceError( row, 'Error de conexión. Inténtalo de nuevo.' );
                        $btn.disabled    = false;
                        $btn.textContent = '✉ Reenviar';
                    } );
            } );
        } );

        function showInvoiceError( row, msg ) {
            const prev = row.querySelector( '.woodoo-inline-msg' );
            if ( prev ) prev.remove();
            const td = document.createElement( 'td' );
            td.colSpan = 6;
            td.className = 'woodoo-inline-msg woodoo-inline-msg--err';
            td.textContent = msg;
            const msgRow = document.createElement( 'tr' );
            msgRow.className = 'woodoo-inline-msg';
            msgRow.appendChild( td );
            row.insertAdjacentElement( 'afterend', msgRow );
        }
    }

    // ══════════════════════════════════════════════════════════════════════
    // CALENDAR BOOKING
    // ══════════════════════════════════════════════════════════════════════
    const cfg = window.WooDooCalendar;
    if ( ! cfg ) return;

    const i18n    = cfg.i18n;
    const ajaxUrl = cfg.ajax_url;
    const nonce   = cfg.nonce;

    const dateInput    = document.getElementById( 'woodoo-booking-date' );
    const slotsWrap    = document.getElementById( 'woodoo-slots-wrap' );
    const slotsGrid    = document.getElementById( 'woodoo-slots-grid' );
    const confirmBlock = document.getElementById( 'woodoo-booking-confirm' );
    const bookBtn      = document.getElementById( 'woodoo-book-btn' );
    const notesArea    = document.getElementById( 'woodoo-booking-notes' );
    const slotLabel    = document.getElementById( 'woodoo-selected-slot-label' );
    const successMsg   = document.getElementById( 'woodoo-booking-success' );
    const errorMsg     = document.getElementById( 'woodoo-booking-error' );

    let selectedStart = null;
    let selectedEnd   = null;

    // ── Date change → load slots ─────────────────────────────────────────
    if ( dateInput ) {
        dateInput.addEventListener( 'change', function () {
            const date = this.value;
            if ( ! date ) return;

            slotsGrid.innerHTML = '<em>' + esc( i18n.loading ) + '</em>';
            slotsWrap.style.display  = 'block';
            confirmBlock.style.display = 'none';
            successMsg.style.display = 'none';
            errorMsg.style.display   = 'none';
            selectedStart = selectedEnd = null;
            bookBtn.disabled = true;

            post( 'woodoo_get_slots', { date } )
                .then( res => {
                    if ( ! res.success ) {
                        slotsGrid.innerHTML = '<em>' + esc( i18n.error ) + '</em>';
                        return;
                    }
                    const slots = res.data;
                    if ( ! slots.length ) {
                        slotsGrid.innerHTML = '<em>' + esc( i18n.no_slots ) + '</em>';
                        confirmBlock.style.display = 'none';
                        return;
                    }
                    slotsGrid.innerHTML = '';
                    slots.forEach( slot => {
                        const btn = document.createElement( 'button' );
                        btn.type        = 'button';
                        btn.className   = 'woodoo-slot';
                        btn.textContent = formatTime( slot.start ) + ' – ' + formatTime( slot.end );
                        btn.dataset.start = slot.start;
                        btn.dataset.end   = slot.end;
                        btn.addEventListener( 'click', onSlotClick );
                        slotsGrid.appendChild( btn );
                    } );
                } )
                .catch( () => { slotsGrid.innerHTML = '<em>' + esc( i18n.error ) + '</em>'; } );
        } );
    }

    function onSlotClick( e ) {
        document.querySelectorAll( '.woodoo-slot' ).forEach( b => b.classList.remove( 'selected' ) );
        const btn = e.currentTarget;
        btn.classList.add( 'selected' );
        selectedStart = btn.dataset.start;
        selectedEnd   = btn.dataset.end;

        slotLabel.textContent =
            new Date( selectedStart ).toLocaleDateString( 'es-ES', {
                weekday: 'long', year: 'numeric', month: 'long', day: 'numeric',
            } ) + ', ' + formatTime( selectedStart ) + ' – ' + formatTime( selectedEnd );

        confirmBlock.style.display = 'block';
        bookBtn.disabled = false;
        successMsg.style.display = 'none';
        errorMsg.style.display   = 'none';
    }

    // ── Confirm booking ──────────────────────────────────────────────────
    if ( bookBtn ) {
        bookBtn.addEventListener( 'click', function () {
            if ( ! selectedStart || ! selectedEnd ) return;
            bookBtn.disabled    = true;
            bookBtn.textContent = i18n.booking;
            errorMsg.style.display = 'none';

            post( 'woodoo_book_slot', {
                start : selectedStart,
                end   : selectedEnd,
                notes : notesArea ? notesArea.value : '',
            } )
            .then( res => {
                if ( res.success ) {
                    successMsg.textContent   = res.data.message;
                    successMsg.style.display = 'block';
                    confirmBlock.style.display = 'none';
                    slotsWrap.style.display  = 'none';
                    dateInput.value = '';
                    selectedStart = selectedEnd = null;
                    refreshMeetings();
                } else {
                    showCalError( res.data || i18n.error );
                    bookBtn.disabled    = false;
                    bookBtn.textContent = i18n.book_btn;
                }
            } )
            .catch( () => {
                showCalError( i18n.error );
                bookBtn.disabled    = false;
                bookBtn.textContent = i18n.book_btn;
            } );
        } );
    }

    // ── Cancel meeting ───────────────────────────────────────────────────
    document.querySelectorAll( '.woodoo-cancel-meeting' ).forEach( btn => {
        btn.addEventListener( 'click', function () {
            if ( ! confirm( i18n.cancel_confirm ) ) return;
            const eventId = this.dataset.eventId;
            const card    = this.closest( '.woodoo-meeting-card' );
            this.disabled    = true;
            this.textContent = i18n.cancelling;

            post( 'woodoo_cancel_meeting', { event_id: eventId } )
                .then( res => {
                    if ( res.success ) {
                        card.style.opacity    = '0.4';
                        card.style.transition = 'opacity .3s';
                        setTimeout( () => card.remove(), 350 );
                    } else {
                        alert( res.data || i18n.error );
                        this.disabled    = false;
                        this.textContent = 'Cancelar';
                    }
                } )
                .catch( () => {
                    this.disabled    = false;
                    this.textContent = 'Cancelar';
                } );
        } );
    } );

    // ── Refresh meetings list ────────────────────────────────────────────
    function refreshMeetings() {
        const listEl = document.getElementById( 'woodoo-meetings-list' );
        if ( ! listEl ) return;
        post( 'woodoo_get_meetings', {} )
            .then( res => {
                if ( ! res.success || ! res.data.length ) {
                    listEl.innerHTML = '<p class="woodoo-empty">No tienes reuniones programadas.</p>';
                    return;
                }
                const meses = [ '', 'ene', 'feb', 'mar', 'abr', 'may', 'jun',
                                 'jul', 'ago', 'sep', 'oct', 'nov', 'dic' ];
                let html = '<div class="woodoo-meetings-grid">';
                res.data.forEach( ev => {
                    const start = new Date( ev.start.replace( ' ', 'T' ) );
                    const end   = new Date( ev.stop.replace(  ' ', 'T' ) );
                    html +=
                        '<div class="woodoo-meeting-card" data-event-id="' + ev.id + '">' +
                            '<div class="woodoo-meeting-card__date">' +
                                '<span class="woodoo-meeting-card__day">'   + pad( start.getDate() )         + '</span>' +
                                '<span class="woodoo-meeting-card__month">' + ( meses[ start.getMonth() + 1 ] || '' ) + '</span>' +
                            '</div>' +
                            '<div class="woodoo-meeting-card__info">' +
                                '<strong>' + esc( ev.name ) + '</strong>' +
                                '<span class="woodoo-meeting-card__time">' + timeStr( start ) + ' – ' + timeStr( end ) + '</span>' +
                                ( ev.videocall_location
                                    ? '<a href="' + esc( ev.videocall_location ) + '" target="_blank" rel="noopener" class="woodoo-meeting-card__video">Unirse a la videollamada</a>'
                                    : '' ) +
                            '</div>' +
                            '<div class="woodoo-meeting-card__actions">' +
                                '<button class="woodoo-cancel-meeting woodoo-btn woodoo-btn--sm woodoo-btn--outline" data-event-id="' + ev.id + '">Cancelar</button>' +
                            '</div>' +
                        '</div>';
                } );
                html += '</div>';
                listEl.innerHTML = html;
            } );
    }

    // ── Helpers ──────────────────────────────────────────────────────────
    function post( action, data ) {
        const body = new URLSearchParams( Object.assign( { action, nonce }, data ) );
        return fetch( ajaxUrl, { method: 'POST', body } ).then( r => r.json() );
    }

    function formatTime( dt ) { return dt.slice( 11, 16 ); }
    function timeStr( d )     { return pad( d.getHours() ) + ':' + pad( d.getMinutes() ); }
    function pad( n )         { return String( n ).padStart( 2, '0' ); }

    function esc( str ) {
        return String( str )
            .replace( /&/g, '&amp;' ).replace( /</g, '&lt;' )
            .replace( />/g, '&gt;' ).replace( /"/g, '&quot;' );
    }

    function showCalError( msg ) {
        errorMsg.textContent   = msg;
        errorMsg.style.display = 'block';
    }

} )();