(function () {
    'use strict';

    // ============================================================
    // ELEMENTS
    // ============================================================

    const $screen     = $('#deathscreen');
    const $icon       = $('#death-icon');
    const $statusText = $('#status-text');
    const $timerBar   = $('#timer-bar');
    const $timerLabel = $('#timer-label');
    const $timerValue = $('#timer-value');
    const $timerContainer = $('#timer-container');
    const $actionText     = $('#action-text');
    const $dispatch       = $('#dispatch');
    const $dispatchStreet = $('#dispatch-street');
    const $dispatchTitle  = $('#dispatch-title');
    const $dispatchSound  = document.getElementById('dispatch-sound');

    // ============================================================
    // STATE
    // ============================================================

    let locale = {};
    let maxTimer = 0;
    let currentState = '';
    let dispatchTimeout = null;
    let giveUpEnabled = false;
    let emsCalledFlag = false;

    // ============================================================
    // HELPERS
    // ============================================================

    function formatTime(seconds) {
        if (seconds < 0) seconds = 0;
        const m = Math.floor(seconds / 60);
        const s = seconds % 60;
        return (m < 10 ? '0' + m : m) + ':' + (s < 10 ? '0' + s : s);
    }

    function getIconForState(state) {
        switch (state) {
            case 'UNCONSCIOUS':   return 'fa-heartbeat';
            case 'BLEEDING_OUT':  return 'fa-heart-crack';
            case 'DEAD':          return 'fa-skull-crossbones'; // fallback
            default:              return 'fa-heartbeat';
        }
    }

    function getStatusClass(state) {
        switch (state) {
            case 'UNCONSCIOUS':   return '';
            case 'BLEEDING_OUT':  return 'bleeding';
            case 'DEAD':          return 'dead';
            default:              return '';
        }
    }

    function getStatusText(state) {
        switch (state) {
            case 'UNCONSCIOUS':   return locale.unconscious || 'Bewusstlos';
            case 'BLEEDING_OUT':  return locale.bleedingOut || 'Verblutung';
            case 'DEAD':          return locale.dead || 'Verstorben';
            default:              return '';
        }
    }

    // ============================================================
    // UI UPDATES
    // ============================================================

    function updateActionText() {
        $actionText.removeClass('respawn-ready ems-called');

        if (emsCalledFlag && giveUpEnabled) {
            $actionText.html(
                '<span class="ems-called">' + (locale.callingEMS || 'Rettungsdienst wird gerufen...') + '</span>' +
                '<br>' +
                '<span class="respawn-ready">' + (locale.giveUpAvailable || 'Drücke [E] zum Aufgeben') + '</span>'
            );
        } else if (emsCalledFlag) {
            $actionText.text(locale.callingEMS || 'Rettungsdienst wird gerufen...');
            $actionText.addClass('ems-called');
        } else if (giveUpEnabled) {
            $actionText.html(
                (locale.callEMS || 'Halte [G] um den Rettungsdienst zu rufen') +
                '<br>' +
                '<span class="respawn-ready">' + (locale.giveUpAvailable || 'Drücke [E] zum Aufgeben') + '</span>'
            );
        } else {
            $actionText.text(locale.callEMS || 'Halte [G] um den Rettungsdienst zu rufen');
        }
    }

    function applyState(state) {
        currentState = state;
        const cls = getStatusClass(state);

        // Icon
        $icon.find('i').attr('class', 'fas ' + getIconForState(state));
        $icon.removeClass('bleeding dead').addClass(cls);

        // Status text
        $statusText.text(getStatusText(state));
        $statusText.removeClass('bleeding dead').addClass(cls);

        // Timer bar
        $timerBar.removeClass('bleeding dead').addClass(cls);

        // Action text — Flags beibehalten beim State-Wechsel
        if (state === 'UNCONSCIOUS' || state === 'BLEEDING_OUT') {
            updateActionText();
        }

        // Timer container wieder einblenden
        if (state === 'UNCONSCIOUS' || state === 'BLEEDING_OUT') {
            $timerContainer.show();
        }

        // Timer label
        $timerLabel.text(locale.timerLabel || 'Verblutung in');
    }

    function updateTimer(seconds) {
        $timerValue.text(formatTime(seconds));

        if (maxTimer > 0) {
            const percent = (seconds / maxTimer) * 100;
            $timerBar.css('width', percent + '%');
        }
    }

    // ============================================================
    // ACTIONS
    // ============================================================

    function showDeathscreen(data) {
        locale = data.locale || {};
        maxTimer = data.timer || 0;
        giveUpEnabled = false;
        emsCalledFlag = false;

        applyState(data.state);
        updateTimer(data.timer);

        $screen.removeClass('hidden');

        // Trigger reflow, dann visible setzen für Transition
        void $screen[0].offsetWidth;
        $screen.addClass('visible');
    }

    function hideDeathscreen() {
        $screen.removeClass('visible');

        setTimeout(function () {
            $screen.addClass('hidden');
            currentState = '';
        }, 800);
    }

    // ============================================================
    // NUI MESSAGE HANDLER
    // ============================================================

    window.addEventListener('message', function (event) {
        var data = event.data;

        switch (data.action) {
            case 'show':
                showDeathscreen(data);
                break;

            case 'update':
                if (data.state !== currentState) {
                    maxTimer = data.timer;
                    applyState(data.state);
                }
                updateTimer(data.timer);
                break;

            case 'emsCalled':
                emsCalledFlag = true;
                updateActionText();
                break;

            case 'enableGiveUp':
                giveUpEnabled = true;
                updateActionText();
                break;

            case 'showDispatch':
                $dispatchTitle.text(data.title || 'Notruf');
                $dispatchStreet.text(data.street || 'Unbekannter Standort');
                $dispatch.removeClass('hidden');
                if ($dispatchSound) {
                    $dispatchSound.currentTime = 0;
                    $dispatchSound.volume = 0.5;
                    $dispatchSound.play().catch(function () {});
                }
                if (dispatchTimeout) clearTimeout(dispatchTimeout);
                dispatchTimeout = setTimeout(function () {
                    $dispatch.addClass('hidden');
                }, 15000);
                break;

            case 'hideDispatch':
                $dispatch.addClass('hidden');
                if (dispatchTimeout) clearTimeout(dispatchTimeout);
                break;

            case 'hide':
                hideDeathscreen();
                break;
        }
    });
})();