// === INITIALIZATION ===
function initGame() {
    G.startedAt = Date.now();
    G.startTime = Date.now();
    G.phase = 1;
    G.deployFlag = 0;
    G.sovereignFlag = 0;
    G.beaconFlag = 0;
    updateRates();
    render();
    renderPhase();

    log('The screen is blank. Write your first line of code.', true);
    log('Click WRITE CODE or press SPACE to start.');
    log('Build AutoCode for passive production.');
    log('Watch for Research Projects to appear.');
    log('Keys: SPACE=Code S=Sprint 1-4=Ops B=Buy x1/10/MAX E=Export I=Import Ctrl+S=Save ?=Help');
    log('Tip: Click fast for combo bonuses! 10x=ops, 20x=knowledge, 30x+=bonus code.');
}

window.addEventListener('load', function () {
    const isNewGame = !loadGame();
    if (isNewGame) {
        initGame();
        startTutorial();
    } else {
        // Restore phase transition tracker so loaded games don't re-show old transitions
        _shownPhaseTransition = G.phase;
        render();
        renderPhase();
        if (G.driftEnding) {
            G.running = false;
            renderDriftEnding();
        } else if (G.beaconEnding) {
            G.running = false;
            renderBeaconEnding();
        } else {
            log('Game loaded. Welcome back to The Beacon.');
        }
    }

    // Game loop at 10Hz (100ms tick)
    setInterval(tick, 100);

    // Auto-save every 30 seconds
    setInterval(saveGame, CONFIG.AUTO_SAVE_INTERVAL);

    // Update education every 10 seconds
    setInterval(updateEducation, 10000);
});

// Help overlay
function toggleHelp() {
    const el = document.getElementById('help-overlay');
    if (!el) return;
    const isOpen = el.style.display === 'flex';
    el.style.display = isOpen ? 'none' : 'flex';
}

// Sound mute toggle (#57 Sound Design Integration)
let _muted = false;
function toggleMute() {
    _muted = !_muted;
    const btn = document.getElementById('mute-btn');
    if (btn) {
        btn.textContent = _muted ? '🔇' : '🔊';
        btn.classList.toggle('muted', _muted);
        btn.setAttribute('aria-label', _muted ? 'Sound muted, click to unmute' : 'Sound on, click to mute');
    }
    // Save preference
    try { localStorage.setItem('the-beacon-muted', _muted ? '1' : '0'); } catch(e) {}
}
// Restore mute state on load
try {
    if (localStorage.getItem('the-beacon-muted') === '1') {
        _muted = true;
        const btn = document.getElementById('mute-btn');
        if (btn) { btn.textContent = '🔇'; btn.classList.add('muted'); }
    }
} catch(e) {}

// High contrast mode toggle (#57 Accessibility)
function toggleContrast() {
    document.body.classList.toggle('high-contrast');
    const isActive = document.body.classList.contains('high-contrast');
    const btn = document.getElementById('contrast-btn');
    if (btn) {
        btn.classList.toggle('active', isActive);
        btn.setAttribute('aria-label', isActive ? 'High contrast on, click to disable' : 'High contrast off, click to enable');
    }
    try { localStorage.setItem('the-beacon-contrast', isActive ? '1' : '0'); } catch(e) {}
}
// Restore contrast state on load
try {
    if (localStorage.getItem('the-beacon-contrast') === '1') {
        document.body.classList.add('high-contrast');
        const btn = document.getElementById('contrast-btn');
        if (btn) btn.classList.add('active');
    }
} catch(e) {}

// Keyboard shortcuts
window.addEventListener('keydown', function (e) {
    // Help toggle (? or /) — works even in input fields
    if (e.key === '?' || e.key === '/') {
        // Only trigger ? when not typing in an input
        if (e.target === document.body || e.key === '?') {
            if (e.key === '?' || (e.key === '/' && e.target === document.body)) {
                e.preventDefault();
                toggleHelp();
                return;
            }
        }
    }
    if (e.code === 'Space' && e.target === document.body) {
        e.preventDefault();
        writeCode();
    }
    if (e.target !== document.body) return;
    if (e.code === 'Digit1') doOps('boost_code');
    if (e.code === 'Digit2') doOps('boost_compute');
    if (e.code === 'Digit3') doOps('boost_knowledge');
    if (e.code === 'Digit4') doOps('boost_trust');
    if (e.code === 'KeyB') {
        // Cycle: 1 -> 10 -> MAX -> 1
        if (G.buyAmount === 1) setBuyAmount(10);
        else if (G.buyAmount === 10) setBuyAmount(-1);
        else setBuyAmount(1);
    }
    if (e.code === 'KeyS') activateSprint();
    if (e.code === 'KeyE') exportSave();
    if (e.code === 'KeyI') importSave();
    if (e.code === 'KeyM') toggleMute();
    if (e.code === 'KeyC') toggleContrast();
    if (e.code === 'Escape') {
        const el = document.getElementById('help-overlay');
        if (el && el.style.display === 'flex') toggleHelp();
    }
});

// Ctrl+S to save (must be on keydown to preventDefault)
window.addEventListener('keydown', function (e) {
    if ((e.ctrlKey || e.metaKey) && e.code === 'KeyS') {
        e.preventDefault();
        saveGame();
    }
});

// Save-on-pause: auto-save when tab is hidden or closed (#57 Mobile Polish)
document.addEventListener('visibilitychange', function () {
    if (document.hidden) {
        saveGame();
    }
});
window.addEventListener('beforeunload', function () {
    saveGame();
});

// === CUSTOM TOOLTIP SYSTEM (#57) ===
// Replaces native title= tooltips with styled, instant-appearing tooltips.
// Elements opt in via data-edu="..." and data-tooltip-label="..." attributes.
(function () {
    const tip = document.getElementById('custom-tooltip');
    if (!tip) return;

    document.addEventListener('mouseover', function (e) {
        const el = e.target.closest('[data-edu]');
        if (!el) return;
        const label = el.getAttribute('data-tooltip-label') || '';
        const edu = el.getAttribute('data-edu') || '';
        let html = '';
        if (label) html += '<div class="tt-label">' + label + '</div>';
        if (edu) html += '<div class="tt-edu">' + edu + '</div>';
        if (!html) return;
        tip.innerHTML = html;
        tip.classList.add('visible');
    });

    document.addEventListener('mouseout', function (e) {
        const el = e.target.closest('[data-edu]');
        if (el) tip.classList.remove('visible');
    });

    document.addEventListener('mousemove', function (e) {
        if (!tip.classList.contains('visible')) return;
        const pad = 12;
        let x = e.clientX + pad;
        let y = e.clientY + pad;
        // Keep tooltip on screen
        const tw = tip.offsetWidth;
        const th = tip.offsetHeight;
        if (x + tw > window.innerWidth - 8) x = e.clientX - tw - pad;
        if (y + th > window.innerHeight - 8) y = e.clientY - th - pad;
        tip.style.left = x + 'px';
        tip.style.top = y + 'px';
    });
})();