// --- Export to PNG --- async function exportToPNG() { const btn = document.querySelector('button[>

try { const element = document.getElementById('infographic-content'); // Ensure charts are rendered before capture const canvas = await html2canvas(element, { scale: 2, useCORS: true, backgroundColor: "#f3f4f6", logging: false });

const link = document.createElement('a'); link.download = '101autism-meal-rotation.png'; link.href = canvas.toDataURL('image/png'); link.click(); } catch (error) { console.error("Export failed", error); } finally { btn.innerHTML = originalText; btn.disabled = false; } }

// --- Gemini API Call Wrapper (with Exponential Backoff) --- async function callGemini(prompt, systemInstruction = "") { let delay = 1000; for (let i = 0; i setTimeout(r, delay)); delay *= 2; } } }

// --- Sensory Lab --- async function getSensoryAdaptation() { const input = document.getElementById('meal-input').value; const btn = document.getElementById('lab-btn'); const res = document.getElementById('lab-result'); if (!input) return;

btn.disabled = true; btn.innerText = "Analyzing..."; res.classList.remove('hidden'); res.classList.add('loading-shimmer'); res.innerText = "Thinking...";

try { const prompt = `Provide 3 short sensory adaptations for this meal: "${input}". Categorize them by: 1. Crunchy (high feedback) 2. Smooth (uniform texture) 3. Deconstructed (keeping parts separate). Keep it brief and encouraging for a caregiver.`;

const response = await callGemini(prompt, "You are an expert sensory therapist for children with autism."); res.classList.remove('loading-shimmer'); res.innerText = response; } catch (e) { res.innerText = "Connection error. Please try again."; } finally { btn.disabled = false; btn.innerText = "Analyze"; } }

// --- AI Progress Report --- async function generateAIReport() { const obs = document.getElementById('observations-input').value; const container = document.getElementById('report-container'); const textDiv = document.getElementById('report-text'); const btn = document.getElementById('report-btn');

if (!obs) return;

btn.disabled = true; textDiv.innerText = "Summarizing progress..."; container.classList.remove('hidden');

try { const prompt = `Analyze these caregiver observations: "${obs}". Provide a professional 2-sentence summary of the win and one piece of encouraging advice regarding food exploration.`; const response = await callGemini(prompt, "You are a clinical psychologist specializing in autism sensory support."); textDiv.innerText = response; } catch (e) { textDiv.innerText = "Error generating report."; } finally { btn.disabled = false; } }

// --- TTS Prep Guide --- async function speakPrepTips() { const textToSpeak = "Say warmly: Welcome to your meal rotation. Monday: Nuggets, keep sauce separate. Tuesday: Pasta, use the same brand. Wednesday: Yogurt, whisk until silky. Thursday: Quesadilla, melt fully. Friday: Potatoes, whip until smooth.";

try { const response = await fetch(`https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-preview-tts:generateContent?key=${apiKey}`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ contents: [{ parts: [{ text: textToSpeak }] }], generationConfig: { responseModalities: ["AUDIO"], speechConfig: { voiceConfig: { prebuiltVoiceConfig: { voiceName: "Kore" } } } } }) }); const result = await response.json(); const pcmData = result.candidates[0].content.parts[0].inlineData.data;

// Convert PCM16 to WAV for playback const playAudio = (base64) => { const binary = atob(base64); const len = binary.length; const bytes = new Uint8Array(len); for (let i = 0; i { const pcm = Uint8Array.from(atob(pcmBase64), c => c.charCodeAt(0)).buffer; const wav = new Uint8Array(44 + pcm.byteLength); const view = new DataView(wav.buffer); const writeString = (offset, string) => { for (let i = 0; i { const label = items[0].chart.data.labels[items[0].dataIndex]; return Array.isArray(label) ? label.join(' ') : label; } } };

// Texture Chart new Chart(document.getElementById('textureChart'), { type: 'doughnut', data: { labels: ['Crunchy', 'Soft', 'Smooth', 'Chewy', 'Uniform'], datasets: [{ data: [20, 30, 20, 20, 10], backgroundColor: ['#F97316', '#EAB308', '#06B6D4', '#8B5CF6', '#84CC16'], borderWidth: 0 }] }, options: { responsive: true, maintainAspectRatio: false, plugins: { tooltip: commonTooltip, legend: { position: 'bottom' } } } });

// Radar Chart new Chart(document.getElementById('sensoryRadar'), { type: 'radar', data: { labels: ['Crunch', 'Softness', 'Smoothness', 'Predictability', 'Effort'], datasets: [ { label: 'Nuggets', data: [95, 20, 10, 90, 30], borderColor: '#F97316', backgroundColor: 'rgba(249,115,22,0.1)' }, { label: 'Yogurt', data: [0, 80, 100, 95, 20], borderColor: '#06B6D4', backgroundColor: 'rgba(6,182,212,0.1)' } ] }, options: { responsive: true, maintainAspectRatio: false, plugins: { tooltip: commonTooltip } } });

// Bar Chart new Chart(document.getElementById('safetyChart'), { type: 'bar', data: { labels: ['Nuggets', 'Pasta', 'Yogurt', 'Quesadilla', 'Potatoes'], datasets: [{ label: 'Safety Score', data: [85, 90, 95, 80, 98], backgroundColor: '#84CC16' }] }, options: { indexAxis: 'y', responsive: true, maintainAspectRatio: false, plugins: { tooltip: commonTooltip } } }); };