Health & Fitness Coach MCP

import OpenAI from 'openai'; import { CombinedContext } from '../types/context'; /** * LLM client for generating personalized fitness and nutrition plans */ const openai = new OpenAI({ apiKey: process.env.OPENAI_API_KEY || '', }); /** * Generate a personalized fitness and nutrition plan based on user context * @param context - The user's complete health and fitness context * @returns Promise with generated plan text */ export async function generatePlan(context: CombinedContext): Promise<{ text: string }> { // Build a comprehensive prompt from the user's context const promptParts = [ "You are a professional health and fitness coach. Based on the following user data, generate a personalized workout and meal plan for the upcoming week.", "", "## User's Recent Activity", "", ]; // Add recent workouts (last 3) if (context.workouts.length > 0) { promptParts.push("### Recent Workouts:"); const recentWorkouts = context.workouts.slice(-3); recentWorkouts.forEach(workout => { promptParts.push(`- ${workout.date}: ${workout.type}, ${workout.duration} minutes${workout.distance ? `, ${workout.distance} km` : ''}`); }); promptParts.push(""); } // Add recent nutrition entries (last 5) if (context.nutrition.length > 0) { promptParts.push("### Recent Nutrition:"); const recentNutrition = context.nutrition.slice(-5); recentNutrition.forEach(entry => { promptParts.push(`- ${entry.date} (${entry.meal}): ${entry.items.join(', ')} - ${entry.calories} calories`); }); promptParts.push(""); } // Add weekly targets if available if (context.weeklyTarget) { promptParts.push("### Weekly Targets:"); promptParts.push(`- Target runs: ${context.weeklyTarget.targetRuns} per week`); promptParts.push(`- Daily calorie budget: ${context.weeklyTarget.calorieBudget} calories`); promptParts.push(""); } // Add recent feedback if available if (context.feedback.length > 0) { promptParts.push("### Recent Feedback:"); const recentFeedback = context.feedback.slice(-3); recentFeedback.forEach(feedback => { promptParts.push(`- ${feedback.date}: ${feedback.notes}`); }); promptParts.push(""); } promptParts.push("## Instructions:"); promptParts.push("Please provide:"); promptParts.push("1. A structured weekly workout plan (3-5 workouts)"); promptParts.push("2. Daily meal suggestions that align with their calorie targets"); promptParts.push("3. Specific recommendations based on their recent activity patterns"); promptParts.push("4. Motivational tips and adjustments for improvement"); promptParts.push(""); promptParts.push("Keep the plan realistic, progressive, and personalized to their current fitness level."); const prompt = promptParts.join('\n'); try { const response = await openai.chat.completions.create({ model: 'gpt-4o-mini', messages: [ { role: 'system', content: 'You are an expert health and fitness coach who creates personalized, achievable plans based on user data. Always provide specific, actionable advice.' }, { role: 'user', content: prompt } ], max_tokens: 1500, temperature: 0.7, }); const planText = response.choices[0]?.message?.content || 'Unable to generate plan at this time.'; return { text: planText }; } catch (error) { console.error('Error generating plan:', error); // Fallback plan if API fails const fallbackPlan = ` # Personalized Fitness Plan ## Weekly Workout Schedule ${context.workouts.length > 0 ? `Based on your recent ${context.workouts[context.workouts.length - 1]?.type} workout, here's your plan:` : 'Here\'s a beginner-friendly plan to get you started:' } **Monday**: 30-minute cardio (walking/jogging) **Wednesday**: Strength training (bodyweight exercises) **Friday**: 45-minute mixed cardio **Saturday**: Active recovery (yoga/stretching) ## Nutrition Recommendations ${context.weeklyTarget ? `Daily calorie target: ${context.weeklyTarget.calorieBudget} calories` : 'Focus on balanced meals with lean proteins, vegetables, and whole grains' } - Breakfast: Oatmeal with fruits and nuts - Lunch: Grilled chicken salad with mixed vegetables - Dinner: Lean protein with quinoa and steamed vegetables - Snacks: Greek yogurt, nuts, or fresh fruit ## Notes ${context.feedback.length > 0 ? `Based on your recent feedback: "${context.feedback[context.feedback.length - 1]?.notes}", consider adjusting intensity accordingly.` : 'Start gradually and listen to your body. Consistency is more important than intensity.' } *Note: This is a fallback plan. For personalized AI-generated plans, please ensure OpenAI API is configured.* `; return { text: fallbackPlan }; } }