Health & Fitness Coach MCP

// API layer for MCP server interactions const API_BASE_URL = '' // Use relative URLs to work with any port export interface UserContext { userId: string currentTargets: { calorieGoal: number workoutMinutesGoal: number stepsGoal: number } todaysProgress: { workoutMinutes: number caloriesConsumed: number stepsTaken: number workoutsCompleted: number mealsLogged: number } recentEntries: { workouts: WorkoutEntry[] nutrition: NutritionEntry[] feedback: FeedbackEntry[] } currentPlan?: { workouts: PlannedWorkout[] meals: PlannedMeal[] recommendations: string[] } } export interface WorkoutEntry { id: string timestamp: string type: 'strength' | 'cardio' name: string duration: number sets?: number reps?: number weight?: string distance?: number caloriesBurned?: number completed: boolean } export interface NutritionEntry { id: string timestamp: string mealType: 'breakfast' | 'lunch' | 'dinner' | 'snack' foodItem: string calories: number protein: number carbs: number fat: number } export interface FeedbackEntry { id: string timestamp: string type: 'progress' | 'motivation' | 'concern' notes: string rating?: number } export interface ActivityEntry { id: string timestamp: string type: 'steps' | 'water' | 'sleep' | 'weight' count?: number amount?: number duration?: number value?: number unit: string } export interface PlannedWorkout { id: string name: string type: 'strength' | 'cardio' sets: number reps: number weight?: string duration?: number completed: boolean } export interface PlannedMeal { id: string mealType: string name: string calories: number protein: number carbs: number fat: number time: string } export interface LogEntryData { workout?: Partial<WorkoutEntry> nutrition?: Partial<NutritionEntry> feedback?: Partial<FeedbackEntry> activity?: Partial<ActivityEntry> } // API Functions export async function fetchUserContext(userId: string): Promise<UserContext> { try { const response = await fetch(`${API_BASE_URL}/api/context?userId=${userId}`, { method: 'GET', headers: { 'Content-Type': 'application/json', }, }) if (!response.ok) { throw new Error(`Failed to fetch context: ${response.statusText}`) } const data = await response.json() return data } catch (error) { console.error('Error fetching user context:', error) throw new Error('Unable to load your fitness data. Please try again.') } } export async function logEntry( userId: string, entryType: 'workout' | 'nutrition' | 'feedback' | 'activity', entryData: LogEntryData ): Promise<void> { try { const response = await fetch(`${API_BASE_URL}/api/log`, { method: 'POST', headers: { 'Content-Type': 'application/json', }, body: JSON.stringify({ userId, entryType, entryData, }), }) if (!response.ok) { throw new Error(`Failed to log entry: ${response.statusText}`) } } catch (error) { console.error('Error logging entry:', error) throw new Error('Unable to save your entry. Please try again.') } } export async function generatePlan(userId: string): Promise<{ planText: string structuredPlan: { workouts: PlannedWorkout[] meals: PlannedMeal[] recommendations: string[] } }> { try { const response = await fetch(`${API_BASE_URL}/api/plan`, { method: 'POST', headers: { 'Content-Type': 'application/json', }, body: JSON.stringify({ userId, }), }) if (!response.ok) { throw new Error(`Failed to generate plan: ${response.statusText}`) } const data = await response.json() return data } catch (error) { console.error('Error generating plan:', error) throw new Error('Unable to generate your plan. Please try again.') } } export async function updateExerciseProgress( userId: string, exerciseId: string, completed: boolean, notes?: string ): Promise<void> { try { await logEntry(userId, 'feedback', { feedback: { type: 'progress', notes: `${completed ? 'Completed' : 'Skipped'} exercise ${exerciseId}${notes ? `: ${notes}` : ''}`, timestamp: new Date().toISOString(), } }) } catch (error) { console.error('Error updating exercise progress:', error) throw new Error('Unable to update exercise progress. Please try again.') } } export async function getChatResponse( userId: string, message: string, context?: UserContext ): Promise<{ response: string }> { try { const response = await fetch(`${API_BASE_URL}/api/chat`, { method: 'POST', headers: { 'Content-Type': 'application/json', }, body: JSON.stringify({ userId, message, context, }), }) if (!response.ok) { throw new Error(`Failed to get chat response: ${response.statusText}`) } return await response.json() } catch (error) { console.error('Error getting chat response:', error) // Fallback to existing intelligent response system throw error } } // Error handling utilities export class APIError extends Error { constructor(message: string, public statusCode?: number) { super(message) this.name = 'APIError' } } export function handleAPIError(error: unknown): string { if (error instanceof APIError) { return error.message } if (error instanceof Error) { return error.message } return 'An unexpected error occurred. Please try again.' }