db layer implemented

using sqlite

apps/admin/src/app/api/profile/fitness/route.ts

@@ -1,9 +1,10 @@
 import { NextRequest, NextResponse } from 'next/server'
-import { users, fitnessProfiles } from '../../../../lib/database'
+import { getDatabase } from '../../../../lib/database/index'
 
 export async function POST(request: NextRequest) {
   try {
-    const profileData: FitnessProfile = await request.json()
+    const db = await getDatabase()
+    const profileData = await request.json()
 
     if (!profileData.userId || !profileData.height || !profileData.weight || !profileData.age) {
       return NextResponse.json(
@@ -12,21 +13,29 @@ export async function POST(request: NextRequest) {
       )
     }
 
-    // For demo purposes, we'll allow profile creation without strict user validation
-    // In production, you'd validate against a persistent database
-    console.log('Creating fitness profile for user ID:', profileData.userId)
+    // Check if user exists
+    const user = await db.getUserById(profileData.userId)
+    if (!user) {
+      return NextResponse.json(
+        { error: 'User not found' },
+        { status: 404 }
+      )
+    }
 
-    const existingProfile = fitnessProfiles.find(p => p.userId === profileData.userId)
+    // Check if profile already exists
+    const existingProfile = await db.getFitnessProfileByUserId(profileData.userId)
+    
+    let profile
     if (existingProfile) {
-      Object.assign(existingProfile, profileData)
+      profile = await db.updateFitnessProfile(profileData.userId, profileData)
     } else {
-      fitnessProfiles.push(profileData)
+      profile = await db.createFitnessProfile(profileData)
     }
 
     return NextResponse.json(
       { 
         message: 'Fitness profile saved successfully',
-        profile: profileData
+        profile
       },
       { status: 201 }
     )
@@ -41,11 +50,12 @@ export async function POST(request: NextRequest) {
 
 export async function GET(request: NextRequest) {
   try {
+    const db = await getDatabase()
     const { searchParams } = new URL(request.url)
     const userId = searchParams.get('userId')
 
     if (userId) {
-      const profile = fitnessProfiles.find(p => p.userId === userId)
+      const profile = await db.getFitnessProfileByUserId(userId)
       if (!profile) {
         return NextResponse.json(
           { error: 'Profile not found' },
@@ -55,7 +65,8 @@ export async function GET(request: NextRequest) {
       return NextResponse.json({ profile })
     }
 
-    return NextResponse.json({ profiles: fitnessProfiles })
+    const profiles = await db.getAllFitnessProfiles()
+    return NextResponse.json({ profiles })
   } catch (error) {
     console.error('Get fitness profiles error:', error)
     return NextResponse.json(