name: Flutter APK Build

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
  workflow_dispatch:

jobs:
  build_apk:
    name: Build Flutter APK
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Cache pub deps
        uses: actions/cache@v3
        with:
          path: ~/.pub-cache
          key: ${{ runner.os }}-pub-${{ hashFiles('**/pubspec.yaml') }}
          restore-keys: ${{ runner.os }}-pub-

      - name: Setup Java (Temurin 17)
        uses: actions/setup-java@v3
        with:
          distribution: temurin
          java-version: '17'
      
      - name: Setup Flutter
        uses: subosito/flutter-action@v2
        with:
          channel: 'stable'
      
      - name: Get dependencies
        run: flutter pub get
      
      - name: Build APK
        run: flutter build apk --release
      
      - name: Upload APK artifact
        uses: actions/upload-artifact@v3
        with:
          name: flutter-apk
          path: build/app/outputs/flutter-apk/app-release.apk
          retention-days: 30