name: Android - Build and test
on:
    # Build whenever a file that affects Android is changed in a pull request
    pull_request:
        paths:
            - .github/workflows/android-app.yml
            - android/**
            - mullvad-api/**
            - mullvad-daemon/**
            - mullvad-jni/**
            - mullvad-paths/**
            - mullvad-problem-report/**
            - mullvad-types/**
            - talpid-core/**
            - talpid-platform-metadata/**
            - talpid-types/**
            - talpid-types/**
            - wireguard/**
            - Cargo.toml
            - build-apk.sh
            - update-api-metadata.sh
            - update-version-metadata.sh
    # Build if requested manually from the Actions tab
    workflow_dispatch:
      inputs:
        override_container_image:
          description: 'Override container image'
          type: string
          required: false
    # Build if master is updated to ensure up-to-date caches are available
    push:
      branches:
        - master
jobs:
    prepare:
        runs-on: ubuntu-latest
        steps:
        - name: Checkout repository
          uses: actions/checkout@v3

        - name: Use custom container image if specified
          if: "${{ github.event.inputs.override_container_image != '' }}"
          run: echo "inner_container_image=${{ github.event.inputs.override_container_image }}" >> $GITHUB_ENV

        - name: Use default container image and resolve digest
          if: "${{ github.event.inputs.override_container_image == '' }}"
          run: |
            digest="$(cat ./dist-assets/android-container-image-digest.txt)"
            echo "inner_container_image=ghcr.io/mullvad/mullvadvpn-app-build-android@sha256:$digest" >> $GITHUB_ENV

        outputs:
          container_image: "${{ env.inner_container_image }}"

    build:
        needs: prepare
        runs-on: ubuntu-latest
        container:
          image: "${{ needs.prepare.outputs.container_image }}"
        steps:
            # Fix for HOME path overridden by GH runners when building in containers, see:
            # https://github.com/actions/runner/issues/863
            - name: Fix HOME path
              run: echo "HOME=/root" >> $GITHUB_ENV

            - name: Checkout repository
              uses: actions/checkout@v3

            - name: Calculate native lib cache hash
              id: native-lib-cache-hash
              shell: bash
              run: |
                non_android_hash="$(git grep --cached -l '' -- ':!android/' | xargs -d '\n' sha1sum | sha1sum | awk '{print $1}')"
                echo "native_lib_hash=$non_android_hash" >> $GITHUB_OUTPUT

            - name: Cache native libraries
              uses: actions/cache@v3
              id: cache-native-libs
              with:
                path: |
                  ./android/app/build/extraJni
                  ./dist-assets/relays.json
                  ./dist-assets/api-ip-address.txt
                key: android-native-libs-${{ runner.os }}-x86_64-${{ steps.native-lib-cache-hash.outputs.native_lib_hash }}

            - name: Build native libraries
              if: steps.cache-native-libs.outputs.cache-hit != 'true'
              env:
                RUSTFLAGS: --deny warnings
                ABI: x86_64
                TARGET: x86_64-linux-android
                BUILD_TYPE: debug
              run: |
                ARCHITECTURES="$ABI"
                UNSTRIPPED_LIB_PATH="$CARGO_TARGET_DIR/$TARGET/$BUILD_TYPE/libmullvad_jni.so"
                STRIPPED_LIB_PATH="./android/app/build/extraJni/$ABI/libmullvad_jni.so"
                NDK_TOOLCHAIN_STRIP_TOOL="$NDK_TOOLCHAIN_DIR/x86_64-linux-android-strip"
                ./wireguard/build-wireguard-go.sh --android --no-docker
                cargo build --target $TARGET --verbose --package mullvad-jni
                cargo run --bin relay_list > dist-assets/relays.json
                $NDK_TOOLCHAIN_STRIP_TOOL --strip-debug --strip-unneeded -o "$STRIPPED_LIB_PATH" "$UNSTRIPPED_LIB_PATH"

            - name: Build Android app
              uses: burrunan/gradle-cache-action@v1
              with:
                job-id: jdk8
                arguments: assembleDebug
                gradle-version: wrapper
                build-root-directory: android

            - name: Run unit tests
              uses: burrunan/gradle-cache-action@v1
              with:
                job-id: jdk8
                arguments: testDebugUnitTest
                gradle-version: wrapper
                build-root-directory: android
                execution-only-caches: true

            - name: Assemble instrumented test apk
              uses: burrunan/gradle-cache-action@v1
              with:
                job-id: jdk8
                arguments: assembleAndroidTest
                gradle-version: wrapper
                build-root-directory: android
                execution-only-caches: true

            - name: Upload apks
              uses: actions/upload-artifact@v3
              with:
                name: apks
                path: android/app/build/outputs/apk
                if-no-files-found: error
                retention-days: 1

    instrumented-tests:
        name: Instrumented tests
        runs-on: macos-latest
        timeout-minutes: 30
        needs:
          - build
        strategy:
            fail-fast: false
        steps:
            - name: Checkout repository
              uses: actions/checkout@v3

            - uses: actions/download-artifact@v3
              with:
                name: apks

            - name: AVD cache
              uses: actions/cache@v3
              id: avd-cache
              with:
                path: |
                  ~/.android/avd/*
                  ~/.android/adb*
                key: emulator-api-29

            - name: Create avd and generate snapshot
              uses: reactivecircus/android-emulator-runner@v2
              if: steps.avd-cache.outputs.cache-hit != 'true'
              with:
                force-avd-creation: false
                api-level: 29
                arch: x86_64
                emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
                disable-animations: true
                profile: pixel
                script: echo "Generated AVD snapshot for caching."
              env:
                API_LEVEL: 29

            - name: Run Android instrumented tests
              uses: reactivecircus/android-emulator-runner@v2
              with:
                force-avd-creation: false
                api-level: 29
                arch: x86_64
                emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
                disable-animations: true
                profile: pixel
                script: ./ci/run-android-instrumented-tests.sh $(pwd)
              env:
                API_LEVEL: 29