---
name: Android - Build and test
on:
  pull_request:
    paths:
      - '**'
      - '!.github/workflows/**'
      - '.github/workflows/android-app.yml'
      - '!audits/**'
      - '!ci/**'
      - '!dist-assets/**'
      - '!docs/**'
      - '!graphics/**'
      - '!gui/**'
      - '!ios/**'
      - '!test/**'
      - '!scripts/**'
      - '!windows/**'
      - '!**/**.md'
  schedule:
    # At 06:20 UTC every day.
    # Notifications for scheduled workflows are sent to the user who last modified the cron
    # syntax in the workflow file. If you update this you must have notifications for
    # Github Actions enabled, so these don't go unnoticed.
    # https://docs.github.com/en/actions/monitoring-and-troubleshooting-workflows/notifications-for-workflow-runs
    - cron: '20 6 * * *'
  workflow_dispatch:
    inputs:
      override_container_image:
        description: Override container image
        type: string
        required: false
      run_e2e_tests:
        description: Run e2e tests
        type: boolean
        required: false
      run_firebase_tests:
        description: Run firebase tests
        type: boolean
        required: false
      mockapi_test_repeat:
        description: Mockapi test repeat
        default: '1'
        required: true
        type: string
  # Build if main is updated to ensure up-to-date caches are available
  push:
    branches: [main]
jobs:
  prepare:
    name: Prepare
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - 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: ${{ github.event.inputs.override_container_image == '' }}
        run: |
          echo "inner_container_image=$(cat ./building/android-container-image.txt)" >> $GITHUB_ENV
    outputs:
      container_image: ${{ env.inner_container_image }}

  generate-debug-keystore:
    name: Generate debug keystore
    needs: prepare
    runs-on: ubuntu-latest
    steps:
      - name: Generate keystore
        run: >-
          keytool -genkey
          -keystore debug.keystore
          -storepass android
          -alias androiddebugkey
          -keypass android
          -keyalg RSA
          -keysize 2048
          -validity 10000
          -dname "CN=Android Debug,O=Android,C=US"

      - name: Upload keystore
        uses: actions/upload-artifact@v4
        with:
          name: debug-keystore
          path: debug.keystore
          if-no-files-found: error
          retention-days: 7

  generate-relay-list:
    name: Generate relay list
    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: Get date
        id: get-date
        shell: bash
        run: echo "date=$(/bin/date -u "+%Y%m%d")" >> $GITHUB_OUTPUT

      - name: Cache
        uses: actions/cache@v4
        id: cache-relay-list
        with:
          path: build/relays.json
          key: relay-list-${{ steps.get-date.outputs.date }}

      - name: Checkout repository
        if: steps.cache-relay-list.outputs.cache-hit != 'true'
        uses: actions/checkout@v4

      - name: Generate
        if: steps.cache-relay-list.outputs.cache-hit != 'true'
        env:
          RUSTFLAGS: --deny warnings
        run: |
          mkdir -p build
          cargo run --bin relay_list > build/relays.json

      - name: Upload
        uses: actions/upload-artifact@v4
        with:
          name: relay-list
          path: build/relays.json
          if-no-files-found: error
          retention-days: 7

  build-native:
    name: Build native
    needs: prepare
    runs-on: ubuntu-latest
    container:
      image: "${{ needs.prepare.outputs.container_image }}"
    strategy:
      matrix:
        include:
          - arch: "x86_64"
            abi: "x86_64"
            target: "x86_64-linux-android"
          - arch: "i686"
            abi: "x86"
            target: "i686-linux-android"
          - arch: "aarch64"
            abi: "arm64-v8a"
            target: "aarch64-linux-android"
          - arch: "armv7"
            abi: "armeabi-v7a"
            target: "armv7-linux-androideabi"
    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@v4

      - name: Calculate native lib cache hash
        id: native-lib-cache-hash
        shell: bash
        run: |
          git config --global --add safe.directory $(pwd)
          non_android_hash="$(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@v4
        id: cache-native-libs
        env:
          cache_hash: ${{ steps.native-lib-cache-hash.outputs.native_lib_hash }}
        with:
          path: ./android/app/build/extraJni
          key: android-native-libs-${{ runner.os }}-${{ matrix.abi }}-${{ env.cache_hash }}

      - name: Build native libraries
        if: steps.cache-native-libs.outputs.cache-hit != 'true'
        env:
          RUSTFLAGS: --deny warnings
          BUILD_TYPE: debug
        run: |
          ARCHITECTURES="${{ matrix.abi }}"
          UNSTRIPPED_LIB_PATH="$CARGO_TARGET_DIR/${{ matrix.target }}/$BUILD_TYPE/libmullvad_jni.so"
          STRIPPED_LIB_PATH="./android/app/build/extraJni/${{ matrix.abi }}/libmullvad_jni.so"
          NDK_TOOLCHAIN_STRIP_TOOL="$NDK_TOOLCHAIN_DIR/llvm-strip"
          ./wireguard/build-wireguard-go.sh --android --no-docker
          cargo build --target ${{ matrix.target }} --verbose --package mullvad-jni --features api-override
          $NDK_TOOLCHAIN_STRIP_TOOL --strip-debug --strip-unneeded -o "$STRIPPED_LIB_PATH" "$UNSTRIPPED_LIB_PATH"

      - name: Upload native libs
        uses: actions/upload-artifact@v4
        with:
          name: native-libs-${{ matrix.arch }}
          path: android/app/build/extraJni
          if-no-files-found: error
          retention-days: 7

  run-lint-and-tests:
    name: Run lint and test tasks
    needs: [prepare]
    runs-on: ubuntu-latest
    container:
      image: ${{ needs.prepare.outputs.container_image }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - gradle-task: |
              testDebugUnitTest -x :test:arch:testDebugUnitTest
              :app:testOssProdDebugUnitTest
              :service:testOssProdDebugUnitTest
              :lib:billing:testDebugUnitTest
          - gradle-task: :test:arch:test --rerun-tasks
          - gradle-task: detekt
          - gradle-task: lint
    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@v4

      - name: Run gradle task
        uses: burrunan/gradle-cache-action@v1
        with:
          job-id: jdk17
          arguments: ${{ matrix.gradle-task }}
          gradle-version: wrapper
          build-root-directory: android
          execution-only-caches: false
          # Disable if logs are hard to follow.
          concurrent: true
          read-only: ${{ github.ref != 'refs/heads/main' }}

  build-app:
    name: Build app
    needs: [prepare, generate-debug-keystore]
    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@v4

      - uses: actions/download-artifact@v4
        with:
          name: debug-keystore
          path: /root/.android

      - name: Compile app
        uses: burrunan/gradle-cache-action@v1
        with:
          job-id: jdk17
          arguments: compileOssProdDebugKotlin
          gradle-version: wrapper
          build-root-directory: android
          execution-only-caches: false
          # Disable if logs are hard to follow.
          concurrent: true
          read-only: ${{ github.ref != 'refs/heads/main' }}

      - name: Wait for other jobs (native, relay list)
        uses: kachick/wait-other-jobs@v2.0.3
        with:
          wait-list: |
            [
              {
                "workflowFile": "android-app.yml",
                "jobName": "build-native"
              },
              {
                "workflowFile": "android-app.yml",
                "jobName": "generate-relay-list"
              }
            ]

      - uses: actions/download-artifact@v4
        with:
          pattern: native-libs-*
          path: android/app/build/extraJni
          merge-multiple: true

      - uses: actions/download-artifact@v4
        with:
          name: relay-list
          path: build

      - name: Build app
        uses: burrunan/gradle-cache-action@v1
        with:
          job-id: jdk17
          arguments: assembleOssProdDebug
          gradle-version: wrapper
          build-root-directory: android
          execution-only-caches: true
          # Disable if logs are hard to follow.
          concurrent: true
          read-only: ${{ github.ref != 'refs/heads/main' }}

      - name: Build stagemole app
        uses: burrunan/gradle-cache-action@v1
        if: github.event_name == 'schedule' || github.event.inputs.run_firebase_tests == 'true'
        with:
          job-id: jdk17
          arguments: assemblePlayStagemoleDebug
          gradle-version: wrapper
          build-root-directory: android
          execution-only-caches: true
          # Disable if logs are hard to follow.
          concurrent: true
          read-only: ${{ github.ref != 'refs/heads/main' }}

      - name: Upload apks
        # Using v3 due to v4 being very slow for this artifact.
        uses: actions/upload-artifact@v3
        with:
          name: apks
          path: android/app/build/outputs/apk
          if-no-files-found: error
          retention-days: 7

  build-instrumented-tests:
    name: Build instrumented test packages
    needs: [prepare, generate-debug-keystore]
    runs-on: ubuntu-latest
    container:
      image: ${{ needs.prepare.outputs.container_image }}
    strategy:
      matrix:
        include:
          - test-type: app
            assemble-command: assembleOssProdAndroidTest
            artifact-path: android/app/build/outputs/apk
          - test-type: mockapi
            assemble-command: :test:mockapi:assemble
            artifact-path: android/test/mockapi/build/outputs/apk
          - test-type: e2e
            assemble-command: :test:e2e:assemble
            artifact-path: android/test/e2e/build/outputs/apk
    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@v4

      - uses: actions/download-artifact@v4
        with:
          name: debug-keystore
          path: /root/.android

      - name: Assemble instrumented test apk
        uses: burrunan/gradle-cache-action@v1
        with:
          job-id: jdk17
          arguments: ${{ matrix.assemble-command }}
          gradle-version: wrapper
          build-root-directory: android
          execution-only-caches: false
          # Disable if logs are hard to follow.
          concurrent: true
          read-only: ${{ github.ref != 'refs/heads/main' }}

      - name: Upload apks
        # Using v3 due to v4 being very slow for this artifact.
        uses: actions/upload-artifact@v3
        with:
          name: ${{ matrix.test-type }}-instrumentation-apks
          path: ${{ matrix.artifact-path }}
          if-no-files-found: error
          retention-days: 7

  instrumented-tests:
    name: Run instrumented tests
    runs-on: [self-hosted, android-device]
    timeout-minutes: 30
    needs: [build-app, build-instrumented-tests]
    strategy:
      fail-fast: false
      matrix:
        include:
          - test-type: app
            path: android/app/build/outputs/apk
            test-repeat: 1
          # Disabled (test-repeat='0') due to flakiness unless overridden by input.
          - test-type: mockapi
            path: android/test/mockapi/build/outputs/apk
            test-repeat: ${{ github.event.inputs.mockapi_test_repeat || 0 }}
    steps:
      - name: Prepare report dir
        if: ${{ matrix.test-repeat != 0 }}
        id: prepare-report-dir
        env:
          INNER_REPORT_DIR: /tmp/${{ matrix.test-type }}-${{ github.run_id }}-${{ github.run_attempt }}
        run: |
          mkdir -p $INNER_REPORT_DIR
          echo "report_dir=$INNER_REPORT_DIR" >> $GITHUB_OUTPUT

      - name: Checkout repository
        if: ${{ matrix.test-repeat != 0 }}
        uses: actions/checkout@v4

      # Using v3 due to v4 being very slow for this artifact.
      - uses: actions/download-artifact@v3
        if: ${{ matrix.test-repeat != 0 }}
        with:
          name: apks
          path: android/app/build/outputs/apk

      # Using v3 due to v4 being very slow for this artifact.
      - uses: actions/download-artifact@v3
        if: ${{ matrix.test-repeat != 0 }}
        with:
          name: ${{ matrix.test-type }}-instrumentation-apks
          path: ${{ matrix.path }}

      - name: Run instrumented test script
        if: ${{ matrix.test-repeat != 0 }}
        shell: bash -ieo pipefail {0}
        env:
          AUTO_FETCH_TEST_HELPER_APKS: true
          TEST_TYPE: ${{ matrix.test-type }}
          BILLING_FLAVOR: oss
          INFRA_FLAVOR: prod
          REPORT_DIR: ${{ steps.prepare-report-dir.outputs.report_dir }}
        run: ./android/scripts/run-instrumented-tests-repeat.sh ${{ matrix.test-repeat }}

      - name: Upload instrumentation report (${{ matrix.test-type }})
        uses: actions/upload-artifact@v4
        if: ${{ matrix.test-repeat != 0 }}
        with:
          name: ${{ matrix.test-type }}-instrumentation-report
          path: ${{ steps.prepare-report-dir.outputs.report_dir }}
          if-no-files-found: ignore
          retention-days: 7

  instrumented-e2e-tests:
    name: Run instrumented e2e tests
    runs-on: [self-hosted, android-device]
    if: github.event_name == 'schedule' || github.event.inputs.run_e2e_tests == 'true'
    timeout-minutes: 30
    needs: [build-app, build-instrumented-tests]
    steps:
      - name: Prepare report dir
        id: prepare-report-dir
        env:
          INNER_REPORT_DIR: /tmp/${{ matrix.test-type }}-${{ github.run_id }}-${{ github.run_attempt }}
        run: |
          mkdir -p $INNER_REPORT_DIR
          echo "report_dir=$INNER_REPORT_DIR" >> $GITHUB_OUTPUT

      - name: Checkout repository
        uses: actions/checkout@v4

      # Using v3 due to v4 being very slow for this artifact.
      - uses: actions/download-artifact@v3
        with:
          name: apks
          path: android/app/build/outputs/apk

      # Using v3 due to v4 being very slow for this artifact.
      - uses: actions/download-artifact@v3
        with:
          name: e2e-instrumentation-apks
          path: android/test/e2e/build/outputs/apk

      - name: Run instrumented test script
        shell: bash -ieo pipefail {0}
        env:
          AUTO_FETCH_TEST_HELPER_APKS: true
          TEST_TYPE: e2e
          BILLING_FLAVOR: oss
          INFRA_FLAVOR: prod
          VALID_TEST_ACCOUNT_TOKEN: ${{ secrets.ANDROID_PROD_TEST_ACCOUNT }}
          INVALID_TEST_ACCOUNT_TOKEN: '0000000000000000'
          REPORT_DIR: ${{ steps.prepare-report-dir.outputs.report_dir }}
        run: ./android/scripts/run-instrumented-tests.sh

  firebase-tests:
    name: Run firebase tests
    if: github.event_name == 'schedule' || github.event.inputs.run_firebase_tests == 'true'
    runs-on: ubuntu-latest
    timeout-minutes: 30
    needs: [build-app, build-instrumented-tests]
    env:
      FIREBASE_ENVIRONMENT_VARIABLES: "\
        clearPackageData=true,\
        runnerBuilder=de.mannodermaus.junit5.AndroidJUnit5Builder,\
        invalid_test_account_token=0000000000000000,\
        partner_auth=${{ secrets.STAGEMOLE_PARTNER_AUTH }}"
    strategy:
      fail-fast: false
      matrix:
        include:
          - test-type: mockapi
            arg-spec-file: mockapi-oss.yml
            path: android/test/mockapi/build/outputs/apk
          - test-type: e2e
            arg-spec-file: e2e-play-stagemole.yml
            path: android/test/e2e/build/outputs/apk
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      # Using v3 due to v4 being very slow for this artifact.
      - uses: actions/download-artifact@v3
        with:
          name: apks
          path: android/app/build/outputs/apk

      # Using v3 due to v4 being very slow for this artifact.
      - uses: actions/download-artifact@v3
        with:
          name: ${{ matrix.test-type }}-instrumentation-apks
          path: ${{ matrix.path }}

      - name: Run tests on Firebase Test Lab
        uses: asadmansr/Firebase-Test-Lab-Action@v1.0
        env:
          SERVICE_ACCOUNT: ${{ secrets.FIREBASE_SERVICE_ACCOUNT }}
        with:
          arg-spec: |
            android/test/firebase/${{ matrix.arg-spec-file }}:default
            --environment-variables ${{ env.FIREBASE_ENVIRONMENT_VARIABLES }}