name: Screenshots

on:
  workflow_dispatch:
  schedule:
    # Weekly refresh so README screenshots do not drift too far from the UI.
    - cron: '0 4 * * 1'

permissions:
  contents: write

concurrency:
  group: screenshots-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build:
    name: Build debug APKs
    runs-on: ubuntu-latest
    timeout-minutes: 30
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          submodules: 'recursive'
          fetch-depth: 0
      - name: Setup Java
        uses: actions/setup-java@v6
        with:
          distribution: 'temurin'
          java-version: '21'
      - name: Setup Rust
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: aarch64-linux-android,armv7-linux-androideabi,i686-linux-android,x86_64-linux-android
      - name: Cache Rust
        uses: Swatinem/rust-cache@v2
        with:
          workspaces: rust
      - name: Install cargo-ndk
        run: cargo install cargo-ndk --locked
      - name: Setup Android SDK
        run: |
          yes | $ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager --licenses > /dev/null || true
          $ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager --channel=3 \
            "platforms;android-37.0" \
            "build-tools;37.0.0" \
            "ndk;29.0.14206865"
      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v6
      - name: Configure Gradle
        run: |
          echo 'android.sdk.channel=3' >> gradle.properties
          echo 'android.native.buildOutput=verbose' >> gradle.properties
          echo 'org.gradle.caching=true' >> gradle.properties
          echo 'org.gradle.parallel=true' >> gradle.properties
      - name: Build debug APKs
        run: ./gradlew :manager:assembleDebug :shizutest:assembleDebug
      - name: Stage APKs
        run: |
          mkdir -p artifacts/apk
          cp "$(ls out/apk/*-debug.apk | head -n 1)" artifacts/apk/nightzuku-debug.apk
          cp shizutest/build/outputs/apk/debug/shizutest-debug.apk artifacts/apk/shizutest-debug.apk
          ls -lh artifacts/apk
      - name: Upload APKs
        uses: actions/upload-artifact@v7
        with:
          name: screenshot-apks
          path: artifacts/apk/
          if-no-files-found: error
          overwrite: true

  capture:
    name: Capture ${{ matrix.screen }}
    needs: build
    runs-on: ubuntu-latest
    timeout-minutes: 45
    strategy:
      fail-fast: false
      matrix:
        include:
          # Android 17 (API 37 preview, canary SDK channel)
          - screen: phone
            api: '37.0'
            target: google_apis
            device: pixel_6
          # Wear OS 7 (API 37 preview, signed Wear image)
          - screen: wearos
            api: '37.0'
            target: android-wear-signed
            device: wearos_small_round
          # Android TV 16 (API 36)
          - screen: tv
            api: '36'
            target: android-tv
            device: tv_1080p
    env:
      SCREEN: ${{ matrix.screen }}
      API_LEVEL: ${{ matrix.api }}
      IMAGE_TARGET: ${{ matrix.target }}
      DEVICE_PROFILE: ${{ matrix.device }}
    steps:
      - name: Checkout
        uses: actions/checkout@v7
      - name: Download APKs
        uses: actions/download-artifact@v8
        with:
          name: screenshot-apks
          path: artifacts/apk
      - name: Enable KVM
        run: |
          echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
          sudo udevadm control --reload-rules
          sudo udevadm trigger --name-match=kvm
      - name: Install emulator and system image
        run: |
          SDKMANAGER="$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager"
          yes | "$SDKMANAGER" --licenses > /dev/null || true
          "$SDKMANAGER" --channel=3 \
            "platform-tools" \
            "emulator" \
            "system-images;android-${API_LEVEL};${IMAGE_TARGET};x86_64"
          echo "$ANDROID_HOME/platform-tools" >> "$GITHUB_PATH"
      - name: Create AVD
        run: |
          echo no | "$ANDROID_HOME/cmdline-tools/latest/bin/avdmanager" create avd \
            -n screenshot \
            -k "system-images;android-${API_LEVEL};${IMAGE_TARGET};x86_64" \
            --device "${DEVICE_PROFILE}" \
            --force
      - name: Boot emulator and capture
        run: |
          set -euo pipefail
          "$ANDROID_HOME/emulator/emulator" -avd screenshot \
            -no-window -no-audio -no-boot-anim -no-snapshot \
            -gpu swiftshader_indirect -accel on \
            -camera-back none -camera-front none \
            > emulator.log 2>&1 &
          EMULATOR_PID=$!
          trap 'kill "$EMULATOR_PID" 2>/dev/null || true' EXIT
          adb wait-for-device
          timeout 420 bash -c 'until [ "$(adb shell getprop sys.boot_completed 2>/dev/null | tr -d "\r")" = "1" ]; do sleep 2; done'
          adb shell settings put secure user_setup_complete 1 || true
          adb shell settings put global device_provisioned 1 || true
          adb shell input keyevent 82 || true
          ./scripts/capture-screenshots.sh "${SCREEN}"
      - name: Upload emulator log on failure
        if: failure()
        uses: actions/upload-artifact@v7
        with:
          name: emulator-log-${{ matrix.screen }}
          path: emulator.log
          if-no-files-found: warn
          overwrite: true
      - name: Upload screenshots
        uses: actions/upload-artifact@v7
        with:
          name: screenshots-${{ matrix.screen }}
          path: artifacts/screenshots/${{ matrix.screen }}/
          if-no-files-found: error
          overwrite: true

  publish:
    name: Update README screenshots
    needs: capture
    runs-on: ubuntu-latest
    timeout-minutes: 10
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          fetch-depth: 0
      - name: Download screenshots
        uses: actions/download-artifact@v8
        with:
          path: artifacts
      - name: Update screenshot directories
        run: |
          set -euo pipefail
          for screen in phone wearos tv; do
            mkdir -p "screenshots/${screen}"
            cp -R "artifacts/screenshots-${screen}/." "screenshots/${screen}/"
          done
          git status --short screenshots
      - name: Commit and push
        run: |
          set -euo pipefail
          git add screenshots
          if git diff --cached --quiet; then
            echo "No screenshot changes to commit."
            exit 0
          fi
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git commit -m "chore(screenshots): refresh emulator screenshots"
          git push origin "HEAD:${GITHUB_REF_NAME}"