name: Reusable Android Check

on:
  workflow_call:
    inputs:
      run_lint:
        type: boolean
        default: true
      run_unit_tests:
        type: boolean
        default: true
      run_coverage:
        type: boolean
        default: true
      run_desktop_builds:
        type: boolean
        default: true
      upload_artifacts:
        type: boolean
        default: true
    secrets:
      GRADLE_ENCRYPTION_KEY:
        required: false
      CODECOV_TOKEN:
        required: false
      DATADOG_APPLICATION_ID:
        required: false
      DATADOG_CLIENT_TOKEN:
        required: false
      GOOGLE_MAPS_API_KEY:
        required: false
      GRADLE_CACHE_URL:
        required: false
      GRADLE_CACHE_USERNAME:
        required: false
      GRADLE_CACHE_PASSWORD:
        required: false

env:
  DATADOG_APPLICATION_ID: ${{ secrets.DATADOG_APPLICATION_ID }}
  DATADOG_CLIENT_TOKEN: ${{ secrets.DATADOG_CLIENT_TOKEN }}
  MAPS_API_KEY: ${{ secrets.GOOGLE_MAPS_API_KEY }}
  GITHUB_TOKEN: ${{ github.token }}
  GRADLE_CACHE_URL: ${{ secrets.GRADLE_CACHE_URL }}
  GRADLE_CACHE_USERNAME: ${{ secrets.GRADLE_CACHE_USERNAME }}
  GRADLE_CACHE_PASSWORD: ${{ secrets.GRADLE_CACHE_PASSWORD }}
  # Fallback VERSION_CODE for the lint-check job itself (which computes the real
  # value from git). Downstream jobs override this with the git-derived value.
  VERSION_CODE: ${{ github.run_number }}

jobs:
  # ── Lint & Static Analysis ──────────────────────────────────────────
  lint-check:
    runs-on: ubuntu-24.04
    permissions:
      contents: read
    timeout-minutes: 30
    outputs:
      cache_read_only: ${{ steps.cache_config.outputs.cache_read_only }}
      version_code: ${{ steps.version_code.outputs.version_code }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v6
        with:
          fetch-depth: 0
          filter: 'blob:none'
          submodules: true

      - name: Determine cache read-only setting
        id: cache_config
        shell: bash
        run: |
          if [[ "${{ github.ref }}" == "refs/heads/main" ]] || [[ "${{ github.event_name }}" == "merge_group" ]] || [[ "${{ github.ref }}" == gh-readonly-queue/* ]]; then
            echo "cache_read_only=false" >> "$GITHUB_OUTPUT"
          else
            echo "cache_read_only=true" >> "$GITHUB_OUTPUT"
          fi

      - name: Calculate version code from git commit count
        id: version_code
        shell: bash
        run: |
          COMMIT_COUNT=$(git rev-list --count HEAD)
          OFFSET=$(grep '^VERSION_CODE_OFFSET=' config.properties | cut -d'=' -f2 || echo 0)
          VERSION_CODE=$((COMMIT_COUNT + OFFSET))
          echo "version_code=$VERSION_CODE" >> "$GITHUB_OUTPUT"

      - name: Gradle Setup
        uses: ./.github/actions/gradle-setup
        with:
          gradle_encryption_key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
          cache_read_only: ${{ steps.cache_config.outputs.cache_read_only }}

      - name: Lint, Analysis & KMP Smoke Compile
        if: inputs.run_lint == true
        run: ./gradlew spotlessCheck detekt app:lintFdroidDebug app:lintGoogleDebug core:barcode:lintFdroidDebug core:barcode:lintGoogleDebug core:api:lintDebug kmpSmokeCompile -Pci=true --continue --scan

      - name: KMP Smoke Compile (lint skipped)
        if: inputs.run_lint == false
        run: ./gradlew kmpSmokeCompile -Pci=true --continue --scan

  # ── Reproducible Build Verification ─────────────────────────────────
  rb-check:
    runs-on: ubuntu-24.04
    permissions:
      contents: read
    timeout-minutes: 30
    if: inputs.run_lint == true

    steps:
      - name: Checkout code
        uses: actions/checkout@v6
        with:
          fetch-depth: 1
          submodules: true

      - name: Gradle Setup
        uses: ./.github/actions/gradle-setup
        with:
          gradle_encryption_key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
          cache_read_only: 'true'

      - name: Verify Reproducible Build (fdroid)
        env:
          VERSION_CODE: ${{ github.run_number }}
        run: |
          # Comprehensive RB verification for F-Droid/IzzyOnDroid.
          # Based on: https://izzyondroid.org/docs/reproducibleBuilds/DebugFailedRBs/
          # Catches regressions that have historically broken reproducibility:
          #   1. aboutlibraries.json non-determinism (network fetching)
          #   2. Datadog buildId leaking into fdroid APK
          #   3. Google/Firebase/GMS/MLKit classes in fdroid APK
          #   4. DEPENDENCY_INFO_BLOCK in signing block
          #   5. Native library stripping (NDK version mismatch)
          #   6. aboutlibraries "generated" timestamp in res/M7.json
          #   7. baseline.prof determinism (flaky builds)
          # See: https://github.com/meshtastic/Meshtastic-Android/issues/3231

          echo "── Step 1: Verify aboutlibraries.json determinism ──"
          rm -f app/src/main/resources/aboutlibraries.json
          ./gradlew :app:exportLibraryDefinitions -Pci=true --no-configuration-cache
          cp app/src/main/resources/aboutlibraries.json /tmp/aboutlibraries-run1.json

          rm -f app/src/main/resources/aboutlibraries.json
          ./gradlew :app:exportLibraryDefinitions -Pci=true --no-configuration-cache --rerun-tasks
          cp app/src/main/resources/aboutlibraries.json /tmp/aboutlibraries-run2.json

          if ! diff -q /tmp/aboutlibraries-run1.json /tmp/aboutlibraries-run2.json; then
            echo "::error::aboutlibraries.json is NOT deterministic across runs!"
            diff /tmp/aboutlibraries-run1.json /tmp/aboutlibraries-run2.json | head -20
            exit 1
          fi
          echo "✅ aboutlibraries.json is deterministic"

          echo "── Step 2: Build fdroid release APK ──"
          ./gradlew :app:assembleFdroidRelease -Pci=true -Pmeshtastic.disableAbiSplits=true --no-configuration-cache

          APK=$(find app/build/outputs/apk/fdroid/release -name "*.apk" | head -1)
          if [ -z "$APK" ]; then
            echo "::error::No fdroid release APK found"
            exit 1
          fi
          echo "Checking APK: $APK"

          echo "── Step 3: Check for datadog.buildId ──"
          if unzip -l "$APK" | grep -q "datadog.buildId"; then
            echo "::error::fdroid APK contains assets/datadog.buildId — breaks RB!"
            exit 1
          fi
          echo "✅ No datadog.buildId in fdroid APK"

          echo "── Step 4: Check for proprietary libraries (dex scan) ──"
          TMPDIR=$(mktemp -d)
          unzip -q "$APK" -d "$TMPDIR"
          OFFENDERS=""
          for pattern in "com/google/firebase" "com/google/android/gms" "com/crashlytics" "com/google/mlkit" "com/google/android/datatransport" "androidx/privacysandbox/ads"; do
            for dex in "$TMPDIR"/classes*.dex; do
              if [ -f "$dex" ] && strings "$dex" | grep -q "L${pattern}/"; then
                OFFENDERS="${OFFENDERS}\n  - $pattern"
                break
              fi
            done
          done

          if [ -n "$OFFENDERS" ]; then
            echo -e "::error::fdroid APK contains proprietary libraries:${OFFENDERS}"
            rm -rf "$TMPDIR"
            exit 1
          fi
          echo "✅ No proprietary libraries in fdroid APK"

          echo "── Step 5: Check for DEPENDENCY_INFO_BLOCK (signing block blob) ──"
          # Parse the APK Signing Block structure to find the dependency info pair.
          # Naive byte scans produce false positives in large APKs.
          if python3 << 'PYEOF'
          import struct, sys

          with open("$APK", "rb") as f:
              data = f.read()

          magic = b"APK Sig Block 42"
          idx = data.rfind(magic)
          if idx < 0:
              sys.exit(0)

          block_size = struct.unpack_from("<Q", data, idx - 8)[0]
          block_start = idx + 16 - 8 - block_size
          pos = int(block_start)
          end = idx - 8

          while pos + 12 <= end:
              pair_size = struct.unpack_from("<Q", data, pos)[0]
              pair_id = struct.unpack_from("<I", data, pos + 8)[0]
              if pair_id == 0x504b4453:
                  print(f"DEPENDENCY_INFO_BLOCK found (id=0x{pair_id:08x})")
                  sys.exit(1)
              pos += 8 + int(pair_size)

          sys.exit(0)
          PYEOF
          then
            echo "::error::fdroid APK contains DEPENDENCY_INFO_BLOCK — remove with dependenciesInfo { includeInApk = false }"
            rm -rf "$TMPDIR"
            exit 1
          fi
          echo "✅ No DEPENDENCY_INFO_BLOCK in signing block"

          echo "── Step 6: Check native libraries have debug symbols (not stripped) ──"
          STRIPPED_LIBS=""
          for so in $(find "$TMPDIR" -name "*.so" 2>/dev/null); do
            # If .symtab section is missing, the library was stripped
            if ! readelf -S "$so" 2>/dev/null | grep -q "\.symtab"; then
              # Libraries without symtab are stripped — this is only a problem
              # if keepDebugSymbols is not working as expected
              LIB_NAME=$(basename "$so")
              STRIPPED_LIBS="${STRIPPED_LIBS} ${LIB_NAME}"
            fi
          done
          # Note: Some third-party .so files arrive pre-stripped, which is OK.
          # We only warn here; a hard failure would be too aggressive.
          if [ -n "$STRIPPED_LIBS" ]; then
            echo "::warning::Some native libraries appear stripped (may cause NDK-version-dependent RB failures):${STRIPPED_LIBS}"
          else
            echo "✅ Native libraries retain debug symbols"
          fi

          echo "── Step 7: Check aboutlibraries 'generated' timestamp not in APK ──"
          # The M7.json (or aboutlibraries.json in Java resources) should NOT contain
          # a "generated" field, which introduces a build-time timestamp.
          ABOUT_JSON=""
          if [ -f "$TMPDIR/aboutlibraries.json" ]; then
            ABOUT_JSON="$TMPDIR/aboutlibraries.json"
          else
            # May be in res/ as M7.json or similar
            ABOUT_JSON=$(find "$TMPDIR/res" -name "*.json" -exec grep -l "aboutLibraries" {} \; 2>/dev/null | head -1)
          fi
          if [ -n "$ABOUT_JSON" ] && grep -q '"generated"' "$ABOUT_JSON"; then
            echo "::error::aboutlibraries contains 'generated' timestamp field — add excludeFields = listOf(\"generated\") to build config"
            rm -rf "$TMPDIR"
            exit 1
          fi
          echo "✅ No 'generated' timestamp in aboutlibraries data"

          echo "── Step 8: Verify build from clean tree (version-control-info) ──"
          if [ -f "$TMPDIR/META-INF/version-control-info.textproto" ]; then
            if grep -q "modified: true" "$TMPDIR/META-INF/version-control-info.textproto"; then
              echo "::warning::APK built from dirty tree (version-control-info shows modified:true). Release builds must use a clean tree."
            else
              echo "✅ Built from clean tree"
            fi
          else
            echo "ℹ️ No version-control-info.textproto (AGP may not embed it for debug-signed builds)"
          fi

          rm -rf "$TMPDIR"
          echo ""
          echo "🎉 All RB checks passed"

  # ── Sharded Unit Tests ──────────────────────────────────────────────
  # Tests are split into 3 shards that run in parallel:
  #   shard-core:    core:* KMP module tests (allTests)
  #   shard-feature: feature:* KMP module tests (allTests)
  #   shard-app:     Pure-Android/JVM tests (app, desktop, core:barcode, etc.)
  test-shards:
    runs-on: ubuntu-24.04
    permissions:
      contents: read
    timeout-minutes: 45
    needs: lint-check
    if: inputs.run_unit_tests == true
    env:
      VERSION_CODE: ${{ needs.lint-check.outputs.version_code }}
    strategy:
      fail-fast: false
      matrix:
        shard:
          - name: shard-core
            tasks: >-
              :core:ble:allTests
              :core:common:allTests
              :core:data:allTests
              :core:database:allTests
              :core:domain:allTests
              :core:model:allTests
              :core:navigation:allTests
              :core:network:allTests
              :core:prefs:allTests
              :core:repository:allTests
              :core:service:allTests
              :core:takserver:allTests
              :core:testing:allTests
              :core:ui:allTests
            kover: >-
              :core:ble:koverXmlReport
              :core:common:koverXmlReport
              :core:data:koverXmlReport
              :core:database:koverXmlReport
              :core:domain:koverXmlReport
              :core:model:koverXmlReport
              :core:navigation:koverXmlReport
              :core:network:koverXmlReport
              :core:prefs:koverXmlReport
              :core:repository:koverXmlReport
              :core:service:koverXmlReport
              :core:takserver:koverXmlReport
              :core:testing:koverXmlReport
              :core:ui:koverXmlReport
          - name: shard-feature
            tasks: >-
              :feature:connections:allTests
              :feature:firmware:allTests
              :feature:intro:allTests
              :feature:map:allTests
              :feature:messaging:allTests
              :feature:node:allTests
              :feature:settings:allTests
            kover: >-
              :feature:connections:koverXmlReport
              :feature:firmware:koverXmlReport
              :feature:intro:koverXmlReport
              :feature:map:koverXmlReport
              :feature:messaging:koverXmlReport
              :feature:node:koverXmlReport
              :feature:settings:koverXmlReport
          - name: shard-app
            tasks: >-
              :app:testFdroidDebugUnitTest
              :app:testGoogleDebugUnitTest
              :desktop:test
              :core:barcode:testFdroidDebugUnitTest
              :core:barcode:testGoogleDebugUnitTest
            kover: >-
              :app:koverXmlReportFdroidDebug
              :app:koverXmlReportGoogleDebug
              :core:barcode:koverXmlReportFdroidDebug
              :core:barcode:koverXmlReportGoogleDebug
              :desktop:koverXmlReport

    steps:
      - name: Checkout code
        uses: actions/checkout@v6
        with:
          fetch-depth: 1
          submodules: true

      - name: Gradle Setup
        uses: ./.github/actions/gradle-setup
        with:
          gradle_encryption_key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
          cache_read_only: ${{ needs.lint-check.outputs.cache_read_only }}

      - name: Run Tests & Coverage (${{ matrix.shard.name }})
        run: |
          kover_tasks=""
          if [[ "${{ inputs.run_coverage }}" == "true" ]]; then
            kover_tasks="${{ matrix.shard.kover }}"
          fi
          ./gradlew ${{ matrix.shard.tasks }} $kover_tasks -Pci=true --continue --scan

      - name: Upload test results to Codecov
        if: ${{ !cancelled() }}
        uses: codecov/codecov-action@v6
        with:
          token: ${{ secrets.CODECOV_TOKEN }}
          slug: meshtastic/Meshtastic-Android
          flags: ${{ matrix.shard.name }}
          fail_ci_if_error: false
          report_type: test_results
          files: "**/build/test-results/**/*.xml"

      - name: Upload coverage to Codecov
        if: ${{ !cancelled() && inputs.run_coverage }}
        uses: codecov/codecov-action@v6
        with:
          token: ${{ secrets.CODECOV_TOKEN }}
          slug: meshtastic/Meshtastic-Android
          flags: ${{ matrix.shard.name }}
          fail_ci_if_error: false
          files: "**/build/reports/kover/report*.xml"

      - name: Upload shard reports
        if: ${{ always() && inputs.upload_artifacts }}
        uses: actions/upload-artifact@v7
        with:
          name: reports-${{ matrix.shard.name }}
          path: |
            **/build/reports
            **/build/test-results
          retention-days: 7

  # ── Android Build ────────────────────────────────────────────────────
  android-check:
    runs-on: ubuntu-24.04
    permissions:
      contents: read
    timeout-minutes: 60
    needs: lint-check
    env:
      VERSION_CODE: ${{ needs.lint-check.outputs.version_code }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v6
        with:
          fetch-depth: 1
          submodules: true

      - name: Gradle Setup
        uses: ./.github/actions/gradle-setup
        with:
          gradle_encryption_key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
          cache_read_only: ${{ needs.lint-check.outputs.cache_read_only }}

      - name: Build Android APKs
        run: ./gradlew app:assembleFdroidDebug app:assembleGoogleDebug -Pci=true --parallel --configuration-cache --continue --scan

      - name: Upload debug artifact
        if: ${{ inputs.upload_artifacts }}
        uses: actions/upload-artifact@v7
        with:
          name: app-debug-apks
          path: app/build/outputs/apk/*/debug/*.apk
          retention-days: 7

      - name: Report App Size
        if: always()
        run: |
          echo "### App Size Report" >> $GITHUB_STEP_SUMMARY
          echo "| Artifact | Size |" >> $GITHUB_STEP_SUMMARY
          echo "| --- | --- |" >> $GITHUB_STEP_SUMMARY
          find app/build/outputs/apk -name "*.apk" -exec du -h {} + | awk '{print "| " $2 " | " $1 " |"}' >> $GITHUB_STEP_SUMMARY

  # ── Desktop Build ───────────────────────────────────────────────────
  build-desktop:
    name: Build Desktop Debug (${{ matrix.os }})
    if: inputs.run_desktop_builds == true
    runs-on: ${{ matrix.os }}
    permissions:
      contents: read
    timeout-minutes: 60
    needs: lint-check
    strategy:
      fail-fast: false
      matrix:
        os: [macos-latest, windows-latest, ubuntu-24.04, ubuntu-24.04-arm]
    env:
      VERSION_CODE: ${{ needs.lint-check.outputs.version_code }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v6
        with:
          fetch-depth: 1
          submodules: true

      - name: Gradle Setup
        uses: ./.github/actions/gradle-setup
        with:
          gradle_encryption_key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
          cache_read_only: ${{ needs.lint-check.outputs.cache_read_only }}

      - name: Build Desktop
        run: ./gradlew :desktop:createDistributable -Pci=true --scan

      - name: Upload Desktop artifact
        if: ${{ inputs.upload_artifacts }}
        uses: actions/upload-artifact@v7
        with:
          name: desktop-app-${{ runner.os }}-${{ runner.arch }}
          path: desktop/build/compose/binaries/main/app/
          retention-days: 7