name: Build and Release Android APK

# Required repository secrets:
#   RELEASE_KEYSTORE_BASE64  — base64-encoded release keystore file
#                              Generate: base64 -i my-release-key.keystore | pbcopy
#   KEYSTORE_PASSWORD        — keystore store password
#   KEY_ALIAS                — key alias inside the keystore
#   KEY_PASSWORD             — key password

on:
  push:
    tags:
      - 'v*.*.*'
  workflow_dispatch:
    inputs:
      version:
        description: 'Version tag (e.g., v0.1.0-alpha)'
        required: true
        default: 'v0.1.0-alpha'

permissions:
  contents: write

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'

      - name: Setup Bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: latest

      - name: Setup Java 17
        uses: actions/setup-java@v4
        with:
          distribution: 'temurin'
          java-version: '17'

      - name: Setup Android SDK
        uses: android-actions/setup-android@v3

      # Cache Gradle wrapper + caches to dramatically speed up subsequent builds
      - name: Cache Gradle
        uses: actions/cache@v4
        with:
          path: |
            ~/.gradle/caches
            ~/.gradle/wrapper
          key: gradle-${{ runner.os }}-${{ hashFiles('android/**/*.gradle*', 'android/gradle/wrapper/gradle-wrapper.properties') }}
          restore-keys: gradle-${{ runner.os }}-

      # Cache node_modules to skip re-installing unchanged deps
      - name: Cache node_modules
        uses: actions/cache@v4
        with:
          path: node_modules
          key: bun-${{ runner.os }}-${{ hashFiles('bun.lockb') }}
          restore-keys: bun-${{ runner.os }}-

      - name: Install JS dependencies
        run: bun install --frozen-lockfile

      - name: Make gradlew executable
        run: chmod +x android/gradlew

      # Decode the base64 keystore secret and write keystore.properties so
      # android/app/build.gradle can pick up the release signing credentials.
      - name: Configure release signing
        env:
          RELEASE_KEYSTORE_BASE64: ${{ secrets.RELEASE_KEYSTORE_BASE64 }}
          KEYSTORE_PASSWORD: ${{ secrets.KEYSTORE_PASSWORD }}
          KEY_ALIAS: ${{ secrets.KEY_ALIAS }}
          KEY_PASSWORD: ${{ secrets.KEY_PASSWORD }}
        run: |
          echo "$RELEASE_KEYSTORE_BASE64" | base64 --decode > android/app/expensso-release.keystore
          {
            echo "storeFile=$(pwd)/android/app/expensso-release.keystore"
            echo "storePassword=$KEYSTORE_PASSWORD"
            echo "keyAlias=$KEY_ALIAS"
            echo "keyPassword=$KEY_PASSWORD"
          } > android/keystore.properties

      - name: Get version from package.json
        id: pkg
        run: |
          VERSION=$(node -p "require('./package.json').version")
          echo "version=$VERSION" >> $GITHUB_OUTPUT

      - name: Build release APKs
        run: bun run build:release

      # ABI splits produce multiple APKs; rename them all for clarity.
      # Outputs: Expensso-v0.1.0-alpha-arm64-v8a.apk, Expensso-v0.1.0-alpha-universal.apk, etc.
      - name: Rename APKs
        run: |
          VERSION="${{ steps.pkg.outputs.version }}"
          APK_DIR="android/app/build/outputs/apk/release"
          for apk in "$APK_DIR"/app-*-release.apk; do
            base=$(basename "$apk")
            # Strip leading "app-" and trailing "-release.apk", add our prefix
            abi="${base#app-}"
            abi="${abi%-release.apk}"
            mv "$apk" "$APK_DIR/Expensso-v${VERSION}-${abi}.apk"
          done

      - name: Create GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ github.event.inputs.version || github.ref_name }}
          name: Expensso v${{ steps.pkg.outputs.version }}
          draft: false
          prerelease: false
          files: android/app/build/outputs/apk/release/Expensso-*.apk
          body: |
            ## Expensso v${{ steps.pkg.outputs.version }}

            ### APK variants
            | File | Recommended for |
            |------|----------------|
            | `Expensso-v${{ steps.pkg.outputs.version }}-universal.apk` | Any device (largest) |
            | `Expensso-v${{ steps.pkg.outputs.version }}-arm64-v8a.apk` | Modern phones (64-bit) |
            | `Expensso-v${{ steps.pkg.outputs.version }}-armeabi-v7a.apk` | Older phones (32-bit) |
            | `Expensso-v${{ steps.pkg.outputs.version }}-x86_64.apk` | x86 emulators / Chromebooks |

            ### Installation
            1. Download the APK for your device (universal if unsure).
            2. Enable **Install from unknown sources** in device settings.
            3. Open the downloaded APK to install.
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}