name: Build Preview

on:
  schedule:
    - cron: '30 0 * * *'
  workflow_dispatch:

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

permissions:
  actions: read
  contents: read

env:
  CI: 'true'
  EXPO_NO_TELEMETRY: '1'
  NODE_ENV: 'production'

jobs:
  check-preview:
    name: Check Preview
    runs-on: ubuntu-24.04
    outputs:
      should-build: ${{ steps.preview.outputs.should-build }}

    steps:
      - name: Check For Existing Preview
        id: preview
        uses: actions/github-script@v8
        with:
          script: |
            if (context.eventName === 'workflow_dispatch') {
              core.notice('Manual dispatch requested; building a new preview.')
              core.setOutput('should-build', 'true')
              return
            }

            const shortSha = context.sha.slice(0, 8)
            const artifactName = `LNReader-${shortSha}`
            const { data: { artifacts } } = await github.rest.actions.listArtifactsForRepo(
              {
                owner: context.repo.owner,
                repo: context.repo.repo,
                name: artifactName,
                per_page: 100,
              },
            )
            const previewExists = artifacts.some(
              artifact =>
                !artifact.expired &&
                artifact.workflow_run?.head_sha === context.sha,
            )

            core.notice(
              previewExists
                ? `A preview artifact already exists for ${shortSha}.`
                : `No preview artifact exists for ${shortSha}; starting a build.`,
            )
            core.setOutput('should-build', String(!previewExists))

  build-android:
    name: APK
    needs: check-preview
    if: needs.check-preview.outputs.should-build == 'true'
    runs-on: ubuntu-24.04
    timeout-minutes: 60

    steps:
      - name: Checkout Repository
        uses: actions/checkout@v7
        with:
          fetch-depth: 0
          persist-credentials: false

      - name: Set Up pnpm
        uses: pnpm/action-setup@v6

      - name: Set Up Node.js
        uses: actions/setup-node@v7
        with:
          node-version: '22'
          cache: pnpm
          cache-dependency-path: pnpm-lock.yaml

      - name: Set Up Java
        uses: actions/setup-java@v5
        with:
          distribution: temurin
          java-version: '17'

      - name: Install Dependencies
        run: pnpm install --frozen-lockfile --prefer-offline

      - name: Configure Release Environment
        env:
          MYANIMELIST_CLIENT_ID: ${{ vars.MYANIMELIST_CLIENT_ID }}
          ANILIST_CLIENT_ID: ${{ vars.ANILIST_CLIENT_ID }}
        run: |
          pnpm generate:env:release \
            --build-type "GitHub Action" \
            --node-env "production"

      - name: Generate Native Android Project
        run: |
          pnpm exec expo prebuild \
            --platform android \
            --clean \
            --no-install \
            --non-interactive

      - name: Configure Gradle
        uses: gradle/actions/setup-gradle@v6
        with:
          cache-provider: enhanced
          cache-read-only: >-
            ${{ github.ref_name != github.event.repository.default_branch }}
          cache-cleanup: on-success
          add-job-summary: always

      - name: Generate Preview Metadata
        run: |
          short_sha="${GITHUB_SHA::8}"
          base_version_name="$(node --print "require('./app.json').expo.version")"
          base_version_code="$(node --print "require('./app.json').expo.android.versionCode")"

          echo "PRERELEASE_VERSION_CODE=$((base_version_code + GITHUB_RUN_NUMBER))" >> "$GITHUB_ENV"
          echo "PRERELEASE_VERSION_NAME=${base_version_name}-pre.r${GITHUB_RUN_NUMBER}.${short_sha}" >> "$GITHUB_ENV"
          echo "PRERELEASE_ARTIFACT_NAME=LNReader-${short_sha}" >> "$GITHUB_ENV"
          echo "PRERELEASE_APK_NAME=LNReader-r${GITHUB_RUN_NUMBER}-${short_sha}.apk" >> "$GITHUB_ENV"

      - name: Build Preview APK
        working-directory: android
        run: |
          mkdir -p app/build/intermediates/sourcemaps/react/preRelease

          ./gradlew :app:assemblePreRelease \
            --build-cache \
            --parallel \
            -PpreReleaseVersionCode="$PRERELEASE_VERSION_CODE" \
            -PpreReleaseVersionName="$PRERELEASE_VERSION_NAME" \
            --stacktrace

          mv \
            app/build/outputs/apk/preRelease/app-preRelease.apk \
            "app/build/outputs/apk/preRelease/$PRERELEASE_APK_NAME"

      - name: Upload Preview Sourcemap
        uses: actions/upload-artifact@v4
        with:
          name: ${{ env.PRERELEASE_ARTIFACT_NAME }}-sourcemap
          path: android/app/build/generated/sourcemaps/react/preRelease/index.android.bundle.map
          if-no-files-found: error
          retention-days: 14
          compression-level: 0
      - name: Upload Preview APK
        id: upload-nightly
        uses: actions/upload-artifact@v4
        with:
          name: ${{ env.PRERELEASE_ARTIFACT_NAME }}
          path: android/app/build/outputs/apk/preRelease/${{ env.PRERELEASE_APK_NAME }}
          if-no-files-found: error
          retention-days: 14
          compression-level: 0

      - name: Check Discord Notification
        id: discord
        env:
          DISCORD_WEBHOOK_URL: ${{ secrets.DISCORD_NIGHTLY_WEBHOOK }}
        run: |
          if [ -n "$DISCORD_WEBHOOK_URL" ]; then
            echo "configured=true" >> "$GITHUB_OUTPUT"
          else
            echo "configured=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Notify Discord
        if: steps.discord.outputs.configured == 'true'
        env:
          DISCORD_WEBHOOK_URL: ${{ secrets.DISCORD_NIGHTLY_WEBHOOK }}
          ARTIFACT_URL: ${{ steps.upload-nightly.outputs.artifact-url }}
        run: |
          short_sha="${GITHUB_SHA::8}"
          message="[${GITHUB_REPOSITORY}] New nightly build published: \`${short_sha}\`"

          payload=$(jq -n \
            --arg title "$message" \
            --arg url "$ARTIFACT_URL" \
            '{
              username: "GitHub",
              avatar_url: "https://github.com/github.png",
              embeds: [{
                author: {
                  name: "github-actions[bot]",
                  icon_url: "https://github.com/github.png"
                },
                title: $title,
                url: $url,
                color: 3092790
              }]
            }')

          curl --fail-with-body \
            --request POST \
            --header "Content-Type: application/json" \
            --data "$payload" \
            "$DISCORD_WEBHOOK_URL"