name: Update Docker Image Tags and Release Helm Chart

on:
  schedule:
    - cron: '0 2 * * 1'
  workflow_dispatch:

jobs:
  update-and-release:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Install Helm
        uses: azure/setup-helm@v3
        with:
          version: 'v3.12.0'

      - name: Check for new nginx version
        id: nginx
        run: |
          set -e
          echo "Checking nginx versions..."
          CURRENT=$(grep -A3 "nginx:" values.yaml | grep "tag:" | head -1 | sed 's/.*tag: *"\([^"]*\)".*/\1/' | tr -d ' ')
          echo "Current nginx: $CURRENT"
          LATEST=$(curl -s "https://registry.hub.docker.com/v2/repositories/library/nginx/tags?page_size=100&name=alpine-perl" | jq -r '.results[].name' | grep -E '^[0-9]+\.[0-9]+\.[0-9]+-alpine-perl$' | sort -V | tail -1)
          if [ -z "$LATEST" ]; then
            echo "Warning: Could not fetch latest nginx version, using current"
            LATEST="$CURRENT"
          fi
          echo "Latest nginx: $LATEST"
          echo "current=$CURRENT" >> $GITHUB_OUTPUT
          echo "latest=$LATEST" >> $GITHUB_OUTPUT

      - name: Check for new PHP version
        id: php
        run: |
          set -e
          echo "Checking PHP versions..."
          CURRENT=$(grep -A3 "php:" values.yaml | grep "tag:" | head -1 | sed 's/.*tag: *"\([^"]*\)".*/\1/' | tr -d ' ')
          echo "Current PHP: $CURRENT"
          LATEST=$(curl -s "https://registry.hub.docker.com/v2/repositories/library/php/tags?page_size=100&name=fpm-alpine" | jq -r '.results[].name' | grep -E '^[0-9]+\.[0-9]+\.[0-9]+-php[0-9]+\.[0-9]+-fpm-alpine$' | sort -V | tail -1)
          if [ -z "$LATEST" ]; then
            echo "Warning: Could not fetch latest PHP version, using current"
            LATEST="$CURRENT"
          fi
          APP_VERSION=$(echo "$LATEST" | grep -oE '^[0-9]+\.[0-9]+\.[0-9]+')
          if [ -z "$APP_VERSION" ]; then
            echo "Error: Could not extract PHP version"
            exit 1
          fi
          echo "Latest PHP: $LATEST"
          echo "PHP version: $APP_VERSION"
          echo "current=$CURRENT" >> $GITHUB_OUTPUT
          echo "latest=$LATEST" >> $GITHUB_OUTPUT
          echo "app_version=$APP_VERSION" >> $GITHUB_OUTPUT

      - name: Determine if update is needed
        id: check_update
        run: |
          set -e
          NGINX_CURRENT="${{ steps.nginx.outputs.current }}"
          NGINX_LATEST="${{ steps.nginx.outputs.latest }}"
          APP_CURRENT="${{ steps.php.outputs.current }}"
          APP_LATEST="${{ steps.php.outputs.latest }}"
          echo "Nginx: $NGINX_CURRENT vs $NGINX_LATEST"
          echo "PHP: $APP_CURRENT vs $APP_LATEST"
          if [ "$NGINX_CURRENT" != "$NGINX_LATEST" ] || [ "$APP_CURRENT" != "$APP_LATEST" ]; then
            echo "update_needed=true" >> $GITHUB_OUTPUT
            echo "Update is needed"
          else
            echo "update_needed=false" >> $GITHUB_OUTPUT
            echo "Already up to date"
          fi

      - name: Update values.yaml
        if: steps.check_update.outputs.update_needed == 'true'
        run: |
          set -e
          echo "Updating values.yaml..."
          NGINX_OLD="${{ steps.nginx.outputs.current }}"
          NGINX_NEW="${{ steps.nginx.outputs.latest }}"
          sed -i "s|tag: \"${NGINX_OLD}\"|tag: \"${NGINX_NEW}\"|g" values.yaml
          APP_OLD="${{ steps.php.outputs.current }}"
          APP_NEW="${{ steps.php.outputs.latest }}"
          sed -i "s|tag: \"${APP_OLD}\"|tag: \"${APP_NEW}\"|g" values.yaml
          echo "values.yaml updated"
          git diff values.yaml

      - name: Update Chart.yaml version
        if: steps.check_update.outputs.update_needed == 'true'
        run: |
          set -e
          APP_VERSION="${{ steps.php.outputs.app_version }}"
          sed -i "s/^version: .*/version: $APP_VERSION/" Chart.yaml
          sed -i "s/^appVersion: .*/appVersion: \"$APP_VERSION\"/" Chart.yaml
          echo "Chart.yaml updated to version $APP_VERSION"
          cat Chart.yaml

      - name: Commit changes
        if: steps.check_update.outputs.update_needed == 'true'
        run: |
          git config user.name "GitHub Actions Bot"
          git config user.email "actions@github.com"
          git add values.yaml Chart.yaml
          git commit -m "chore: update to PHP ${{ steps.php.outputs.app_version }}"
          git push origin main

      - name: Package Helm Chart
        if: steps.check_update.outputs.update_needed == 'true'
        run: |
          helm package .
          echo "Helm chart packaged"

      - name: Create Git Tag
        if: steps.check_update.outputs.update_needed == 'true'
        run: |
          APP_VERSION="${{ steps.php.outputs.app_version }}"
          git tag -a "v$APP_VERSION" -m "Release PHP $APP_VERSION"
          git push origin "v$APP_VERSION"
          echo "Git tag v$APP_VERSION created"

      - name: Create Gitea Release
        if: steps.check_update.outputs.update_needed == 'true'
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
        run: |
          APP_VERSION="${{ steps.php.outputs.app_version }}"
          CHART_NAME=$(grep '^name:' Chart.yaml | awk '{print $2}')
          PACKAGE_FILE="${CHART_NAME}-${APP_VERSION}.tgz"
          RELEASE_BODY="PHP Helm Chart v${APP_VERSION} - Automated release"
          curl -X POST -H "Authorization: token ${GITEA_TOKEN}" -H "Content-Type: application/json" -d "{\"tag_name\":\"v${APP_VERSION}\",\"name\":\"v${APP_VERSION}\",\"body\":\"${RELEASE_BODY}\"}" "${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/releases"
          RELEASE_ID=$(curl -s -H "Authorization: token ${GITEA_TOKEN}" "${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/releases/tags/v${APP_VERSION}" | jq -r '.id')
          curl -X POST -H "Authorization: token ${GITEA_TOKEN}" -H "Content-Type: application/gzip" --data-binary "@${PACKAGE_FILE}" "${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/releases/${RELEASE_ID}/assets?name=${PACKAGE_FILE}"
          echo "Release created"

      - name: Update Helm Repository Index
        if: steps.check_update.outputs.update_needed == 'true'
        run: |
          set -e
          APP_VERSION="${{ steps.php.outputs.app_version }}"
          CHART_NAME=$(grep '^name:' Chart.yaml | awk '{print $2}')
          PACKAGE_FILE="${CHART_NAME}-${APP_VERSION}.tgz"
          
          echo "Preparing Helm repository update..."
          
          # パッケージファイルを一時ディレクトリに移動
          mkdir -p /tmp/helm-repo
          cp "${PACKAGE_FILE}" /tmp/helm-repo/
          
          # gh-pagesブランチの処理
          if git ls-remote --heads origin gh-pages | grep gh-pages; then
            echo "gh-pages branch exists, checking out..."
            git fetch origin gh-pages
            git checkout gh-pages
          else
            echo "Creating new gh-pages branch..."
            git checkout --orphan gh-pages
            git rm -rf . || true
            echo "# Helm Repository" > README.md
            git add README.md
            git config user.name "GitHub Actions Bot"
            git config user.email "actions@github.com"
            git commit -m "Initialize gh-pages branch"
            git push origin gh-pages
          fi
          
          # パッケージファイルをコピー
          cp /tmp/helm-repo/"${PACKAGE_FILE}" .
          
          # index.yamlを生成/更新
          helm repo index . --url "https://gitea.example.com/${GITHUB_REPOSITORY}/raw/branch/gh-pages"
          
          # コミットしてプッシュ
          git config user.name "GitHub Actions Bot"
          git config user.email "actions@github.com"
          git add "${PACKAGE_FILE}" index.yaml
          git commit -m "chore: add ${CHART_NAME} v${APP_VERSION}" || echo "No changes to commit"
          git push origin gh-pages
          
          echo "Helm repository updated successfully"
          
          # mainブランチに戻る
          git checkout main

      - name: Summary
        if: steps.check_update.outputs.update_needed == 'true'
        run: |
          APP_VERSION="${{ steps.php.outputs.app_version }}"
          echo "Update completed to version ${APP_VERSION}"