name: Release and Build Docker Images

on:
  push:
    branches:
      - main
  # Allow manual trigger
  workflow_dispatch:

env:
  REGISTRY: git.almazlar.com
  OWNER: ${{ gitea.repository_owner }}

jobs:
  release-and-build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.ACCESS_TOKEN }}

      - name: Git Configuration
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Generate Version and Changelog
        id: generate
        run: |
          # 1. Fetch the latest tag
          LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
          echo "Latest tag: $LATEST_TAG"

          # 2. Calculate the next patch version
          if [[ $LATEST_TAG == v* ]]; then
            VERSION_NUM=${LATEST_TAG:1}
            IFS='.' read -r MAJOR MINOR PATCH <<< "$VERSION_NUM"
            PATCH=$((PATCH + 1))
            NEW_TAG="v$MAJOR.$MINOR.$PATCH"
          else
             # Fallback if the tag format is unrecognized
             NEW_TAG="v0.0.1"
          fi
          
          echo "New tag: $NEW_TAG"
          echo "new_tag=$NEW_TAG" >> $GITHUB_OUTPUT

          # 3. Create a temporary file for the new changelog entry
          TEMP_CHANGELOG=$(mktemp)
          DATE=$(date +'%Y-%m-%d')
          
          echo "## [$NEW_TAG] - $DATE" > "$TEMP_CHANGELOG"
          echo "" >> "$TEMP_CHANGELOG"
          
          # Fetch all commit messages since the latest tag to HEAD
          if [ "$LATEST_TAG" = "v0.0.0" ]; then
             git log --pretty=format:"* %s (%h)" >> "$TEMP_CHANGELOG"
          else
             git log ${LATEST_TAG}..HEAD --pretty=format:"* %s (%h)" >> "$TEMP_CHANGELOG"
          fi
          
          echo "" >> "$TEMP_CHANGELOG"
          echo "" >> "$TEMP_CHANGELOG"

          # 4. Prepend the new entry to the existing CHANGELOG.md
          if [ -f CHANGELOG.md ]; then
            cat CHANGELOG.md >> "$TEMP_CHANGELOG"
          fi
          
          mv "$TEMP_CHANGELOG" CHANGELOG.md
          
          echo "Changelog generated successfully."

      - name: Commit and Push Changes
        run: |
          NEW_TAG=${{ steps.generate.outputs.new_tag }}
          
          # Add the updated changelog
          git add CHANGELOG.md
          
          # Only commit if there are changes
          if ! git diff-index --quiet HEAD; then
             git commit -m "chore(release): bump version to $NEW_TAG and update changelog [skip ci]"
             
             # Create the new tag
             git tag -a "$NEW_TAG" -m "Release $NEW_TAG"
             
             # Push the commit and the new tag
             git push origin main
             git push origin "$NEW_TAG"
          else
             echo "No changes to commit."
             # If we haven't already tagged this commit, do it now
             if ! git ls-remote --tags origin | grep -q "refs/tags/$NEW_TAG"; then
               git tag -a "$NEW_TAG" -m "Release $NEW_TAG"
               git push origin "$NEW_TAG"
             fi
          fi

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ gitea.actor }}
          password: ${{ secrets.ACCESS_TOKEN }}

      - name: Extract metadata (tags, labels) for Backend
        id: meta-backend
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.OWNER }}/todo-backend
          tags: |
            type=raw,value=latest
            type=raw,value=${{ steps.generate.outputs.new_tag }}

      - name: Build and push Backend image
        uses: docker/build-push-action@v5
        with:
          context: ./backend
          push: true
          tags: ${{ steps.meta-backend.outputs.tags }}
          labels: ${{ steps.meta-backend.outputs.labels }}

      - name: Extract metadata (tags, labels) for Frontend
        id: meta-frontend
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.OWNER }}/todo-frontend
          tags: |
            type=raw,value=latest
            type=raw,value=${{ steps.generate.outputs.new_tag }}

      - name: Build and push Frontend image
        uses: docker/build-push-action@v5
        with:
          context: ./frontend
          push: true
          tags: ${{ steps.meta-frontend.outputs.tags }}
          labels: ${{ steps.meta-frontend.outputs.labels }}