---
# dance-lessons-coach Unified CI/CD Workflow
# Single, optimized workflow that replaces all previous workflows
# Fast execution with minimal repetition and maximum artifact sharing

name: CI/CD Pipeline

on:
  workflow_dispatch: {}
  push:
    branches:
      - main
      - 'ci/**'
      - 'feature/**'
      - 'fix/**'
      - 'refactor/**'
    paths-ignore:
      - 'README.md'
      - 'doc/**'
      - 'adr/**'
      - '.gitea/**'
      - 'documentation/**'
      - '*.md'
      - '.vibe/**'
      - 'features/**'
  pull_request:
    branches:
      - main
    types: [opened, synchronize, reopened, labeled]
    # Only run PR CI if the commit doesn't already have passing branch CI
    if: |
      github.event_name == 'pull_request' &&
      (github.event.action == 'opened' ||
       github.event.action == 'synchronize' ||
       github.event.action == 'reopened')
    paths-ignore:
      - 'README.md'
      - 'doc/**'
      - 'adr/**'
      - '.gitea/**'
      - 'documentation/**'
      - '*.md'
      - '.vibe/**'
      - 'features/**'

# cancel any previously-started runs of this workflow on the same branch
concurrency:
  group: ${{ github.ref }}-${{ github.workflow }}
  cancel-in-progress: true

# Arcodange-specific environment variables
env:
  GITEA_INTERNAL: "https://gitea.arcodange.lab/"
  GITEA_EXTERNAL: "https://gitea.arcodange.fr/"
  GITEA_ORG: "arcodange"
  GITEA_REPO: "dance-lessons-coach"
  CI_REGISTRY: "gitea.arcodange.lab"

jobs:
  build-cache:
    name: Build Docker Cache
    runs-on: ubuntu-latest-ca
    if: "!contains(github.event.head_commit.message, '[skip ci]') && github.actor != 'ci-bot'"
    outputs:
      deps_hash: ${{ steps.calculate_hash.outputs.deps_hash }}
      cache_hit: ${{ steps.check_cache.outputs.cache_hit }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Calculate dependency hash
        id: calculate_hash
        run: |
          # Calculate hash of go.mod + go.sum (inline, no script needed)
          DEPS_HASH=$(sha256sum go.mod go.sum | sha256sum | cut -d' ' -f1 | head -c 12)
          echo "Dependency hash: $DEPS_HASH"
          echo "deps_hash=$DEPS_HASH" >> $GITHUB_OUTPUT

      - name: Check for existing cache
        id: check_cache
        run: |
          # Check if image exists in registry
          IMAGE_NAME="${{ env.CI_REGISTRY }}/${{ env.GITEA_ORG }}/${{ env.GITEA_REPO }}-build-cache:${{ steps.calculate_hash.outputs.deps_hash }}"
          
          # Try to pull the image to see if it exists
          if docker pull "$IMAGE_NAME" >/dev/null 2>&1; then
            echo "✅ Cache hit - using existing build cache"
            echo "cache_hit=true" >> $GITHUB_OUTPUT
          else
            echo "⚠️  Cache miss - will build new cache image"
            echo "cache_hit=false" >> $GITHUB_OUTPUT
          fi

      - name: Configure Docker to trust Gitea self-signed certificate
        if: steps.check_cache.outputs.cache_hit == 'false'
        run: |
          # Create Docker certs directory for our registry
          sudo mkdir -p /etc/docker/certs.d/${{ env.CI_REGISTRY }}
          
          # Copy the CA certificate that's already available in the runner
          sudo cp /usr/local/share/ca-certificates/root_ca.crt /etc/docker/certs.d/${{ env.CI_REGISTRY }}/ca.crt
          
          # Update CA certificates and restart Docker
          sudo update-ca-certificates
          sudo systemctl restart docker || echo "Docker restart may not be supported in this environment"
          
          echo "✅ Docker configured to trust Gitea registry certificate"

      - name: Login to Gitea Container Registry
        if: steps.check_cache.outputs.cache_hit == 'false'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.CI_REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.PACKAGES_TOKEN }}



      - name: Build and push Docker cache image
        if: steps.check_cache.outputs.cache_hit == 'false'
        run: |
          IMAGE_NAME="${{ env.CI_REGISTRY }}/${{ env.GITEA_ORG }}/${{ env.GITEA_REPO }}-build-cache:${{ steps.calculate_hash.outputs.deps_hash }}"
          echo "Building cache image: $IMAGE_NAME"
          
          # Build the image using traditional docker build
          docker build \
            --file Dockerfile.build \
            --tag "$IMAGE_NAME" \
            .
          
          # Push the image
          docker push "$IMAGE_NAME"

          echo "✅ Build cache image pushed successfully"

  ci-pipeline:
    name: CI Pipeline
    needs: build-cache
    runs-on: ubuntu-latest-ca
    if: "!contains(github.event.head_commit.message, '[skip ci]') && github.actor != 'ci-bot'"
    
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Login to Gitea Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.CI_REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.PACKAGES_TOKEN }}

      - name: Set up build environment
        run: |
          IMAGE_NAME="${{ env.CI_REGISTRY }}/${{ env.GITEA_ORG }}/${{ env.GITEA_REPO }}-build-cache:${{ needs.build-cache.outputs.deps_hash }}"
          echo "Build cache image: $IMAGE_NAME"
          
          # Try to use Docker cache if available
          if docker pull "$IMAGE_NAME" >/dev/null 2>&1; then
            echo "✅ Using Docker build cache"
            echo "CACHE_AVAILABLE=true" >> $GITHUB_ENV
            echo "CACHE_IMAGE=$IMAGE_NAME" >> $GITHUB_ENV
          else
            echo "⚠️  Building without cache (first run or new dependencies)"
            echo "CACHE_AVAILABLE=false" >> $GITHUB_ENV
          fi

      - name: Generate Swagger Docs using Docker cache
        run: |
          if [ "${{ env.CACHE_AVAILABLE }}" = "true" ]; then
            echo "Running in Docker cache..."
            docker run --rm -v "$(pwd):/workspace" -w /workspace ${{ env.CACHE_IMAGE }} sh -c "cd pkg/server && go generate"
          else
            echo "Running natively..."
            cd pkg/server && go generate
          fi

      - name: Build all packages using Docker cache
        run: |
          if [ "${{ env.CACHE_AVAILABLE }}" = "true" ]; then
            echo "Running in Docker cache..."
            docker run --rm -v "$(pwd):/workspace" -w /workspace ${{ env.CACHE_IMAGE }} sh -c "go build ./..."
          else
            echo "Running natively..."
            go build ./...
          fi

      - name: Run tests with coverage using Docker cache
        run: |
          if [ "${{ env.CACHE_AVAILABLE }}" = "true" ]; then
            echo "Running in Docker cache..."
            docker run --rm \
              -v "$(pwd):/workspace" \
              -w /workspace \
              ${{ env.CACHE_IMAGE }} \
              sh -c "go test ./... -coverprofile=coverage.out -v && go tool cover -func=coverage.out > coverage.txt"
          else
            echo "Running natively..."
            go test ./... -coverprofile=coverage.out -v
            go tool cover -func=coverage.out > coverage.txt
          fi
          
          # Extract coverage percentage
          COVERAGE=$(grep "total:" coverage.txt | grep -oP '\d+\.\d+' | head -1)
          echo "Coverage: ${COVERAGE}%"
          
          # Update coverage badge using script
          export PACKAGES_TOKEN="${{ secrets.PACKAGES_TOKEN }}"
          export GITHUB_REF_NAME="${{ github.ref_name }}"
          ./scripts/ci-update-coverage-badge.sh "$COVERAGE"

      - name: Run go fmt
        run: go fmt ./...

      - name: Run swag fmt
        run: swag fmt

      - name: Build binaries
        run: ./scripts/build.sh

      # NOTE: Artifact upload disabled - actions/upload-artifact@v4 not available on Gitea
      # TODO: Replace with Gitea-specific upload action when available
      # - name: Upload Swagger documentation
      #   uses: actions/upload-artifact@v4
      #   with:
      #     name: swagger-docs
      #     path: pkg/server/docs/swagger.json
      #     retention-days: 1

      # Docker build and push (main branch only)
      - name: Login to Gitea Container Registry
        if: github.ref == 'refs/heads/main'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.CI_REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.PACKAGES_TOKEN }}

      - name: Build and push Docker image
        if: github.ref == 'refs/heads/main'
        run: |
          source VERSION
          IMAGE_VERSION="$MAJOR.$MINOR.$PATCH${PRERELEASE:+-$PRERELEASE}"
          
          TAGS="$IMAGE_VERSION latest ${{ github.sha }}"
          echo "Building Docker image with tags: $TAGS"
          
          # Use the production Dockerfile that leverages the build cache
          docker build -t dance-lessons-coach -f Dockerfile.prod .
          
          for TAG in $TAGS; do
            IMAGE_NAME="${{ env.CI_REGISTRY }}/${{ env.GITEA_ORG }}/${{ env.GITEA_REPO }}:$TAG"
            echo "Tagging and pushing: $IMAGE_NAME"
            docker tag dance-lessons-coach "$IMAGE_NAME"
            docker push "$IMAGE_NAME"
          done

      - name: Show published images
        if: github.ref == 'refs/heads/main'
        run: |
          source VERSION
          IMAGE_VERSION="$MAJOR.$MINOR.$PATCH${PRERELEASE:+-$PRERELEASE}"
          echo "📦 Published Docker images:"
          echo "  - ${{ env.CI_REGISTRY }}/${{ env.GITEA_ORG }}/${{ env.GITEA_REPO }}:$IMAGE_VERSION"
          echo "  - ${{ env.CI_REGISTRY }}/${{ env.GITEA_ORG }}/${{ env.GITEA_REPO }}:latest"
          echo "  - ${{ env.CI_REGISTRY }}/${{ env.GITEA_ORG }}/${{ env.GITEA_REPO }}:${{ github.sha }}"