name: Version Bump

on:
  pull_request:
    types: [labeled]

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

jobs:
  version-bump:
    if: github.event.label.name == 'version:patch' || github.event.label.name == 'version:minor' || github.event.label.name == 'version:major'
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Setup Git
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
      - name: Detect version bump type
        id: version-type
        run: |
          if [[ "${{ github.event.label.name }}" == "version:patch" ]]; then
            echo "bump_type=patch" >> $GITHUB_OUTPUT
          elif [[ "${{ github.event.label.name }}" == "version:minor" ]]; then
            echo "bump_type=minor" >> $GITHUB_OUTPUT
          elif [[ "${{ github.event.label.name }}" == "version:major" ]]; then
            echo "bump_type=major" >> $GITHUB_OUTPUT
          else
            echo "Invalid version label: ${{ github.event.label.name }}"
            exit 1
          fi
      - name: Detect modified modules
        id: detect-modules
        run: |
          CHANGED_FILES=$(git diff --name-only origin/main...HEAD)
          MODULES=$(echo "$CHANGED_FILES" | grep -E '^registry/[^/]+/modules/[^/]+/' | cut -d'/' -f1-4 | sort -u)
          
          if [ -z "$MODULES" ]; then
            echo "No modules detected in changes"
            exit 1
          fi
          
          echo "Found modules:"
          echo "$MODULES"
          echo "modules<<EOF" >> $GITHUB_OUTPUT
          echo "$MODULES" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT
      - name: Process version bumps
        id: process-bumps
        run: |
          BUMP_TYPE="${{ steps.version-type.outputs.bump_type }}"
          BUMPED_MODULES=""
          UPDATED_READMES=""
          UNTAGGED_MODULES=""
          
          while IFS= read -r module_path; do
            if [ -z "$module_path" ]; then continue; fi
            
            NAMESPACE=$(echo "$module_path" | cut -d'/' -f2)
            MODULE_NAME=$(echo "$module_path" | cut -d'/' -f4)
            
            echo "Processing: $NAMESPACE/$MODULE_NAME"
            
            LATEST_TAG=$(git tag -l "release/${NAMESPACE}/${MODULE_NAME}/v*" | sort -V | tail -1)
            README_PATH="$module_path/README.md"
            
            if [ -z "$LATEST_TAG" ]; then
              # No tag found, check if README has version references
              if [ -f "$README_PATH" ] && grep -q 'version\s*=\s*"' "$README_PATH"; then
                # Extract version from README
                README_VERSION=$(grep 'version\s*=\s*"' "$README_PATH" | head -1 | sed 's/.*version\s*=\s*"\([^"]*\)".*/\1/')
                echo "No git tag found, but README shows version: $README_VERSION"
                
                # Validate extracted version format
                if ! [[ "$README_VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
                  echo "❌ Invalid README version format: '$README_VERSION'. Expected X.Y.Z format."
                  echo "Starting from v1.0.0 instead"
                  CURRENT_VERSION="1.0.0"
                else
                  CURRENT_VERSION="$README_VERSION"
                  UNTAGGED_MODULES="$UNTAGGED_MODULES\n- $NAMESPACE/$MODULE_NAME (README: v$README_VERSION)"
                fi
              else
                echo "No existing tags or version references found for $NAMESPACE/$MODULE_NAME, starting from v1.0.0"
                CURRENT_VERSION="1.0.0"
              fi
            else
              CURRENT_VERSION=$(echo "$LATEST_TAG" | sed 's/.*\/v//')
              echo "Found git tag: $LATEST_TAG (v$CURRENT_VERSION)"
            fi
            
            echo "Current version: $CURRENT_VERSION"
            
            # Validate version format (semantic versioning: X.Y.Z)
            if ! [[ "$CURRENT_VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
              echo "❌ Invalid version format: '$CURRENT_VERSION'. Expected X.Y.Z format."
              exit 1
            fi
            
            IFS='.' read -r major minor patch <<< "$CURRENT_VERSION"
            
            # Validate that components are numeric
            if ! [[ "$major" =~ ^[0-9]+$ ]] || ! [[ "$minor" =~ ^[0-9]+$ ]] || ! [[ "$patch" =~ ^[0-9]+$ ]]; then
              echo "❌ Version components must be numeric: major='$major' minor='$minor' patch='$patch'"
              exit 1
            fi
            
            case "$BUMP_TYPE" in
              "patch")
                NEW_VERSION="$major.$minor.$((patch + 1))"
                ;;
              "minor")
                NEW_VERSION="$major.$((minor + 1)).0"
                ;;
              "major")
                NEW_VERSION="$((major + 1)).0.0"
                ;;
            esac
            
            echo "New version: $NEW_VERSION"
            
            if [ -f "$README_PATH" ]; then
              # Check if README contains version references for this specific module
              MODULE_SOURCE="registry.coder.com/${NAMESPACE}/${MODULE_NAME}/coder"
              if grep -q "source.*${MODULE_SOURCE}" "$README_PATH"; then
                echo "Updating version references for $NAMESPACE/$MODULE_NAME in $README_PATH"
                # Use awk to only update versions that follow the specific module source
                awk -v module_source="$MODULE_SOURCE" -v new_version="$NEW_VERSION" '
                /source.*=.*/ {
                  if ($0 ~ module_source) {
                    in_target_module = 1
                  } else {
                    in_target_module = 0
                  }
                }
                /version.*=.*"/ {
                  if (in_target_module) {
                    gsub(/version[[:space:]]*=[[:space:]]*"[^"]*"/, "version = \"" new_version "\"")
                    in_target_module = 0
                  }
                }
                { print }
                ' "$README_PATH" > "${README_PATH}.tmp" && mv "${README_PATH}.tmp" "$README_PATH"
                UPDATED_READMES="$UPDATED_READMES\n- $NAMESPACE/$MODULE_NAME"
              elif grep -q 'version\s*=\s*"' "$README_PATH"; then
                echo "⚠️  Found version references but no module source match for $NAMESPACE/$MODULE_NAME"
              fi
            fi
            
            BUMPED_MODULES="$BUMPED_MODULES\n- $NAMESPACE/$MODULE_NAME: v$CURRENT_VERSION → v$NEW_VERSION"
            
          done <<< "${{ steps.detect-modules.outputs.modules }}"
          
          echo "bumped_modules<<EOF" >> $GITHUB_OUTPUT
          echo -e "$BUMPED_MODULES" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT
          
          echo "updated_readmes<<EOF" >> $GITHUB_OUTPUT
          echo -e "$UPDATED_READMES" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT
          
          echo "untagged_modules<<EOF" >> $GITHUB_OUTPUT
          echo -e "$UNTAGGED_MODULES" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT
      - name: Commit changes
        run: |
          # Check if any README files were modified
          if git diff --quiet 'registry/*/modules/*/README.md'; then
            echo "No README changes to commit"
          else
            echo "Committing README changes..."
            git diff --name-only 'registry/*/modules/*/README.md'
            git add registry/*/modules/*/README.md
            git commit -m "chore: bump module versions (${{ steps.version-type.outputs.bump_type }})"
            git push
          fi
      - name: Comment on PR
        uses: actions/github-script@v7
        with:
          script: |
            const bumpedModules = `${{ steps.process-bumps.outputs.bumped_modules }}`;
            const updatedReadmes = `${{ steps.process-bumps.outputs.updated_readmes }}`;
            const untaggedModules = `${{ steps.process-bumps.outputs.untagged_modules }}`;
            const bumpType = `${{ steps.version-type.outputs.bump_type }}`;
            
            let comment = `## 🚀 Version Bump Summary\n\n`;
            comment += `**Bump Type:** \`${bumpType}\`\n\n`;
            comment += `**Modules Updated:**\n${bumpedModules}\n\n`;
            
            if (updatedReadmes.trim()) {
              comment += `**READMEs Updated:**\n${updatedReadmes}\n\n`;
            }
            
            if (untaggedModules.trim()) {
              comment += `⚠️ **Modules Without Git Tags:**\n${untaggedModules}\n\n`;
              comment += `> These modules were versioned based on README content. Consider creating proper release tags after merging.\n\n`;
            }
            
            comment += `> Versions have been automatically updated in module READMEs where applicable.`;
            
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: comment
            });