# Gitea Actions: Major Domo Database - Docker Build, Push, and Notify
#
# This workflow provides a complete CI/CD pipeline for the Major Domo Database API:
# - Validates semantic versioning on PRs
# - Builds Docker images on every push/PR
# - Pushes to Docker Hub on main branch merges
# - Sends Discord notifications on success/failure
#
# Created: 2026-02-04
# Adapted from: paper-dynasty-database template

name: Build Docker Image

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      # ==============================================
      # 1. CHECKOUT CODE
      # ==============================================
      - name: Checkout code
        uses: actions/checkout@v4

      # ==============================================
      # 2. SEMANTIC VERSION VALIDATION (PRs only)
      # ==============================================
      # Enforces proper semantic versioning:
      # - Blocks PRs that don't bump VERSION file
      # - Validates version changes follow semver rules
      # - Prevents skipping versions or going backwards
      #
      # Valid bumps:
      #   - Patch: 2.4.1 → 2.4.2 (bug fixes)
      #   - Minor: 2.4.1 → 2.5.0 (new features)
      #   - Major: 2.4.1 → 3.0.0 (breaking changes)
      #
      # Invalid bumps:
      #   - 2.4.1 → 2.6.0 (skipped minor version)
      #   - 2.4.1 → 2.3.0 (went backwards)
      #   - 2.4.1 → 2.5.1 (didn't reset patch)
      #
      - name: Check VERSION was bumped (semantic versioning)
        if: github.event_name == 'pull_request'
        run: |
          # Get VERSION from this PR branch
          PR_VERSION=$(cat VERSION 2>/dev/null || echo "0.0.0")

          # Get VERSION from main branch
          git fetch origin main:main
          MAIN_VERSION=$(git show main:VERSION 2>/dev/null || echo "0.0.0")

          echo "📋 Semantic Version Check"
          echo "Main branch version: $MAIN_VERSION"
          echo "PR branch version: $PR_VERSION"
          echo ""

          # Parse versions into components
          IFS='.' read -r MAIN_MAJOR MAIN_MINOR MAIN_PATCH <<< "$MAIN_VERSION"
          IFS='.' read -r PR_MAJOR PR_MINOR PR_PATCH <<< "$PR_VERSION"

          # Remove any non-numeric characters
          MAIN_MAJOR=${MAIN_MAJOR//[!0-9]/}
          MAIN_MINOR=${MAIN_MINOR//[!0-9]/}
          MAIN_PATCH=${MAIN_PATCH//[!0-9]/}
          PR_MAJOR=${PR_MAJOR//[!0-9]/}
          PR_MINOR=${PR_MINOR//[!0-9]/}
          PR_PATCH=${PR_PATCH//[!0-9]/}

          # Check if VERSION unchanged
          if [ "$PR_VERSION" = "$MAIN_VERSION" ]; then
            echo "❌ ERROR: VERSION file has not been updated!"
            echo ""
            echo "Please update the VERSION file in your PR."
            echo "Current version: $MAIN_VERSION"
            exit 1
          fi

          # Validate semantic version bump
          VALID=false
          BUMP_TYPE=""

          # Check for major version bump (X.0.0)
          if [ "$PR_MAJOR" -eq $((MAIN_MAJOR + 1)) ] && [ "$PR_MINOR" -eq 0 ] && [ "$PR_PATCH" -eq 0 ]; then
            VALID=true
            BUMP_TYPE="major"
          # Check for minor version bump (x.X.0)
          elif [ "$PR_MAJOR" -eq "$MAIN_MAJOR" ] && [ "$PR_MINOR" -eq $((MAIN_MINOR + 1)) ] && [ "$PR_PATCH" -eq 0 ]; then
            VALID=true
            BUMP_TYPE="minor"
          # Check for patch version bump (x.x.X)
          elif [ "$PR_MAJOR" -eq "$MAIN_MAJOR" ] && [ "$PR_MINOR" -eq "$MAIN_MINOR" ] && [ "$PR_PATCH" -eq $((MAIN_PATCH + 1)) ]; then
            VALID=true
            BUMP_TYPE="patch"
          fi

          if [ "$VALID" = true ]; then
            echo "✅ Valid $BUMP_TYPE version bump: $MAIN_VERSION → $PR_VERSION"
          else
            echo "❌ ERROR: Invalid semantic version change!"
            echo ""
            echo "Current version: $MAIN_VERSION"
            echo "PR version: $PR_VERSION"
            echo ""
            echo "Valid version bumps:"
            echo "  - Patch: $MAIN_MAJOR.$MAIN_MINOR.$((MAIN_PATCH + 1))"
            echo "  - Minor: $MAIN_MAJOR.$((MAIN_MINOR + 1)).0"
            echo "  - Major: $((MAIN_MAJOR + 1)).0.0"
            echo ""
            echo "Common issues:"
            echo "  ❌ Skipping versions (e.g., 2.5.0 → 2.7.0)"
            echo "  ❌ Going backwards (e.g., 2.5.0 → 2.4.0)"
            echo "  ❌ Not resetting lower components (e.g., 2.5.0 → 2.6.1)"
            exit 1
          fi

      # ==============================================
      # 3. DOCKER BUILDX SETUP
      # ==============================================
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      # ==============================================
      # 4. DOCKER HUB LOGIN (main branch only)
      # ==============================================
      # Requires secrets in Gitea:
      # - DOCKERHUB_USERNAME: Your Docker Hub username (manticorum67)
      # - DOCKERHUB_TOKEN: Docker Hub access token (not password!)
      #
      # To create token:
      # 1. Go to hub.docker.com
      # 2. Account Settings → Security → New Access Token
      # 3. Copy token to Gitea repo → Settings → Secrets → Actions
      #
      - name: Login to Docker Hub
        if: github.ref == 'refs/heads/main'
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      # ==============================================
      # 5. EXTRACT METADATA
      # ==============================================
      # Reads VERSION file and generates image tags:
      # - version: From VERSION file (e.g., "2.4.1")
      # - sha_short: First 7 chars of commit SHA
      # - version_sha: Combined version+commit (e.g., "v2.4.1-a1b2c3d")
      # - branch: Current branch name
      # - timestamp: ISO 8601 format for Discord
      #
      - name: Extract metadata
        id: meta
        run: |
          VERSION=$(cat VERSION 2>/dev/null || echo "0.0.0")
          SHA_SHORT=$(echo ${{ github.sha }} | cut -c1-7)
          echo "version=${VERSION}" >> $GITHUB_OUTPUT
          echo "sha_short=${SHA_SHORT}" >> $GITHUB_OUTPUT
          echo "version_sha=v${VERSION}-${SHA_SHORT}" >> $GITHUB_OUTPUT
          echo "branch=${{ github.ref_name }}" >> $GITHUB_OUTPUT
          echo "timestamp=$(date -u +'%Y-%m-%dT%H:%M:%SZ')" >> $GITHUB_OUTPUT

      # ==============================================
      # 6. BUILD AND PUSH DOCKER IMAGE
      # ==============================================
      # Creates 3 tags for each build:
      # - latest: Always points to newest build
      # - v{VERSION}: Semantic version from VERSION file
      # - v{VERSION}-{COMMIT}: Version + commit hash for traceability
      #
      # Example tags:
      # - manticorum67/major-domo-database:latest
      # - manticorum67/major-domo-database:v2.4.1
      # - manticorum67/major-domo-database:v2.4.1-a1b2c3d
      #
      # Push behavior:
      # - PRs: Build only (test), don't push
      # - Main: Build and push to Docker Hub
      #
      - name: Build Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: ${{ github.ref == 'refs/heads/main' }}
          tags: |
            manticorum67/major-domo-database:latest
            manticorum67/major-domo-database:v${{ steps.meta.outputs.version }}
            manticorum67/major-domo-database:${{ steps.meta.outputs.version_sha }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      # ==============================================
      # 7. BUILD SUMMARY
      # ==============================================
      # Creates a formatted summary visible in Actions UI
      # Shows: image tags, build details, push status
      #
      - name: Build Summary
        run: |
          echo "## 🐳 Docker Build Successful! ✅" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "**Image Tags:**" >> $GITHUB_STEP_SUMMARY
          echo "- \`manticorum67/major-domo-database:latest\`" >> $GITHUB_STEP_SUMMARY
          echo "- \`manticorum67/major-domo-database:v${{ steps.meta.outputs.version }}\`" >> $GITHUB_STEP_SUMMARY
          echo "- \`manticorum67/major-domo-database:${{ steps.meta.outputs.version_sha }}\`" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "**Build Details:**" >> $GITHUB_STEP_SUMMARY
          echo "- Branch: \`${{ steps.meta.outputs.branch }}\`" >> $GITHUB_STEP_SUMMARY
          echo "- Commit: \`${{ github.sha }}\`" >> $GITHUB_STEP_SUMMARY
          echo "- Timestamp: \`${{ steps.meta.outputs.timestamp }}\`" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          if [ "${{ github.ref }}" == "refs/heads/main" ]; then
            echo "🚀 **Pushed to Docker Hub!**" >> $GITHUB_STEP_SUMMARY
            echo "" >> $GITHUB_STEP_SUMMARY
            echo "Pull with: \`docker pull manticorum67/major-domo-database:latest\`" >> $GITHUB_STEP_SUMMARY
          else
            echo "_PR build - image not pushed to Docker Hub_" >> $GITHUB_STEP_SUMMARY
          fi

      # ==============================================
      # 8. DISCORD NOTIFICATION - SUCCESS
      # ==============================================
      # Sends green embed to Discord on successful builds
      #
      # Only fires on main branch pushes (not PRs)
      #
      # Setup:
      # 1. Create webhook in Discord channel:
      #    Right-click channel → Edit → Integrations → Webhooks → New
      # 2. Copy webhook URL
      # 3. Add as secret: DISCORD_WEBHOOK_URL in Gitea repo settings
      #
      - name: Discord Notification - Success
        if: success() && github.ref == 'refs/heads/main'
        run: |
          curl -H "Content-Type: application/json" \
            -d '{
              "embeds": [{
                "title": "✅ Major Domo Database Build Successful",
                "description": "Docker image built and pushed to Docker Hub!",
                "color": 3066993,
                "fields": [
                  {
                    "name": "Version",
                    "value": "`v${{ steps.meta.outputs.version }}`",
                    "inline": true
                  },
                  {
                    "name": "Image Tag",
                    "value": "`${{ steps.meta.outputs.version_sha }}`",
                    "inline": true
                  },
                  {
                    "name": "Branch",
                    "value": "`${{ steps.meta.outputs.branch }}`",
                    "inline": true
                  },
                  {
                    "name": "Commit",
                    "value": "`${{ steps.meta.outputs.sha_short }}`",
                    "inline": true
                  },
                  {
                    "name": "Author",
                    "value": "${{ github.actor }}",
                    "inline": true
                  },
                  {
                    "name": "Docker Hub",
                    "value": "[manticorum67/major-domo-database](https://hub.docker.com/r/manticorum67/major-domo-database)",
                    "inline": false
                  },
                  {
                    "name": "View Run",
                    "value": "[Click here](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})",
                    "inline": false
                  }
                ],
                "timestamp": "${{ steps.meta.outputs.timestamp }}"
              }]
            }' \
            ${{ secrets.DISCORD_WEBHOOK_URL }}

      # ==============================================
      # 9. DISCORD NOTIFICATION - FAILURE
      # ==============================================
      # Sends red embed to Discord on build failures
      #
      # Only fires on main branch pushes (not PRs)
      #
      - name: Discord Notification - Failure
        if: failure() && github.ref == 'refs/heads/main'
        run: |
          TIMESTAMP=$(date -u +%Y-%m-%dT%H:%M:%SZ)
          curl -H "Content-Type: application/json" \
            -d '{
              "embeds": [{
                "title": "❌ Major Domo Database Build Failed",
                "description": "Docker build encountered an error.",
                "color": 15158332,
                "fields": [
                  {
                    "name": "Branch",
                    "value": "`${{ github.ref_name }}`",
                    "inline": true
                  },
                  {
                    "name": "Commit",
                    "value": "`${{ github.sha }}`",
                    "inline": true
                  },
                  {
                    "name": "Author",
                    "value": "${{ github.actor }}",
                    "inline": true
                  },
                  {
                    "name": "View Logs",
                    "value": "[Click here](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})",
                    "inline": false
                  }
                ],
                "timestamp": "'"$TIMESTAMP"'"
              }]
            }' \
            ${{ secrets.DISCORD_WEBHOOK_URL }}

# ==============================================
# SETUP REQUIRED
# ==============================================
# Before this workflow will work:
#
# ✅ Add secrets to Gitea repo (Settings → Secrets → Actions):
#    - DOCKERHUB_USERNAME: manticorum67
#    - DOCKERHUB_TOKEN: Docker Hub access token
#    - DISCORD_WEBHOOK_URL: Discord webhook for build notifications
#
# ✅ Ensure VERSION file exists in repo root (currently: 2.4.1)
#
# ==============================================
# TROUBLESHOOTING
# ==============================================
# Common issues and solutions:
#
# 1. VERSION validation failing unexpectedly
#    - Ensure VERSION file contains only version number (no 'v' prefix)
#    - Verify version follows semver: MAJOR.MINOR.PATCH
#
# 2. Docker Hub push failing
#    - Verify DOCKERHUB_USERNAME and DOCKERHUB_TOKEN secrets are set
#    - Check Docker Hub token has push permissions
#
# 3. Discord notifications not appearing
#    - Test webhook URL manually with curl
#    - Check webhook still exists in Discord channel settings
#    - Look for HTTP error codes in Actions logs
#
# ==============================================