name: CD - Continuous Deployment

on:
  push:
    branches:
      - main
    tags:
      - 'v*.*.*'
  workflow_dispatch:
    inputs:
      deployment_target:
        description: 'Deployment target'
        required: true
        type: choice
        options:
          - all
          - docker
          - cloud
          - dashboard
          - release
        default: 'all'
      environment:
        description: 'Environment'
        required: true
        type: choice
        options:
          - production
          - staging
        default: 'production'

permissions:
  contents: write
  packages: write
  pages: write
  id-token: write

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  validate:
    name: Validate Repository
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Validate repository structure
        run: python3 scripts/ci_validate_repo.py

      - name: Validate shell scripts
        run: |
          bash -n scripts/package_mt5.sh
          bash -n scripts/deploy_mt5.sh 2>/dev/null || echo "deploy_mt5.sh not found, skipping"

  build-mt5-package:
    name: Build MT5 Package
    needs: validate
    runs-on: ubuntu-latest
    if: |
      github.event.inputs.deployment_target == 'all' || 
      github.event.inputs.deployment_target == 'release' || 
      startsWith(github.ref, 'refs/tags/v') ||
      github.event_name == 'push'
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Package MT5 files
        run: bash scripts/package_mt5.sh

      - name: Generate checksums
        run: |
          cd dist
          sha256sum Exness_MT5_MQL5.zip > Exness_MT5_MQL5.zip.sha256
          cat Exness_MT5_MQL5.zip.sha256

      - name: Upload package artifact
        uses: actions/upload-artifact@v4
        with:
          name: mt5-package
          path: |
            dist/Exness_MT5_MQL5.zip
            dist/Exness_MT5_MQL5.zip.sha256
          retention-days: 90

  build-docker-images:
    name: Build Docker Images
    needs: validate
    runs-on: ubuntu-latest
    if: |
      github.event.inputs.deployment_target == 'all' || 
      github.event.inputs.deployment_target == 'docker' || 
      github.event.inputs.deployment_target == 'cloud' ||
      startsWith(github.ref, 'refs/tags/v') ||
      github.event_name == 'push'
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

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

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=sha,prefix={{branch}}-
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          platforms: linux/amd64,linux/arm64

      - name: Image digest
        run: echo ${{ steps.meta.outputs.digest }}

  deploy-cloud:
    name: Deploy to Cloud Platforms
    needs: build-docker-images
    runs-on: ubuntu-latest
    if: |
      github.ref == 'refs/heads/main' && (
        github.event.inputs.deployment_target == 'all' || 
        github.event.inputs.deployment_target == 'cloud'
      )
    environment:
      name: ${{ github.event.inputs.environment || 'production' }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Validate cloud deployment configs
        run: |
          echo "Validating deployment configurations..."
          test -f Dockerfile && echo "✅ Dockerfile found"
          test -f docker-compose.yml && echo "✅ docker-compose.yml found"
          test -f render.yaml && echo "✅ render.yaml found"
          test -f railway.json && echo "✅ railway.json found"
          test -f fly.toml && echo "✅ fly.toml found"

      - name: Deploy to Fly.io
        if: env.FLY_API_TOKEN != ''
        run: |
          curl -L https://fly.io/install.sh | sh
          export FLYCTL_INSTALL="/home/runner/.fly"
          export PATH="$FLYCTL_INSTALL/bin:$PATH"
          flyctl deploy --remote-only || echo "Fly.io deployment skipped (not configured)"
        env:
          FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}

      - name: Notify Render deployment
        run: |
          echo "Render.com will auto-deploy from main branch via GitHub integration"
          echo "See render.yaml for configuration"

      - name: Notify Railway deployment
        run: |
          echo "Railway.app will auto-deploy from main branch via GitHub integration"
          echo "See railway.json for configuration"

  deploy-dashboard:
    name: Deploy Dashboard to GitHub Pages
    needs: validate
    runs-on: ubuntu-latest
    if: |
      github.ref == 'refs/heads/main' && (
        github.event.inputs.deployment_target == 'all' || 
        github.event.inputs.deployment_target == 'dashboard' ||
        github.event_name == 'push'
      )
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      
      - name: Setup Pages
        uses: actions/configure-pages@v4
      
      - name: Upload artifact
        uses: actions/upload-pages-artifact@v3
        with:
          path: './dashboard'
      
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v4

  create-release:
    name: Create GitHub Release
    needs: [validate, build-mt5-package, build-docker-images]
    runs-on: ubuntu-latest
    if: |
      startsWith(github.ref, 'refs/tags/v') || 
      github.event.inputs.deployment_target == 'release'
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Download MT5 package
        uses: actions/download-artifact@v4
        with:
          name: mt5-package
          path: ./dist

      - name: Extract version
        id: version
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            VERSION=$(cat VERSION)
            VERSION="v${VERSION}"
          else
            VERSION="${GITHUB_REF#refs/tags/}"
          fi
          echo "version=${VERSION}" >> $GITHUB_OUTPUT
          echo "Version: ${VERSION}"

      - name: Extract changelog
        id: changelog
        run: |
          VERSION="${{ steps.version.outputs.version }}"
          VERSION_NO_V="${VERSION#v}"
          
          if [ -f CHANGELOG.md ]; then
            awk "/## \[${VERSION_NO_V}\]/,/## \[/{if(/## \[${VERSION_NO_V}\]/)f=1;else if(/## \[/)exit;if(f)print}" CHANGELOG.md > release_notes.md
            
            if [ ! -s release_notes.md ]; then
              echo "Release ${VERSION}" > release_notes.md
              echo "" >> release_notes.md
              echo "See [CHANGELOG.md](CHANGELOG.md) for details." >> release_notes.md
            fi
          else
            echo "Release ${VERSION}" > release_notes.md
            echo "" >> release_notes.md
            echo "MQL5 SMC + Trend Breakout Trading System" >> release_notes.md
          fi

      - name: Create Release
        uses: softprops/action-gh-release@v1
        with:
          tag_name: ${{ steps.version.outputs.version }}
          name: Release ${{ steps.version.outputs.version }}
          body_path: release_notes.md
          draft: false
          prerelease: false
          files: |
            dist/Exness_MT5_MQL5.zip
            dist/Exness_MT5_MQL5.zip.sha256
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  deployment-summary:
    name: Deployment Summary
    needs: [validate, build-mt5-package, build-docker-images, deploy-cloud, deploy-dashboard, create-release]
    runs-on: ubuntu-latest
    if: always()
    steps:
      - name: Generate summary
        run: |
          echo "## 🚀 CD Pipeline Summary" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "**Trigger:** ${{ github.event_name }}" >> $GITHUB_STEP_SUMMARY
          echo "**Branch:** ${{ github.ref_name }}" >> $GITHUB_STEP_SUMMARY
          echo "**Commit:** ${{ github.sha }}" >> $GITHUB_STEP_SUMMARY
          echo "**Target:** ${{ github.event.inputs.deployment_target || 'auto' }}" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          
          echo "### Deployment Status" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "| Component | Status |" >> $GITHUB_STEP_SUMMARY
          echo "|-----------|--------|" >> $GITHUB_STEP_SUMMARY
          echo "| Validation | ${{ needs.validate.result }} |" >> $GITHUB_STEP_SUMMARY
          echo "| MT5 Package | ${{ needs.build-mt5-package.result }} |" >> $GITHUB_STEP_SUMMARY
          echo "| Docker Images | ${{ needs.build-docker-images.result }} |" >> $GITHUB_STEP_SUMMARY
          echo "| Cloud Deployment | ${{ needs.deploy-cloud.result }} |" >> $GITHUB_STEP_SUMMARY
          echo "| Dashboard | ${{ needs.deploy-dashboard.result }} |" >> $GITHUB_STEP_SUMMARY
          echo "| Release | ${{ needs.create-release.result }} |" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          
          echo "### Available Deployments" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "- 🐳 **Docker**: \`ghcr.io/${{ github.repository }}:latest\`" >> $GITHUB_STEP_SUMMARY
          echo "- ☁️ **Render**: Auto-deploys from main branch" >> $GITHUB_STEP_SUMMARY
          echo "- 🚂 **Railway**: Auto-deploys from main branch" >> $GITHUB_STEP_SUMMARY
          echo "- 🪰 **Fly.io**: Configured via fly.toml" >> $GITHUB_STEP_SUMMARY
          echo "- 📊 **Dashboard**: GitHub Pages" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          
          echo "### Documentation" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "- [Cloud Deployment Guide](docs/Cloud_Deployment_Guide.md)" >> $GITHUB_STEP_SUMMARY
          echo "- [CI/CD Setup](docs/GITHUB_CI_CD_SETUP.md)" >> $GITHUB_STEP_SUMMARY
          echo "- [Release Checklist](.github/RELEASE_CHECKLIST.md)" >> $GITHUB_STEP_SUMMARY