name: Deploy to Production

on:
  push:
    branches: [ master ]
  workflow_dispatch:
    inputs:
      action:
        description: 'Action to perform'
        required: true
        type: choice
        options:
          - deploy
          - rollback
      rollback_commit:
        description: 'Commit hash to rollback to (optional, uses last successful if empty)'
        required: false
        type: string
      dry_run:
        description: 'Dry run (only for deploy — no SSH, only show planned steps)'
        required: true
        type: choice
        default: no
        options:
          - no
          - yes

jobs:
  deploy:
    runs-on: ubuntu-latest
    name: Deploy to Production
    if: |
      github.event_name == 'push' || 
      (github.event_name == 'workflow_dispatch' && github.event.inputs.action == 'deploy')
    env:
      DRY_RUN: ${{ github.event.inputs.dry_run == 'yes' }}
    concurrency:
      group: production-deploy-telegram-helper-bot
      cancel-in-progress: false
    environment:
      name: production
    
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          ref: master

      - name: Dry run (simulate deploy steps)
        if: github.event_name == 'workflow_dispatch' && github.event.inputs.dry_run == 'yes'
        run: |
          echo "🔍 DRY RUN — no SSH, no changes on server"
          echo "Would run on server:"
          echo "  1. cd /home/prod/bots/telegram-helper-bot"
          echo "  2. Backup DB → database/tg-bot-database_YYYYMMDD-HHMMSS.db (удаляется при успехе)"
          echo "  3. CURRENT_COMMIT + history; git fetch origin master && git reset --hard origin/master"
          echo "  4. apply_migrations.py (бэкап БД делается в шаге 1, при успехе удаляется в конце)"
          echo "  5. docker-compose -f /home/prod/docker-compose.yml config (validate)"
          echo "  6. docker-compose stop telegram-bot; build --pull telegram-bot; up -d telegram-bot"
          echo "  7. sleep 10; check container bots_telegram_bot"
          echo ""
          echo "Secrets/vars required: SERVER_HOST, SERVER_USER, SSH_PRIVATE_KEY, SSH_PORT, TELEGRAM_BOT_TOKEN, TELEGRAM_TEST_BOT_TOKEN"
          if [ -f docker-compose.yml ]; then
            echo "✅ docker-compose.yml present in repo (validation would run on server from /home/prod)"
          fi
      
      - name: Deploy to server
        if: github.event_name != 'workflow_dispatch' || github.event.inputs.dry_run != 'yes'
        uses: appleboy/ssh-action@v1.0.0
        with:
          host: ${{ vars.SERVER_HOST || secrets.SERVER_HOST }}
          username: ${{ vars.SERVER_USER || secrets.SERVER_USER }}
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          port: ${{ vars.SSH_PORT || secrets.SSH_PORT || 22 }}
          script: |
            set -e
            export TELEGRAM_BOT_TOKEN="${{ secrets.TELEGRAM_BOT_TOKEN }}"
            export TELEGRAM_TEST_BOT_TOKEN="${{ secrets.TELEGRAM_TEST_BOT_TOKEN }}"
            
            echo "🚀 Starting deployment to production..."
            
            DB_PATH="/home/prod/bots/telegram-helper-bot/database/tg-bot-database.db"
            DB_DIR="/home/prod/bots/telegram-helper-bot/database"
            BACKUP_FILE=""
            
            sudo chown -R deploy:deploy /home/prod/bots/telegram-helper-bot || true
            cd /home/prod/bots/telegram-helper-bot
            
            # Бэкап БД в самом начале; при успешном деплое удалим в конце
            if [ -f "$DB_PATH" ]; then
              echo "💾 Creating database backup (before any changes)..."
              BACKUP_NAME="tg-bot-database_$(date +%Y%m%d-%H%M%S).db"
              BACKUP_FILE="${DB_DIR}/${BACKUP_NAME}"
              cp "$DB_PATH" "$BACKUP_FILE" && echo "✅ Backup: $BACKUP_FILE" || { echo "❌ Backup failed!"; exit 1; }
            fi
            
            # Сохраняем информацию о коммите (до pull) — из репо telegram-helper-bot
            CURRENT_COMMIT=$(git rev-parse HEAD)
            COMMIT_MESSAGE=$(git log -1 --pretty=format:"%s" || echo "Unknown")
            COMMIT_AUTHOR=$(git log -1 --pretty=format:"%an" || echo "Unknown")
            TIMESTAMP=$(date +"%Y-%m-%d %H:%M:%S")
            
            echo "📝 Current commit: $CURRENT_COMMIT"
            echo "📝 Commit message: $COMMIT_MESSAGE"
            echo "📝 Author: $COMMIT_AUTHOR"
            
            # Записываем в историю деплоев
            HISTORY_FILE="/home/prod/.deploy_history_telegram_helper_bot.txt"
            HISTORY_SIZE="${DEPLOY_HISTORY_SIZE:-10}"
            echo "${TIMESTAMP}|${CURRENT_COMMIT}|${COMMIT_MESSAGE}|${COMMIT_AUTHOR}|deploying" >> "$HISTORY_FILE"
            tail -n "$HISTORY_SIZE" "$HISTORY_FILE" > "${HISTORY_FILE}.tmp" && mv "${HISTORY_FILE}.tmp" "$HISTORY_FILE"
            
            # Обновляем код
            echo "📥 Pulling latest changes from master..."
            git fetch origin master
            git reset --hard origin/master
            sudo chown -R deploy:deploy /home/prod/bots/telegram-helper-bot || true
            
            NEW_COMMIT=$(git rev-parse HEAD)
            echo "✅ Code updated: $CURRENT_COMMIT → $NEW_COMMIT"
            
            # Применяем миграции БД
            echo "🔄 Applying database migrations..."
            if [ -f "$DB_PATH" ]; then
              cd /home/prod/bots/telegram-helper-bot
              python3 scripts/apply_migrations.py --db "$DB_PATH" || {
                echo "❌ Ошибка при применении миграций!"
                exit 1
              }
              echo "✅ Миграции применены успешно"
            else
              echo "⚠️  База данных не найдена, пропускаем миграции (будет создана при первом запуске)"
            fi
            
            # Валидация docker-compose
            echo "🔍 Validating docker-compose configuration..."
            cd /home/prod
            docker-compose config > /dev/null || exit 1
            echo "✅ docker-compose.yml is valid"
            
            # Проверка дискового пространства
            MIN_FREE_GB=5
            AVAILABLE_SPACE=$(df -BG /home/prod 2>/dev/null | tail -1 | awk '{print $4}' | sed 's/G//' || echo "0")
            echo "💾 Available disk space: ${AVAILABLE_SPACE}GB"
            
            if [ "$AVAILABLE_SPACE" -lt "$MIN_FREE_GB" ]; then
              echo "⚠️  Insufficient disk space! Cleaning up Docker resources..."
              docker system prune -f --volumes || true
            fi
            
            # Пересобираем и перезапускаем контейнер бота
            echo "🔨 Rebuilding and restarting telegram-bot container..."
            cd /home/prod
            
            export TELEGRAM_BOT_TOKEN TELEGRAM_TEST_BOT_TOKEN
            docker-compose stop telegram-bot || true
            docker-compose build --pull telegram-bot
            docker-compose up -d telegram-bot
            
            echo "✅ Telegram bot container rebuilt and started"
            
            # Ждем немного и проверяем healthcheck
            echo "⏳ Waiting for container to start..."
            sleep 10
            
            if docker ps | grep -q bots_telegram_bot; then
              echo "✅ Container is running"
              # Успешный деплой — удаляем бэкап (при ошибке на любом шаге бэкап остаётся для rollback)
              if [ -n "${BACKUP_FILE:-}" ] && [ -f "$BACKUP_FILE" ]; then
                rm -f "$BACKUP_FILE" && echo "✅ Backup removed (deploy success)"
              fi
            else
              echo "❌ Container failed to start!"
              docker logs bots_telegram_bot --tail 50 || true
              exit 1
            fi
      
      - name: Update deploy history
        if: always() && env.DRY_RUN != 'true'
        uses: appleboy/ssh-action@v1.0.0
        with:
          host: ${{ vars.SERVER_HOST || secrets.SERVER_HOST }}
          username: ${{ vars.SERVER_USER || secrets.SERVER_USER }}
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          port: ${{ vars.SSH_PORT || secrets.SSH_PORT || 22 }}
          script: |
            HISTORY_FILE="/home/prod/.deploy_history_telegram_helper_bot.txt"
            
            if [ -f "$HISTORY_FILE" ]; then
              DEPLOY_STATUS="failed"
              if [ "${{ job.status }}" = "success" ]; then
                DEPLOY_STATUS="success"
              fi
              
              sed -i '$s/|deploying$/|'"$DEPLOY_STATUS"'/' "$HISTORY_FILE"
              echo "✅ Deploy history updated: $DEPLOY_STATUS"
            fi
      
      - name: Send deployment notification
        if: always() && env.DRY_RUN != 'true'
        uses: appleboy/telegram-action@v1.0.0
        with:
          to: ${{ secrets.TELEGRAM_CHAT_ID }}
          token: ${{ secrets.TELEGRAM_BOT_TOKEN }}
          message: |
            ${{ job.status == 'success' && '✅' || '❌' }} Deployment: ${{ job.status }}
            
            📦 Repository: telegram-helper-bot
            🌿 Branch: master
            📝 Commit: ${{ github.sha }}
            👤 Author: ${{ github.actor }}
            
            ${{ job.status == 'success' && '✅ Deployment successful! Container restarted with migrations applied.' || '❌ Deployment failed! Check logs for details.' }}
            
            🔗 View details: ${{ vars.GITEA_PUBLIC_URL || github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
        continue-on-error: true
      
      - name: Get PR body from merged PR
        if: job.status == 'success' && github.event_name == 'push' && env.DRY_RUN != 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "🔍 Searching for merged PR associated with commit ${{ github.sha }}..."
          
          # Находим последний мерженный PR для master по merge commit SHA
          COMMIT_SHA="${{ github.sha }}"
          PR_NUMBER=$(gh pr list --state merged --base master --limit 10 --json number,mergeCommit --jq ".[] | select(.mergeCommit.oid == \"$COMMIT_SHA\") | .number" | head -1)
          
          # Если не нашли по merge commit, ищем последний мерженный PR
          if [ -z "$PR_NUMBER" ]; then
            echo "⚠️  PR not found by merge commit, trying to get latest merged PR..."
            PR_NUMBER=$(gh pr list --state merged --base master --limit 1 --json number --jq '.[0].number')
          fi
          
          if [ -n "$PR_NUMBER" ] && [ "$PR_NUMBER" != "null" ]; then
            echo "✅ Found PR #$PR_NUMBER"
            PR_BODY=$(gh pr view $PR_NUMBER --json body --jq '.body // ""')
            
            if [ -n "$PR_BODY" ] && [ "$PR_BODY" != "null" ]; then
              echo "PR_BODY<<EOF" >> $GITHUB_ENV
              echo "$PR_BODY" >> $GITHUB_ENV
              echo "EOF" >> $GITHUB_ENV
              echo "PR_NUMBER=$PR_NUMBER" >> $GITHUB_ENV
              echo "✅ PR body extracted successfully"
            else
              echo "⚠️  PR body is empty"
            fi
          else
            echo "⚠️  No merged PR found for this commit"
          fi
        continue-on-error: true
      
      - name: Send PR body to important logs
        if: job.status == 'success' && github.event_name == 'push' && env.DRY_RUN != 'true' && env.PR_BODY != ''
        uses: appleboy/telegram-action@v1.0.0
        with:
          to: ${{ secrets.IMPORTANT_LOGS_CHAT }}
          token: ${{ secrets.TELEGRAM_BOT_TOKEN }}
          message: |
            📋 Pull Request Description (PR #${{ env.PR_NUMBER }}):
            
            ${{ env.PR_BODY }}
            
            🔗 PR: ${{ vars.GITEA_PUBLIC_URL || github.server_url }}/${{ github.repository }}/pull/${{ env.PR_NUMBER }}
            📝 Commit: ${{ github.sha }}
        continue-on-error: true

  rollback:
    runs-on: ubuntu-latest
    name: Rollback to Previous Version
    if: |
      github.event_name == 'workflow_dispatch' && 
      github.event.inputs.action == 'rollback'
    environment:
      name: production

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          ref: master
      
      - name: Rollback on server
        uses: appleboy/ssh-action@v1.0.0
        with:
          host: ${{ vars.SERVER_HOST || secrets.SERVER_HOST }}
          username: ${{ vars.SERVER_USER || secrets.SERVER_USER }}
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          port: ${{ vars.SSH_PORT || secrets.SSH_PORT || 22 }}
          script: |
            set -e
            export TELEGRAM_BOT_TOKEN="${{ secrets.TELEGRAM_BOT_TOKEN }}"
            export TELEGRAM_TEST_BOT_TOKEN="${{ secrets.TELEGRAM_TEST_BOT_TOKEN }}"
            
            echo "🔄 Starting rollback..."
            
            cd /home/prod
            
            # Определяем коммит для отката
            ROLLBACK_COMMIT="${{ github.event.inputs.rollback_commit }}"
            HISTORY_FILE="/home/prod/.deploy_history_telegram_helper_bot.txt"
            
            if [ -z "$ROLLBACK_COMMIT" ]; then
              echo "📝 No commit specified, finding last successful deploy..."
              if [ -f "$HISTORY_FILE" ]; then
                ROLLBACK_COMMIT=$(grep "|success$" "$HISTORY_FILE" | tail -1 | cut -d'|' -f2 || echo "")
              fi
              
              if [ -z "$ROLLBACK_COMMIT" ]; then
                echo "❌ No successful deploy found in history!"
                echo "💡 Please specify commit hash manually or check deploy history"
                exit 1
              fi
            fi
            
            echo "📝 Rolling back to commit: $ROLLBACK_COMMIT"
            
            # Проверяем, что коммит существует
            cd /home/prod/bots/telegram-helper-bot
            if ! git cat-file -e "$ROLLBACK_COMMIT" 2>/dev/null; then
              echo "❌ Commit $ROLLBACK_COMMIT not found!"
              exit 1
            fi
            
            # Сохраняем текущий коммит
            CURRENT_COMMIT=$(git rev-parse HEAD)
            COMMIT_MESSAGE=$(git log -1 --pretty=format:"%s" "$ROLLBACK_COMMIT" || echo "Rollback")
            TIMESTAMP=$(date +"%Y-%m-%d %H:%M:%S")
            
            echo "📝 Current commit: $CURRENT_COMMIT"
            echo "📝 Target commit: $ROLLBACK_COMMIT"
            echo "📝 Commit message: $COMMIT_MESSAGE"
            
            # Исправляем права перед откатом
            sudo chown -R deploy:deploy /home/prod/bots/telegram-helper-bot || true
            
            # Откатываем код
            echo "🔄 Rolling back code..."
            git fetch origin master
            git reset --hard "$ROLLBACK_COMMIT"
            
            # Исправляем права после отката
            sudo chown -R deploy:deploy /home/prod/bots/telegram-helper-bot || true
            
            echo "✅ Code rolled back: $CURRENT_COMMIT → $ROLLBACK_COMMIT"
            
            # Валидация docker-compose
            echo "🔍 Validating docker-compose configuration..."
            cd /home/prod
            docker-compose config > /dev/null || exit 1
            echo "✅ docker-compose.yml is valid"
            
            # Проверка дискового пространства
            MIN_FREE_GB=5
            AVAILABLE_SPACE=$(df -BG /home/prod 2>/dev/null | tail -1 | awk '{print $4}' | sed 's/G//' || echo "0")
            echo "💾 Available disk space: ${AVAILABLE_SPACE}GB"
            
            if [ "$AVAILABLE_SPACE" -lt "$MIN_FREE_GB" ]; then
              echo "⚠️  Insufficient disk space! Cleaning up Docker resources..."
              docker system prune -f --volumes || true
            fi
            
            # Пересобираем и перезапускаем контейнер
            echo "🔨 Rebuilding and restarting telegram-bot container..."
            cd /home/prod
            
            export TELEGRAM_BOT_TOKEN TELEGRAM_TEST_BOT_TOKEN
            docker-compose stop telegram-bot || true
            docker-compose build --pull telegram-bot
            docker-compose up -d telegram-bot
            
            echo "✅ Telegram bot container rebuilt and started"
            
            # Записываем в историю
            echo "${TIMESTAMP}|${ROLLBACK_COMMIT}|Rollback to: ${COMMIT_MESSAGE}|github-actions|rolled_back" >> "$HISTORY_FILE"
            HISTORY_SIZE="${DEPLOY_HISTORY_SIZE:-10}"
            tail -n "$HISTORY_SIZE" "$HISTORY_FILE" > "${HISTORY_FILE}.tmp" && mv "${HISTORY_FILE}.tmp" "$HISTORY_FILE"
            
            echo "✅ Rollback completed successfully"
      
      - name: Send rollback notification
        if: always()
        uses: appleboy/telegram-action@v1.0.0
        with:
          to: ${{ secrets.TELEGRAM_CHAT_ID }}
          token: ${{ secrets.TELEGRAM_BOT_TOKEN }}
          message: |
            ${{ job.status == 'success' && '🔄' || '❌' }} Rollback: ${{ job.status }}
            
            📦 Repository: telegram-helper-bot
            🌿 Branch: master
            📝 Rolled back to: ${{ github.event.inputs.rollback_commit || 'Last successful commit' }}
            👤 Triggered by: ${{ github.actor }}
            
            ${{ job.status == 'success' && '✅ Rollback completed successfully! Services restored to previous version.' || '❌ Rollback failed! Check logs for details.' }}
            
            🔗 View details: ${{ vars.GITEA_PUBLIC_URL || github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
        continue-on-error: true