name: Production Deploy

on:
  push:
    branches: [main]

jobs:
  build:
    runs-on: ubuntu-24.04

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup BEAM / Elixir
        uses: erlef/setup-beam@v1
        with:
          otp-version: 26
          elixir-version: 1.16.2

      - name: Cache dependencies
        uses: actions/cache@v4
        with:
          path: deps
          key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
          restore-keys: |
            ${{ runner.os }}-mix-

      - name: Install dependencies
        run: mix deps.get

      - name: Run tests
        env:
          PLANTID_DISCORD_BOT_TOKEN: ${{ secrets.PLANTID_DISCORD_BOT_TOKEN }}
        run: mix test

      - name: Clean build
        run: MIX_ENV=prod mix clean --deps

      - name: Build release
        env:
          PLANTNET_API_KEY: ${{ secrets.PLANTNET_API_KEY }}
          PLANTID_DISCORD_BOT_TOKEN: ${{ secrets.PLANTID_DISCORD_BOT_TOKEN }}
          PLANTID_LOGS_DISCORD_WEBHOOK_URL: ${{ secrets.PLANTID_LOGS_DISCORD_WEBHOOK_URL }}
        run: MIX_ENV=prod mix release

      - name: Compress build
        run: tar -czf release.tar.gz -C _build/prod/rel plantid_discord_bot

      - name: Upload release to server
        uses: appleboy/scp-action@v0.1.7
        with:
          host: ${{ secrets.HOST }}
          username: ${{ secrets.USERNAME }}
          key: ${{ secrets.SSH_KEY }}
          port: ${{ secrets.PORT }}
          source: release.tar.gz
          target: /home/${{ secrets.USERNAME }}/plantid_discord_bot/

      - name: Deploy release
        uses: appleboy/ssh-action@v1.2.0
        with:
          host: ${{ secrets.HOST }}
          username: ${{ secrets.USERNAME }}
          key: ${{ secrets.SSH_KEY }}
          port: ${{ secrets.PORT }}
          script: |
            # setup environment variables
            export PLANTID_LOGS_DISCORD_WEBHOOK_URL=${{ secrets.PLANTID_LOGS_DISCORD_WEBHOOK_URL }}
            export PLANTNET_API_KEY=${{ secrets.PLANTNET_API_KEY }}
            export PLANTID_DISCORD_BOT_TOKEN=${{ secrets.PLANTID_DISCORD_BOT_TOKEN }}
            export PLANTID_FILESERVER_URL=${{ secrets.PLANTID_FILESERVER_URL }}
            cd /home/${{ secrets.USERNAME }}/plantid_discord_bot

            # extract artifacts
            tar -xzf release.tar.gz

            # save metrics and stop the bot - bot runs as a service
            current_release/bin/plantid_discord_bot rpc "PlantidDiscordBot.Metrics.backup()"
            echo "${{ secrets.SUDO_PASSWORD }}" | sudo -S sudo systemctl stop plantid_discord_bot

            # switch releases
            rm -rf old_release
            mv current_release old_release || true
            mv plantid_discord_bot current_release

            # copy metrics from previous release to current release
            mkdir -p current_release/priv/metrics
            cp -r old_release/priv/metrics/* current_release/priv/metrics/ 2>/dev/null || true

            # start the bot
            echo "${{ secrets.SUDO_PASSWORD }}" | sudo -S sudo systemctl start plantid_discord_bot

            # cleanup
            rm -f release.tar.gz