name: 'SSH Upload'
description: 'Upload files via SCP, automatically creating destination directories.'
author: 'MegaMiley Studio'

inputs:
  host:
    description: 'SSH Host IP or Domain'
    required: true
  port:
    description: 'SSH Port (default: 22)'
    required: false
    default: '22'
  username:
    description: 'SSH Username'
    required: true
  private_key:
    description: 'SSH Private Key'
    required: true
  transfers:
    description: 'List of transfers formatted as "source_file(s) | remote_destination". One per line.'
    required: true

runs:
  using: 'composite'
  steps:
    - name: Execute SSH/SCP Transfers
      shell: bash
      env:
        PRIVATE_KEY: ${{ inputs.private_key }}
        TRANSFERS: ${{ inputs.transfers }}
        HOST: ${{ inputs.host }}
        PORT: ${{ inputs.port }}
        USERNAME: ${{ inputs.username }}
      run: |
        # 1. Create a secure temporary file for the SSH key
        SSH_KEY_PATH=$(mktemp)
        printf '%s\n' "$PRIVATE_KEY" > "$SSH_KEY_PATH"
        chmod 600 "$SSH_KEY_PATH"

        # 2. Add Host to known_hosts to prevent verification prompts
        mkdir -p ~/.ssh
        ssh-keyscan -p "$PORT" -H "$HOST" >> ~/.ssh/known_hosts 2>/dev/null

        # 3. Securely write transfers input to a file for parsing
        printf '%s\n' "$TRANSFERS" > transfers.txt

        # 4. Loop through each line and execute commands
        while IFS= read -r line || [ -n "$line" ]; do
          # Skip empty lines
          [[ -z "$(echo "$line" | tr -d '[:space:]')" ]] && continue

          # Parse using the pipe | delimiter
          IFS='|' read -r src dest <<< "$line"

          # Trim leading and trailing whitespace
          src=$(echo "$src" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
          dest=$(echo "$dest" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')

          if [ -n "$src" ] && [ -n "$dest" ]; then
            echo "::group::Transfer to $dest"

            echo "Creating remote directory: $dest"
            ssh -i "$SSH_KEY_PATH" -p "$PORT" "$USERNAME@$HOST" "mkdir -p \"$dest\"" < /dev/null

            echo "Copying $src to $dest..."
            # Note: eval is used so wildcards or multiple space-separated files expand properly
            eval "scp -r -i \"$SSH_KEY_PATH\" -P $PORT $src \"$USERNAME@$HOST:$dest/\"" < /dev/null

            echo "::endgroup::"
          fi
        done < transfers.txt

        # 5. Cleanup
        rm -f "$SSH_KEY_PATH" transfers.txt