# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
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# SPDX-License-Identifier: Apache-2.0

workflow:
  name: complex-pipeline

  groups:
  ##################################################
  # Group 1: Fetch data
  ##################################################
  - name: fetch
    tasks:
    - name: download
      lead: true
      image: ubuntu:24.04
      command: ["bash", "-c"]
      args:
      - |
        echo 'Downloading data...'
        mkdir -p {{output}}/data
        echo "apple" > {{output}}/data/fruits.txt
        echo "banana" >> {{output}}/data/fruits.txt
        echo "cherry" >> {{output}}/data/fruits.txt
        echo "Data downloaded!"

  ##################################################
  # Group 2: Process (depends on Group 1)
  ##################################################
  - name: process
    tasks:
    - name: transform-a
      lead: true
      image: ubuntu:24.04
      command: ["bash", "-c"]
      args:
      - |
        echo 'Transform A: Converting to uppercase...'
        mkdir -p {{output}}/transformed
        tr '[:lower:]' '[:upper:]' < {{input:0}}/data/fruits.txt > {{output}}/transformed/uppercase.txt

        sleep 120 # (1)
        echo "✓ Transform A complete!"
      inputs:
      - task: download

    - name: transform-b
      image: ubuntu:24.04
      command: ["bash", "-c"]
      args:
      - |
        echo 'Transform B: Adding line numbers...'
        mkdir -p {{output}}/transformed
        cat -n {{input:0}}/data/fruits.txt > {{output}}/transformed/numbered.txt
        echo "✓ Transform B complete!"
      inputs:
      - task: download

  ##################################################
  # Group 3: Aggregate (depends on Group 2)
  ##################################################
  - name: aggregate
    tasks:
    - name: combine
      lead: true
      image: ubuntu:24.04
      command: ["bash", "-c"]
      args:
      - |
        echo 'Combining results from both transforms...'
        mkdir -p {{output}}/final

        echo "=== UPPERCASE VERSION ===" > {{output}}/final/combined.txt
        cat {{input:0}}/transformed/uppercase.txt >> {{output}}/final/combined.txt

        echo "" >> {{output}}/final/combined.txt
        echo "=== NUMBERED VERSION ===" >> {{output}}/final/combined.txt
        cat {{input:1}}/transformed/numbered.txt >> {{output}}/final/combined.txt

        echo "✓ Results combined!"
        cat {{output}}/final/combined.txt
      inputs:  # (2)
      - task: transform-a
      - task: transform-b