# Copyright 2025 The HuggingFace Inc. team. 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.

# This workflow automatically labels issues based on their content.
name: Issue Labeler
on:
  # Trigger on new issues and edits to existing issues
  issues:
    types: [opened, edited]

permissions:
  contents: read
  issues: write

jobs:
  label-issue:
    name: Auto Label Issue
    runs-on: ubuntu-latest
    if: github.repository == 'huggingface/lerobot'
    steps:
      - uses: actions/github-script@v8
        with:
          script: |
            // Setup Input Text (Unified Title + Body)
            const body = (context.payload.issue.body || '');
            const title = (context.payload.issue.title || '');

            // We keep a lowercased version for keyword matching
            const text = `${title}\n${body}`.toLowerCase();

            const labelsToAdd = new Set();

            // Helper: Simple regex test
            const matches = (re) => re.test(text);

            // Issue Type Detection (Dropdowns & Explicit Headers)
            if (text.includes('bug report') || /\bissue type:.*bug/.test(text)) {
              labelsToAdd.add('bug');
            }
            if (text.includes('feature request') || /\bissue type:.*feature/.test(text)) {
              labelsToAdd.add('enhancement');
            }
            if (text.includes('technical question') || /\bissue type:.*question/.test(text)) {
              labelsToAdd.add('question');
            }
            if (text.includes('maintenance') || /\bissue type:.*maintenance/.test(text)) {
              labelsToAdd.add('documentation');
            }

            // Keyword Heuristic

            // Domain Specific
            if (matches(/example(s)?\b|script(s)?\b|sample(s)?\b|demo(s)?\b|notebook(s)?\b/i)) labelsToAdd.add('examples');
            if (matches(/dataset(s)?\b|data loader|data augmentation|data preprocessing/i)) labelsToAdd.add('dataset');
            if (matches(/mujoco|isaac|\bsimulation\b|\bsim /i)) labelsToAdd.add('simulation');
            if (matches(/train|loss|optimizer|backward|gradient|wandb|sac\b/i)) labelsToAdd.add('training');
            if (matches(/rerun|plot|video|render|visualiz|gif/i)) labelsToAdd.add('visualization');
            if (matches(/camera|realsense|lidar|depth|sensor|imu|microphone|rgbd/i)) labelsToAdd.add('sensors');
            if (matches(/aloha|koch|so-100|so100|mobile|teleop|manipulator|robot(s)?\b/i)) labelsToAdd.add('robots');
            if (matches(/teleop|teleoperator|controller|leader|follower|joystick|gamepad/i)) labelsToAdd.add('teleoperators');
            if (matches(/policy|policies|p0licy/i)) labelsToAdd.add('policies');
            if (matches(/processor(s)?\b|implement.*processor|processor pipeline/i)) labelsToAdd.add('processor');
            if (matches(/eval|evaluate|evaluation|metric(s)?\b|score|benchmark/i)) labelsToAdd.add('evaluation');

            // Infrastructure & Code Quality
            if (matches(/test|pytest|unittest|failing test/i)) labelsToAdd.add('tests');
            if (matches(/ci|github actions|workflow|gha|action(s)?\b|pipeline/i)) {
              labelsToAdd.add('CI');
              labelsToAdd.add('github_actions');
            }
            if (matches(/perf|latency|benchmark|throughput|fps|speed|performance|benchmarking/i)) labelsToAdd.add('performance');
            if (matches(/dependency|requirements|pip|conda|install error|importerror|package not found/i)) labelsToAdd.add('dependencies');
            if (matches(/python\b|pyproject|requirements(\.txt)?|pip install|typing error/i)) labelsToAdd.add('python');

            // Documentation & Meta
            if (matches(/doc|documentation|docs|readme|typo|how to/i)) labelsToAdd.add('documentation');
            if (matches(/refactor|cleanup|restructure|rename|modernize code/i)) labelsToAdd.add('refactor');
            if (matches(/release|changelog|version bump|cut a release|tag v/i)) labelsToAdd.add('release');

            // Fixed: "BREAKING CHANGE" must be lowercase in regex because 'text' is lowercase
            if (matches(/breaking change|breaking:|major change/i)) labelsToAdd.add('breaking change');

            // Apply Labels
            const labels = Array.from(labelsToAdd).filter(Boolean);

            if (labels.length > 0) {
              console.log(`Adding labels: ${labels.join(', ')}`);
              await github.rest.issues.addLabels({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                labels,
              });
            }