name: Lint & Type Check

on:
  push:
    branches: [ 'main' ]
  pull_request:
    branches: [ '*' ]
  workflow_dispatch:


jobs:
  lint:
    name: Run Linters
    runs-on: ubuntu-latest
    
    permissions:
      pull-requests: write
      contents: read
    
    defaults:
      run:
        working-directory: backend
    
    steps:
    - name: Checkout code
      uses: actions/checkout@v4
    
    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: '3.12'
    
    - name: Cache pip dependencies
      uses: actions/cache@v4
      with:
        path: ~/.cache/pip
        key: ${{ runner.os }}-pip-${{ hashFiles('backend/pyproject.toml') }}
        restore-keys: |
          ${{ runner.os }}-pip-
    
    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -e ".[dev]"
    
    - name: Run pylint
      id: pylint
      run: |
        echo "Running pylint..."
        if pylint . > pylint-output.txt 2>&1; then
          echo "PYLINT_PASSED=true" >> $GITHUB_ENV
          echo "✅ No pylint errors found!"
        else
          echo "PYLINT_PASSED=false" >> $GITHUB_ENV
          echo "⚠️ Pylint found issues!"
        fi
        cat pylint-output.txt
      continue-on-error: true
    
    - name: Run ruff
      id: ruff
      run: |
        echo "Running ruff check..."
        if ruff check . > ruff-output.txt 2>&1; then
          echo "RUFF_PASSED=true" >> $GITHUB_ENV
          echo "✅ No ruff errors found!"
        else
          echo "RUFF_PASSED=false" >> $GITHUB_ENV
          echo "⚠️ Ruff found issues"
        fi
        cat ruff-output.txt
      continue-on-error: true
    
    - name: Run mypy
      id: mypy
      run: |
        echo "Running mypy..."
        if mypy . > mypy-output.txt 2>&1; then
          echo "MYPY_PASSED=true" >> $GITHUB_ENV
          echo "✅ No mypy errors found"
        else
          echo "MYPY_PASSED=false" >> $GITHUB_ENV
          echo "⚠️ Mypy found issues"
        fi
        cat mypy-output.txt
      continue-on-error: true
    
    - name: Create Lint Summary
      id: create_summary
      if: github.event_name == 'pull_request'
      run: |
        {
          echo '## 🔍 Lint & Type Check Results'
          echo ''
          
          # Pylint Status
          if [[ "${{ env.PYLINT_PASSED }}" == "true" ]]; then
            echo '### ✅ Pylint: **Passed**'
            echo 'No pylint issues found.'
          else
            echo '### ⚠️ Pylint: **Issues Found**'
            echo '<details><summary>View pylint output</summary>'
            echo ''
            echo '```'
            head -100 pylint-output.txt
            echo '```'
            echo '</details>'
          fi
          echo ''
          
          # Ruff Status
          if [[ "${{ env.RUFF_PASSED }}" == "true" ]]; then
            echo '### ✅ Ruff: **Passed**'
            echo 'No ruff issues found.'
          else
            echo '### ⚠️ Ruff: **Issues Found**'
            echo '<details><summary>View ruff output</summary>'
            echo ''
            echo '```'
            head -100 ruff-output.txt
            echo '```'
            echo '</details>'
          fi
          echo ''
          
          # Mypy Status
          if [[ "${{ env.MYPY_PASSED }}" == "true" ]]; then
            echo '### ✅ Mypy: **Passed**'
            echo 'No mypy issues found.'
          else
            echo '### ⚠️ Mypy: **Issues Found**'
            echo '<details><summary>View mypy output</summary>'
            echo ''
            echo '```'
            head -100 mypy-output.txt
            echo '```'
            echo '</details>'
          fi
          echo ''
          
          # Overall Summary
          if [[ "${{ env.PYLINT_PASSED }}" == "true" ]] && [[ "${{ env.RUFF_PASSED }}" == "true" ]] && [[ "${{ env.MYPY_PASSED }}" == "true" ]]; then
            echo '---'
            echo '### All checks passed!'
          else
            echo '---'
            echo '### Review the issues above and consider fixing them.'
          fi
          echo ''
          echo '<!-- lint-check-comment-marker -->'
        } > ../lint-report.md
        
    - name: Post PR Comment
      if: github.event_name == 'pull_request'
      uses: peter-evans/create-or-update-comment@v4
      with:
        issue-number: ${{ github.event.pull_request.number }}
        body-path: lint-report.md
        comment-marker: lint-check-comment-marker