name: 'Verify Markdown Links'
description: 'Verify all links in markdown files using PowerShell and Markdig'
author: 'PowerShell Team'

inputs:
  timeout-sec:
    description: 'Timeout in seconds for HTTP requests'
    required: false
    default: '30'
  maximum-retry-count:
    description: 'Maximum number of retries for failed requests'
    required: false
    default: '2'

outputs:
  total-links:
    description: 'Total number of unique links checked'
    value: ${{ steps.verify.outputs.total }}
  passed-links:
    description: 'Number of links that passed verification'
    value: ${{ steps.verify.outputs.passed }}
  failed-links:
    description: 'Number of links that failed verification'
    value: ${{ steps.verify.outputs.failed }}
  skipped-links:
    description: 'Number of links that were skipped'
    value: ${{ steps.verify.outputs.skipped }}

runs:
  using: 'composite'
  steps:
    - name: Get changed markdown files
      id: changed-files
      uses: "./.github/actions/infrastructure/get-changed-files"
      with:
        filter: '*.md'
        event-types: 'pull_request,push'

    - name: Verify markdown links
      id: verify
      shell: pwsh
      env:
        CHANGED_FILES_JSON: ${{ steps.changed-files.outputs.files }}
      run: |
        Write-Host "Starting markdown link verification..." -ForegroundColor Cyan

        # Get changed markdown files from environment variable (secure against injection)
        $changedFilesJson = $env:CHANGED_FILES_JSON
        $changedFiles = $changedFilesJson | ConvertFrom-Json

        if ($changedFiles.Count -eq 0) {
          Write-Host "No markdown files changed, skipping verification" -ForegroundColor Yellow
          "total=0" >> $env:GITHUB_OUTPUT
          "passed=0" >> $env:GITHUB_OUTPUT
          "failed=0" >> $env:GITHUB_OUTPUT
          "skipped=0" >> $env:GITHUB_OUTPUT
          exit 0
        }

        Write-Host "Changed markdown files: $($changedFiles.Count)" -ForegroundColor Cyan
        $changedFiles | ForEach-Object { Write-Host "  - $_" -ForegroundColor Gray }

        # Build parameters for each file
        $params = @{
          File = $changedFiles
          TimeoutSec = [int]'${{ inputs.timeout-sec }}'
          MaximumRetryCount = [int]'${{ inputs.maximum-retry-count }}'
        }

        # Run the verification script
        $scriptPath = Join-Path '${{ github.action_path }}' 'Verify-MarkdownLinks.ps1'

        # Capture output and parse results
        $output = & $scriptPath @params 2>&1 | Tee-Object -Variable capturedOutput

        # Try to extract metrics from output
        $totalLinks = 0
        $passedLinks = 0
        $failedLinks = 0
        $skippedLinks = 0

        foreach ($line in $capturedOutput) {
          if ($line -match 'Total URLs checked: (\d+)') {
            $totalLinks = $Matches[1]
          }
          elseif ($line -match 'Passed: (\d+)') {
            $passedLinks = $Matches[1]
          }
          elseif ($line -match 'Failed: (\d+)') {
            $failedLinks = $Matches[1]
          }
          elseif ($line -match 'Skipped: (\d+)') {
            $skippedLinks = $Matches[1]
          }
        }

        # Set outputs
        "total=$totalLinks" >> $env:GITHUB_OUTPUT
        "passed=$passedLinks" >> $env:GITHUB_OUTPUT
        "failed=$failedLinks" >> $env:GITHUB_OUTPUT
        "skipped=$skippedLinks" >> $env:GITHUB_OUTPUT

        Write-Host "Action completed" -ForegroundColor Cyan

        # Exit with the same code as the verification script
        exit $LASTEXITCODE

branding:
  icon: 'link'
  color: 'blue'