/**
 * @module computeStatistics
 * @description Summarizes the changes to files in the PR by platform.
 *
 * @param {Map} groupedFiles - map of platforms for containing info about the changes to files in that platform, from call to categorize
 * @param {[FileMetadata]} fileMetadatas - gitStream's list of metadata about file changes in the PR including path
 * @returns {[Object]} Returns list of computed summary statistic objects for each platform in the input groupedFiles

<!--- The issue this PR addresses -->
<!-- Fixes #? -->

### Context
<!--- Why do you believe many users will benefit from this change? -->
<!--- Link to relevant issues or forum discussions here -->

### Contributor Checklist
- [ ] [Review Contribution Guidelines](https://github.com/gradle/gradle/blob/master/CONTRIBUTING.md).

    let newRatio = totalAdditions / (totalAdditions + totalDeletions) * 100;

    let result = `:bar_chart: **Changes by ${title}: this PR is ${Math.round(newRatio, 2)}% new code**`;

    // Only title by Platform
    if (title === "Platform") {
        result += `
  <br>${platformsAffected(preppedStatistics)}`;
    }

    result += `
  <details>

# its own file.

on:
  - pr_created
  - commit

automations:

  summary_table:
    if:
      - {{ is.requested or not pr.author_is_org_member }}
      - {{ author.using_gitstream or not pr.author_is_org_member }}
    run:
      - action: add-comment@v1
        args:
          comment:
            <h3>Change Summary</h3>
            This PR is {{ changes.ratio | round(2) }}% new code.

# within the file.  We keep each automation (or very closely related group of automations) in
# its own file.

on:
  - pr_created
  - commit

automations:

  # Add the a:documentation label to docs-only changes
  docs_only:
    if:
      - {{ ('misc_labels' | isEnabledAutomation(pr)) }}
      - {{ is.docs }}
    run:
      - action: add-label@v1
        args:
          label: 'a:documentation'

# its own file.

on:
  - pr_created
  - commit
  - comment_added

automations:

  # Add a label that indicates how many minutes it will take to review the PR and categorizes it
  estimated_time_to_review:
    if:
      - {{ ('estimated_time_to_review' | isEnabledAutomation(pr)) }}
    run:
      - action: add-label@v1

# its own file.

on:
  - pr_created
  - commit
  - comment_added

automations:

  # Label changes by affected platforms (in blue)
  {% for platform in platforms %}
  platform_label_{{ platform.name }}:
    if:
      - {{ ('platform_labels' | isEnabledAutomation(pr)) }}

        run: sudo apt-get install groovy
      - name: List PR commits
        run: |
          git log --pretty=format:"%H" ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }} > pr_commits.txt
      - name: Check PR commits
        id: run_check
        run: |
          groovy .github/workflows/CheckBadMerge.groovy $(<pr_commits.txt) > output.txt 2>&1
      - name: Read output file

        else "<unknown>" // It's a source distribution, we don't know.
    }
}


// pre-test/master/queue/alice/feature -> master
// pre-test/release/current/bob/bugfix -> release
// gh-readonly-queue/master/pr-1234-5678abcdef -> master
fun toMergeQueueBaseBranch(actualBranch: String): String = when {
    actualBranch.startsWith("pre-test/") || actualBranch.startsWith("gh-readonly-queue/") -> actualBranch.substringAfter("/").substringBefore("/")

/**
 * @module byCodeowner
 * @description Groups the PR's files' by owner based on the CODEOWNERs file.
 * @param {string[]} files - the gitStream's files context variable
 * @param {Object} pr - the gitStream's pr context variable
 * @param {string} token - access token with repo:read scope, used to read the CODEOWNERS file
 * @param {string} pathToCodeOwners - path from repo root to CODEOWNERS file
 * @returns {Map} - Map from owner name to list of files they own