name: Commit Quality

on:
  pull_request:
    types: [opened, edited, synchronize, reopened]

permissions:
  contents: read
  pull-requests: write
  issues: write

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  PR_NUMBER: ${{ github.event.pull_request.number }}
  IS_FORK: ${{ github.event.pull_request.head.repo.full_name != github.repository }}

jobs:
  pr-title:
    name: PR Title
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          sparse-checkout: Tools/ci
          fetch-depth: 1

      - name: Check PR title
        id: check
        run: |
          python3 Tools/ci/check_pr_title.py "${{ github.event.pull_request.title }}" --markdown-file comment.md && rc=0 || rc=$?
          echo "exit_code=$rc" >> "$GITHUB_OUTPUT"

      - name: Post or clear comment
        if: env.IS_FORK == 'false'
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          if [ "${{ steps.check.outputs.exit_code }}" != "0" ]; then
            python3 Tools/ci/pr_comment.py --marker pr-title --pr "$PR_NUMBER" --result fail < comment.md
          else
            python3 Tools/ci/pr_comment.py --marker pr-title --pr "$PR_NUMBER" --result pass
          fi

      - name: Result
        if: steps.check.outputs.exit_code != '0'
        run: |
          echo "::error::PR title does not follow conventional commits format. See the PR comment for details."
          exit 1

  commit-messages:
    name: Commit Messages
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          sparse-checkout: Tools/ci
          fetch-depth: 1

      - name: Check commit messages
        id: check
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          gh api \
            "repos/${{ github.repository }}/pulls/${PR_NUMBER}/commits?per_page=100" \
            | python3 Tools/ci/check_commit_messages.py --markdown-file comment.md && rc=0 || rc=$?
          echo "exit_code=$rc" >> "$GITHUB_OUTPUT"
          # Check for warnings (non-empty markdown on exit 0)
          if [ "$rc" -eq 0 ] && [ -s comment.md ]; then
            echo "has_warnings=true" >> "$GITHUB_OUTPUT"
          else
            echo "has_warnings=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Post or clear comment
        if: env.IS_FORK == 'false'
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          if [ "${{ steps.check.outputs.exit_code }}" != "0" ]; then
            python3 Tools/ci/pr_comment.py --marker commit-msgs --pr "$PR_NUMBER" --result fail < comment.md
          elif [ "${{ steps.check.outputs.has_warnings }}" == "true" ]; then
            python3 Tools/ci/pr_comment.py --marker commit-msgs --pr "$PR_NUMBER" --result warn < comment.md
          else
            python3 Tools/ci/pr_comment.py --marker commit-msgs --pr "$PR_NUMBER" --result pass
          fi

      - name: Result
        if: steps.check.outputs.exit_code != '0'
        run: |
          echo "::error::Commit message errors found. See the PR comment for details."
          exit 1

  pr-body:
    name: PR Description
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        if: env.IS_FORK == 'false'
        uses: actions/checkout@v6
        with:
          sparse-checkout: Tools/ci
          fetch-depth: 1

      - name: Check PR body
        id: check
        env:
          PR_BODY: ${{ github.event.pull_request.body }}
        run: |
          message=""
          if [ -z "$PR_BODY" ]; then
            message="PR description is empty. Please add a summary of the changes."
            echo "::warning::PR description is empty."
          else
            cleaned=$(echo "$PR_BODY" | sed 's/<!--.*-->//g' | tr -d '[:space:]')
            if [ -z "$cleaned" ]; then
              message="PR description contains only template comments. Please fill in the details."
              echo "::warning::PR description contains only template comments."
            fi
          fi
          echo "message=$message" >> "$GITHUB_OUTPUT"

      - name: Post or clear comment
        if: env.IS_FORK == 'false'
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          if [ -n "${{ steps.check.outputs.message }}" ]; then
            printf '%s\n' \
              "## PR Description (advisory)" \
              "" \
              "This is **not blocking**, but your PR description appears to be empty or incomplete." \
              "" \
              "${{ steps.check.outputs.message }}" \
              "" \
              "A good PR description helps reviewers understand what changed and why." \
              "" \
              "---" \
              "*This comment will be automatically removed once the issue is resolved.*" \
            | python3 Tools/ci/pr_comment.py --marker pr-body --pr "$PR_NUMBER" --result warn
          else
            python3 Tools/ci/pr_comment.py --marker pr-body --pr "$PR_NUMBER" --result pass
          fi