name: Weekly Update Est Time

on:
  schedule:
    - cron: '0 0 * * 1'  # Monday 00:00 UTC
  workflow_dispatch: {}

permissions:
  contents: write
  pull-requests: write

jobs:
  update-est-time:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.10'

      - name: Update est_time values
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          python scripts/ci/update_est_time.py \
            --summary-file /tmp/est_time_summary.md

      - name: Check for changes
        id: changes
        run: |
          if git diff --quiet; then
            echo "has_changes=false" >> "$GITHUB_OUTPUT"
            echo "No est_time changes detected"
          else
            echo "has_changes=true" >> "$GITHUB_OUTPUT"
            echo "Est_time changes detected:"
            git diff --stat
          fi

      - name: Create PR
        if: steps.changes.outputs.has_changes == 'true'
        env:
          GH_TOKEN: ${{ secrets.GH_PAT_FOR_PULL_REQUEST }}
        run: |
          git config user.name "sglang-bot"
          git config user.email "sglang-bot@users.noreply.github.com"

          BRANCH_NAME="bot/update-est-time-$(date +%Y%m%d)"
          git checkout -b "$BRANCH_NAME"

          git add -A
          git commit -m "chore: update CI test est_time from recent run data"

          git push origin "$BRANCH_NAME"

          {
            echo "## Summary"
            echo
            echo "Updates \`est_time\` values in CI test registration calls based on the 90th percentile of the last 15 successful executions from scheduled PR Test runs on main."
            echo
            echo "This keeps the LPT load-balancing algorithm accurate for partitioning tests across parallel CI jobs."
            echo
            if [ -f /tmp/est_time_summary.md ]; then
              cat /tmp/est_time_summary.md
              echo
            fi
            echo "🤖 Generated with GitHub Actions"
          } > /tmp/pr_body.md

          gh pr create \
            --title "chore: update CI test est_time values" \
            --body-file /tmp/pr_body.md \
            --base main \
            --head "$BRANCH_NAME"