name: AutoMergeScan
on:
  schedule:
    - cron: '31 */2 * * *'
  workflow_dispatch:

jobs:
  automerge_scan:
    if: github.repository_owner == 'sonic-net'
    runs-on: ubuntu-latest
    steps:
    - name: Debug
      env:
        TOKEN: ${{ secrets.TOKEN }}
      run: |
        set -e

        echo ${TOKEN} | gh auth login --with-token
        gh pr list -R sonic-net/sonic-buildimage -A mssonicbld -L 100 -S "label:automerge" --json url,body,title,createdAt,labels,statusCheckRollup > prs.log
        cat prs.log | jq
    - name: Main
      run: |
        set -e

        # PR merge run per 2 hours
        # Other operation run per day.
        # Cherry pick PR:
        # more than 3 days, comment @author to check
        # more than 10 days, stop comment.
        # more than 28 days, comment @author PR will be closed
        # more than 30 days, close PR
        date_3d_ago=$(date --date "3 day ago" -u +"%FT%TZ")
        date_10d_ago=$(date --date "10 day ago" -u +"%FT%TZ")
        date_28d_ago=$(date --date "28 day ago" -u +"%FT%TZ")
        date_30d_ago=$(date --date "30 day ago" -u +"%FT%TZ")
        date_now=$(date -u +"%T")
        operate=false
        [[ "$date_now" < "02:00:00" ]] && operate=true

        count=$(cat prs.log | jq 'length')
        for ((i=0;i<$count;i++))
        do
          url=$(cat prs.log | jq -r ".[$i].url")
          body=$(cat prs.log | jq -r ".[$i].body")
          title=$(cat prs.log | jq -r ".[$i].title")
          origin_pr_id=$(echo $title | grep -Eo "\[action\] \[PR:[0-9]*\]" | grep -Eo [0-9]* || true)
          created_at=$(cat prs.log | jq -r ".[$i].createdAt")
          echo PR: $(($i+1))/$count, URL: $url, origin PR: $origin_pr_id, createdAt: $created_at, operate: $operate
          [[ "$url" == "" ]] && continue
          [[ $created_at > $(date --date "1 hour ago" -u +"%FT%TZ") ]] && continue

          checks=$(cat prs.log | jq ".[$i].statusCheckRollup")
          checks_count=$(echo $checks | jq 'length')
          pr_success=true
          for ((j=0;j<$checks_count;j++))
          do
            check=$(echo $checks | jq ".[$j]")
            status=$(echo $check | jq -r '.status')
            conclusion=$(echo $check | jq -r '.conclusion')
            name=$(echo $check | jq -r '.name')

            # EasyCLA success flag:  state=SUCCESS
            # Others success flag:   conclusion in SUCCESS,NEUTRAL
            # only check Azure.sonic-buildimage currently
            echo "$name" | grep -v "Azure.sonic-buildimage" > /dev/null && continue
            [[ "$status" != "COMPLETED" ]] && echo "$name: $status" && continue 2

            success=true
            ( [[ "$conclusion" == "FAILURE" ]] || [[ "$conclusion" == "CANCELLED" ]] ) && success=false && pr_success=false
            ! $success && echo "FAIL: $name"
          done

          # rerun Azure.sonic-buildimage per day
          ! $pr_success && $operate && gh pr comment $url --body "/azp run Azure.sonic-buildimage"

          # If auto cherry pick PRs failed, comment in original PR and close cherry pick PR
          if [ -n "$origin_pr_id" ] && [[ $created_at < $date_3d_ago ]] && ! $pr_success;then
            origin_pr_url=https://github.com/sonic-net/sonic-buildimage/pull/$origin_pr_id
            author=$(gh pr view $origin_pr_url --json author | jq .author.login -r)
            echo "Original author will check."
            $operate && [[ $created_at > $date_10d_ago ]] && gh pr comment $origin_pr_url --body "@$author cherry pick PR didn't pass PR checker. Please check!!!<br>$url"
            $operate && [[ $created_at < $date_28d_ago ]] && gh pr comment $origin_pr_url --body "@$author cherry pick PR didn't pass PR checker. Please check!!! Auto cherry pick PR will be closed in 2 days.<br>$url"
            $operate && [[ $created_at < $date_30d_ago ]] && echo "$url Closed" && gh pr close $url
          fi

          ! $pr_success && continue
          # merge the PR
          echo ========Merging  PR========
          if echo $title | grep "^\[submodule\]";then
            gh pr merge --squash --admin -R sonic-net/sonic-buildimage $url -b "$body" || true
          else
            gh pr merge --rebase --admin -R sonic-net/sonic-buildimage $url || true
          fi
          echo ========Finished PR========
        done