name: Update FrogPilot Branch

on:
  schedule:
    - cron: "0 18 * * 6"

env:
  BRANCH_FROGPILOT: FrogPilot
  BRANCH_PREVIOUS: FrogPilot-Previous
  BRANCH_STAGING: FrogPilot-Staging
  GIT_EMAIL: "91348155+FrogAi@users.noreply.github.com"
  GIT_NAME: "James"
  GITHUB_TOKEN: ${{ secrets.PERSONAL_ACCESS_TOKEN }}
  TZ: America/Phoenix
  UPDATE_FILE: .github/update_date

jobs:
  check_update:
    runs-on: ubuntu-latest
    outputs:
      update_due: ${{ steps.check_update.outputs.update_due }}
      scheduled_date: ${{ steps.check_update.outputs.scheduled_date }}
    steps:
      - name: Check Update Status
        id: check_update
        env:
          REPO_NAME: ${{ github.repository }}
        run: |
          URL="https://raw.githubusercontent.com/$REPO_NAME/$BRANCH_STAGING/$UPDATE_FILE"
          STATUS=$(curl -o /dev/null -s -w "%{http_code}\n" "$URL")

          if [ "$STATUS" != "200" ]; then
            echo "update_due=false" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          SCHEDULED_DATE=$(curl -s "$URL")
          CURRENT_DATE=$(TZ="$TZ" date +%F)

          if [ "$SCHEDULED_DATE" == "$CURRENT_DATE" ]; then
            echo "update_due=true" >> "$GITHUB_OUTPUT"
            echo "scheduled_date=$SCHEDULED_DATE" >> "$GITHUB_OUTPUT"
          else
            echo "update_due=false" >> "$GITHUB_OUTPUT"
          fi

  update_branch:
    needs: check_update
    if: ${{ needs.check_update.outputs.update_due == 'true' }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Staging
        uses: actions/checkout@v4
        with:
          ref: ${{ env.BRANCH_STAGING }}
          fetch-depth: 0
          token: ${{ secrets.PERSONAL_ACCESS_TOKEN }}

      - name: Configure Git Identity
        run: |
          git config --global user.name "$GIT_NAME"
          git config --global user.email "$GIT_EMAIL"

      - name: Update README and Cleanup
        env:
          SCHEDULED_DATE: ${{ needs.check_update.outputs.scheduled_date }}
        run: |
          DAY=$(TZ="$TZ" date +'%d' | sed 's/^0//')
          case "$DAY" in
            1|21|31) SUFFIX="st" ;;
            2|22)    SUFFIX="nd" ;;
            3|23)    SUFFIX="rd" ;;
            *)       SUFFIX="th" ;;
          esac

          MONTH=$(TZ="$TZ" date +'%B')
          YEAR=$(TZ="$TZ" date +'%Y')
          DATE_FMT="${MONTH} ${DAY}${SUFFIX}, ${YEAR}"
          DATE_ESCAPED=$(printf '%s' "$DATE_FMT" | sed -E 's/ /%20/g; s/,/%2C/g')

          sed -i -E "s|(Last%20Updated-)[^-)]*|\1${DATE_ESCAPED}|g" README.md

          git rm -f "$UPDATE_FILE"
          git add README.md
          git commit -m "Updated README date to ${DATE_FMT}"

          git reset --soft HEAD~2
          ORIGINAL_MSG=$(git log -1 --pretty=%B HEAD)

          COMMIT_PHX=$(TZ="$TZ" date -d "$SCHEDULED_DATE 12:00" +"%Y-%m-%dT%H:%M:%S %z")
          GIT_COMMITTER_DATE="$COMMIT_PHX" GIT_AUTHOR_DATE="$COMMIT_PHX" git commit -m "$ORIGINAL_MSG"

      - name: Wait Until Noon ${{ env.TZ }}
        run: |
          NOW=$(TZ="$TZ" date +%s)
          TARGET=$(TZ="$TZ" date -d "12:00" +%s)

          if [ "$NOW" -lt "$TARGET" ]; then
            sleep $((TARGET - NOW))
          fi

      - name: Push and Sync Branches
        run: |
          git push origin "$BRANCH_STAGING" --force
          git fetch origin "$BRANCH_FROGPILOT:$BRANCH_FROGPILOT"
          git push origin "$BRANCH_FROGPILOT:$BRANCH_PREVIOUS" --force
          git push origin "$BRANCH_STAGING:$BRANCH_FROGPILOT" --force