name: Update MAKE-PRS-HERE

on:
  push:
    branches:
      - FrogPilot-Staging

env:
  SOURCE_BRANCH: FrogPilot-Staging
  TARGET_BRANCH: MAKE-PRS-HERE

jobs:
  update_branch:
    runs-on: ubuntu-latest
    steps:
      - name: Configure Git Identity
        run: |
          git config --global user.name "${{ github.actor }}"
          git config --global user.email "${{ github.actor }}@users.noreply.github.com"

      - name: Checkout ${{ env.SOURCE_BRANCH }}
        uses: actions/checkout@v3
        with:
          ref: "${{ env.SOURCE_BRANCH }}"
          fetch-depth: 0

      - name: Find "Compile FrogPilot" Commit in ${{ env.SOURCE_BRANCH }}
        id: find_parent
        run: |
          COMMIT=$(git rev-list HEAD -n 1 --grep="Compile FrogPilot")
          if [ -z "$COMMIT" ]; then
            echo "Commit with message 'Compile FrogPilot' not found." >&2
            exit 1
          fi

          PARENT=$(git rev-list --parents -n 1 "$COMMIT" | awk '{print $2}')
          if [ -z "$PARENT" ]; then
            echo "Parent commit not found." >&2
            exit 1
          fi

          echo "Compile commit: $COMMIT"
          echo "Parent commit: $PARENT"
          echo "parent_commit=$PARENT" >> "$GITHUB_OUTPUT"
          echo "compile_commit=$COMMIT" >> "$GITHUB_OUTPUT"

      - name: Checkout ${{ env.TARGET_BRANCH }}
        run: |
          git fetch origin "${{ env.TARGET_BRANCH }}"
          git checkout "${{ env.TARGET_BRANCH }}"

      - name: Clean ${{ env.TARGET_BRANCH }} and Apply Updates from ${{ env.SOURCE_BRANCH }}
        run: |
          git rm -r --ignore-unmatch .
          git clean -fdx

          PARENT_COMMIT="${{ steps.find_parent.outputs.parent_commit }}"
          git checkout "$PARENT_COMMIT" -- .

          COMPILE_COMMIT="${{ steps.find_parent.outputs.compile_commit }}"
          SOURCE_HEAD=$(git rev-parse "origin/${{ env.SOURCE_BRANCH }}")

          if [ "$COMPILE_COMMIT" != "$SOURCE_HEAD" ]; then
            echo "Applying changes from '${{ env.SOURCE_BRANCH }}' branch..."
            git cherry-pick --no-commit "${COMPILE_COMMIT}".."$SOURCE_HEAD"
          fi

          rm -f .github/update_date

          git add --all

      - name: Commit and Push to ${{ env.TARGET_BRANCH }}
        run: |
          TZ_VALUE="America/Phoenix"
          current_day=$(TZ="$TZ_VALUE" date +"%-d")
          month=$(TZ="$TZ_VALUE" date +"%B")
          year=$(TZ="$TZ_VALUE" date +"%Y")

          if [[ "$current_day" =~ ^1[123]$ ]]; then
            suffix="th"
          else
            case $(($current_day % 10)) in
              1) suffix="st" ;;
              2) suffix="nd" ;;
              3) suffix="rd" ;;
              *) suffix="th" ;;
            esac
          fi

          commit_message="${month} ${current_day}${suffix}, ${year} Update"
          echo "Commit message: $commit_message"

          if git log --oneline --format="%s" | grep -q "$commit_message"; then
            echo "Existing commit found with message: $commit_message"
            git commit --amend --no-edit
          else
            git commit -m "$commit_message"
          fi
          git push origin "${{ env.TARGET_BRANCH }}" --force