name: Check for Submodule Changes
on: 
  schedule:
    - cron: "0 0,6,12,18 * * *"
  workflow_dispatch:

jobs:
  check:
    name: Check ${{ matrix.submodule.name }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        branches: [master]
        submodule:
          - name: ClientStructs
            path: lib/FFXIVClientStructs
            branch: main
            branch-prefix: csupdate
          - name: Excel Schema
            path: lib/Lumina.Excel
            branch: master
            branch-prefix: schemaupdate

    defaults: 
      run:
        shell: bash

    steps:
    - name: Checkout
      uses: actions/checkout@v3
      with:
        submodules: true
        ref: ${{ matrix.branches }}
        token: ${{ secrets.UPDATE_PAT }}
    - name: Create update branch
      run: git checkout -b ${{ matrix.submodule.branch-prefix }}/${{ matrix.branches }}
    - name: Initialize mandatory git config
      run: |
        git config --global user.name "github-actions[bot]"
        git config --global user.email noreply@github.com
        git config --global pull.rebase false
    - name: Update submodule
      id: update-submodule
      run: |
        git checkout -b ${{ matrix.submodule.branch-prefix }}-${{ matrix.branches }}
        git reset --hard origin/${{ matrix.branches }}
        cd ${{ matrix.submodule.path }}
        git fetch
        git reset --hard origin/${{ matrix.submodule.branch }}
        cd ../..
        git add ${{ matrix.submodule.path }}

        if [[ -z "$(git status --porcelain --untracked-files=no)" ]]; then   
          echo "No changes detected!"
          echo "SUBMIT_PR=false" >> "$GITHUB_OUTPUT"
          exit 0
        fi
        
        git commit --message "Update ${{ matrix.submodule.name }}"
        git push origin ${{ matrix.submodule.branch-prefix }}-${{ matrix.branches }} --force
        echo "SUBMIT_PR=true" >> "$GITHUB_OUTPUT"
        
    - name: Create PR
      if: ${{ steps.update-submodule.outputs.SUBMIT_PR == 'true' }}
      run: |
        echo ${{ secrets.UPDATE_PAT }} | gh auth login --with-token
        prNumber=$(gh pr list --base ${{ matrix.branches }} --head ${{ matrix.submodule.branch-prefix }}-${{ matrix.branches }} --state open --json number --template "{{range .}}{{.number}}{{end}}")
        if [ -z "$prNumber" ]; then
          echo "No PR found, creating one"
          gh pr create --head ${{ matrix.submodule.branch-prefix }}-${{ matrix.branches }} --title "[${{ matrix.branches }}] Update ${{ matrix.submodule.name }}" --body "" --base ${{ matrix.branches }}
        else
          echo "PR already exists, ignoring"
        fi