name: Fetch GeoRelays Data

on:
  schedule:
    - cron: '0 6 * * 0'
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write

jobs:
  update-relay-data:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          fetch-depth: 0

      - name: Fetch GeoRelays
        run: |
          wget -q https://raw.githubusercontent.com/permissionlesstech/georelays/refs/heads/main/nostr_relays.csv
          mv nostr_relays.csv ./relays/online_relays_gps.csv

      - name: Configure git
        run: |
          git config user.email "action@github.com"
          git config user.name "GitHub Action"

      - name: Create update branch if changes
        id: create_branch
        run: |
          # exit early if no changes
          if git diff --quiet --relays/online_relays_gps.csv; then
            echo "changed=false" >> $GITHUB_OUTPUT
            exit 0
          fi

          # branch name with timestamp
          BRANCH="update-georelays-$(date -u +%Y%m%dT%H%M%SZ)"
          git checkout -b "$BRANCH"

          git add relays/online_relays_gps.csv
          git commit -m "Automated update of relay data - $(date -u --rfc-3339=seconds)"
          echo "changed=true" >> $GITHUB_OUTPUT
          echo "branch=$BRANCH" >> $GITHUB_OUTPUT

      - name: Push branch
        if: steps.create_branch.outputs.changed == 'true'
        run: |
          git push --set-upstream origin "${{ steps.create_branch.outputs.branch }}"

      - name: Create pull request
        if: steps.create_branch.outputs.changed == 'true'
        uses: peter-evans/create-pull-request@v5
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: Automated update of relay data
          branch: ${{ steps.create_branch.outputs.branch }}
          base: main
          title: Automated update of relay data
          body: |
            This PR was created automatically by the scheduled workflow. It updates relays/online_relays_gps.csv from the GeoRelays source.
          labels: automated, georelays

      - name: No changes
        if: steps.create_branch.outputs.changed != 'true'
        run: echo "No changes to relays/online_relays_gps.csv"