name: PR Trigger Reality Sync

on:
  issue_comment:
    types: [created]
  pull_request_target:
    types: [synchronize]

jobs:
  # Post a helpful message when unauthorized users try to trigger sync
  unauthorized-message:
    if: |
      github.event_name == 'issue_comment' &&
      github.event.issue.pull_request &&
      (
        contains(github.event.comment.body, '@rerun-bot reality-sync') ||
        contains(github.event.comment.body, '@rerun-bot sync-reality')
      ) &&
      github.event.comment.user.type != 'Bot' &&
      github.event.comment.author_association != 'OWNER' &&
      github.event.comment.author_association != 'MEMBER'
    runs-on: ubuntu-latest
    steps:
      - name: Create GitHub App token
        id: app-token
        uses: actions/create-github-app-token@v2
        with:
          app-id: ${{ vars.SYNC_APP_ID }}
          private-key: ${{ secrets.SYNC_APP_PRIVATE_KEY }}
          owner: rerun-io
          repositories: rerun

      - name: Post unauthorized message
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
        run: |
          gh pr comment ${{ github.event.issue.number }} \
            --repo ${{ github.repository }} \
            --body "Sorry, only organization members can trigger reality-sync."

  trigger-import:
    # For issue_comment: org members (OWNER/MEMBER) can trigger with '@rerun-bot reality-sync' or '@rerun-bot sync-reality'
    # For pull_request_target: only auto-sync non-fork PRs (fork PRs require explicit comment trigger)
    if: |
      (
        github.event_name == 'issue_comment' &&
        github.event.issue.pull_request &&
        (
          contains(github.event.comment.body, '@rerun-bot reality-sync') ||
          contains(github.event.comment.body, '@rerun-bot sync-reality')
        ) &&
        github.event.comment.user.type != 'Bot' &&
        (
          github.event.comment.author_association == 'OWNER' ||
          github.event.comment.author_association == 'MEMBER'
        )
      ) || (
        github.event_name == 'pull_request_target' &&
        github.event.pull_request.head.repo.full_name == github.repository
      )
    runs-on: ubuntu-latest
    defaults:
      run:
        shell: bash --noprofile --norc -euo pipefail {0}
    steps:
      - name: Create GitHub App token
        id: app-token
        uses: actions/create-github-app-token@v2
        with:
          app-id: ${{ vars.SYNC_APP_ID }}
          private-key: ${{ secrets.SYNC_APP_PRIVATE_KEY }}
          owner: rerun-io
          repositories: |
            reality
            rerun

      - name: Acknowledge command (eyes reaction)
        if: github.event_name == 'issue_comment'
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
        run: |
          gh api -X POST \
            /repos/${{ github.repository }}/issues/comments/${{ github.event.comment.id }}/reactions \
            -f content=eyes

      - name: Determine PR number
        id: pr-info
        run: |
          if [ "${{ github.event_name }}" = "issue_comment" ]; then
            echo "pr_number=${{ github.event.issue.number }}" >> $GITHUB_OUTPUT
            echo "triggered_by=${{ github.event.comment.user.login }}" >> $GITHUB_OUTPUT
            echo "trigger_type=comment" >> $GITHUB_OUTPUT
          else
            echo "pr_number=${{ github.event.pull_request.number }}" >> $GITHUB_OUTPUT
            echo "triggered_by=${{ github.event.sender.login }}" >> $GITHUB_OUTPUT
            echo "trigger_type=push" >> $GITHUB_OUTPUT
          fi

      - name: Check for existing sync comment (push events only)
        if: github.event_name == 'pull_request_target'
        id: check-sync-comment
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
        run: |
          PR_NUMBER="${{ steps.pr-info.outputs.pr_number }}"
          echo "Checking PR #${PR_NUMBER} for existing sync comment…"

          # Look for "Sync complete" comment from the sync bot (GitHub App)
          # Check performed_via_github_app.id matches our app to prevent spoofing
          SYNC_APP_ID="${{ vars.SYNC_APP_ID }}"
          SYNC_COMMENT=$(gh api "repos/${{ github.repository }}/issues/${PR_NUMBER}/comments" \
            | jq -r --arg app_id "$SYNC_APP_ID" '.[] | select((.performed_via_github_app.id | tostring == $app_id) and (.body | contains("Sync complete. Mirror PR in reality:"))) | .id' \
            | head -1)

          if [ -n "$SYNC_COMMENT" ]; then
            echo "has_sync=true" >> $GITHUB_OUTPUT
            echo "✓ Found existing sync comment, will re-sync on push"
          else
            echo "has_sync=false" >> $GITHUB_OUTPUT
            echo "No existing sync comment found, skipping auto-sync"
          fi

      - name: Get PR details
        if: |
          github.event_name == 'issue_comment' ||
          steps.check-sync-comment.outputs.has_sync == 'true'
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
        run: |
          PR_NUMBER="${{ steps.pr-info.outputs.pr_number }}"
          echo "Fetching PR details for PR #${PR_NUMBER}…"
          gh pr view "$PR_NUMBER" \
            --repo ${{ github.repository }} \
            --json headRefName,headRepositoryOwner,headRepository,number,title,body,labels \
            > /tmp/pr_data.json

          echo "PR data:"
          jq '.' /tmp/pr_data.json

      - name: Trigger reality sync workflow
        if: |
          github.event_name == 'issue_comment' ||
          steps.check-sync-comment.outputs.has_sync == 'true'
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
        run: |
          echo "================================================"
          echo "Triggering repository_dispatch to reality repo"
          echo "Trigger type: ${{ steps.pr-info.outputs.trigger_type }}"
          echo "================================================"

          # Construct the entire payload using jq to avoid shell substitution
          # This ensures backticks and other special characters in title/body are handled safely
          jq -n \
            --arg repo "${{ github.event.repository.name }}" \
            --arg current_repo "${{ github.repository }}" \
            --arg triggered_by "${{ steps.pr-info.outputs.triggered_by }}" \
            --slurpfile pr_data /tmp/pr_data.json \
            '{
              event_type: "sync-import-pr",
              client_payload: {
                repo: $repo,
                pr_number: $pr_data[0].number,
                head_ref: $pr_data[0].headRefName,
                head_owner: $pr_data[0].headRepositoryOwner.login,
                head_repo: $pr_data[0].headRepository.name,
                title: $pr_data[0].title,
                body: ($pr_data[0].body // ""),
                labels: $pr_data[0].labels,
                is_fork: (("\($pr_data[0].headRepositoryOwner.login)/\($pr_data[0].headRepository.name)") != $current_repo),
                triggered_by: $triggered_by
              }
            }' > /tmp/dispatch_payload.json

          echo "Dispatch payload:"
          jq '.' /tmp/dispatch_payload.json

          # Make the API call with the JSON payload
          if gh api repos/rerun-io/reality/dispatches --input /tmp/dispatch_payload.json 2>&1; then
            echo "✓ Successfully dispatched sync-import-pr event to reality repo"
            echo "Note: repository_dispatch returns 204 No Content on success"
            echo "The reality repo should now be processing the import workflow"
          else
            echo "::error::Failed to dispatch repository_dispatch event to reality repo"
            echo "::error::This could be due to:"
            echo "::error::  1. Insufficient permissions on the GitHub App token"
            echo "::error::  2. Reality repo not found or not accessible"
            echo "::error::  3. Network issues"
            exit 1
          fi