# Import Issue Workflow
# ---------------------
# This workflow imports a single issue from a source repository into this super-repo repository,
# as part of a migration. It preserves key metadata including title, body, labels, and comment
# history with timestamps and authorship.
#
# Trigger: Manually via `workflow_dispatch` with the following inputs:
#   - source_repo:   Full source repository name (e.g., "ROCm/rocBLAS")
#   - issue_number:  Issue number in the source repository to import
#
# Steps:
#   1. Validate that the caller has 'admin' or 'maintain' permission on the super-repo
#   2. Fetch the issue body, title, labels, and comments using the GitHub CLI (`gh api`)
#   3. Create a new issue in the target repo, preserving:
#      - Original title
#      - Original body
#      - All labels
#      - A reference link back to the source issue
#   4. Recreate each comment from the original issue with:
#      - Original comment body
#      - Original author and timestamp
#   5. Post a comment on the original issue linking to the new one
#
# Notes:
# - This workflow requires GitHub App credentials (APP_ID and APP_PRIVATE_KEY)
# - Only issue metadata is migrated; cross-linked issues, reactions, assignees, and milestones are not yet handled

name: Import Subrepo Issue

on:
  workflow_dispatch:
    inputs:
      source_repo:
        description: 'Full name of subrepo repo (e.g., ROCm/rocBLAS)'
        required: true
      issue_number:
        description: 'Issue number to import'
        required: true

jobs:
  import:
    runs-on: ubuntu-24.04
    permissions:
      issues: write
      contents: read
    steps:
      - name: Validate maintainer permissions
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "Actor is: ${{ github.actor }}"
          PERMISSION=$(gh api \
            repos/${{ github.repository }}/collaborators/${{ github.actor }}/permission \
            --jq .permission)
          if [[ "$PERMISSION" != "admin" && "$PERMISSION" != "maintain" ]]; then
            echo "❌ User ${{ github.actor }} is not authorized to run this workflow"
            exit 1
          fi

      - name: Generate a token
        id: generate-token
        uses: actions/create-github-app-token@df432ceedc7162793a195dd1713ff69aefc7379e # v2.0.6
        with:
          app-id: ${{ secrets.APP_ID }}
          private-key: ${{ secrets.APP_PRIVATE_KEY }}
          owner: ${{ github.repository_owner }}

      - name: Fetch issue and comments from source repo
        id: fetch
        env:
          GH_TOKEN: ${{ steps.generate-token.outputs.token }}
        run: |
          gh api "repos/${{ github.event.inputs.source_repo }}/issues/${{ github.event.inputs.issue_number }}" > issue.json
          gh api "repos/${{ github.event.inputs.source_repo }}/issues/${{ github.event.inputs.issue_number }}/comments" > comments.json

      - name: Create issue in target repo
        id: create
        env:
            GH_TOKEN: ${{ steps.generate-token.outputs.token }}
        run: |
          TITLE=$(jq -r .title issue.json)
          AUTHOR=$(jq -r .user.login issue.json)
          BODY=$(jq -r .body issue.json)

          LINK_TO_OLD="**[Migrated from original issue] ${{ github.event.inputs.source_repo }}#${{ github.event.inputs.issue_number }}**"
          AUTHOR_LINE="*Original issue author: @$AUTHOR*"
          FULL_BODY=$(printf "%b\n\n%b\n\n%s" "$LINK_TO_OLD" "$AUTHOR_LINE" "$BODY")

          # Read labels into array
          mapfile -t LABELS < <(jq -r '.labels[].name' issue.json)

          # Prepare gh api args for labels
          LABEL_ARGS=()
          for label in "${LABELS[@]}"; do
            LABEL_ARGS+=( -f "labels[]=$label" )
          done

          if [ ${#LABEL_ARGS[@]} -gt 0 ]; then
            NEW_ISSUE_JSON=$(gh api repos/${{ github.repository }}/issues \
              -f title="$TITLE" \
              -f body="$FULL_BODY" \
              "${LABEL_ARGS[@]}")
          else
            NEW_ISSUE_JSON=$(gh api repos/${{ github.repository }}/issues \
              -f title="$TITLE" \
              -f body="$FULL_BODY")
          fi

          echo "$NEW_ISSUE_JSON" > new_issue.json
          echo "new_issue_number=$(jq -r .number new_issue.json)" >> "$GITHUB_OUTPUT"

      - name: Recreate comments on new issue
        env:
            GH_TOKEN: ${{ steps.generate-token.outputs.token }}
        run: |
          jq -c '.[]' comments.json | while read -r comment; do
            AUTHOR=$(echo "$comment" | jq -r .user.login)
            CREATED_AT=$(echo "$comment" | jq -r .created_at)
            BODY=$(echo "$comment" | jq -r .body | sed 's/"/\\"/g')

            ORIG_AUTHOR="**Comment by @$AUTHOR on $CREATED_AT**"
            FORMATTED_BODY=$(printf "%b\n\n%s" "$ORIG_AUTHOR" "$BODY")

            gh api "repos/${{ github.repository }}/issues/${{ steps.create.outputs.new_issue_number }}/comments" \
              -f body="$FORMATTED_BODY"
          done

      - name: Optionally comment back on original issue
        env:
            GH_TOKEN: ${{ steps.generate-token.outputs.token }}
        run: |
          COMMENT="This issue has been migrated to: https://github.com/${{ github.repository }}/issues/${{ steps.create.outputs.new_issue_number }}"

          gh api "repos/${{ github.event.inputs.source_repo }}/issues/${{ github.event.inputs.issue_number }}/comments" \
            -f body="$COMMENT"