#/
# @license Apache-2.0
#
# Copyright (c) 2024 The Stdlib Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#/

# Workflow name:
name: pr_merge_develop

# Workflow triggers:
on:
  # Allow the workflow to be triggered by other workflows
  workflow_call:
    # Define the input parameters for the workflow:
    inputs:
      pull_request_number:
        description: 'PR number'
        required: true
        type: number

    # Define the secrets accessible by the workflow:
    secrets:
      STDLIB_BOT_GITHUB_TOKEN:
        description: 'GitHub token for stdlib-bot'
        required: true
      STDLIB_BOT_GPG_PRIVATE_KEY:
        description: 'GPG private key for stdlib-bot'
        required: true
      STDLIB_BOT_GPG_PASSPHRASE:
        description: 'GPG passphrase for stdlib-bot'
        required: true

# Workflow jobs:
jobs:
  merge:
    # Define a display name:
    name: 'Merge Develop into PR Branch'

    # Define the type of virtual host machine:
    runs-on: ubuntu-latest

    # Define the job's steps:
    steps:
      # Get PR details:
      - name: 'Get PR details'
        id: pr-details
        run: |
          pr_response=$(curl -s \
            -H "Accept: application/vnd.github.v3+json" \
            -H "Authorization: Bearer ${{ secrets.STDLIB_BOT_GITHUB_TOKEN }}" \
            "https://api.github.com/repos/stdlib-js/stdlib/pulls/${{ inputs.pull_request_number }}")

          # Escape control characters:
          pr_response=$(echo "$pr_response" | tr -d '\000-\031')

          # Extract the needed details:
          pr_branch=$(echo "$pr_response" | jq -r '.head.ref')
          pr_repo_full_name=$(echo "$pr_response" | jq -r '.head.repo.full_name')

          echo "branch=$pr_branch" >> $GITHUB_OUTPUT
          echo "repository=$pr_repo_full_name" >> $GITHUB_OUTPUT

      # Checkout the repository:
      - name: 'Checkout repository'
        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          ref: ${{ steps.pr-details.outputs.branch }}
          repository: ${{ steps.pr-details.outputs.repository }}
          token: ${{ secrets.STDLIB_BOT_GITHUB_TOKEN }}
          fetch-depth: 0

      # Disable Git hooks:
      - name: 'Disable Git hooks'
        run: |
          rm -rf .git/hooks

      # Import GPG key to sign commits:
      - name: 'Import GPG key to sign commits'
        # Pin action to full length commit SHA
        uses: crazy-max/ghaction-import-gpg@e89d40939c28e39f97cf32126055eeae86ba74ec # v6.3.0
        with:
          gpg_private_key: ${{ secrets.STDLIB_BOT_GPG_PRIVATE_KEY }}
          passphrase: ${{ secrets.STDLIB_BOT_GPG_PASSPHRASE }}
          git_user_signingkey: true
          git_commit_gpgsign: true

      # Merge the develop branch into the PR branch:
      - name: 'Merge develop branch'
        env:
          REPO_GITHUB_TOKEN: ${{ secrets.STDLIB_BOT_GITHUB_TOKEN }}
          USER_NAME: stdlib-bot
          BRANCH_NAME: ${{ steps.pr-details.outputs.branch }}
          REPO_NAME: ${{ steps.pr-details.outputs.repository }}
        run: |
          # Configure Git user:
          git config --local user.email "82920195+stdlib-bot@users.noreply.github.com"
          git config --local user.name "$USER_NAME"

          # Add upstream remote pointing to the original repository:
          git remote add upstream https://github.com/stdlib-js/stdlib.git

          # Fetch the develop branch from upstream:
          git fetch upstream develop

          # Merge upstream develop into the current branch:
          git merge upstream/develop --no-edit

          # Push the updated branch back to the forked repository:
          git push "https://$USER_NAME:$REPO_GITHUB_TOKEN@github.com/$REPO_NAME.git" $BRANCH_NAME