name: Validate Release PR

on:
  pull_request:
    branches: [ release-* ]
    types: [ opened, edited, reopened, synchronize ]
  merge_group:

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

jobs:
  validate-release-pr:
    runs-on: [ default ]
    defaults:
      run:
        working-directory: android
    if: github.event_name != 'merge_group'
    steps:
      - name: Checkout Repository
        uses: actions/checkout@v4
      - name: Set up PR Number
        if: always()
        run: |
          echo "ORIGINAL_PR_NUMBER=$(echo "${{ github.event.pull_request.body }}" | grep -o "https://github.com/${{ github.repository }}/pull/[0-9]*" | grep -o "[0-9]*")" >> $GITHUB_ENV
          echo "CURRENT_PR_NUMBER=${{ github.event.pull_request.number }}" >> $GITHUB_ENV
      - name: Verification Step 1 - link to master PR is added in release PR body
        if: always()
        run: |
          ORIGINAL_PR_URL="https://github.com/${{ github.repository }}/pull/$ORIGINAL_PR_NUMBER"

          echo "Original PR Number extracted: $ORIGINAL_PR_NUMBER"
          echo "Original PR Url generated: $ORIGINAL_PR_URL"
          echo "Pull request body: ${{ github.event.pull_request.body }}"

          if [[ "${{ github.event.pull_request.body }}" != *"$ORIGINAL_PR_URL"* ]]; then
            echo "Link to original PR raised against master branch not found in current PR body"
            exit 1
          fi
      - name: Verification Step 2 - release PR title matches master PR title
        if: always()
        run: |
          ORIGINAL_PR_TITLE=$(curl -L -H "Authorization: Bearer ${{ secrets.GH_PAT_RO }}" "https://api.github.com/repos/${{ github.repository }}/pulls/$ORIGINAL_PR_NUMBER" | jq -r .title)

          echo "PR Number extracted: $ORIGINAL_PR_NUMBER"
          echo "Original PR title generated: $ORIGINAL_PR_TITLE"
          echo "Current PR title extracted: ${{ github.event.pull_request.title }}"

          if [[ "${{ github.event.pull_request.title }}" != "$ORIGINAL_PR_TITLE" ]]; then
            echo "Current PR title does not match original PR title raised against master branch"
            exit 1
          fi
      - name: Verification Step 3 - master PR is merged
        if: always()
        run: |
          ORIGINAL_PR_IS_MERGED=$(curl -L -H "Authorization: Bearer ${{ secrets.GH_PAT_RO }}" "https://api.github.com/repos/${{ github.repository }}/pulls/$ORIGINAL_PR_NUMBER" | jq -r '.merged')
          BASE_REF_BRANCH=$(curl -L -H "Authorization: Bearer ${{ secrets.GH_PAT_RO }}" "https://api.github.com/repos/${{ github.repository }}/pulls/$ORIGINAL_PR_NUMBER" | jq -r '.base.ref')

          if [[ "$ORIGINAL_PR_IS_MERGED" == "true" && "$BASE_REF_BRANCH" == "master" ]]; then
            echo "Original PR is merged into master branch"
          else
            echo "Original PR number: $ORIGINAL_PR_NUMBER"
            echo "Original PR merge status: $ORIGINAL_PR_IS_MERGED"
            echo "Base branch: $BASE_REF_BRANCH"
            echo "Status: Fail. Original PR is not merged in master branch."
            exit 1
          fi
      - name: Verification Step 4 - release PR is exactly same as master PR
        if: always()
        run: |
          # Get the JSON response for the first pull request
          response_pr_master=$(curl -L -H "Authorization: Bearer ${{ secrets.GH_PAT_RO }}" "https://api.github.com/repos/${{ github.repository }}/pulls/$ORIGINAL_PR_NUMBER/files")
          files_pr_master=$(echo "$response_pr_master" | jq -r '.[].filename')
          
          # Get the JSON response for the second pull request
          response_pr_release=$(curl -L -H "Authorization: Bearer ${{ secrets.GH_PAT_RO }}" "https://api.github.com/repos/${{ github.repository }}/pulls/$CURRENT_PR_NUMBER/files")
          files_pr_release=$(echo "$response_pr_release" | jq -r '.[].filename')

          # Compare the lists of changed files
          if [ "$files_pr_master" != "$files_pr_release" ]; then
            echo "Pull requests have different sets of changed files."
            exit 1
          fi

          # Loop through each file and compare added and deleted lines
          for file in $files_pr_master; do
            details_pr_master=($(echo "$response_pr_master" | jq -r --arg file "$file" '.[] | select(.filename == $file) | .additions, .deletions'))
            details_pr_release=($(echo "$response_pr_release" | jq -r --arg file "$file" '.[] | select(.filename == $file) | .additions, .deletions'))
          
            added_lines_pr_master="${details_pr_master[0]}"
            deleted_lines_pr_master="${details_pr_master[1]}"
          
            added_lines_pr_release="${details_pr_release[0]}"
            deleted_lines_pr_release="${details_pr_release[1]}"
          
            if [ "$added_lines_pr_master" != "$added_lines_pr_release" ] || [ "$deleted_lines_pr_master" != "$deleted_lines_pr_release" ]; then
              echo "File $file has different added or deleted lines in the two pull requests."
              exit 1
            fi
          done
          
          echo "The pull requests have the same changes."