name: 1. Validate Secrets
run-name: Validate Secrets (${{ github.ref_name }})
on: [workflow_call, workflow_dispatch]

jobs:
  validate-access-token:
    name: Access
    runs-on: macos-13
    env:
      GH_PAT: ${{ secrets.GH_PAT }}
      GH_TOKEN: ${{ secrets.GH_PAT }}
    outputs:
      HAS_WORKFLOW_PERMISSION: ${{ steps.access-token.outputs.has_workflow_permission }}
    steps:
      - name: Validate Access Token
        id: access-token
        run: |
          # Validate Access Token
          
          # Ensure that gh exit codes are handled when output is piped.
          set -o pipefail
          
          # Define patterns to validate the access token (GH_PAT) and distinguish between classic and fine-grained tokens.
          GH_PAT_CLASSIC_PATTERN='^ghp_[a-zA-Z0-9]{36}$'
          GH_PAT_FINE_GRAINED_PATTERN='^github_pat_[a-zA-Z0-9]{22}_[a-zA-Z0-9]{59}$'
          
          # Validate Access Token (GH_PAT)
          if [ -z "$GH_PAT" ]; then
            failed=true
            echo "::error::The GH_PAT secret is unset or empty. Set it and try again."
          else
            if [[ $GH_PAT =~ $GH_PAT_CLASSIC_PATTERN ]]; then
              provides_scopes=true
              echo "The GH_PAT secret is a structurally valid classic token."
            elif [[ $GH_PAT =~ $GH_PAT_FINE_GRAINED_PATTERN ]]; then
              echo "The GH_PAT secret is a structurally valid fine-grained token."
            else
              unknown_format=true
              echo "The GH_PAT secret does not have a known token format."
            fi
            
            # Attempt to capture the x-oauth-scopes scopes of the token.
            if ! scopes=$(curl -sS -f -I -H "Authorization: token $GH_PAT" https://api.github.com | { grep -i '^x-oauth-scopes:' || true; } | cut -d ' ' -f2- | tr -d '\r'); then
              failed=true
              if [ $unknown_format ]; then
                echo "::error::Unable to connect to GitHub using the GH_PAT secret. Verify that it is set correctly (including the 'ghp_' or 'github_pat_' prefix) and try again."
              else
                echo "::error::Unable to connect to GitHub using the GH_PAT secret. Verify that the token exists and has not expired at https://github.com/settings/tokens. If necessary, regenerate or create a new token (and update the secret), then try again."
              fi
            elif [[ $scopes =~ workflow ]]; then
              echo "The GH_PAT secret has repo and workflow permissions."
              echo "has_workflow_permission=true" >> $GITHUB_OUTPUT
            elif [[ $scopes =~ repo ]]; then
              echo "The GH_PAT secret has repo (but not workflow) permissions."
            elif [ $provides_scopes ]; then
              failed=true
              if [ -z "$scopes" ]; then
                echo "The GH_PAT secret is valid and can be used to connect to GitHub, but it does not provide any permission scopes."
              else
                echo "The GH_PAT secret is valid and can be used to connect to GitHub, but it only provides the following permission scopes: $scopes"
              fi
              echo "::error::The GH_PAT secret is lacking at least the 'repo' permission scope required to access the Match-Secrets repository. Update the token permissions at https://github.com/settings/tokens (to include the 'repo' and 'workflow' scopes) and try again."
            else
              echo "The GH_PAT secret is valid and can be used to connect to GitHub, but it does not provide inspectable scopes. Assuming that the 'repo' and 'workflow' permission scopes required to access the Match-Secrets repository and perform automations are present."
              echo "has_workflow_permission=true" >> $GITHUB_OUTPUT
            fi
          fi
          
          # Exit unsuccessfully if secret validation failed.
          if [ $failed ]; then
            exit 2
          fi
  
  validate-match-secrets:
    name: Match-Secrets
    needs: validate-access-token
    runs-on: macos-13
    env:
      GH_TOKEN: ${{ secrets.GH_PAT }}
    steps:
      - name: Validate Match-Secrets
        run: |
          # Validate Match-Secrets
          
          # Ensure that gh exit codes are handled when output is piped.
          set -o pipefail
          
          # If a Match-Secrets repository does not exist, attempt to create one.
          if ! visibility=$(gh repo view ${{ github.repository_owner }}/Match-Secrets --json visibility | jq --raw-output '.visibility | ascii_downcase'); then
            echo "A '${{ github.repository_owner }}/Match-Secrets' repository could not be found using the GH_PAT secret. Attempting to create one..."
            
            # Create a private Match-Secrets repository and verify that it exists and that it is private.
            if gh repo create ${{ github.repository_owner }}/Match-Secrets --private >/dev/null && [ "$(gh repo view ${{ github.repository_owner }}/Match-Secrets --json visibility | jq --raw-output '.visibility | ascii_downcase')" == "private" ]; then
              echo "Created a private '${{ github.repository_owner }}/Match-Secrets' repository."
            else
              failed=true
              echo "::error::Unable to create a private '${{ github.repository_owner }}/Match-Secrets' repository. Create a private 'Match-Secrets' repository manually and try again. If a private 'Match-Secrets' repository already exists, verify that the token permissions of the GH_PAT are set correctly (or update them) at https://github.com/settings/tokens and try again."
            fi
          # Otherwise, if a Match-Secrets repository exists, but it is public, cause validation to fail.
          elif [[ "$visibility" == "public" ]]; then
            failed=true
            echo "::error::A '${{ github.repository_owner }}/Match-Secrets' repository was found, but it is public. Change the repository visibility to private (or delete it) and try again. If necessary, a private repository will be created for you."
          else
            echo "Found a private '${{ github.repository_owner }}/Match-Secrets' repository to use."
          fi
          
          # Exit unsuccessfully if secret validation failed.
          if [ $failed ]; then
            exit 2
          fi
  
  validate-fastlane-secrets:
    name: Fastlane
    needs: [validate-access-token, validate-match-secrets]
    runs-on: macos-13
    env:
      GH_PAT: ${{ secrets.GH_PAT }}
      GH_TOKEN: ${{ secrets.GH_PAT }}
      FASTLANE_ISSUER_ID: ${{ secrets.FASTLANE_ISSUER_ID }}
      FASTLANE_KEY_ID: ${{ secrets.FASTLANE_KEY_ID }}
      FASTLANE_KEY: ${{ secrets.FASTLANE_KEY }}
      MATCH_PASSWORD: ${{ secrets.MATCH_PASSWORD }}
      TEAMID: ${{ secrets.TEAMID }}
    steps:
      - name: Checkout Repo
        uses: actions/checkout@v3

      # Install project dependencies
      - name: Install Project Dependencies
        run: bundle install

      - name: Validate Fastlane Secrets
        run: |
          # Validate Fastlane Secrets
          
          # Validate TEAMID
          if [ -z "$TEAMID" ]; then
            failed=true
            echo "::error::The TEAMID secret is unset or empty. Set it and try again."
          elif [ ${#TEAMID} -ne 10 ]; then
            failed=true
            echo "::error::The TEAMID secret is set but has wrong length. Verify that it is set correctly and try again."
          elif ! [[ $TEAMID =~ ^[A-Z0-9]+$ ]]; then
            failed=true
            echo "::error::The TEAMID secret is set but invalid. Verify that it is set correctly (only uppercase letters and numbers) and try again."
          fi
          
          # Validate MATCH_PASSWORD
          if [ -z "$MATCH_PASSWORD" ]; then
            failed=true
            echo "::error::The MATCH_PASSWORD secret is unset or empty. Set it and try again."
          fi
          
          # Ensure that fastlane exit codes are handled when output is piped.
          set -o pipefail
          
          # Validate FASTLANE_ISSUER_ID, FASTLANE_KEY_ID, and FASTLANE_KEY
          FASTLANE_KEY_ID_PATTERN='^[A-Z0-9]+$'
          FASTLANE_ISSUER_ID_PATTERN='^\{?[A-F0-9a-f]{8}-[A-F0-9a-f]{4}-[A-F0-9a-f]{4}-[A-F0-9a-f]{4}-[A-F0-9a-f]{12}\}?$'
          
          if [ -z "$FASTLANE_ISSUER_ID" ] || [ -z "$FASTLANE_KEY_ID" ] || [ -z "$FASTLANE_KEY" ]; then
            failed=true
            [ -z "$FASTLANE_ISSUER_ID" ] && echo "::error::The FASTLANE_ISSUER_ID secret is unset or empty. Set it and try again."
            [ -z "$FASTLANE_KEY_ID"    ] && echo "::error::The FASTLANE_KEY_ID secret is unset or empty. Set it and try again."
            [ -z "$FASTLANE_KEY"       ] && echo "::error::The FASTLANE_KEY secret is unset or empty. Set it and try again."
          elif [ ${#FASTLANE_KEY_ID} -ne 10 ]; then
            failed=true
            echo "::error::The FASTLANE_KEY_ID secret is set but has wrong length. Verify that you copied it correctly from the 'Keys' tab at https://appstoreconnect.apple.com/access/api and try again."
          elif ! [[ $FASTLANE_KEY_ID =~ $FASTLANE_KEY_ID_PATTERN ]]; then
            failed=true
            echo "::error::The FASTLANE_KEY_ID secret is set but invalid. Verify that you copied it correctly from the 'Keys' tab at https://appstoreconnect.apple.com/access/api and try again."
          elif ! [[ $FASTLANE_ISSUER_ID =~ $FASTLANE_ISSUER_ID_PATTERN ]]; then
            failed=true
            echo "::error::The FASTLANE_ISSUER_ID secret is set but invalid. Verify that you copied it correctly from the 'Keys' tab at https://appstoreconnect.apple.com/access/api and try again."
          elif ! echo "$FASTLANE_KEY" | openssl pkcs8 -nocrypt >/dev/null; then
            failed=true
            echo "::error::The FASTLANE_KEY secret is set but invalid. Verify that you copied it correctly from the API Key file (*.p8) you downloaded and try again."
          elif ! bundle exec fastlane validate_secrets 2>&1 | tee fastlane.log; then
            if grep -q "bad decrypt" fastlane.log; then
              failed=true
              echo "::error::Unable to decrypt the Match-Secrets repository using the MATCH_PASSWORD secret. Verify that it is set correctly and try again."
            elif grep -q -e "required agreement" -e "license agreement" fastlane.log; then
              failed=true
              echo "::error::Unable to create a valid authorization token for the App Store Connect API. Verify that the latest developer program license agreement has been accepted at https://developer.apple.com/account (review and accept any updated agreement), then wait a few minutes for changes to propagate and try again."
            elif ! grep -q -e "No code signing identity found" -e "Could not install WWDR certificate" fastlane.log; then
              failed=true
              echo "::error::Unable to create a valid authorization token for the App Store Connect API. Verify that the FASTLANE_ISSUER_ID, FASTLANE_KEY_ID, and FASTLANE_KEY secrets are set correctly and try again."
            fi
          fi
          
          # Exit unsuccessfully if secret validation failed.
          if [ $failed ]; then
            exit 2
          fi