name: Debug Registry Login

on:
  workflow_dispatch:

jobs:
  debug-login:
    runs-on: docker

    steps:
      - name: Show workflow inputs
        shell: bash
        run: |
          set -eu
          echo "REGISTRY=${{ vars.REGISTRY }}"
          echo "IMAGE_NAME=${{ vars.IMAGE_NAME }}"
          echo "USERNAME_SET=$([ -n "${{ secrets.REGISTRY_USERNAME }}" ] && echo yes || echo no)"
          echo "PASSWORD_SET=$([ -n "${{ secrets.REGISTRY_PASSWORD }}" ] && echo yes || echo no)"
          echo "USERNAME_LENGTH=$(printf '%s' '${{ secrets.REGISTRY_USERNAME }}' | wc -c)"
          echo "PASSWORD_LENGTH=$(printf '%s' '${{ secrets.REGISTRY_PASSWORD }}' | wc -c)"

      - name: Show runner and docker info
        shell: bash
        run: |
          set -eu
          uname -a
          docker version
          docker info

      - name: Probe registry endpoint
        shell: bash
        run: |
          set -eux
          curl -I --max-time 20 "https://${{ vars.REGISTRY }}/v2/" || true
          curl -sS -o /tmp/registry-body.txt -D /tmp/registry-headers.txt "https://${{ vars.REGISTRY }}/v2/" || true
          echo "Headers:"
          cat /tmp/registry-headers.txt || true
          echo "Body:"
          cat /tmp/registry-body.txt || true

      - name: Try docker/login-action
        id: login_action
        continue-on-error: true
        uses: docker/login-action@v3
        with:
          registry: ${{ vars.REGISTRY }}
          username: ${{ secrets.REGISTRY_USERNAME }}
          password: ${{ secrets.REGISTRY_PASSWORD }}

      - name: Show action result
        if: always()
        shell: bash
        run: |
          set -eu
          echo "LOGIN_ACTION_OUTCOME=${{ steps.login_action.outcome }}"
          echo "LOGIN_ACTION_CONCLUSION=${{ steps.login_action.conclusion }}"

      - name: Try direct docker login
        if: always()
        shell: bash
        run: |
          set +e
          printf '%s' '${{ secrets.REGISTRY_PASSWORD }}' | docker login "${{ vars.REGISTRY }}" \
            --username '${{ secrets.REGISTRY_USERNAME }}' \
            --password-stdin > /tmp/docker-login.out 2>&1
          status=$?
          set -e
          echo "DOCKER_LOGIN_EXIT_CODE=$status"
          cat /tmp/docker-login.out
          exit 0