name: Build docker image
description: 'builds docker image'

inputs:
  tag:
    description: 'Docker image tag'
    required: true
  REGISTRY_ACCESS_TOKEN:
    description: 'Registry token to authenticate'
    required: true
  REGISTRY_USER:
    description: 'Registry user to authenticate'
    required: true

outputs:
  image_url:
    description: 'Full image URL that was built'
    value: ${{ steps.build.outputs.image_url }}

runs:
  using: 'composite'
  steps:
    - name: Set up Docker Build
      uses: docker/setup-buildx-action@v3

    - name: Log in to registry
      uses: docker/login-action@v3
      with:
        registry: ${{ vars.INSTANCE_URL }}
        username: ${{ inputs.REGISTRY_USER }}
        password: ${{ inputs.REGISTRY_ACCESS_TOKEN }}

    - name: Set repository variable
      shell: bash
      run: |
        REPOSITORY=$(echo "${{ gitea.repository }}" | tr '[:upper:]' '[:lower:]')
        echo "REPOSITORY=$REPOSITORY" >> $GITHUB_ENV
        echo "Repository: $REPOSITORY"

    - name: Build and push image
      uses: docker/build-push-action@v6
      with:
        push: true
        tags: ${{ vars.INSTANCE_URL }}/${{ REPOSITORY }}:${{ inputs.tag }}

    - name: Set output
      shell: bash
      run: |
        echo "image_url=${{ vars.INSTANCE_URL }}/${{ gitea.repository }}:${{ inputs.tag }}" >> $GITHUB_OUTPUT