name: Docker Mod Builder

on:
  workflow_call:
    inputs:
      BASEIMAGE:
        required: true
        type: string
      MODNAME:
        required: true
        type: string
      ENDPOINT:
        required: true
        type: string
      GITHUB_REPO:
        required: true
        type: string
      MOD_VERSION:
        required: false
        type: string
    secrets:
      CR_USER:
        required: false
      CR_PAT:
        required: false
      DOCKERUSER:
        required: false
      DOCKERPASS:
        required: false

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Check Out Repo (Commit)
        uses: actions/checkout@v3
        if: ${{ github.event_name != 'pull_request_target' }}

      - name: Check Out Repo (PR)
        uses: actions/checkout@v3
        if: ${{ github.event_name == 'pull_request_target' }}
        with:
          ref: ${{ github.event.pull_request.head.sha }}

      - name: Set Vars
        run: |
          echo "BASEIMAGE=${{ inputs.BASEIMAGE }}" >> $GITHUB_ENV
          echo "BASEIMAGE=${{ inputs.BASEIMAGE }}" >> $GITHUB_STEP_SUMMARY
          echo "MODNAME=${{ inputs.MODNAME }}" >> $GITHUB_ENV
          echo "MODNAME=${{ inputs.MODNAME }}" >> $GITHUB_STEP_SUMMARY
          echo "ENDPOINT=${{ inputs.ENDPOINT }}" >> $GITHUB_ENV
          echo "ENDPOINT=${{ inputs.ENDPOINT }}" >> $GITHUB_STEP_SUMMARY
          echo "GITHUB_REPO=${{ inputs.GITHUB_REPO }}" >> $GITHUB_ENV
          echo "GITHUB_REPO=${{ inputs.GITHUB_REPO }}" >> $GITHUB_STEP_SUMMARY
          echo "MOD_VERSION=${{ inputs.MOD_VERSION }}" >> $GITHUB_ENV
          echo "MOD_VERSION=${{ inputs.MOD_VERSION }}" >> $GITHUB_STEP_SUMMARY

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2

      - name: Build image
        run: |
          docker buildx build --no-cache --build-arg MOD_VERSION=${MOD_VERSION} -t ${{ github.sha }} .

      - name: Tag image (Commit)
        if: ${{ github.event_name == 'push' && github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.GITHUB_REPO == github.repository }}
        run: |
          docker tag ${{ github.sha }} ${ENDPOINT}:${BASEIMAGE}-${MODNAME}
          docker tag ${{ github.sha }} ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
          docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}
          docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
          if [[ -n "${MOD_VERSION}" ]]; then
            docker tag ${{ github.sha }} ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}
            docker tag ${{ github.sha }} ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}-${{ github.sha }}
            docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}
            docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}-${{ github.sha }}
          fi

      - name: Tag image (PR)
        if: ${{ env.GITHUB_REPO == format('{0}/{1}', github.event.pull_request.base.repo.owner.login, github.event.pull_request.base.repo.name) }}
        run: |
          docker tag ${{ github.sha }} ${ENDPOINT}:pull_request_${{ github.event.pull_request.number }}
          docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:pull_request_${{ github.event.pull_request.number }}

      - name: Credential check
        if: ${{ github.event_name == 'push' && github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.GITHUB_REPO == github.repository || env.GITHUB_REPO == format('{0}/{1}', github.event.pull_request.base.repo.owner.login, github.event.pull_request.base.repo.name) }}
        run: |
          echo "CR_USER=${{ secrets.CR_USER }}" >> $GITHUB_ENV
          echo "CR_PAT=${{ secrets.CR_PAT }}" >> $GITHUB_ENV
          echo "DOCKERUSER=${{ secrets.DOCKERUSER }}" >> $GITHUB_ENV
          echo "DOCKERPASS=${{ secrets.DOCKERPASS }}" >> $GITHUB_ENV
          if [[ "${{ secrets.CR_USER }}" == "" && "${{ secrets.CR_PAT }}" == "" && "${{ secrets.DOCKERUSER }}" == "" && "${{ secrets.DOCKERPASS }}" == "" ]]; then
            echo "::error::Push credential secrets missing."
            echo "::error::You must set either CR_USER & CR_PAT or DOCKERUSER & DOCKERPASS as secrets in your repo settings."
            echo "::error::See https://github.com/linuxserver/docker-mods/blob/master/README.md for more information/instructions."
            exit 1
          fi

      - name: Login to GitHub Container Registry
        if: ${{ (github.event_name == 'push' && github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.GITHUB_REPO == github.repository || env.GITHUB_REPO == format('{0}/{1}', github.event.pull_request.base.repo.owner.login, github.event.pull_request.base.repo.name)) && env.CR_USER && env.CR_PAT }}
        run: |
          echo "${{ secrets.CR_PAT }}" | docker login ghcr.io -u ${{ secrets.CR_USER }} --password-stdin

      - name: Push tags to GitHub Container Registry (Commit)
        if: ${{ github.event_name == 'push' && github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.GITHUB_REPO == github.repository && env.CR_USER && env.CR_PAT }}
        run: |
          docker push ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}
          docker push ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
          echo "Pushed the following images/tags to GHCR:" >> $GITHUB_STEP_SUMMARY
          echo "ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}" >> $GITHUB_STEP_SUMMARY
          echo "ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}" >> $GITHUB_STEP_SUMMARY
          if [[ -n "${MOD_VERSION}" ]]; then
            docker push ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}
            docker push ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}-${{ github.sha }}
            echo "ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}" >> $GITHUB_STEP_SUMMARY
            echo "ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}-${{ github.sha }}" >> $GITHUB_STEP_SUMMARY
          fi

      - name: Push tags to GitHub Container Registry (PR)
        if: ${{ env.GITHUB_REPO == format('{0}/{1}', github.event.pull_request.base.repo.owner.login, github.event.pull_request.base.repo.name) && env.CR_USER && env.CR_PAT }}
        run: |
          docker push ghcr.io/${ENDPOINT}:pull_request_${{ github.event.pull_request.number }}
          echo "Pushed the following PR image/tag to GHCR:" >> $GITHUB_STEP_SUMMARY
          echo "ghcr.io/${ENDPOINT}:pull_request_${{ github.event.pull_request.number }}" >> $GITHUB_STEP_SUMMARY

      - name: Add GHCR push comment to PR
        uses: peter-evans/create-or-update-comment@v3.0.1
        if: ${{ env.GITHUB_REPO == format('{0}/{1}', github.event.pull_request.base.repo.owner.login, github.event.pull_request.base.repo.name) && env.CR_USER && env.CR_PAT }}
        with:
          token: ${{ secrets.CR_PAT }}
          issue-number: ${{ github.event.pull_request.number }}
          body: |
            PR build pushed to `ghcr.io/${{ inputs.ENDPOINT }}:pull_request_${{ github.event.pull_request.number }}`

      - name: Login to DockerHub
        if: ${{ (github.event_name == 'push' && github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.GITHUB_REPO == github.repository || env.GITHUB_REPO == format('{0}/{1}', github.event.pull_request.base.repo.owner.login, github.event.pull_request.base.repo.name)) && env.DOCKERUSER && env.DOCKERPASS }}
        run: |
          echo ${{ secrets.DOCKERPASS }} | docker login -u ${{ secrets.DOCKERUSER }} --password-stdin

      - name: Push tags to DockerHub (Commit)
        if: ${{ github.event_name == 'push' && github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.GITHUB_REPO == github.repository && env.DOCKERUSER && env.DOCKERPASS }}
        run: |
          docker push ${ENDPOINT}:${BASEIMAGE}-${MODNAME}
          docker push ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
          echo "Pushed the following images/tags to Docker Hub:" >> $GITHUB_STEP_SUMMARY
          echo "${ENDPOINT}:${BASEIMAGE}-${MODNAME}" >> $GITHUB_STEP_SUMMARY
          echo "${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}" >> $GITHUB_STEP_SUMMARY
          if [[ -n "${MOD_VERSION}" ]]; then
            docker push ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}
            docker push ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}-${{ github.sha }}
            echo "${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}" >> $GITHUB_STEP_SUMMARY
            echo "${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${MOD_VERSION}-${{ github.sha }}" >> $GITHUB_STEP_SUMMARY
          fi

      - name: Push tags to DockerHub (PR)
        if: ${{ env.GITHUB_REPO == format('{0}/{1}', github.event.pull_request.base.repo.owner.login, github.event.pull_request.base.repo.name) && env.DOCKERUSER && env.DOCKERPASS }}
        run: |
          docker push ${ENDPOINT}:pull_request_${{ github.event.pull_request.number }}
          echo "Pushed the following PR image/tag to Docker Hub:" >> $GITHUB_STEP_SUMMARY
          echo "${ENDPOINT}:pull_request_${{ github.event.pull_request.number }}" >> $GITHUB_STEP_SUMMARY