name: Release Image

on:
  push:
    tags:
      - 'v*'
  workflow_dispatch:
    inputs:
      tag:
        description: 'Tag to release, for example v0.1.140'
        required: true
        type: string

jobs:
  image:
    runs-on: linux_amd64
    env:
      GITEA_BASE_URL: http://git.jianshixingqiu.com
      GITEA_API_URL: http://git.jianshixingqiu.com/api/v1
      GITEA_OWNER: kgod
      GITEA_REPO: sub2api
      IMAGE_NAME: git.jianshixingqiu.com/kgod/sub2api
    steps:
      - name: Checkout
        env:
          RELEASE_TOKEN: ${{ secrets.RELEASE_TOKEN }}
        run: |
          set -eu
          rm -rf .git
          git init
          git remote add origin "http://kgod:${RELEASE_TOKEN}@git.jianshixingqiu.com/kgod/sub2api.git"
          if [ -n "${{ inputs.tag }}" ] && [ "${GITHUB_EVENT_NAME:-}" != "workflow_dispatch" ]; then
            git fetch --depth 1 origin "refs/tags/${{ inputs.tag }}"
          else
            git fetch --depth 1 origin "$GITHUB_REF"
          fi
          git checkout --force FETCH_HEAD

      - name: Prepare metadata
        run: |
          set -eu
          if [ -n "${{ inputs.tag }}" ]; then
            TAG="${{ inputs.tag }}"
          else
            TAG="${GITHUB_REF_NAME:-${GITHUB_REF##*/}}"
          fi
          VERSION="${TAG#v}"
          COMMIT="$(git rev-parse --short=12 HEAD)"
          BUILD_DATE="$(date -u +%Y-%m-%dT%H:%M:%SZ)"

          echo "TAG=${TAG}" >> "$GITHUB_ENV"
          echo "VERSION=${VERSION}" >> "$GITHUB_ENV"
          echo "COMMIT=${COMMIT}" >> "$GITHUB_ENV"
          echo "BUILD_DATE=${BUILD_DATE}" >> "$GITHUB_ENV"

      - name: Login to Gitea Container Registry
        env:
          RELEASE_TOKEN: ${{ secrets.RELEASE_TOKEN }}
        run: |
          set -eu
          echo "$RELEASE_TOKEN" | docker login git.jianshixingqiu.com -u kgod --password-stdin

      - name: Build image
        run: |
          set -eu
          docker build \
            -f Dockerfile.gitea \
            --build-arg VERSION="$VERSION" \
            --build-arg COMMIT="$COMMIT" \
            --build-arg BUILD_DATE="$BUILD_DATE" \
            --label "org.opencontainers.image.version=$VERSION" \
            --label "org.opencontainers.image.revision=$COMMIT" \
            --label "org.opencontainers.image.source=$GITEA_BASE_URL/$GITEA_OWNER/$GITEA_REPO" \
            -t "$IMAGE_NAME:$VERSION" \
            -t "$IMAGE_NAME:latest" \
            .

      - name: Push image
        run: |
          set -eu
          docker push "$IMAGE_NAME:$VERSION"
          docker push "$IMAGE_NAME:latest"

      - name: Create Gitea release
        env:
          RELEASE_TOKEN: ${{ secrets.RELEASE_TOKEN }}
        run: |
          set -eu
          BODY="Docker image: ${IMAGE_NAME}:${VERSION}"
          PAYLOAD=$(printf '{"tag_name":"%s","target_commitish":"%s","name":"Sub2API %s","body":"%s","draft":false,"prerelease":false}' "$TAG" "$(git rev-parse HEAD)" "$VERSION" "$BODY")
          curl -fsS \
            -X POST \
            -H "Authorization: token ${RELEASE_TOKEN}" \
            -H "Content-Type: application/json" \
            -d "$PAYLOAD" \
            "$GITEA_API_URL/repos/$GITEA_OWNER/$GITEA_REPO/releases" || true