name: Check Existing Artifact
on:
  workflow_call:
    inputs:
      env_json:
        required: true
        type: string
    secrets:
      GITEA_TOKEN:
        required: true
    outputs:
      artifact_exists:
        value: ${{ jobs.check.outputs.artifact_exists }}
      version:
        value: ${{ jobs.check.outputs.version }}

env:
  GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
  GIT_TAG_PREFIX: ${{ fromJson(inputs.env_json).GIT_TAG_PREFIX || '' }}
  VERSION_FILE: ${{ fromJson(inputs.env_json).VERSION_FILE || '' }}

jobs:
  check:
    runs-on: ubuntu-latest
    outputs:
      artifact_exists: ${{ steps.set-outputs.outputs.artifact_exists }}
      version: ${{ steps.set-outputs.outputs.version }}
    steps:
      - uses: actions/checkout@v4

      - name: Check existing artifact and calculate version
        run: |
          if [ -n "${VERSION_FILE}" ]; then
            if echo "${VERSION_FILE}" | grep -q '\.json$'; then
              RAW_VERSION=$(jq -r '.version' "${VERSION_FILE}")
            else
              RAW_VERSION=$(cat "${VERSION_FILE}" | tr -d '[:space:]')
            fi
          elif [ -f VERSION ]; then
            RAW_VERSION=$(cat VERSION | tr -d '[:space:]')
          elif [ -f package.json ]; then
            RAW_VERSION=$(jq -r '.version' package.json)
          elif [ -f pom.xml ]; then
            RAW_VERSION=$(grep -oP '<version>\K[^<]+' pom.xml | head -1)
          elif [ -f Chart.yaml ]; then
            RAW_VERSION=$(grep -oP '^version:\s*\K\S+' Chart.yaml)
          else
            echo "ERROR: No VERSION file, package.json, pom.xml, or Chart.yaml found" >&2
            exit 1
          fi
          BASE_VERSION=$(echo "$RAW_VERSION" | cut -d'.' -f1-2)
          echo "gitea-ci-library - Tunnistettu Major.Minor versio: $BASE_VERSION"

          TAGS_JSON=$(curl -s -f -H "Authorization: token $GITEA_TOKEN" \
            "${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}/tags")

          TAG=$(echo "$TAGS_JSON" | jq -r --arg prefix "${GIT_TAG_PREFIX}" '
            if type == "array" then
              .[] | select(.commit.sha == "${{ github.sha }}" and (.name | startswith($prefix))) | .name
            else empty end' | head -1)

          mkdir -p /tmp/build-ctx

          if [ -n "$TAG" ]; then
            echo "ARTIFACT_EXISTS=true" > /tmp/build-ctx/build.env
            echo "NEXT_VERSION=$TAG" >> /tmp/build-ctx/build.env
            echo "gitea-ci-library - Artefakti löytyi jo tagilla: $TAG."
          else
            echo "ARTIFACT_EXISTS=false" > /tmp/build-ctx/build.env

            HIGHEST_PATCH=$(echo "$TAGS_JSON" | jq -r --arg prefix "${GIT_TAG_PREFIX}" --arg bv "${GIT_TAG_PREFIX}${BASE_VERSION}." '
              if type == "array" then .[] | .name | select(startswith($bv)) | sub($bv; "") | tonumber else empty end' | sort -rn | head -1)

            if [ -z "$HIGHEST_PATCH" ]; then NEXT_PATCH=0; else NEXT_PATCH=$((HIGHEST_PATCH + 1)); fi
            FULL_VERSION="${BASE_VERSION}.${NEXT_PATCH}"

            echo "NEXT_VERSION=$FULL_VERSION" >> /tmp/build-ctx/build.env
            echo "gitea-ci-library - Uusi vapaa versio: $FULL_VERSION"
          fi

      - name: Set job outputs
        id: set-outputs
        run: |
          source /tmp/build-ctx/build.env
          echo "artifact_exists=$ARTIFACT_EXISTS" >> "$GITHUB_OUTPUT"
          echo "version=$NEXT_VERSION" >> "$GITHUB_OUTPUT"