name: Release

on:
  push:
    tags:
      - 'v*'
  workflow_dispatch:
    inputs:
      tag:
        description: 'Tag to release (e.g. v1.2.3)'
        required: true

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-go@v5
        with:
          go-version-file: go.mod

      - name: Test
        run: go test ./...

      - name: Lint
        run: go vet ./...

  release:
    needs: test
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - uses: actions/setup-go@v5
        with:
          go-version-file: go.mod

      - name: Build release binaries
        run: |
          VERSION="${{ github.event.inputs.tag || github.ref_name }}"
          for target in "linux/amd64" "linux/arm64" "darwin/amd64" "darwin/arm64" "windows/amd64"; do
            GOOS="${target%/*}"
            GOARCH="${target#*/}"
            EXT=""
            [ "$GOOS" = "windows" ] && EXT=".exe"
            NAME="unitdore-${GOOS}-${GOARCH}${EXT}"
            GOOS="$GOOS" GOARCH="$GOARCH" go build \
              -ldflags "-X main.version=${VERSION}" \
              -o "$NAME" .
            echo "Built $NAME"
          done

      - name: Create release and upload assets
        run: |
          TAG="${{ github.event.inputs.tag || github.ref_name }}"
          API="${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/releases"

          # Collect commits since the previous tag (or last 20 if no prior tag)
          PREV_TAG=$(git tag --sort=-version:refname | grep -v "^${TAG}$" | head -1)
          if [ -n "$PREV_TAG" ]; then
            RANGE="${PREV_TAG}..${TAG}"
          else
            RANGE="HEAD~20..HEAD"
          fi
          NOTES=$(git log "$RANGE" --pretty=format:"- %s" --no-merges)
          BODY="## What's changed"$'\n'"${NOTES}"

          # Escape for JSON
          BODY_JSON=$(printf '%s' "$BODY" | python3 -c 'import json,sys; print(json.dumps(sys.stdin.read()))')

          RELEASE=$(curl -s -X POST "$API" \
            -H "Authorization: token ${GITHUB_TOKEN}" \
            -H "Content-Type: application/json" \
            -d "{\"tag_name\":\"${TAG}\",\"name\":\"${TAG}\",\"body\":${BODY_JSON}}")

          UPLOAD_URL=$(echo "$RELEASE" | grep -o '"upload_url":"[^"]*"' | cut -d'"' -f4)
          if [ -z "$UPLOAD_URL" ]; then
            echo "Failed to create release: $RELEASE"
            exit 1
          fi

          for f in unitdore-*; do
            echo "Uploading $f..."
            curl -s -X POST "${UPLOAD_URL}?name=${f}" \
              -H "Authorization: token ${GITHUB_TOKEN}" \
              -H "Content-Type: application/octet-stream" \
              --data-binary "@${f}" > /dev/null
          done
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}