name: Create Release on Version Change

on:
  push:
    branches:
      - main
    paths:
      - package.json

  workflow_dispatch:

concurrency:
  group: release-${{ github.ref }}
  cancel-in-progress: false

jobs:
  detect:
    name: Detect Version Change
    runs-on: ubuntu-latest

    outputs:
      version: ${{ steps.version.outputs.value }}
      should_release: ${{ steps.check.outputs.should_release }}
      tag_exists: ${{ steps.tagcheck.outputs.exists }}

    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Extract version from package.json
        id: version
        run: |
          echo "value=$(jq -r .version package.json)" >> $GITHUB_OUTPUT

      - name: Check if version changed
        id: check
        shell: bash
        run: |
          if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
            echo "should_release=true" >> $GITHUB_OUTPUT
            exit 0
          fi

          if git diff "${{ github.event.before }}" "${{ github.sha }}" -- package.json | grep -q '"version"'; then
            echo "should_release=true" >> $GITHUB_OUTPUT
          else
            echo "should_release=false" >> $GITHUB_OUTPUT
          fi

      - name: Check if tag already exists
        id: tagcheck
        shell: bash
        run: |
          VERSION="${{ steps.version.outputs.value }}"

          if git rev-parse "v$VERSION" >/dev/null 2>&1; then
            echo "exists=true" >> $GITHUB_OUTPUT
          else
            echo "exists=false" >> $GITHUB_OUTPUT
          fi

  build:
    name: Build ${{ matrix.platform }}
    needs: detect

    if: |
      needs.detect.outputs.should_release == 'true' &&
      needs.detect.outputs.tag_exists != 'true'

    runs-on: ${{ matrix.os }}

    strategy:
      fail-fast: false

      matrix:
        include:
          - os: ubuntu-latest
            platform: linux
            target: node18-linux-x64
            output: ncm-api-linux-x64

          - os: windows-latest
            platform: windows
            target: node18-win-x64
            output: ncm-api-win-x64.exe

          - os: macos-latest
            platform: macos
            target: node18-macos-x64
            output: ncm-api-macos-x64

    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version: 18
          cache: pnpm

      - name: Setup pnpm
        uses: pnpm/action-setup@v6
        with:
          version: 9

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Build binary
        shell: bash
        env:
          PKG_TARGET: ${{ matrix.target }}
        run: |
          mkdir -p release-artifacts

          case "${{ matrix.platform }}" in
            linux)
              npm run pkglinux
              mv precompiled/app "release-artifacts/${{ matrix.output }}"
              ;;

            windows)
              npm run pkgwin
              mv precompiled/app.exe "release-artifacts/${{ matrix.output }}"
              ;;

            macos)
              npm run pkgmacos
              mv precompiled/app "release-artifacts/${{ matrix.output }}"
              ;;
          esac

      - name: Upload build artifact
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.platform }}-binary
          path: release-artifacts/*

  release:
    name: Create GitHub Release

    needs:
      - detect
      - build

    if: |
      needs.detect.outputs.should_release == 'true' &&
      needs.detect.outputs.tag_exists != 'true'

    runs-on: ubuntu-latest

    permissions:
      contents: write

    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0
          fetch-tags: true

      - name: Download build artifacts
        uses: actions/download-artifact@v4
        with:
          path: release-artifacts

      - name: Flatten artifacts
        shell: bash
        run: |
          mkdir -p final-artifacts

          find release-artifacts -type f -exec cp {} final-artifacts/ \;

          ls -lah final-artifacts

      - name: Generate release notes
        shell: bash
        run: |
          VERSION="${{ needs.detect.outputs.version }}"

          PREV_TAG=$(git tag --sort=-v:refname | head -1)

          {
            echo "# Release v${VERSION}"
            echo ""
            echo "## 更新内容 / Changelog"
            echo ""

            if [ -n "$PREV_TAG" ]; then
              echo "从 \`$PREV_TAG\` 到 \`v$VERSION\` 的提交记录："
              echo ""

              git log "$PREV_TAG..HEAD" \
                --no-merges \
                --pretty=format:"- %s (%h)"

            else
              echo "首次发布，包含以下提交："
              echo ""

              git log \
                --no-merges \
                --pretty=format:"- %s (%h)"
            fi

            echo ""
            echo ""
            echo "---"
            echo "自动发布 via GitHub Actions"

          } > release-notes.md

          cat release-notes.md

      - name: Create Git tag
        run: |
          git tag "v${{ needs.detect.outputs.version }}"
          git push origin "v${{ needs.detect.outputs.version }}"

      - name: Create GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: v${{ needs.detect.outputs.version }}
          name: Release v${{ needs.detect.outputs.version }}
          body_path: release-notes.md
          files: final-artifacts/*
          draft: false
          prerelease: false