name: Release (Windows)

on:
  push:
    tags:
      - "v*"

permissions:
  contents: write

jobs:
  build-windows-installer:
    runs-on: windows-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Derive version from tag
        shell: pwsh
        run: |
          $tag = "${{ github.ref_name }}"
          $version = $tag -replace '^v', ''
          if ([string]::IsNullOrWhiteSpace($version)) {
            throw "Invalid tag: '$tag' (expected like v1.0.0)"
          }
          "TAG_NAME=$tag" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
          "VERSION=$version" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8

      - name: Generate release notes from commits
        shell: pwsh
        run: |
          git fetch --force --tags

          $tag = $env:TAG_NAME
          if ([string]::IsNullOrWhiteSpace($tag)) {
            throw "TAG_NAME is empty"
          }

          $repo = "${{ github.repository }}"

          $prev = ""
          try {
            $commit = (git rev-list -n 1 $tag).Trim()
            if (-not [string]::IsNullOrWhiteSpace($commit)) {
              $prev = (git describe --tags --abbrev=0 "$commit^" 2>$null).Trim()
            }
          } catch {}

          if ([string]::IsNullOrWhiteSpace($prev)) {
            # Fallback: best-effort previous version tag by semver-ish sorting.
            $prev = (git tag --list "v*" --sort=-v:refname | Where-Object { $_ -ne $tag } | Select-Object -First 1)
          }

          $range = ""
          if (-not [string]::IsNullOrWhiteSpace($prev)) {
            $range = "$prev..$tag"
          }

          $lines = @()
          if (-not [string]::IsNullOrWhiteSpace($range)) {
            $lines = @(git log --no-merges --pretty=format:"- %s (%h)" --reverse $range)
          } else {
            # First release tag / missing history: include a small recent window.
            $lines = @(git log --no-merges --pretty=format:"- %s (%h)" --reverse -n 50)
          }

          if (-not $lines -or $lines.Count -eq 0) {
            $lines = @("- 修复了一些已知问题，提升了稳定性。")
          }

          $max = 60
          if ($lines.Count -gt $max) {
            $total = $lines.Count
            $lines = @($lines | Select-Object -First $max)
            $lines += "- ...（共 $total 条提交，更多请查看完整变更链接）"
          }

          $body = @()
          $body += "## 更新内容 ($tag)"
          $body += ""
          $body += $lines

          if (-not [string]::IsNullOrWhiteSpace($prev)) {
            $body += ""
            $body += "完整变更: https://github.com/$repo/compare/$prev...$tag"
          }

          ($body -join "`n") | Out-File -FilePath release-notes.md -Encoding utf8

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20"
          cache: "npm"
          cache-dependency-path: |
            frontend/package-lock.json
            desktop/package-lock.json

      - name: Setup Python
        uses: actions/setup-python@v5
        with:
          python-version-file: ".python-version"

      - name: Install uv
        shell: pwsh
        run: |
          python -m pip install --upgrade pip
          python -m pip install uv

      - name: Install frontend deps
        working-directory: frontend
        run: npm ci

      - name: Install desktop deps
        working-directory: desktop
        run: npm ci

      - name: Set desktop app version (electron-builder)
        working-directory: desktop
        shell: pwsh
        run: |
          npm version $env:VERSION --no-git-tag-version --allow-same-version

      - name: Build Windows installer
        working-directory: desktop
        run: npm run dist

      - name: Create GitHub Release and upload installer
        uses: softprops/action-gh-release@v2
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: ${{ env.TAG_NAME }}
          name: ${{ env.TAG_NAME }}
          body_path: release-notes.md
          files: |
            desktop/dist/*Setup*.exe
            desktop/dist/*Setup*.exe.blockmap
            desktop/dist/latest.yml