name: Build Release

on:
  push:
    tags: ["v*"]
  workflow_dispatch:
    inputs:
      version:
        description: "Release version/tag to build, for example v1.0.0-beta"
        required: true
        type: string

env:
  APP_NAME: wavelet
  GO_MAIN: ./main.go
  GO_BUILD_TAGS: embed_frontend
  GO_LDFLAGS: -s -w
  NODE_VERSION: "22"
  PNPM_VERSION: "10.10.0"
  FRONTEND_DIR: frontend
  FRONTEND_BUILD_COMMAND: pnpm build:embed
  FRONTEND_OUT_DIR: frontend/out
  EMBED_DIST_DIR: internal/router/dist

permissions:
  contents: write

jobs:
  create-release:
    name: Create Release
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.metadata.outputs.version }}
      version_without_v: ${{ steps.metadata.outputs.version_without_v }}
      build_date: ${{ steps.metadata.outputs.build_date }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          fetch-tags: true

      - name: Set release metadata
        id: metadata
        shell: bash
        env:
          INPUT_VERSION: ${{ github.event.inputs.version }}
        run: |
          set -euo pipefail

          input_version="${INPUT_VERSION//[[:space:]]/}"
          if [[ "$GITHUB_REF" == refs/tags/* ]]; then
            version="$GITHUB_REF_NAME"
          elif [[ -n "$input_version" ]]; then
            version="$input_version"
          else
            echo "workflow_dispatch requires a version input" >&2
            exit 1
          fi

          {
            echo "version=$version"
            echo "version_without_v=${version#v}"
            echo "build_date=$(date -u +'%Y-%m-%d %H:%M:%S')"
          } >> "$GITHUB_OUTPUT"

      - name: Create release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.metadata.outputs.version }}
          name: ${{ steps.metadata.outputs.version }}
          generate_release_notes: true
          prerelease: ${{ contains(steps.metadata.outputs.version, 'alpha') || contains(steps.metadata.outputs.version, 'beta') || contains(steps.metadata.outputs.version, 'rc') }}

  build-frontend:
    name: Build Embedded Frontend
    runs-on: ubuntu-latest
    needs: create-release
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup pnpm
        uses: pnpm/action-setup@v4
        with:
          version: ${{ env.PNPM_VERSION }}
          run_install: false

      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: pnpm
          cache-dependency-path: ${{ env.FRONTEND_DIR }}/pnpm-lock.yaml

      - name: Install frontend dependencies
        working-directory: ${{ env.FRONTEND_DIR }}
        run: pnpm install --frozen-lockfile

      - name: Stamp frontend package metadata
        working-directory: ${{ env.FRONTEND_DIR }}
        shell: bash
        env:
          VERSION: ${{ needs.create-release.outputs.version_without_v }}
          BUILD_DATE: ${{ needs.create-release.outputs.build_date }}
        run: |
          set -euo pipefail
          if [[ -f package.json ]]; then
            node - <<'NODE'
          const fs = require('fs');
          const path = './package.json';
          const pkg = JSON.parse(fs.readFileSync(path, 'utf8'));
          if (process.env.VERSION && Object.hasOwn(pkg, 'version')) {
            pkg.version = process.env.VERSION;
          }
          if (process.env.BUILD_DATE && Object.hasOwn(pkg, 'buildDate')) {
            pkg.buildDate = process.env.BUILD_DATE;
          }
          fs.writeFileSync(path, JSON.stringify(pkg, null, 2) + '\n');
          NODE
          fi

      - name: Build frontend
        run: ${{ env.FRONTEND_BUILD_COMMAND }}
        working-directory: ${{ env.FRONTEND_DIR }}

      - name: Prepare embed directory
        shell: bash
        run: |
          set -euo pipefail
          rm -rf "$EMBED_DIST_DIR"
          mkdir -p "$(dirname "$EMBED_DIST_DIR")"
          cp -R "$FRONTEND_OUT_DIR" "$EMBED_DIST_DIR"

      - name: Upload embedded frontend
        uses: actions/upload-artifact@v4
        with:
          name: embedded-frontend
          path: ${{ env.EMBED_DIST_DIR }}
          if-no-files-found: error
          retention-days: 1

  build-binaries:
    name: Build ${{ matrix.goos }}/${{ matrix.goarch }}
    runs-on: ubuntu-latest
    needs:
      - create-release
      - build-frontend
    strategy:
      fail-fast: false
      matrix:
        include:
          - goos: linux
            goarch: amd64
          - goos: linux
            goarch: arm64
          - goos: darwin
            goarch: amd64
          - goos: darwin
            goarch: arm64
          - goos: windows
            goarch: amd64
          - goos: windows
            goarch: arm64
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Download embedded frontend
        uses: actions/download-artifact@v4
        with:
          name: embedded-frontend
          path: ${{ env.EMBED_DIST_DIR }}

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version-file: go.mod
          cache: true

      - name: Build binary
        shell: bash
        env:
          GOOS: ${{ matrix.goos }}
          GOARCH: ${{ matrix.goarch }}
          CGO_ENABLED: "0"
        run: |
          set -euo pipefail

          mkdir -p dist
          binary_name="$APP_NAME"
          if [[ "$GOOS" == "windows" ]]; then
            binary_name="${binary_name}.exe"
          fi

          build_args=(
            -trimpath
            -ldflags "$GO_LDFLAGS -X github.com/Rain-kl/Wavelet/internal/cmd.Version=$VERSION"
            -o "dist/$binary_name"
          )

          if [[ -n "$GO_BUILD_TAGS" ]]; then
            build_args=(-tags "$GO_BUILD_TAGS" "${build_args[@]}")
          fi

          go build "${build_args[@]}" "$GO_MAIN"

      - name: Rename binary for release
        id: package
        shell: bash
        env:
          VERSION: ${{ needs.create-release.outputs.version }}
          GOOS: ${{ matrix.goos }}
          GOARCH: ${{ matrix.goarch }}
        run: |
          set -euo pipefail

          if [[ "$GOOS" == "windows" ]]; then
            src="dist/${APP_NAME}.exe"
            artifact="dist/${APP_NAME}_${VERSION}_${GOOS}_${GOARCH}.exe"
          else
            src="dist/${APP_NAME}"
            artifact="dist/${APP_NAME}_${VERSION}_${GOOS}_${GOARCH}"
          fi

          mv "$src" "$artifact"
          echo "artifact=$artifact" >> "$GITHUB_OUTPUT"

      - name: Upload release artifact
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ needs.create-release.outputs.version }}
          files: ${{ steps.package.outputs.artifact }}