name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

env:
  ZIG_VERSION: "0.16.0"
  NODE_VERSION: "24"

jobs:
  test:
    runs-on: ubuntu-24.04

    steps:
      - uses: actions/checkout@v4

      - name: Set up Zig
        uses: mlugg/setup-zig@v2
        with:
          version: ${{ env.ZIG_VERSION }}

      - name: Run test suite (unit + hermetic loopback integration)
        run: zig build test -Dintegration

  frontend:
    runs-on: ubuntu-24.04

    steps:
      - uses: actions/checkout@v4

      - name: Set up Node
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: npm
          cache-dependency-path: web/package-lock.json

      - name: Install dependencies
        working-directory: web
        run: npm ci

      - name: Check formatting
        working-directory: web
        run: npm run format:check

      - name: Lint
        working-directory: web
        run: npm run lint

      - name: Typecheck
        working-directory: web
        run: npm run typecheck

      - name: Run tests
        working-directory: web
        run: npm test

      - name: Build
        working-directory: web
        run: npm run build

  cross:
    runs-on: ubuntu-24.04

    steps:
      - uses: actions/checkout@v4

      - name: Set up Zig
        uses: mlugg/setup-zig@v2
        with:
          version: ${{ env.ZIG_VERSION }}

      - name: Set up Node
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: npm
          cache-dependency-path: web/package-lock.json

      - name: Build the web UI
        working-directory: web
        run: |
          npm ci
          npm run build

      # ReleaseSafe because the < 15 MB budget (PLAN §18) is for release
      # binaries; a Debug build strips to ~25 MB and can never meet it.
      - name: Build static musl executables
        run: zig build cross -Dweb-dist=web/dist -Doptimize=ReleaseSafe

      - name: Install file(1) and strip tooling
        run: |
          missing=""
          command -v file >/dev/null 2>&1 || missing="$missing file"
          command -v objcopy >/dev/null 2>&1 || missing="$missing binutils"
          command -v aarch64-linux-gnu-objcopy >/dev/null 2>&1 || missing="$missing binutils-aarch64-linux-gnu"
          if [ -n "$missing" ]; then
            sudo apt-get update -qq
            sudo apt-get install -qq -y $missing
          fi

      # The size budget applies to stripped binaries (PLAN §18) and
      # `zig build cross` does not strip, so the assert measures a
      # stripped copy and leaves the built artifact untouched.
      - name: Assert executables are statically linked and within the size budget
        run: |
          set -euo pipefail
          size_limit=$((15 * 1024 * 1024))
          for triple in x86_64-linux-musl aarch64-linux-musl; do
            binary="zig-out/cross/$triple/nxdns"
            if [ ! -f "$binary" ]; then
              echo "missing executable: $binary"
              exit 1
            fi
            description=$(file -b "$binary")
            echo "$triple: $description"
            case "$description" in
              *"statically linked"*) ;;
              *)
                echo "not statically linked: $binary"
                exit 1
                ;;
            esac
            case "$triple" in
              x86_64-*) strip_tool=objcopy ;;
              aarch64-*) strip_tool=aarch64-linux-gnu-objcopy ;;
            esac
            "$strip_tool" --strip-all "$binary" "$binary.stripped"
            size=$(stat -c %s "$binary.stripped")
            echo "$triple: stripped size $size bytes"
            if [ "$size" -ge "$size_limit" ]; then
              echo "stripped executable exceeds the 15 MB budget: $binary"
              exit 1
            fi
          done