# SPDX-License-Identifier: AGPL-3.0-only
# Copyright 2026-present the Unsloth AI Inc. team. All rights reserved.

# Frontend PR gate: lockfile freshness, typecheck, build, and a bundle grep
# that catches the 2026.5.1 chat-history regression at the JS level.
#
# biome runs as non-blocking for now: the codebase currently has accumulated
# ~470 errors and ~1650 warnings against the existing biome config. Surfacing
# the count in CI lets us drive it down without forcing a fleet-wide cleanup
# in the same PR. Drop `continue-on-error` once that number is zero.

name: Frontend CI

on:
  pull_request:
    paths:
      - 'studio/frontend/**'
      - '.github/workflows/studio-frontend-ci.yml'
  push:
    branches: [main, pip]

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  build:
    name: Frontend build + bundle sanity
    runs-on: ubuntu-latest
    timeout-minutes: 10
    defaults:
      run:
        working-directory: studio/frontend
    steps:
      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1

      # FIXME: drop this step once @assistant-ui/* and assistant-stream
      # leave 0.x -- on 1.x, caret ranges are conventional. Until then,
      # every 0.minor on this surface is a SemVer-major (this is exactly
      # how 2026.5.1 shipped a broken chat runtime: ^0.12.19 quietly
      # resolved to 0.12.28).
      - name: '@assistant-ui must be pinned exactly (no caret/tilde)'
        working-directory: ${{ github.workspace }}
        run: |
          set -e
          if grep -nE '"(@assistant-ui/[a-z-]+|assistant-stream)":[[:space:]]*"[\^~]' studio/frontend/package.json; then
            echo "::error file=studio/frontend/package.json::These packages must be pinned to exact versions until they leave 0.x. Drop the leading ^ or ~."
            exit 1
          fi
          echo "All assistant-ui packages are pinned exactly."

      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020  # v4.4.0
        with:
          node-version: '22'
          cache: 'npm'
          cache-dependency-path: studio/frontend/package-lock.json

      - name: Lockfile must agree with package.json (npm ci is strict)
        run: npm ci --no-fund --no-audit

      - name: npm ci must not have modified the working tree
        working-directory: ${{ github.workspace }}
        run: |
          if ! git diff --quiet -- studio/frontend; then
            echo "::error::npm ci modified files; commit the updated lockfile"
            git status -- studio/frontend
            exit 1
          fi

      - name: Typecheck
        run: npm run typecheck

      - name: Build
        run: npm run build

      - name: Built bundle must not contain Studio's unstable_Provider call site
        run: |
          set -e
          JS=$(ls dist/assets/index-*.js | head -1)
          HITS=$(grep -c 'unstable_Provider:' "$JS" || echo 0)
          echo "main bundle: $JS"
          echo "unstable_Provider: hits=$HITS (assistant-ui internals contribute up to 3)"
          if [ "$HITS" -gt 3 ]; then
            echo "::error file=studio/frontend/src/features/chat/runtime-provider.tsx::Studio bundle still passes unstable_Provider through useRemoteThreadListRuntime; this is the 2026.5.1 chat-history regression. Pass adapters directly into useLocalRuntime instead."
            exit 1
          fi

      - name: Bundle size budget (75 MB)
        run: |
          SIZE=$(du -sb dist | cut -f1)
          BUDGET=$((75 * 1024 * 1024))
          echo "dist size: $SIZE bytes ($((SIZE/1024/1024)) MB), budget: $BUDGET bytes (75 MB)"
          if [ "$SIZE" -gt "$BUDGET" ]; then
            echo "::error::studio/frontend/dist/ exceeded the 75 MB budget. Drop dead deps (e.g. the unused next dep) or split chunks."
            exit 1
          fi

      - name: Biome (non-blocking until accumulated drift is cleared)
        continue-on-error: true
        run: npm run biome:check

      - name: Upload built dist on failure
        if: failure()
        uses: actions/upload-artifact@v4
        with:
          name: studio-frontend-dist
          path: studio/frontend/dist
          retention-days: 3