# 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/**'
      - 'scripts/check_frontend_dep_removal.py'
      - 'tests/studio/test_frontend_dep_removal.py'
      - 'scripts/sync_allow_scripts_pins.py'
      - 'tests/studio/test_sync_allow_scripts_pins.py'
      - '.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@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
        with:
          persist-credentials: false

      # 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@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e  # v6.4.0
        with:
          node-version: '22'

      # node 22 bundles npm 10.x, which predates allowScripts. Move to the
      # 11.x line and fail loudly if the gate is still missing, so the
      # strict flag below can never silently degrade into a warning.
      - name: Upgrade npm to 11.x (allowScripts enforcement)
        working-directory: ${{ github.workspace }}
        run: |
          npm install -g npm@^11 --no-fund --no-audit
          V=$(npm -v)
          case "$V" in
            11.1[6-9].*|11.[2-9][0-9].*|1[2-9].*) echo "npm $V has allowScripts" ;;
            *) echo "::error::npm $V lacks allowScripts (need >=11.16)"; exit 1 ;;
          esac

      # Run the structural lockfile scan BEFORE npm ci. A compromised
      # tarball runs its `prepare` / `postinstall` during `npm ci`,
      # so any catch has to fire upstream of that. The scanner is
      # pure-Python read-only; safe to call ahead of every install.
      - name: Lockfile supply-chain audit (pre-install scan)
        working-directory: ${{ github.workspace }}
        run: python3 scripts/lockfile_supply_chain_audit.py

      # Dependency bumps strand the version-pinned allowScripts entries.
      # The paired pre-commit hook auto-fixes PRs; this is the backstop.
      - name: allowScripts pins must match the lockfile
        working-directory: ${{ github.workspace }}
        run: |
          python3 tests/studio/test_sync_allow_scripts_pins.py
          python3 scripts/sync_allow_scripts_pins.py --check

      - name: Lockfile must agree with package.json (npm ci is strict)
        # The vite 8 chain (rolldown, lightningcss, tailwind oxide) ships napi
        # binaries with no install scripts. The only script-bearing deps are
        # covered by `allowScripts` in package.json (npm >=11.16, default in
        # npm 12). The pre-install lockfile audit above stays the first line
        # of defence -- it fires before any tarball can run code.
        # --strict-allow-scripts: any unreviewed install script hard-fails
        # the job; the sync hook keeps the pins fresh after bumps.
        run: npm ci --strict-allow-scripts --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

      # Catch the common foot-gun: a dep dropped from package.json that is
      # still imported somewhere. The script walks the lockfile dep graph
      # from the new top-level deps and only counts top-level node_modules
      # paths as valid resolution targets for bare src/ imports.
      #
      # actions/checkout uses fetch-depth: 1 by default, so the base branch
      # is not available locally. Fetch the single base commit with an
      # explicit refspec so origin/<base> is reliably created (a bare
      # `git fetch origin <ref>` only updates FETCH_HEAD in some configs).
      - name: Dependency removal safety check
        if: github.event_name == 'pull_request'
        working-directory: ${{ github.workspace }}
        run: |
          git fetch --no-tags --depth=1 origin \
            "${{ github.base_ref }}:refs/remotes/origin/${{ github.base_ref }}"
          python3 scripts/check_frontend_dep_removal.py \
            --base "origin/${{ github.base_ref }}" \
            --enumerate-dead
          python3 tests/studio/test_frontend_dep_removal.py

      - 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
        # Always upload so a green run is reviewable too -- the dist
        # output catches "tests passed but bundle changed unexpectedly"
        # regressions that would be invisible if we only kept artifacts
        # on failure.
        if: always()
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
        with:
          name: studio-frontend-dist
          path: studio/frontend/dist
          retention-days: 3