name: pre-commit checks

on:
  pull_request:
  push:
    branches: [main]

permissions:
  contents: read

jobs:
  pre_commit:
    timeout-minutes: 5
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v5

      - name: detect changed paths
        uses: dorny/paths-filter@v3
        id: filter
        with:
          filters: |
            backend:
              - 'backend/**'
            frontend:
              - 'frontend/**'
            rust:
              - 'moderation/**'
              - 'transcoder/**'

      - name: install uv
        if: steps.filter.outputs.backend == 'true'
        uses: astral-sh/setup-uv@v7
        with:
          enable-cache: true
          cache-dependency-glob: "backend/uv.lock"

      - name: install bun
        if: steps.filter.outputs.frontend == 'true'
        uses: oven-sh/setup-bun@v2

      - name: cache frontend dependencies
        if: steps.filter.outputs.frontend == 'true'
        uses: actions/cache@v4
        with:
          path: frontend/node_modules
          key: ${{ runner.os }}-bun-${{ hashFiles('frontend/bun.lockb') }}
          restore-keys: |
            ${{ runner.os }}-bun-

      - name: install backend dependencies
        if: steps.filter.outputs.backend == 'true'
        run: cd backend && uv sync

      - name: install frontend dependencies
        if: steps.filter.outputs.frontend == 'true'
        run: cd frontend && bun install

      - name: create frontend env file
        if: steps.filter.outputs.frontend == 'true'
        run: echo "PUBLIC_API_URL=http://localhost:8001" > frontend/.env

      - name: check lockfile is up to date
        if: steps.filter.outputs.backend == 'true'
        run: |
          cd backend
          if ! uv lock --check; then
            echo "❌ lockfile is out of date!"
            echo "to update the lockfile, run 'uv lock'."
            exit 1
          fi
          echo "✅ lockfile is up to date"

      - name: build skip list
        id: skip
        run: |
          SKIP_LIST=""
          if [[ "${{ github.ref }}" == "refs/heads/main" ]]; then
            SKIP_LIST="no-commit-to-branch"
          fi
          if [[ "${{ steps.filter.outputs.backend }}" != "true" ]]; then
            SKIP_LIST="${SKIP_LIST:+$SKIP_LIST,}type-check"
          fi
          if [[ "${{ steps.filter.outputs.frontend }}" != "true" ]]; then
            SKIP_LIST="${SKIP_LIST:+$SKIP_LIST,}svelte-check,eslint"
          fi
          if [[ "${{ steps.filter.outputs.rust }}" != "true" ]]; then
            SKIP_LIST="${SKIP_LIST:+$SKIP_LIST,}cargo-check-moderation,cargo-check-transcoder"
          fi
          echo "list=$SKIP_LIST" >> $GITHUB_OUTPUT

      - name: run pre-commit
        uses: j178/prek-action@v1
        env:
          SKIP: ${{ steps.skip.outputs.list }}

      - name: prune uv cache
        if: always() && steps.filter.outputs.backend == 'true'
        run: uv cache prune --ci