name: CI — UVM TB Generator

on:
  push:
    branches: [main, develop]
    paths-ignore: ["docs/**", "README.md"]
  pull_request:
    branches: [main]
  workflow_dispatch:

env:
  PYTHON_VERSION: "3.11"

jobs:
  lint:
    name: Lint & Format Check
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: ${{ env.PYTHON_VERSION }}
      - name: Install dependencies
        run: |
          pip install flake8 black yamllint
          pip install -r requirements.txt
      - name: Run flake8
        run: flake8 src/ tests/ --max-line-length=120 --extend-ignore=E203
      - name: Run yamllint on configs and protocols
        run: yamllint configs/ protocols/

  test:
    name: Tests (Python ${{ matrix.python-version }})
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: ["3.10", "3.11", "3.12"]
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}
      - name: Install dependencies
        run: |
          pip install pytest pytest-cov
          pip install -r requirements.txt
      - name: Run tests with coverage
        run: |
          python -m pytest tests/ -v --cov=src --cov-report=xml --cov-report=term-missing
      - name: Upload coverage
        uses: codecov/codecov-action@v5
        with:
          file: ./coverage.xml
          fail_ci_if_error: false

  generate:
    name: Generation Smoke Test
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: ${{ env.PYTHON_VERSION }}
      - name: Install dependencies
        run: |
          pip install -r requirements.txt
      - name: Generate from YAML spec
        run: |
          python -m src.main --spec configs/uart_demo.yaml --json
      - name: Generate from .core file
        run: |
          python -m src.main --spec configs/uart16550-1.5.core --json
      - name: Verify output files exist
        run: |
          test -d output/uart_tb
          test -f output/uart_tb/testbench.sv
          test -f output/uart_tb/interface_uart.sv
          test -d output/uart16550_tb
          test -f output/uart16550_tb/testbench.sv
          echo "All output files verified"
      - name: Verify API server imports
        run: |
          python -c "from src.api.server import app; print('API server OK')"

  regression:
    name: Multi-Seed Regression Test
    runs-on: ubuntu-latest
    needs: [generate]
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: ${{ env.PYTHON_VERSION }}
      - name: Install dependencies
        run: |
          pip install -r requirements.txt
      - name: Run auto-training with 3 seeds
        run: |
          python -m src.main --spec configs/uart16550-1.5.core --auto-train \
            --max-iterations 3 --coverage-target 75 --simulator stub
      - name: Export coverage trend
        run: |
          python -c "
          import json
          from pathlib import Path
          trend_file = next(Path('output').rglob('*coverage_trend*'), None)
          if trend_file:
              print('Coverage trend:')
              print(trend_file.read_text())
          else:
              # Show registry content
              reg_dir = Path('output') / 'model_registry'
              if reg_dir.exists():
                  versions = sorted(reg_dir.iterdir())
                  print(f'Versions: {[v.name for v in versions]}')
          " || true
      - name: Verify FuseSoC .core file generated
        run: |
          test -f output/uart16550_tb/uart16550.core && echo "FuseSoC .core found" || echo "No FuseSoC core"

  schema:
    name: Schema Validation
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: ${{ env.PYTHON_VERSION }}
      - name: Install deps
        run: pip install pyyaml jsonschema
      - name: Validate demo specs against schema
        run: |
          python -c "
import json, yaml, sys
from jsonschema import validate

with open('configs/schema/master_schema.json') as f:
    schema = json.load(f)

for spec_file in ['configs/uart_demo.yaml', 'configs/uart16550-1.5.core']:
    with open(spec_file) as f:
        if spec_file.endswith('.core'):
            # .core files wrap spec in a different format; validate the relevant parts
            data = yaml.safe_load(f)
        else:
            data = yaml.safe_load(f)
    try:
        validate(instance=data, schema=schema)
        print(f'OK: {spec_file} passes schema')
    except Exception as e:
        print(f'FAIL: {spec_file} — {e}')
        sys.exit(1)
"