name: Solver regression

on:
  push:
    paths:
      - "app/simulation/**"
      - "tests/**"
      - "requirements.txt"
      - "constraints/**"
      - ".python-version"
      - "README.md"
      - ".github/workflows/solver-regression.yml"
  pull_request:
    paths:
      - "app/simulation/**"
      - "tests/**"
      - "requirements.txt"
      - "constraints/**"
      - ".python-version"
      - "README.md"
      - ".github/workflows/solver-regression.yml"
  schedule:
    - cron: "17 3 * * 1-6"
    - cron: "17 3 * * 0"
  workflow_dispatch:
    inputs:
      suite:
        description: Regression tier
        required: true
        default: quick
        type: choice
        options:
          - quick
          - historical
          - main-long
      case:
        description: Longest main-model horizon (predecessors run first)
        required: true
        default: 0.2s
        type: choice
        options:
          - 0.2s
          - 1s
          - 5s
          - 10s
      lane:
        description: Output sampling lane
        required: true
        default: production
        type: choice
        options:
          - solver-only
          - production

concurrency:
  group: solver-regression-${{ github.ref }}-${{ github.event_name }}
  cancel-in-progress: false

permissions:
  contents: read

jobs:
  quick:
    if: >-
      github.event_name == 'push' ||
      github.event_name == 'pull_request' ||
      (github.event_name == 'workflow_dispatch' && inputs.suite == 'quick')
    runs-on: ubuntu-24.04
    timeout-minutes: 15
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version-file: .python-version
          cache: pip
          cache-dependency-path: |
            requirements.txt
            constraints/python312-direct.txt
      - name: Install reference dependencies
        run: |
          python -m pip install \
            -r requirements.txt \
            -c constraints/python312-direct.txt
          python -m pip check
      - name: Run solver foundation tests
        env:
          SYSTEM_SIMULATION_VERIFY_LOCKED_ENV: "1"
        run: |
          python -W error::ResourceWarning -m unittest \
            tests.test_dependency_constraints \
            tests.test_benchmark_regression \
            tests.test_test_mql_8_regression \
            tests.test_mql_full_branches_regression \
            tests.test_pressure_flow_causal_execution \
            tests.test_stream_pressure_block_solver \
            tests.test_core_solver \
            tests.test_supported_piston_tangent \
            tests.test_three_piston_tangent \
            tests.test_sparse_secant_jacobian \
            tests.test_generic_jacobian_sparsity \
            tests.test_generic_system_xml_simulation

  historical-nightly:
    if: >-
      (github.event_name == 'schedule' && github.event.schedule == '17 3 * * 1-6') ||
      (github.event_name == 'workflow_dispatch' && inputs.suite == 'historical')
    runs-on: ubuntu-24.04
    timeout-minutes: 15
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version-file: .python-version
          cache: pip
          cache-dependency-path: |
            requirements.txt
            constraints/python312-direct.txt
      - name: Install reference dependencies
        run: |
          python -m pip install \
            -r requirements.txt \
            -c constraints/python312-direct.txt
          python -m pip check
      - name: Run 0.81 and 2.10 second historical regression
        run: |
          mkdir -p artifacts
          python -m app.simulation.benchmark_regression \
            --manifest tests/baselines/simulation/test_mql_full_branches/manifest.json \
            --lane solver-only \
            --output artifacts/test-mql-full-branches.json
      - if: always()
        uses: actions/upload-artifact@v4
        with:
          name: historical-solver-regression
          path: artifacts/*.json
          if-no-files-found: warn

  main-periodic:
    if: >-
      (github.event_name == 'schedule' && github.event.schedule == '17 3 * * 0') ||
      (github.event_name == 'workflow_dispatch' && inputs.suite == 'main-long')
    runs-on: ubuntu-24.04
    timeout-minutes: 180
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version-file: .python-version
          cache: pip
          cache-dependency-path: |
            requirements.txt
            constraints/python312-direct.txt
      - name: Install reference dependencies
        run: |
          python -m pip install \
            -r requirements.txt \
            -c constraints/python312-direct.txt
          python -m pip check
      - name: Run bounded progressive main-model regression
        env:
          REQUESTED_CASE: ${{ github.event_name == 'workflow_dispatch' && inputs.case || '10s' }}
          REQUESTED_LANE: ${{ github.event_name == 'workflow_dispatch' && inputs.lane || 'production' }}
        run: |
          mkdir -p artifacts
          python -m app.simulation.benchmark_regression \
            --manifest tests/baselines/simulation/test_mql_8/manifest.json \
            --lane "$REQUESTED_LANE" \
            --case "$REQUESTED_CASE" \
            --output artifacts/test-mql-8-progressive.json
      - if: always()
        uses: actions/upload-artifact@v4
        with:
          name: main-model-progressive-regression
          path: artifacts/*.json
          if-no-files-found: warn