name: Backtest Gate

on:
  pull_request:
    branches: ["**"]
  push:
    branches:
      - "feature/**"
  schedule:
    # Daily scheduled gate (KST 01:20)
    - cron: "20 16 * * *"
  workflow_dispatch:
    inputs:
      mode:
        description: "backtest mode (auto|smoke|full)"
        required: false
        default: "auto"
      base_ref:
        description: "git base ref for changed-file diff"
        required: false
        default: "origin/main"

jobs:
  backtest-gate:
    runs-on: ubuntu-latest
    concurrency:
      group: backtest-gate-${{ github.ref }}
      cancel-in-progress: true

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Python 3.11
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Install dependencies
        run: pip install ".[dev]"

      - name: Resolve base ref
        id: base
        run: |
          if [ "${{ github.event_name }}" = "pull_request" ]; then
            echo "ref=origin/${{ github.base_ref }}" >> "$GITHUB_OUTPUT"
          elif [ "${{ github.event_name }}" = "workflow_dispatch" ] && [ -n "${{ github.event.inputs.base_ref }}" ]; then
            echo "ref=${{ github.event.inputs.base_ref }}" >> "$GITHUB_OUTPUT"
          else
            echo "ref=origin/main" >> "$GITHUB_OUTPUT"
          fi

      - name: Run backtest gate
        env:
          BASE_REF: ${{ steps.base.outputs.ref }}
          BACKTEST_MODE: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.mode || 'auto' }}
          FORCE_FULL_BACKTEST: ${{ github.event_name == 'schedule' && 'true' || 'false' }}
        run: bash scripts/backtest_gate.sh

      - name: Upload backtest logs
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: backtest-gate-logs
          path: data/backtest-gate/*.log