name: Netem Interop

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
  workflow_dispatch:

permissions:
  contents: read

env:
  CARGO_TERM_COLOR: always
  GOBIN: ${{ github.workspace }}/.tools/bin
  IRTT_UPSTREAM_VERSION: v0.9.1

jobs:
  netem:
    name: netem interop
    runs-on: ubuntu-latest
    timeout-minutes: 25

    steps:
      - name: Checkout
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
        with:
          persist-credentials: false

      - name: Install Rust toolchain
        uses: actions-rust-lang/setup-rust-toolchain@46268bd060767258de96ed93c1251119784f2ab6 # v1
        with:
          cache-key: interop-netem

      - name: Check host tools
        run: |
          ip -V
          tc -V
          go version

      - name: Install upstream irtt
        run: |
          mkdir -p "$GOBIN"
          go install "github.com/heistp/irtt/cmd/irtt@${IRTT_UPSTREAM_VERSION}"
          "$GOBIN/irtt" version

      - name: Build irtt-rs CLI
        run: cargo build -p irtt-cli --locked

      - name: Run netem interop comparisons
        run: |
          python3 scripts/run_netem_interop_ci.py \
            --all \
            --skip-build \
            --upstream-irtt "$GOBIN/irtt" \
            --irtt-rs-command "$PWD/target/debug/irtt-cli"

      - name: Append netem interop summary
        if: always()
        run: |
          latest_summary="$(find target/interop-netem -mindepth 2 -maxdepth 2 -name github-step-summary.md -type f -print 2>/dev/null | sort | tail -n 1)"
          if [ -n "$latest_summary" ]; then
            cat "$latest_summary" >> "$GITHUB_STEP_SUMMARY"
          else
            echo "No netem interop github-step-summary.md found." >> "$GITHUB_STEP_SUMMARY"
          fi

      - name: Upload netem interop artifacts
        if: always()
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
        with:
          name: interop-netem
          path: target/interop-netem