# Windows driver workspace CI — runs on the self-hosted Windows runner (home-windows-1, host mode;
# label windows-amd64). Part of the Windows-host rewrite (design/windows-host-rewrite.md, M0).
#
# Stage 1 (this file): PROBE the runner's driver toolchain (WDK / EWDK / cargo-make / LLVM / the
# inf2cat/stampinf/devgen/signtool tools) so we know what's provisioned BEFORE writing driver code,
# and build+test the owned ABI crate (pf-driver-proto) on MSVC to prove it compiles cross-OS and the
# CI wiring works. The runner has no RTX GPU — that's fine: builds, the IddCx bindgen/link, the
# /INTEGRITYCHECK self-sign-load, and (later) IDD-push frame flow on the basic display do not need one;
# only live NVENC encode does, which defers to the RTX box.
#
# shell: pwsh deliberately (PowerShell 5.1's Out-File -Encoding utf8 prepends a BOM that corrupts the
# first GITHUB_ENV line — see windows.yml).
name: windows-drivers

on:
  workflow_dispatch:
  push:
    branches: [main]
    paths:
      - '.gitea/workflows/windows-drivers.yml'
      - 'crates/pf-driver-proto/**'
      - 'packaging/windows/drivers/**'
  pull_request:
    paths:
      - '.gitea/workflows/windows-drivers.yml'
      - 'crates/pf-driver-proto/**'
      - 'packaging/windows/drivers/**'

# Driver builds need the WDK on the runner (provision once via windows-drivers-provision.yml).

jobs:
  probe-and-proto:
    runs-on: windows-amd64
    timeout-minutes: 30
    defaults:
      run:
        shell: pwsh
    steps:
      - uses: actions/checkout@v4

      - name: Probe driver toolchain (informational — never fails the job)
        continue-on-error: true
        run: |
          $ErrorActionPreference = 'Continue'
          function head($t) { Write-Host ""; Write-Host "===== $t =====" }

          head "Windows Kits roots"
          $kits = @('C:\Program Files (x86)\Windows Kits\10', 'C:\Program Files\Windows Kits\10')
          foreach ($k in $kits) { if (Test-Path $k) { Write-Host "found: $k" } }

          head "SDK Include versions (um vs km — km => WDK present)"
          foreach ($k in $kits) {
            $inc = Join-Path $k 'Include'
            if (Test-Path $inc) {
              Get-ChildItem $inc -Directory | ForEach-Object {
                $hasUm = Test-Path (Join-Path $_.FullName 'um')
                $hasKm = Test-Path (Join-Path $_.FullName 'km')
                $wdf   = Test-Path (Join-Path $_.FullName 'km\wdf\umdf\2.31')
                $iddcx = (Get-ChildItem (Join-Path $_.FullName 'um\iddcx') -Directory -ErrorAction SilentlyContinue | ForEach-Object { $_.Name }) -join ','
                Write-Host ("{0,-16} um={1,-5} km={2,-5} wdf2.31={3,-5} iddcx=[{4}]" -f $_.Name, $hasUm, $hasKm, $wdf, $iddcx)
              }
            }
          }

          head "Driver tooling (inf2cat / stampinf / signtool / devgen / InfVerif)"
          foreach ($tool in 'inf2cat.exe','stampinf.exe','signtool.exe','devgen.exe','InfVerif.exe','makecat.exe') {
            $hits = @()
            foreach ($k in $kits) {
              $hits += Get-ChildItem -Path $k -Filter $tool -Recurse -ErrorAction SilentlyContinue |
                       Where-Object { $_.FullName -match '\\x64\\' } | Select-Object -First 1 -ExpandProperty FullName
            }
            $hits = $hits | Where-Object { $_ } | Select-Object -First 1
            Write-Host ("{0,-14} -> {1}" -f $tool, ($(if ($hits) { $hits } else { 'NOT FOUND' })))
          }

          head "EWDK"
          Write-Host ("EWDKROOT = " + ($env:EWDKROOT ?? '<unset>'))

          head "LLVM / clang (bindgen 0.72 builds on the runner default clang)"
          Write-Host ("LIBCLANG_PATH = " + ($env:LIBCLANG_PATH ?? '<unset>'))
          $clang = Get-Command clang -ErrorAction SilentlyContinue
          if ($clang) { & clang --version } else { Write-Host "clang: NOT on PATH" }

          head "cargo-make (the gamepad drivers' build driver)"
          $cm = & cargo make --version 2>&1; Write-Host $cm

          head "Rust + targets"
          & rustc -V; & cargo -V
          Write-Host "installed targets:"; & rustup target list --installed

          head "Env knobs the WDK build cares about"
          Write-Host ("Version_Number = " + ($env:Version_Number ?? '<unset>'))
          Write-Host ("CARGO_HOME     = " + ($env:CARGO_HOME ?? '<unset>'))
          Write-Host ("CARGO_TARGET_DIR (daemon) = " + ($env:CARGO_TARGET_DIR ?? '<unset>'))

      - name: Build + test pf-driver-proto (MSVC)
        run: |
          # Short target dir to dodge MAX_PATH inside the deep act host workdir (see windows.yml).
          $env:CARGO_TARGET_DIR = "C:\t\drv"
          cargo build -p pf-driver-proto
          cargo test  -p pf-driver-proto
          cargo clippy -p pf-driver-proto --all-targets -- -D warnings
          cargo fmt -p pf-driver-proto -- --check

  # Build the UMDF driver workspace (wdk-probe) on windows-drivers-rs: proves wdk-sys bindgen/link works
  # on the runner's WDK + LLVM, that pf-driver-proto path-deps into a driver, and exposes the produced
  # DLL's FORCE_INTEGRITY (/INTEGRITYCHECK) bit — the M0 self-signed-load question.
  driver-build:
    runs-on: windows-amd64
    timeout-minutes: 45
    defaults:
      run:
        shell: pwsh
        # In-tree target dir on purpose: wdk-build's find_top_level_cargo_manifest() walks UP from OUT_DIR
        # to the first ancestor with a Cargo.lock, so a relocated CARGO_TARGET_DIR (C:\t\…) hides the
        # workspace lock and it panics. The driver deps have no deep CMake-from-source crates, so the
        # default in-tree target stays well under MAX_PATH (unlike the SDL3/audiopus client build).
        working-directory: packaging/windows/drivers
    env:
      # wdk-build otherwise picks 10.0.28000.0 (no km/crt) and bindgen fails — pin the WDK SDK version.
      Version_Number: '10.0.26100.0'
      # No LIBCLANG_PATH pin: the vendored bindgen 0.72 builds clean on the runner's default clang 22
      # (the shipping pack proves it). A 0.71-era layout-test overflow once needed LLVM 21; the 0.72 bump
      # retired that — see design/windows-build-and-packaging.md.
    steps:
      - uses: actions/checkout@v4
      - name: Ensure WDK + cargo-wdk (idempotent self-provision)
        # Run the provisioning script here too so driver-build is self-sufficient and never races a
        # separate provision run on the single runner. Path is relative to the job working-directory
        # (packaging/windows/drivers). Near-noop once the toolchain is present.
        run: ../../../scripts/ci/provision-windows-wdk.ps1
      - name: cargo build the driver workspace (wdk-probe + wdk-iddcx + pf-vdisplay)
        # Whole workspace: wdk-probe (toolchain/surface-assert probe) + wdk-iddcx (DDI wrappers) +
        # pf-vdisplay (the real IddCx driver). pf-vdisplay linking proves the IddCx call sites resolve
        # against IddCxStub end-to-end (M1 step 2 gate).
        run: cargo build -v
      - name: Inspect /INTEGRITYCHECK (before) — expect FORCE_INTEGRITY set by wdk-build
        run: |
          # explicit --target (.cargo/config.toml) -> output under the triple subdir.
          $dll = "target\x86_64-pc-windows-msvc\debug\pf_vdisplay.dll"
          if (-not (Test-Path $dll)) { throw "pf_vdisplay.dll not produced at $dll" }
          $b = [IO.File]::ReadAllBytes($dll)
          $pe = [BitConverter]::ToInt32($b, 0x3c)
          $dllchar = [BitConverter]::ToUInt16($b, $pe + 0x5e)   # OptionalHeader.DllCharacteristics
          Write-Host ("pf_vdisplay.dll built OK ({0:N0} bytes)" -f (Get-Item $dll).Length)
          Write-Host ("BEFORE: DllCharacteristics = 0x{0:X4}; FORCE_INTEGRITY = {1}" -f $dllchar, (($dllchar -band 0x0080) -ne 0))
      - name: Clear FORCE_INTEGRITY (self-signed-load fix) + verify
        # wdk-build sets /INTEGRITYCHECK unconditionally -> a self-signed driver won't load. Clear the PE
        # bit deterministically (the reusable packaging step; signing/.cat happen later for real drivers).
        run: ../clear-force-integrity.ps1 -Path target\x86_64-pc-windows-msvc\debug\pf_vdisplay.dll