name: TFLite cross-platform

# The optimized/tflite release must run identically on macOS, Linux, and
# Windows. This checks, on every OS ai-edge-litert ships wheels for:
# byte-compilation of the scripts, LiteRT importability, the weights
# link-or-copy fallback (no symlink privilege needed on Windows), console
# encoding under the runner's native code page, and --play dispatch.
# NO model downloads happen in CI.

on:
  push:
    paths:
      - "optimized/tflite/**"
      - ".github/workflows/tflite-cross-platform.yml"
  pull_request:
    paths:
      - "optimized/tflite/**"
      - ".github/workflows/tflite-cross-platform.yml"

jobs:
  test:
    strategy:
      fail-fast: false
      # Exactly the set ai-edge-litert has wheels for: manylinux x86_64 +
      # aarch64, macosx_12_0_arm64, win_amd64. No macOS-Intel (macos-13) and
      # no Windows-ARM runners — those combos have no wheel.
      matrix:
        os: [ubuntu-latest, ubuntu-24.04-arm, windows-latest, macos-latest]
    runs-on: ${{ matrix.os }}
    defaults:
      run:
        shell: bash
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Install runtime requirements
        run: python -m pip install -r optimized/tflite/requirements.txt

      - name: Byte-compile all scripts
        run: |
          python -m py_compile \
            optimized/tflite/scripts/sa3_tflite.py \
            optimized/tflite/scripts/weights.py \
            optimized/tflite/scripts/install.py \
            optimized/tflite/scripts/examples.py \
            optimized/tflite/scripts/test_windows_compat.py \
            optimized/tflite/models/defs/tflite_pipeline.py

      - name: LiteRT interpreter imports
        run: python -c "from ai_edge_litert.interpreter import Interpreter"

      - name: Windows-compat test suite
        run: python optimized/tflite/scripts/test_windows_compat.py

      - name: bootstrap.ps1 parses (PowerShell syntax check)
        shell: pwsh
        run: |
          $errs = $null
          [void][System.Management.Automation.Language.Parser]::ParseFile(
            "optimized/tflite/bootstrap.ps1", [ref]$null, [ref]$errs)
          if ($errs) { $errs | ForEach-Object { Write-Error $_.Message }; exit 1 }
          [void][System.Management.Automation.Language.Parser]::ParseFile(
            "optimized/tflite/sa3.ps1", [ref]$null, [ref]$errs)
          if ($errs) { $errs | ForEach-Object { Write-Error $_.Message }; exit 1 }

      - name: bootstrap.sh parses (bash syntax check)
        if: runner.os != 'Windows'
        run: bash -n optimized/tflite/bootstrap.sh

      # Real install flow under the OS's bash (Git Bash on Windows — the
      # environment a Windows user following the Unix instructions lands in;
      # this exact path shipped broken once: .venv/Scripts vs .venv/bin).
      - name: install.sh end-to-end + sa3 wrapper (bash on every OS)
        run: |
          cd optimized/tflite
          ./install.sh -y < /dev/null
          ./sa3 --help