name: Test safe standalone core V5

on:
  push:
    branches:
      - test/safe-core-v5
  workflow_dispatch:

permissions:
  contents: read

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: mlugg/setup-zig@v2
        with:
          version: 0.16.0

      - name: Build safe standalone variants
        shell: bash
        run: |
          set -euo pipefail
          zig build all-variants -Doptimize=ReleaseSmall \
            -Dweirdperformance=false \
            -Doutline=true

      - name: Verify minimal core layout
        shell: bash
        run: |
          set -euo pipefail
          python3 - <<'PY'
          from pathlib import Path

          root = Path("zig-out/variants")

          addr = {
              "lua_protection": 0x42A320,
              "register_commands": 0x490250,
              "glue_commands": 0x46ABB0,
              "engine_init": 0x46A400,
              "logout": 0x491180,
              "shutdown": 0x490BD0,
              "file_fallback": 0x648620,
              "open_file": 0x6477C0,
              "file_size": 0x6487F0,
              "read_file": 0x648460,
              "cleanup_file": 0x648730,
              "model_load": 0x71D4E0,
              "check_file": 0x654DD0,
          }

          def has(data, value):
              return value.to_bytes(4, "little") in data

          outline = (root / "outline.dll").read_bytes()
          custom = (root / "customassets.dll").read_bytes()
          transmog = (root / "transmogfix.dll").read_bytes()

          # Outline: only its Lua registration + engine init core hooks are allowed.
          required_outline = ("register_commands", "engine_init")
          forbidden_outline = tuple(k for k in addr if k not in required_outline)
          for k in required_outline:
              if not has(outline, addr[k]):
                  raise SystemExit(f"outline.dll missing required {k}")
          bad = [k for k in forbidden_outline if has(outline, addr[k])]
          if bad:
              raise SystemExit(f"outline.dll still contains unwanted core hooks: {bad}")
          print("outline.dll: minimal core verified")

          # CustomAssets: only CheckFileExistence is allowed from the generic core.
          if not has(custom, addr["check_file"]):
              raise SystemExit("customassets.dll missing CheckFileExistence")
          bad = [k for k,v in addr.items() if k != "check_file" and has(custom, v)]
          if bad:
              raise SystemExit(f"customassets.dll still contains unwanted core hooks: {bad}")
          print("customassets.dll: minimal core verified")

          # TransmogFix: none of the generic core hook target addresses should remain.
          bad = [k for k,v in addr.items() if has(transmog, v)]
          if bad:
              raise SystemExit(f"transmogfix.dll still contains unwanted core hooks: {bad}")
          print("transmogfix.dll: minimal core verified")

          # Compatibility repair must exist in customassets and outline.
          for name, data in (("outline.dll", outline), ("customassets.dll", custom)):
              for gate in (0x654B5C, 0x654B6A):
                  if not has(data, gate):
                      raise SystemExit(f"{name} missing MPQ gate restore address 0x{gate:X}")
              for seq in (bytes([0x74,0x25]), bytes([0x75,0x17])):
                  if seq not in data:
                      raise SystemExit(f"{name} missing original MPQ branch bytes {seq.hex()}")
          print("legacy MPQ gate repair verified")
          PY

      - name: Verify Outline Lua wrapper usage
        shell: bash
        run: |
          set -euo pipefail
          python3 - <<'PY'
          from pathlib import Path
          src = Path("src/outline/outline.zig").read_text()
          if 'hook.call(fn (usize)' in src or '0x6F39F0' in src:
              raise SystemExit("Outline still contains manual Lua API hook.call usage")
          for required in ("lua.gettop(L)", "lua.isstring(L, 1)", "lua.tostring(L, 1)", "lua.pushboolean(L"):
              if required not in src:
                  raise SystemExit(f"Missing expected Lua wrapper usage: {required}")
          print("outline.dll source: direct lua.zig wrappers verified")
          PY

      - name: Stage package
        shell: bash
        run: |
          set -euo pipefail
          mkdir -p package/DLL
          mkdir -p package/Interface/AddOns/WeirdUtils_Outline

          cp zig-out/variants/outline.dll package/DLL/
          cp zig-out/variants/customassets.dll package/DLL/
          cp zig-out/variants/transmogfix.dll package/DLL/

          cp src/outline/addon/Outline.lua package/Interface/AddOns/WeirdUtils_Outline/
          cp src/outline/addon/Bindings.xml package/Interface/AddOns/WeirdUtils_Outline/
          cp src/outline/addon/WeirdUtils_Outline.toc package/Interface/AddOns/WeirdUtils_Outline/

          cat > package/README_TEST.txt <<'EOF'
          WeirdUtils Safe Standalone Core Test V5

          This build also fixes OutlineCommand's Lua API calls after a crash at lua_pushboolean.

          outline.dll
          - Keeps only the Player_LoadScriptFunctions hook required to register OutlineCommand.
          - Keeps only the GameEngine_MainInitialize hook required to initialise the renderer.
          - Does not register the shared WeirdUtils version table.
          - Does not install generic MPQ/file hooks.
          - Uses the external WeirdUtils_Outline addon included here.

          customassets.dll
          - Keeps only CheckFileExistence from the shared file core.
          - No shared Lua registration hooks.
          - No shared engine/logout/shutdown hooks.
          - Repairs legacy File_FindInArchive NOPs if present.

          transmogfix.dll
          - Installs only TransmogFix's own module hooks.
          - No shared Lua/file/engine/logout/shutdown hooks.

          weirdperformance.dll
          - Not built here.
          - The final ZIP will use the user's original binary unchanged.
          EOF

          sha256sum package/DLL/*.dll > package/SHA256SUMS.txt

      - uses: actions/upload-artifact@v4
        with:
          name: safe-core-v5
          path: package/
          if-no-files-found: error