// vst_entry.cpp — the VST3 module class factory. Enumerates the one class this module
// offers via the SDK's factory macros. Windows module exports — GetPluginFactory (here,
// via BEGIN_FACTORY) and InitDll/ExitDll (SDK's dllmain.cpp) — are how REAPER discovers
// and loads a VST3. Verified against vendor/vst3sdk/public.sdk/source/main/: the plug-in
// must supply InitModule/DeinitModule (linked here via moduleinit.cpp). classFlags = 0 for
// a SingleComponentEffect (non-distributable), matching the AGain example.

#include "public.sdk/source/main/pluginfactory.h"

#include "pluginterfaces/vst/ivstaudioprocessor.h"  // kVstAudioEffectClass, PlugType

#include "core/version/app_version.h"       // vstPluginName / appVersion — the channel-derived identity
#include "ext_keys.h"          // kProjExtNamespace — the pairing-surface assertion target
#include "shell/instrument/reasampler_processor.h"
#include "shell/instrument/reasampler_vst.h"    // channel-selected class UID (REASAMPLER_ACTIVE_UID_*)

// The instrument's plugin identity (UID + filename + display) and its data identity
// (ext_keys.h's kProjExtNamespace(), delegating to app_version::extStateNamespace()) both
// fork from the one REASAMPLER_CHANNEL_IS_BETA bit, so a beta VST can only ever talk to
// the beta extension.
//
// The guard below pins the two forks together so a refactor cannot split them: it asserts
// the class UID this factory registers matches this binary's channel bit. If the #if in
// reasampler_vst.h picked the wrong branch, the instrument's identity would diverge from
// the namespace ext_keys reads (a beta-named plugin presenting the stable UID, or vice
// versa) — this breaks the build instead of shipping that silent split.
#if REASAMPLER_CHANNEL_IS_BETA
static_assert(REASAMPLER_ACTIVE_UID_1 == REASAMPLER_PROC_UID_BETA_1 &&
              REASAMPLER_ACTIVE_UID_2 == REASAMPLER_PROC_UID_BETA_2 &&
              REASAMPLER_ACTIVE_UID_3 == REASAMPLER_PROC_UID_BETA_3 &&
              REASAMPLER_ACTIVE_UID_4 == REASAMPLER_PROC_UID_BETA_4,
              "S18: a beta build must register the BETA class UID that pairs with the beta "
              "extension's ext-state namespace — the UID selection and the channel bit split");
#else
static_assert(REASAMPLER_ACTIVE_UID_1 == REASAMPLER_PROC_UID_1 &&
              REASAMPLER_ACTIVE_UID_2 == REASAMPLER_PROC_UID_2 &&
              REASAMPLER_ACTIVE_UID_3 == REASAMPLER_PROC_UID_3 &&
              REASAMPLER_ACTIVE_UID_4 == REASAMPLER_PROC_UID_4,
              "S18: a stable build must register the STABLE class UID that pairs with the "
              "stable ext-state namespace — the UID selection and the channel bit split");
#endif

BEGIN_FACTORY(reasampler::vst::kVendorName, reasampler::vst::kVendorUrl,
              reasampler::vst::kVendorEmail, Steinberg::PFactoryInfo::kNoFlags)

// Display name + version are channel-derived from app_version, not literals. DEF_CLASS2
// expands inside GetPluginFactory(); PClassInfo2's constructor copies the char* into its
// own buffer at that call, so .c_str() on the accessors' static-storage strings is valid.
DEF_CLASS2(INLINE_UID(REASAMPLER_ACTIVE_UID_1, REASAMPLER_ACTIVE_UID_2,
                      REASAMPLER_ACTIVE_UID_3, REASAMPLER_ACTIVE_UID_4),
           Steinberg::PClassInfo::kManyInstances,       // cardinality
           kVstAudioEffectClass,                        // component category (fixed)
           reasampler::version::vstPluginName().c_str(),  // plug-in display name (channel-derived)
           0,                                           // single-component => 0
           Steinberg::Vst::PlugType::kInstrumentSynthSampler,  // subcategory
           reasampler::version::appVersion().c_str(),   // plug-in version (channel: -beta render)
           kVstVersionString,                           // VST3 SDK version (fixed)
           reasampler::vst::ReaSamplerProcessor::createInstance)

END_FACTORY