path: root/source/20-codegen-compiler/CodegenModel.cpp

#include "CodegenModel.hpp"
#include "CodegenModelArchive.hpp"

#include "CodegenUtils.hpp"

#include <Macros.hpp>
#include <ScopeGuard.hpp>
#include <Utils.hpp>

#include <robin_hood.h>
#include <cassert>
#include <cstdint>
#include <stdexcept>
#include <string>
#include <variant>

using namespace std::literals;

// TODO only delete unused records from model instead of regenerating all records every time

struct SomeDecl {
	std::variant<DeclStruct, DeclFunction, DeclEnum> v;
};

class CodegenModel::Private {
	friend class CodegenModelArchive;

public:
	// We want address stability for everything
	robin_hood::unordered_node_map<std::string, SomeDecl, StringHash, StringEqual> decls;
	robin_hood::unordered_node_map<std::string, DeclNamespace, StringHash, StringEqual> namespaces;
};

// A number for `PRAGMA user_vesrion`, representing the current database version. Increment when the table format changes.
#define CURRENT_DATABASE_VERSION 1
constexpr int64_t kGlobalNamespaceId = 1;
constexpr int64_t kNoFileId = 1;

struct SQLiteDatabase {
	sqlite3* database = nullptr;

	~SQLiteDatabase() {
		// NOTE: calling with NULL is a harmless no-op
		int result = sqlite3_close(database);
		assert(result == SQLITE_OK);
	}

	operator sqlite3*() const { return database; }
	sqlite3** operator&() { return &database; }
};

struct SQLiteStatement {
	sqlite3_stmt* stmt = nullptr;

	SQLiteStatement(const SQLiteStatement&) = delete;
	SQLiteStatement& operator=(const SQLiteStatement&) = delete;

	SQLiteStatement() = default;

	SQLiteStatement(sqlite3* database, std::string_view sql) {
		Initialize(database, sql);
	}

	~SQLiteStatement() {
		// NOTE: calling with NULL is a harmless no-op
		// NOTE: we don't care about the error code, because they are returned if the statement has errored in the most recent execution
		//       but deleting it will succeeed anyways
		sqlite3_finalize(stmt);
	}

	operator sqlite3_stmt*() const { return stmt; }
	sqlite3_stmt** operator&() { return &stmt; }

	void Initialize(sqlite3* database, std::string_view sql) {
		int result = sqlite3_prepare(database, sql.data(), sql.size(), &stmt, nullptr);
		assert(result == SQLITE_OK);
	}

	bool InitializeLazily(sqlite3* database, std::string_view sql) {
		if (!stmt) {
			Initialize(database, sql);
			return true;
		}
		return false;
	}
};

namespace {
void PrintErrMsgIfPresent(char*& errMsg) {
	if (errMsg) {
		printf("SQLite error: %s\n", errMsg);
		sqlite3_free(errMsg);
	}
}
} // namespace

class CodegenModelArchive::Private {
	friend class CodegenModel;

public:
	// NOTE: this must be the first field, because we want it to destruct after all other statement fields
	SQLiteDatabase database;
	/* Core Statements */
	SQLiteStatement beginTransactionStmt;
	SQLiteStatement commitTransactionStmt;
	SQLiteStatement rollbackTransactionStmt;
	SQLiteStatement findFileStmt;
	SQLiteStatement storeFileStmt;
	SQLiteStatement findNamespaceStmt;
	SQLiteStatement getNamespaceStmt;
	SQLiteStatement storeNamespaceStmt;
	/* Component Statements, initalized on demand */
	SQLiteStatement storeStructStmt;
	SQLiteStatement storeStructBaseClassStmt;
	SQLiteStatement storeStructPropertyStmt;
	// TODO store method
	SQLiteStatement storeEnumStmt;
	SQLiteStatement storeEnumElmStmt;
	SQLiteStatement deleteFunctionDeclByFilenameStmt;
	SQLiteStatement deleteStructDeclByFilenameStmt;
	SQLiteStatement deleteEnumDeclByFilenameStmt;
	// TODO
	// SQLiteStatement getRootClassStmt;

	void InitializeDatabase() {
		char* errMsg = nullptr;

		int result = sqlite3_exec(database, "PRAGMA user_version = " STRINGIFY(CURRENT_DATABASE_VERSION), nullptr, nullptr, &errMsg);
		PrintErrMsgIfPresent(errMsg);
		assert(result == SQLITE_OK);

		// TODO unique with overloading, and container structs
		result = sqlite3_exec(database, R"""(
BEGIN TRANSACTION;
CREATE TABLE Files(
	-- NOTE: SQLite forbids foreign keys referencing the implicit `rowid` column, we have to create an alias for it
	Id INTEGER PRIMARY KEY,
	FileName TEXT,
	UNIQUE (FileName)
);

CREATE TABLE Namespaces(
	Id INTEGER PRIMARY KEY,
	ParentNamespaceId INTEGER REFERENCES Namespaces(Id),
	Name TEXT,
	UNIQUE (ParentNamespaceId, Name)
);

CREATE TABLE DeclFunctions(
	Id INTEGER PRIMARY KEY,
	FileId INTEGER REFERENCES Files(Id) ON DELETE CASCADE,
	NamespaceId INTEGER REFERENCES Namespaces(Id),
	Name TEXT
);
CREATE TABLE DeclFunctionParameters(
	FunctionId INTEGER REFERENCES DeclFunctions(Id) ON DELETE CASCADE,
	Name TEXT,
	Type TEXT,
	UNIQUE (FunctionId, Name)
);

CREATE TABLE DeclStructs(
	Id INTEGER PRIMARY KEY,
	FileId INTEGER REFERENCES Files(Id) ON DELETE CASCADE,
	NamespaceId INTEGER REFERENCES Namespaces(Id),
	Name TEXT,
	IsMetadataMarked INTEGER
);
CREATE TABLE DeclStructBaseClassRelations(
	StructId INTEGER REFERENCES DeclStructs(Id) ON DELETE CASCADE,
	-- NOTE: intentionally not foreign keys, because we want relations to still exist even if the base class is deleted
	--       we do validation after a complete regeneration pass, on reads
	ParentStructNamespaceId INTEGER,
	ParentStructName TEXT,
	UNIQUE (StructId, ParentStructNamespaceId, ParentStructName)
);
CREATE TABLE DeclStructProperties(
	StructId INTEGER REFERENCES DeclStructs(Id) ON DELETE CASCADE,
	Name TEXT,
	Type TEXT,
	-- NOTE: getter and setter may or may not be methods; search the DeclStructMethods table if needed
	GetterName TEXT,
	SetterName TEXT,
	IsPlainField INTEGER GENERATED ALWAYS AS (GetterName = '' AND SetterName = '') VIRTUAL,
	IsMetadataMarked INTEGER
);
CREATE TABLE DeclStructMethods(
	Id INTEGER PRIMARY KEY,
	StructId INTEGER REFERENCES DeclStructs(Id) ON DELETE CASCADE,
	Name TEXT,
	Type TEXT,
	IsConst INTEGER,
	IsMetadataMarked INTEGER
);
CREATE TABLE DeclStructMethodParameters(
	MethodId INTEGER REFERENCES DeclStructMethods(Id) ON DELETE CASCADE,
	Name TEXT,
	Type TEXT,
	UNIQUE (MethodId, Name)
);

CREATE TABLE DeclEnums(
	Id INTEGER PRIMARY KEY,
FileId INTEGER REFERENCES Files(Id) ON DELETE CASCADE,
	NamespaceId INTEGER REFERENCES Namespaces(Id),
	Name TEXT,
	UnderlyingType TEXT
);
CREATE TABLE DeclEnumElements(
	EnumId INTEGER REFERENCES DeclEnums(Id) ON DELETE CASCADE,
	Name TEXT,
	Value INTEGER,
	UNIQUE (EnumId, Name)
);

CREATE INDEX Index_DeclFunctions_FileId ON DeclFunctions(FileId);
CREATE INDEX Index_DeclStructs_FileId ON DeclStructs(FileId);
CREATE INDEX Index_DeclEnums_FileId ON DeclEnums(FileId);

CREATE UNIQUE INDEX Index_DeclFunctions_Identity ON DeclFunctions(NamespaceId, Name);

CREATE UNIQUE INDEX Index_DeclStruct_Identity ON DeclStructs(NamespaceId, Name);
CREATE UNIQUE INDEX Index_DeclStructProperties_Identity ON DeclStructProperties(StructId, Name);
CREATE UNIQUE INDEX Index_DeclStructMethods_Identity ON DeclStructMethods(StructId, Name);

CREATE UNIQUE INDEX Index_DeclEnums_Identity ON DeclEnums(NamespaceId, Name);

INSERT INTO Files(Id, FileName)
VALUES (1, '');

-- Special global namespace that has no parent, and Id should always be 1
INSERT INTO Namespaces(Id, ParentNamespaceId, Name)
VALUES (1, NULL, '<global namespace>');

COMMIT TRANSACTION;
)""",
			nullptr,
			nullptr,
			&errMsg);
		PrintErrMsgIfPresent(errMsg);
		assert(result == SQLITE_OK);
	}

	void BeginTransaction() {
		int result = sqlite3_step(beginTransactionStmt);
		assert(result == SQLITE_DONE);
		sqlite3_reset(beginTransactionStmt);
	}

	void CommitTransaction() {
		int result = sqlite3_step(commitTransactionStmt);
		assert(result == SQLITE_DONE);
		sqlite3_reset(commitTransactionStmt);
	}

	void RollbackTransaction() {
		int result = sqlite3_step(rollbackTransactionStmt);
		assert(result == SQLITE_DONE);
		sqlite3_reset(rollbackTransactionStmt);
	}

	/// \return Row ID of the namespace, or 0 if it currently doesn't exist.
	int64_t FindNamespace(const DeclNamespace* ns) {
		if (!ns) {
			return kGlobalNamespaceId;
		}

		return FindNamespaceImpl(*ns);
	}

	/// \return Row ID of the namespace.
	int64_t FindOrStoreNamespace(const DeclNamespace* ns) {
		if (!ns) {
			return kGlobalNamespaceId;
		}

		if (auto rowId = FindNamespaceImpl(*ns); rowId != 0) {
			return rowId;
		}

		sqlite3_stmt* stmt = storeNamespaceStmt;
		int64_t parentRowId = FindOrStoreNamespace(ns->container);
		sqlite3_bind_int64(stmt, 1, parentRowId);
		sqlite3_bind_text(stmt, 2, ns->name.c_str(), ns->name.size(), nullptr);

		int result = sqlite3_step(stmt);
		DEFER {
			sqlite3_reset(stmt);
			sqlite3_clear_bindings(stmt);
		};
		assert(result == SQLITE_ROW);

		auto nsId = sqlite3_column_int64(stmt, 0);
		return nsId;
	}

	// TODO maybe merge with Utils::MakeFullName?
	std::string GetNamespaceFullName(int64_t nsId) {
		std::vector<std::string> namespaceNames;
		size_t fullnameLength = 0;

		sqlite3_stmt* stmt = getNamespaceStmt;
		int64_t currentNsId = nsId;
		while (true) {
			sqlite3_bind_int64(stmt, 1, currentNsId);

			int result = sqlite3_step(stmt);
			DEFER {
				sqlite3_reset(stmt);
				sqlite3_clear_bindings(stmt);
			};
			assert(result == SQLITE_ROW);

			/* 0th column Id */
			int64_t parentNamespaceId = sqlite3_column_int64(stmt, 1);
			auto nameCstr = (const char*)sqlite3_column_text(stmt, 2);

			currentNsId = parentNamespaceId;
			std::string name(nameCstr);
			fullnameLength += name.size() + 2;
			namespaceNames.push_back(std::move(name));

			if (parentNamespaceId == kGlobalNamespaceId) {
				break;
			}
		}
		fullnameLength -= 2;

		std::string fullname;
		fullname.reserve(fullnameLength);

		for (auto it = namespaceNames.rbegin(); it != namespaceNames.rend(); ++it) {
			fullname.append(*it);
			if (std::next(it) != namespaceNames.rend()) {
				fullname.append("::");
			}
		}

		return fullname;
	}

	std::string GetDeclFullName(int64_t nsId, std::string_view declName) {
		return GetNamespaceFullName(nsId).append(declName);
	}

	/// \return Row ID of the file, or 0 if it currently doesn't exist.
	int64_t FindFile(std::string_view filename) {
		sqlite3_stmt* stmt = findFileStmt;
		sqlite3_bind_text(stmt, 1, filename.data(), filename.size(), nullptr);

		int result = sqlite3_step(stmt);
		DEFER {
			sqlite3_reset(stmt);
			sqlite3_clear_bindings(stmt);
		};

		if (result == SQLITE_ROW) {
			auto fileId = sqlite3_column_int64(stmt, 0);
			return fileId;
		} else {
			return 0;
		}
	}

	/// \return Row ID of the file
	int64_t FindOrStoreFile(std::string_view filename) {
		if (auto id = FindFile(filename); id != 0) {
			return id;
		}

		sqlite3_stmt* stmt = storeFileStmt;
		sqlite3_bind_text(stmt, 1, filename.data(), filename.size(), nullptr);

		int result = sqlite3_step(stmt);
		DEFER {
			sqlite3_reset(stmt);
			sqlite3_clear_bindings(stmt);
		};
		assert(result == SQLITE_ROW);

		auto fileId = sqlite3_column_int64(stmt, 0);
		return fileId;
	}

	/// \return Row ID of the file
	int64_t FindOrStoreFile(/*nullable*/ const SourceFile* file) {
		if (!file) {
			return kNoFileId;
		}
		return FindOrStoreFile(file->filename);
	}

private:
	int64_t FindNamespaceImpl(const DeclNamespace& ns) {
		int64_t parentNsRowId;
		if (ns.container) {
			parentNsRowId = FindNamespaceImpl(*ns.container);
			if (parentNsRowId == 0) {
				// Parent namespace doesn't exist in database, shortcircuit
				return 0;
			}
		} else {
			parentNsRowId = kGlobalNamespaceId;
		}

		return FindNamespaceImpl(ns, parentNsRowId);
	}

	int64_t FindNamespaceImpl(const DeclNamespace& ns, int64_t parentNsRowId) {
		sqlite3_stmt* stmt = findNamespaceStmt;
		sqlite3_bind_int64(stmt, 1, parentNsRowId);
		sqlite3_bind_text(stmt, 2, ns.name.c_str(), ns.name.size(), nullptr);

		int result = sqlite3_step(stmt);
		DEFER {
			sqlite3_reset(stmt);
			sqlite3_clear_bindings(stmt);
		};

		if (result == SQLITE_ROW) {
			int64_t nsId = sqlite3_column_int64(stmt, 0);
			return nsId;
		} else {
			return 0;
		}
	}
};

CodegenModel::CodegenModel()
	: m{ new Private() } //
{
}

CodegenModel::~CodegenModel() {
	delete m;
}

#define STORE_DECL_OF_TYPE(DeclType, fullname, decl)                                                    \
	auto [iter, success] = m->decls.try_emplace(std::move(fullname), SomeDecl{ .v = std::move(decl) }); \
	auto& key = iter->first;                                                                            \
	auto& val = iter->second;                                                                           \
	auto& declRef = std::get<DeclType>(val.v);                                                          \
	declRef.fullname = key;                                                                             \
	return &declRef

DeclEnum* CodegenModel::AddEnum(std::string fullname, DeclEnum decl) {
#if CODEGEN_DEBUG_PRINT
	printf("Committed enum '%s'\n", decl.name.c_str());
	for (auto& elm : decl.elements) {
		printf("  - element %s = %" PRId64 "\n", elm.name.c_str(), elm.value);
	}
#endif

	STORE_DECL_OF_TYPE(DeclEnum, fullname, decl);
}

DeclStruct* CodegenModel::AddStruct(std::string fullname, DeclStruct decl) {
#if CODEGEN_DEBUG_PRINT
	printf("Committed struct '%s'\n", decl.name.c_str());
	printf("  Base classes:\n");
	for (auto& base : decl.baseClasses) {
		printf("  - %.*s\n", PRINTF_STRING_VIEW(base->name));
	}
#endif

	STORE_DECL_OF_TYPE(DeclStruct, fullname, decl);
}

#define FIND_DECL_OF_TYPE(DeclType)                     \
	auto iter = m->decls.find(name);                    \
	if (iter != m->decls.end()) {                       \
		auto& some = iter->second.v;                    \
		if (auto decl = std::get_if<DeclType>(&some)) { \
			return decl;                                \
		}                                               \
	}                                                   \
	return nullptr

const DeclEnum* CodegenModel::FindEnum(std::string_view name) const {
	FIND_DECL_OF_TYPE(DeclEnum);
}

const DeclStruct* CodegenModel::FindStruct(std::string_view name) const {
	FIND_DECL_OF_TYPE(DeclStruct);
}

DeclNamespace* CodegenModel::AddNamespace(DeclNamespace ns) {
	auto path = Utils::MakeFullName(""sv, &ns);
	auto [iter, success] = m->namespaces.try_emplace(std::move(path), std::move(ns));
	auto& nsRef = iter->second;
	if (success) {
		nsRef.fullname = iter->first;
	}
	return &nsRef;
}

const DeclNamespace* CodegenModel::FindNamespace(std::string_view fullname) const {
	auto iter = m->namespaces.find(fullname);
	if (iter != m->namespaces.end()) {
		return &iter->second;
	} else {
		return nullptr;
	}
}

DeclNamespace* CodegenModel::FindNamespace(std::string_view name) {
	return const_cast<DeclNamespace*>(const_cast<const CodegenModel*>(this)->FindNamespace(name));
}

CodegenModelArchive::CodegenModelArchive(std::string_view dbPath)
	: m{ new Private() } //
{
	std::string zstrPath(dbPath);
	int reuslt = sqlite3_open(zstrPath.c_str(), &m->database);
	if (reuslt != SQLITE_OK) {
		std::string msg;
		msg += "Failed to open SQLite3 database, error message:\n";
		msg += sqlite3_errmsg(m->database);
		throw std::runtime_error(msg);
	}

	// NOTE: These pragmas are not persistent, so we need to set them every time
	// As of SQLite3 3.38.5, it defaults to foreign_keys = OFF, so we need this to be on for ON DELETE CASCADE and etc. to work
	sqlite3_exec(m->database, "PRAGMA foreign_keys = ON", nullptr, nullptr, nullptr);
	// This database is used for a buildsystem and can be regenerated at any time. We don't care for the slightest about data integrity, we just want fast updates
	sqlite3_exec(m->database, "PRAGMA synchronous = OFF", nullptr, nullptr, nullptr);
	sqlite3_exec(m->database, "PRAGMA journal_mode = MEMORY", nullptr, nullptr, nullptr);

	{
		SQLiteStatement readVersionStmt;
		readVersionStmt.InitializeLazily(m->database, "PRAGMA user_version"sv);

		int result = sqlite3_step(readVersionStmt);
		assert(result == SQLITE_ROW);
		int currentDatabaseVersion = sqlite3_column_int(readVersionStmt, 0);

		result = sqlite3_step(readVersionStmt);
		assert(result == SQLITE_DONE);

		if (currentDatabaseVersion == 0) {
			// Newly created database, initialize it
			m->InitializeDatabase();
		} else if (currentDatabaseVersion == CURRENT_DATABASE_VERSION) {
			// Same version, no need to do anything
		} else {
			INPLACE_FMT(msg, "Incompatbile database versions %d (in file) vs %d (expected).", currentDatabaseVersion, CURRENT_DATABASE_VERSION);
			throw std::runtime_error(msg);
		}
	}

	// Initialize core statements
	m->beginTransactionStmt.Initialize(m->database, "BEGIN TRANSACTION");
	m->commitTransactionStmt.Initialize(m->database, "COMMIT TRANSACTION");
	m->rollbackTransactionStmt.Initialize(m->database, "ROLLBACK TRANSACTION");
	m->findFileStmt.Initialize(m->database, "SELECT Id FROM Files WHERE FileName = ?1");
	m->storeFileStmt.Initialize(m->database, "INSERT INTO Files(FileName) VALUES (?1) RETURNING Id");
	m->findNamespaceStmt.Initialize(m->database, "SELECT Id FROM Namespaces WHERE ParentNamespaceId = ?1 AND Name = ?2");
	m->getNamespaceStmt.Initialize(m->database, "SELECT * FROM Namespaces WHERE Id = ?1"sv);
	m->storeNamespaceStmt.Initialize(m->database, "INSERT INTO Namespaces(ParentNamespaceId, Name) VALUES (?1, ?2) RETURNING Id");
}

CodegenModelArchive::~CodegenModelArchive() {
	delete m;
}

void CodegenModelArchive::DeleteDeclsRelatedToFile(std::string_view filename) {
	// -Argument-	-Description-
	// ?1			The filename to delete
	m->deleteFunctionDeclByFilenameStmt.InitializeLazily(m->database, "DELETE FROM DeclFunctions WHERE FileId = (SELECT Id FROM Files WHERE FileName = ?1)"sv);
	m->deleteStructDeclByFilenameStmt.InitializeLazily(m->database, "DELETE FROM DeclStructs WHERE FileId = (SELECT Id FROM Files WHERE FileName = ?1);"sv);
	m->deleteEnumDeclByFilenameStmt.InitializeLazily(m->database, "DELETE FROM DeclEnums WHERE FileId = (SELECT Id FROM Files WHERE FileName = ?1);"sv);

	m->BeginTransaction();
	auto stmtList = {
		m->deleteFunctionDeclByFilenameStmt.stmt,
		m->deleteStructDeclByFilenameStmt.stmt,
		m->deleteEnumDeclByFilenameStmt.stmt,
	};
	for (auto& stmt : stmtList) {
		sqlite3_bind_text(stmt, 1, filename.data(), filename.size(), nullptr);
		int result = sqlite3_step(stmt);
		assert(result == SQLITE_DONE);
		sqlite3_reset(stmt);
		sqlite3_clear_bindings(stmt);
	}
	m->CommitTransaction();
}

void CodegenModelArchive::Store(const CodegenModel& cgModel) {
	auto& cgm = cgModel.GetPimpl();

	struct Visiter {
		CodegenModelArchive* self;

		void operator()(const DeclStruct& decl) const {
			self->StoreStruct(decl);
		}
		void operator()(const DeclFunction& decl) const {
			self->StoreFunction(decl);
		}
		void operator()(const DeclEnum& decl) const {
			self->StoreEnum(decl);
		}
	} visiter;
	visiter.self = this;

	m->BeginTransaction();

	// TODO why are some namepsaces not found in StoreStruct or StoreEnum calls, if we don't use FindOrStoreNamespace there?
	// since we store all currently scanned namespaces into the model here, does that mean the parser is not correctly picking some of those up?
	// but if the parser is failing, than the DeclThing objects should have a null `container` field?
	// [2022-07-15] I think this bug is fixed, it was caused by FindOrStoreNamespace() not calling sqlite3_reset(), causing a stmt execution state mixup between different namespaces
	for (auto&& [DISCARD, ns] : cgm.namespaces) {
		// This will insert the namespace if it doesn't exist, or no-op (fetches data) if it already exists
		m->FindOrStoreNamespace(&ns);
	}
	for (auto&& [DISCARD, value] : cgm.decls) {
		std::visit(visiter, value.v);
	}

	m->CommitTransaction();
}

void CodegenModelArchive::LoadInto(CodegenModel& model) const {
	// TODO
}

CodegenModel CodegenModelArchive::Load() const {
	CodegenModel cgModel;

	// TODO files
	// TODO namespaces

	robin_hood::unordered_map<int64_t, DeclStruct*> structsById;
	robin_hood::unordered_map<int64_t, DeclMemberVariable*> propertiesById;
	robin_hood::unordered_map<int64_t, DeclMemberFunction*> methodsById;

	// NOTE: this is basically { initializer; while(true) { body; } } in a short form
	// Load structs
	for (SQLiteStatement stmt(m->database, "SELECT * FROM DeclStructs"sv);;) {
		int result = sqlite3_step(stmt);
		if (result == SQLITE_DONE) {
			break;
		}

		if (result == SQLITE_ROW) {
			int64_t id = sqlite3_column_int64(stmt, 9);
			int64_t fileId = sqlite3_column_int64(stmt, 1);
			int64_t nsId = sqlite3_column_int64(stmt, 2);
			std::string_view name((const char*)sqlite3_column_text(stmt, 3));

			auto decl = cgModel.AddStruct(m->GetDeclFullName(nsId, name), DeclStruct{});
			structsById.try_emplace(id, decl);

			continue;
		}

		// Executing the statement resulted in an error
		assert(false);
	}
	// Load struct's base classes
	for (SQLiteStatement stmt(m->database, "SELECT * FROM DeclStructBaseClassRelations");;) {
		int result = sqlite3_step(stmt);
		if (result == SQLITE_DONE) {
			break;
		}

		if (result == SQLITE_ROW) {
			int64_t structId = sqlite3_column_int64(stmt, 0);
			int64_t parentStructNsId = sqlite3_column_int64(stmt, 1);
			std::string_view parentStructName((const char*)sqlite3_column_text(stmt, 2));

			auto declThis = structsById.at(structId);
			auto declParent = cgModel.FindStruct(parentStructName); // TODO namespace
			declThis->baseClasses.push_back(declParent);

			continue;
		}

		assert(false);
	}
	// Load struct properties
	for (SQLiteStatement stmt(m->database, "SELECT * FROM DeclStructProperties"sv);;) {
		int result = sqlite3_step(stmt);
		if (result == SQLITE_DONE) {
			break;
		}

		if (result == SQLITE_ROW) {
			// TODO
			continue;
		}

		assert(false);
	}
	// Load struct methods
	for (SQLiteStatement stmt(m->database, "SELECT * FROM DeclStructMethods"sv);;) {
		int result = sqlite3_step(stmt);
		if (result == SQLITE_DONE) {
			break;
		}

		if (result == SQLITE_ROW) {
			// TODO
			continue;
		}

		assert(false);
	}
	// Load method params
	for (SQLiteStatement stmt(m->database, "SELECT * FROM DeclStructMethodParameters"sv);;) {
		int result = sqlite3_step(stmt);
		if (result == SQLITE_DONE) {
			break;
		}

		if (result == SQLITE_ROW) {
			// TODO
			continue;
		}

		assert(false);
	}

	return cgModel;
}

void CodegenModelArchive::StoreStruct(const DeclStruct& decl) {
	// -Argument-	-Description-
	// ?1			Namespace ID
	// ?2			Struct name
	// ?3			File ID containing the struct
	// ?4			Is this struct marked for metadata generation?
	m->storeStructStmt.InitializeLazily(m->database, R"""(
INSERT INTO DeclStructs(NamespaceId, Name, FileId, IsMetadataMarked)
VALUES (?1, ?2, ?3, ?4)
ON CONFLICT DO UPDATE SET
	FileId = ?3,
	IsMetadataMarked = ?4
RETURNING Id
)"""sv);

	// -Argument-	-Description-
	// ?1			Struct ID
	// ?2			Parent struct's namespace ID
	// ?3			Parent struct's name
	m->storeStructBaseClassStmt.InitializeLazily(m->database, R"""(
INSERT INTO DeclStructBaseClassRelations(StructId, ParentStructNamespaceId, ParentStructName)
VALUES (?1, ?2, ?3)
)"""sv);

	// -Argument-	-Description-
	// ?1			Struct ID
	// ?2			Property name
	// ?3			Property type
	// ?4			Getter name (optional)
	// ?5			Setter name (optional)
	// ?6			Is this property marked for metadata generation?
	m->storeStructPropertyStmt.InitializeLazily(m->database, R"""(
INSERT INTO DeclStructProperties(StructId, Name, Type, GetterName, SetterName, IsMetadataMarked)
VALUES (?1, ?2, ?3, ?4, ?5, ?6)
)"""sv);

	int result;

	sqlite3_bind_int64(m->storeStructStmt, 1, m->FindOrStoreNamespace(decl.container));
	sqlite3_bind_text(m->storeStructStmt, 2, decl.name.c_str(), decl.name.size(), nullptr);
	sqlite3_bind_int64(m->storeStructStmt, 3, m->FindOrStoreFile(decl.sourceFile));
	sqlite3_bind_int(m->storeStructStmt, 4, decl.generating);
	result = sqlite3_step(m->storeStructStmt);
	assert(result == SQLITE_ROW);
	int64_t structId = sqlite3_column_int64(m->storeStructStmt, 0);
	sqlite3_reset(m->storeStructStmt);
	sqlite3_clear_bindings(m->storeStructStmt);

	for (auto& baseClass : decl.baseClasses) {
		sqlite3_bind_int64(m->storeStructBaseClassStmt, 1, structId);
		sqlite3_bind_int64(m->storeStructBaseClassStmt, 2, m->FindOrStoreNamespace(baseClass->container));
		sqlite3_bind_text(m->storeStructBaseClassStmt, 3, baseClass->name.c_str(), baseClass->name.size(), nullptr);
		int result = sqlite3_step(m->storeStructBaseClassStmt);
		assert(result == SQLITE_DONE);
		sqlite3_reset(m->storeStructBaseClassStmt);
		sqlite3_clear_bindings(m->storeStructBaseClassStmt);
	}

	for (auto& property : decl.memberVariables) {
		sqlite3_bind_int64(m->storeStructPropertyStmt, 1, structId);
		sqlite3_bind_text(m->storeStructPropertyStmt, 2, property.name.c_str(), property.name.size(), nullptr);
		sqlite3_bind_text(m->storeStructPropertyStmt, 3, property.type.c_str(), property.type.size(), nullptr);
		sqlite3_bind_text(m->storeStructPropertyStmt, 4, property.getterName.c_str(), property.getterName.size(), nullptr);
		sqlite3_bind_text(m->storeStructPropertyStmt, 5, property.setterName.c_str(), property.setterName.size(), nullptr);
		// Since DeclMemberVariable entries currently only exist if it's marked BRUSSEL_PROPERTY
		sqlite3_bind_int(m->storeStructPropertyStmt, 6, true);
		int result = sqlite3_step(m->storeStructPropertyStmt);
		assert(result == SQLITE_DONE);
		sqlite3_reset(m->storeStructPropertyStmt);
		sqlite3_clear_bindings(m->storeStructPropertyStmt);
	}

	for (auto& method : decl.memberFunctions) {
		// TODO
	}
}

void CodegenModelArchive::StoreFunction(const DeclFunction& decl) {
	// TODO
}

void CodegenModelArchive::StoreEnum(const DeclEnum& decl) {
	// -Argument-	-Description-
	// ?1			Namespace ID
	// ?2			Enum name
	// ?3			Enum underlying type
	// ?4			File ID containing the enum
	m->storeEnumStmt.InitializeLazily(m->database, R"""(
INSERT INTO DeclEnums(NamespaceId, Name, UnderlyingType, FileId)
VALUES (?1, ?2, ?3, ?4)
ON CONFLICT DO UPDATE SET
	UnderlyingType = ?3,
	FileId = ?4
RETURNING Id
)"""sv);

	// -Argument-	-Description-
	// ?1			Container enum's id
	// ?2			Enum element name
	// ?3			Enum element value
	m->storeEnumElmStmt.InitializeLazily(m->database, R"""(
INSERT INTO DeclEnumElements(EnumId, Name, Value)
VALUES (?1, ?2, ?3)
ON CONFLICT DO UPDATE SET Value=?3
)"""sv);

	sqlite3_bind_int(m->storeEnumStmt, 1, m->FindOrStoreNamespace(decl.container));
	sqlite3_bind_text(m->storeEnumStmt, 2, decl.name.c_str(), decl.name.size(), nullptr);
	auto eutName = decl.GetUnderlyingTypeName();
	sqlite3_bind_text(m->storeEnumStmt, 3, eutName.data(), eutName.size(), nullptr);
	sqlite3_bind_int64(m->storeEnumStmt, 4, m->FindOrStoreFile(decl.sourceFile));
	int result = sqlite3_step(m->storeEnumStmt);
	assert(result == SQLITE_ROW);
	auto enumId = sqlite3_column_int64(m->storeEnumStmt, 0);
	sqlite3_reset(m->storeEnumStmt);
	sqlite3_clear_bindings(m->storeEnumStmt);

	for (auto& elm : decl.elements) {
		sqlite3_bind_int64(m->storeEnumElmStmt, 1, enumId);
		sqlite3_bind_text(m->storeEnumElmStmt, 2, elm.name.c_str(), elm.name.size(), nullptr);
		sqlite3_bind_int64(m->storeEnumElmStmt, 3, elm.value);
		int result = sqlite3_step(m->storeEnumElmStmt);
		assert(result == SQLITE_DONE);
		sqlite3_reset(m->storeEnumElmStmt);
		sqlite3_clear_bindings(m->storeEnumElmStmt);
	}
}