langsupport

type ExecutionPlan interface {
	FnDefinition() wasm.FunctionDefinition
	FnMetadata() *metadata.Function
	ParamHandlers() []TypeHandler
	ResultHandlers() []TypeHandler
	UseResultIndirection() bool
	HasDefaultParameters() bool
	InvokeFunction(ctx context.Context, wa WasmAdapter, parameters map[string]any) (result any, err error)
}

type Language interface {
	Name() string
	TypeInfo() LanguageTypeInfo
	NewPlanner(md *metadata.Metadata) Planner
	NewWasmAdapter(mod wasm.Module) WasmAdapter
}

type LanguageTypeInfo interface {
	GetReflectedType(ctx context.Context, typ string) (reflect.Type, error)
	GetSizeOfType(ctx context.Context, typ string) (uint32, error)
	GetAlignmentOfType(ctx context.Context, typ string) (uint32, error)
	GetDataSizeOfType(ctx context.Context, typ string) (uint32, error)
	GetEncodingLengthOfType(ctx context.Context, typ string) (uint32, error)
	ObjectsUseMaxFieldAlignment() bool

	GetListSubtype(typ string) string
	GetMapSubtypes(typ string) (string, string)
	GetNameForType(typ string) string
	GetUnderlyingType(typ string) string

	IsBooleanType(typ string) bool
	IsByteSequenceType(typ string) bool
	IsFloatType(typ string) bool
	IsIntegerType(typ string) bool
	IsListType(typ string) bool
	IsMapType(typ string) bool
	IsObjectType(typ string) bool
	IsNullableType(typ string) bool
	IsPointerType(typ string) bool
	IsPrimitiveType(typ string) bool
	IsSignedIntegerType(typ string) bool
	IsStringType(typ string) bool
	IsTimestampType(typ string) bool
}

type Planner interface {
	GetPlan(ctx context.Context, fnMeta *metadata.Function, fnDef wasm.FunctionDefinition) (ExecutionPlan, error)
	GetHandler(ctx context.Context, typ string) (TypeHandler, error)
	AllHandlers() map[string]TypeHandler
}

type TypeHandler interface {
	TypeInfo() TypeInfo
	Read(ctx context.Context, wa WasmAdapter, offset uint32) (any, error)
	Write(ctx context.Context, wa WasmAdapter, offset uint32, obj any) (utils.Cleaner, error)
	Decode(ctx context.Context, wa WasmAdapter, vals []uint64) (any, error)
	Encode(ctx context.Context, wa WasmAdapter, obj any) ([]uint64, utils.Cleaner, error)
}

type TypeInfo interface {
	Name() string
	ReflectedType() reflect.Type
	ZeroValue() any
	Size() uint32
	Alignment() uint32
	DataSize() uint32
	EncodingLength() uint32

	UnderlyingType() TypeInfo
	ListElementType() TypeInfo
	MapKeyType() TypeInfo
	MapValueType() TypeInfo
	ObjectFieldTypes() []TypeInfo
	ObjectFieldOffsets() []uint32

	IsBoolean() bool
	IsByteSequence() bool
	IsFloat() bool
	IsInteger() bool
	IsList() bool
	IsMap() bool
	IsNullable() bool
	IsObject() bool
	IsPointer() bool
	IsPrimitive() bool
	IsSignedInteger() bool
	IsString() bool
	IsTimestamp() bool
}

type WasmAdapter interface {
	TypeInfo() LanguageTypeInfo
	Memory() wasm.Memory
	AllocateMemory(ctx context.Context, size uint32) (uint32, utils.Cleaner, error)
	GetFunction(name string) wasm.Function
	PreInvoke(ctx context.Context, plan ExecutionPlan) error
}