package grpc

import (
	"context"

	hav1 "gitea.nik4nao.com/nik/home-services/gen/ha/v1"
	"gitea.nik4nao.com/nik/home-services/ha-gateway/internal/core/domain"
	"gitea.nik4nao.com/nik/home-services/ha-gateway/internal/core/ports/driving"
)

type LightGRPC struct {
	hav1.UnimplementedLightServiceServer
	svc driving.LightService
}

// NewLightGRPC constructs the gRPC adapter for LightService.
func NewLightGRPC(svc driving.LightService) *LightGRPC {
	return &LightGRPC{svc: svc}
}

// TurnOn maps a protobuf turn-on request into domain parameters.
func (h *LightGRPC) TurnOn(ctx context.Context, req *hav1.TurnOnRequest) (*hav1.LightResponse, error) {
	s, err := h.svc.TurnOn(ctx, protoTurnOnToParams(req))
	if err != nil {
		return nil, grpcError(err)
	}
	return &hav1.LightResponse{State: domainStateToProto(s)}, nil
}

// TurnOff maps a protobuf turn-off request into domain parameters.
func (h *LightGRPC) TurnOff(ctx context.Context, req *hav1.TurnOffRequest) (*hav1.LightResponse, error) {
	s, err := h.svc.TurnOff(ctx, protoTurnOffToParams(req))
	if err != nil {
		return nil, grpcError(err)
	}
	return &hav1.LightResponse{State: domainStateToProto(s)}, nil
}

// Toggle forwards a light toggle request to the domain service.
func (h *LightGRPC) Toggle(ctx context.Context, req *hav1.ToggleRequest) (*hav1.LightResponse, error) {
	s, err := h.svc.Toggle(ctx, domain.EntityID(req.EntityId))
	if err != nil {
		return nil, grpcError(err)
	}
	return &hav1.LightResponse{State: domainStateToProto(s)}, nil
}

// ListLights returns discovery-oriented light metadata for clients such as Discord.
func (h *LightGRPC) ListLights(ctx context.Context, req *hav1.ListLightsRequest) (*hav1.ListLightsResponse, error) {
	lights, err := h.svc.ListLights(ctx)
	if err != nil {
		return nil, grpcError(err)
	}
	out := make([]*hav1.LightEntity, 0, len(lights))
	for _, l := range lights {
		out = append(out, domainLightToProto(l))
	}
	return &hav1.ListLightsResponse{Lights: out}, nil
}