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 ClimateGRPC struct {
	hav1.UnimplementedClimateServiceServer
	svc driving.ClimateService
}

// NewClimateGRPC constructs the gRPC adapter for ClimateService.
func NewClimateGRPC(svc driving.ClimateService) *ClimateGRPC {
	return &ClimateGRPC{svc: svc}
}

// ListClimates returns discovery-oriented climate metadata for clients.
func (h *ClimateGRPC) ListClimates(ctx context.Context, req *hav1.ListClimatesRequest) (*hav1.ListClimatesResponse, error) {
	climates, err := h.svc.ListClimates(ctx)
	if err != nil {
		return nil, grpcError(err)
	}
	out := make([]*hav1.ClimateEntity, 0, len(climates))
	for _, c := range climates {
		out = append(out, domainClimateToProto(c))
	}
	return &hav1.ListClimatesResponse{Climates: out}, nil
}

// TurnOn maps a protobuf turn-on request into a domain entity ID.
func (h *ClimateGRPC) TurnOn(ctx context.Context, req *hav1.ClimateRequest) (*hav1.ClimateResponse, error) {
	s, err := h.svc.TurnOn(ctx, domain.EntityID(req.EntityId))
	if err != nil {
		return nil, grpcError(err)
	}
	return &hav1.ClimateResponse{State: domainStateToProto(s)}, nil
}

// TurnOff maps a protobuf turn-off request into a domain entity ID.
func (h *ClimateGRPC) TurnOff(ctx context.Context, req *hav1.ClimateRequest) (*hav1.ClimateResponse, error) {
	s, err := h.svc.TurnOff(ctx, domain.EntityID(req.EntityId))
	if err != nil {
		return nil, grpcError(err)
	}
	return &hav1.ClimateResponse{State: domainStateToProto(s)}, nil
}

// IncreaseTemperature forwards a temperature step-up request to the domain service.
func (h *ClimateGRPC) IncreaseTemperature(ctx context.Context, req *hav1.ClimateRequest) (*hav1.ClimateResponse, error) {
	s, err := h.svc.IncreaseTemperature(ctx, domain.EntityID(req.EntityId))
	if err != nil {
		return nil, grpcError(err)
	}
	return &hav1.ClimateResponse{State: domainStateToProto(s)}, nil
}

// DecreaseTemperature forwards a temperature step-down request to the domain service.
func (h *ClimateGRPC) DecreaseTemperature(ctx context.Context, req *hav1.ClimateRequest) (*hav1.ClimateResponse, error) {
	s, err := h.svc.DecreaseTemperature(ctx, domain.EntityID(req.EntityId))
	if err != nil {
		return nil, grpcError(err)
	}
	return &hav1.ClimateResponse{State: domainStateToProto(s)}, nil
}

// SetTemperature forwards an absolute target-temperature request to the domain service.
func (h *ClimateGRPC) SetTemperature(ctx context.Context, req *hav1.SetTemperatureRequest) (*hav1.ClimateResponse, error) {
	s, err := h.svc.SetTemperature(ctx, domain.EntityID(req.EntityId), req.TargetTemperature)
	if err != nil {
		return nil, grpcError(err)
	}
	return &hav1.ClimateResponse{State: domainStateToProto(s)}, nil
}

// SetHVACMode forwards an HVAC mode change request to the domain service.
func (h *ClimateGRPC) SetHVACMode(ctx context.Context, req *hav1.SetHVACModeRequest) (*hav1.ClimateResponse, error) {
	s, err := h.svc.SetHVACMode(ctx, domain.EntityID(req.EntityId), req.HvacMode)
	if err != nil {
		return nil, grpcError(err)
	}
	return &hav1.ClimateResponse{State: domainStateToProto(s)}, nil
}