package grpc

import (
	"bytes"
	"context"
	"log/slog"
	"time"

	"git.dubyatp.xyz/dubyatp/scannerbot/server/api"
	pb "git.dubyatp.xyz/dubyatp/scannerbot/server/proto"
	"github.com/google/uuid"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
)

type MessageServer struct {
	pb.UnimplementedMessageServiceServer
}

func (s *MessageServer) SendMessage(ctx context.Context, req *pb.SendMessageRequest) (*pb.SendMessageResponse, error) {
	slog.Debug("grpc: entering SendMessage handler")

	channelID, err := uuid.Parse(req.ChannelId)
	if err != nil {
		slog.Error("grpc: invalid channel_id", "error", err)
		return nil, status.Errorf(codes.InvalidArgument, "invalid channel_id: %v", err)
	}

	channel, err := api.DBGetChannel(channelID.String())
	if err != nil {
		slog.Error("grpc: channel not found", "channelid", channelID, "error", err)
		return nil, status.Errorf(codes.NotFound, "channel not found")
	}

	filename := req.AudioFilename
	if filename == "" {
		filename = channelID.String() + ".wav"
	}

	audio, err := api.Store.Save(filename, bytes.NewReader(req.Audio))
	if err != nil {
		slog.Error("grpc: failed to save audio file", "error", err)
		return nil, status.Errorf(codes.Internal, "failed to save audio file")
	}

	if err := api.DBAddFile(audio); err != nil {
		slog.Error("grpc: failed to persist audio file record", "error", err)
		return nil, status.Errorf(codes.Internal, "failed to persist audio file")
	}

	msg := &api.Message{
		ID:      uuid.New(),
		Channel: *channel,
		Created: time.Now(),
		Content: req.Content,
		Audio:   *audio,
	}

	if err := api.DBAddMessage(msg); err != nil {
		slog.Error("grpc: failed to persist message", "error", err)
		return nil, status.Errorf(codes.Internal, "failed to persist message")
	}

	slog.Debug("grpc: message saved", "messageid", msg.ID, "channelid", channelID)
	return &pb.SendMessageResponse{
		Id:        msg.ID.String(),
		ChannelId: channel.ID.String(),
		Created:   msg.Created.Format(time.RFC3339),
		Content:   msg.Content,
		AudioId:   audio.ID.String(),
	}, nil
}