package documenttext

import (
	"context"
	"errors"
	"time"

	"queryorchestration/internal/database/repository"
	"queryorchestration/internal/serviceconfig/build"
	"queryorchestration/internal/serviceconfig/objectstore"

	"github.com/aws/aws-sdk-go-v2/service/textract"
	"github.com/aws/aws-sdk-go-v2/service/textract/types"
	"github.com/google/uuid"
)

func (s *Service) triggerExtract(ctx context.Context, clean *repository.Currentcleanentry) error {
	version := build.GetVersionUnixTimestamp()

	return s.cfg.ExecuteDBTransaction(ctx, func(ctx context.Context, q *repository.Queries) error {
		triggerId, err := s.cfg.GetDBQueries().AddDocumentTextTrigger(ctx, &repository.AddDocumentTextTriggerParams{
			Cleanid: clean.ID,
			Version: version,
		})
		if err != nil {
			return err
		}

		jobTag := triggerId.String()

		filename, err := s.getOutputFilename(triggerId)
		if err != nil {
			return err
		}

		key := objectstore.BucketKey{
			CreatedAt: time.Now().UTC(),
			Location:  objectstore.TextTextract,
			ClientID:  clean.Clientid,
			Filename:  filename,
		}
		keyStr := key.String()

		res, err := s.cfg.GetTextractClient().StartDocumentTextDetection(ctx, &textract.StartDocumentTextDetectionInput{
			DocumentLocation: &types.DocumentLocation{
				S3Object: &types.S3Object{
					Bucket: clean.Bucket,
					Name:   clean.Key,
				},
			},
			JobTag: &jobTag,
			OutputConfig: &types.OutputConfig{
				S3Bucket: clean.Bucket,
				S3Prefix: &keyStr,
			},
		})
		if err != nil {
			return err
		} else if res.JobId == nil {
			return errors.New("No job id returned from textract")
		}

		err = s.cfg.GetDBQueries().AddDocumentTextTriggerJobId(ctx, &repository.AddDocumentTextTriggerJobIdParams{
			ID:            triggerId,
			Textractjobid: res.JobId,
		})
		if err != nil {
			return err
		}

		return nil
	})
}

func (s *Service) getOutputFilename(triggerId uuid.UUID) (string, error) {
	if triggerId == uuid.Nil {
		return "", errors.New("trigger id required")
	}

	return triggerId.String(), nil
}

func (s *Service) getTriggerIdFromKey(key objectstore.BucketKey) (uuid.UUID, error) {
	triggerId, err := uuid.Parse(key.Filename)
	if err != nil {
		return uuid.Nil, err
	}

	return triggerId, nil
}