package docsyncrunner

import (
	"context"
	"log/slog"

	"queryorchestration/internal/database/repository"
	"queryorchestration/internal/document/batch/foldercleanup"
	"queryorchestration/internal/document/batch/outcome"
	documentsync "queryorchestration/internal/document/sync"

	"github.com/google/uuid"
)

const Name = "docSyncRunner"

// Services holds the dependencies for the docSyncRunner.
//
// Fields:
//   - Document: service for syncing documents
//   - Outcome: reporter for writing batch pipeline outcomes
type Services struct {
	Document *documentsync.Service
	Outcome  *outcome.Reporter
	Cleanup  *foldercleanup.Service
}

// Runner processes document sync messages from the SQS queue.
type Runner struct {
	svc *Services
}

// New creates a new docSyncRunner.
//
// Parameters:
//   - svc: the runner's service dependencies
//
// Returns:
//   - Runner: the runner instance
func New(svc *Services) Runner {
	return Runner{
		svc: svc,
	}
}

// Body is the SQS message body for docSyncRunner.
type Body struct {
	DocumentID uuid.UUID `json:"id" validate:"required,uuid"`
}

// Process handles a single document sync message. Returns true to acknowledge
// the message (success), or false to requeue (infrastructure error).
func (s Runner) Process(ctx context.Context, body Body) bool {
	result, err := s.svc.Document.Sync(ctx, body.DocumentID)
	if err != nil {
		slog.Error("unable to process", "error", err)
		return false
	}

	outcomeName := repository.BatchOutcomeStatusSyncComplete
	if result.Skipped {
		outcomeName = repository.BatchOutcomeStatusSyncSkipped
	}
	batchIDs, updateErr := s.svc.Outcome.Update(ctx, body.DocumentID, outcomeName, nil)
	if updateErr != nil {
		slog.Error("failed to update batch outcome",
			"document_id", body.DocumentID, "outcome", outcomeName, "error", updateErr)
	}
	if outcomeName == repository.BatchOutcomeStatusSyncSkipped && s.svc.Cleanup != nil {
		for _, batchID := range batchIDs {
			if _, err := s.svc.Cleanup.TryFinalizeBatch(ctx, batchID); err != nil {
				slog.Error("failed to finalize batch folder cleanup", "batch_id", batchID, "error", err)
			}
		}
	}

	return true
}