package store

import (
	"context"
	"fmt"
	"time"
)

// Submission ist ein eingereichter Beitrag.
type Submission struct {
	ID        string
	Platform  string
	PostType  string
	Caption   string
	Status    string
	CreatedAt time.Time
	UpdatedAt time.Time
}

// CreateSubmission legt einen neuen Beitrag an (Status "draft").
func (s *Store) CreateSubmission(ctx context.Context, platform, postType, caption string) (Submission, error) {
	var sub Submission
	err := s.Pool.QueryRow(ctx, `
		INSERT INTO submission (platform, post_type, caption)
		VALUES ($1, $2, $3)
		RETURNING id, platform, post_type, caption, status, created_at, updated_at
	`, platform, postType, caption).Scan(
		&sub.ID, &sub.Platform, &sub.PostType, &sub.Caption, &sub.Status, &sub.CreatedAt, &sub.UpdatedAt,
	)
	if err != nil {
		return Submission{}, fmt.Errorf("store: create submission: %w", err)
	}
	return sub, nil
}

// GetSubmission liest einen Beitrag anhand seiner ID.
func (s *Store) GetSubmission(ctx context.Context, id string) (Submission, error) {
	var sub Submission
	err := s.Pool.QueryRow(ctx, `
		SELECT id, platform, post_type, caption, status, created_at, updated_at
		FROM submission WHERE id = $1
	`, id).Scan(
		&sub.ID, &sub.Platform, &sub.PostType, &sub.Caption, &sub.Status, &sub.CreatedAt, &sub.UpdatedAt,
	)
	if err != nil {
		return Submission{}, fmt.Errorf("store: get submission: %w", err)
	}
	return sub, nil
}

// SetSubmissionStatus setzt den Status eines Beitrags (submission ist,
// anders als extraction/finding/evidence_package, NICHT append-only —
// der Lebenszyklus draft → checked → published → archived ist eine
// normale Zustandsänderung, kein Beweis-Eintrag).
func (s *Store) SetSubmissionStatus(ctx context.Context, id, status string) error {
	tag, err := s.Pool.Exec(ctx, `
		UPDATE submission SET status = $2, updated_at = now() WHERE id = $1
	`, id, status)
	if err != nil {
		return fmt.Errorf("store: set submission status: %w", err)
	}
	if tag.RowsAffected() == 0 {
		return fmt.Errorf("store: set submission status: submission %s nicht gefunden", id)
	}
	return nil
}