package registry

import (
	"context"
	"database/sql"

	"reanimator/internal/domain"
)

type LocationRepository struct {
	db *sql.DB
}

func NewLocationRepository(db *sql.DB) *LocationRepository {
	return &LocationRepository{db: db}
}

func (r *LocationRepository) Create(ctx context.Context, customerID int64, name string, kind *string) (domain.Location, error) {
	result, err := r.db.ExecContext(ctx,
		`INSERT INTO locations (customer_id, name, kind) VALUES (?, ?, ?)`,
		customerID, name, kind,
	)
	if err != nil {
		return domain.Location{}, classifyError(err)
	}

	id, err := result.LastInsertId()
	if err != nil {
		return domain.Location{}, err
	}

	return r.Get(ctx, id)
}

func (r *LocationRepository) Get(ctx context.Context, id int64) (domain.Location, error) {
	var location domain.Location
	var kind sql.NullString

	row := r.db.QueryRowContext(ctx,
		`SELECT id, customer_id, name, kind, created_at, updated_at FROM locations WHERE id = ?`,
		id,
	)
	if err := row.Scan(&location.ID, &location.CustomerID, &location.Name, &kind, &location.CreatedAt, &location.UpdatedAt); err != nil {
		if err == sql.ErrNoRows {
			return domain.Location{}, ErrNotFound
		}
		return domain.Location{}, err
	}

	location.Kind = nullStringToPtr(kind)
	return location, nil
}

func (r *LocationRepository) List(ctx context.Context) ([]domain.Location, error) {
	rows, err := r.db.QueryContext(ctx,
		`SELECT id, customer_id, name, kind, created_at, updated_at FROM locations ORDER BY id`,
	)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	locations := make([]domain.Location, 0)
	for rows.Next() {
		var location domain.Location
		var kind sql.NullString

		if err := rows.Scan(&location.ID, &location.CustomerID, &location.Name, &kind, &location.CreatedAt, &location.UpdatedAt); err != nil {
			return nil, err
		}
		location.Kind = nullStringToPtr(kind)
		locations = append(locations, location)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}

	return locations, nil
}