// Package store wraps database access (pgxpool) for the backend.
package store

import (
	"context"
	"fmt"

	"github.com/jackc/pgx/v5/pgxpool"

	"github.com/mitbringsl/backend/internal/config"
)

// New creates and configures a pgx connection pool, then pings the DB to verify access.
func New(ctx context.Context, cfg *config.Config) (*pgxpool.Pool, error) {
	pcfg, err := pgxpool.ParseConfig(cfg.DatabaseURL)
	if err != nil {
		return nil, fmt.Errorf("parse database url: %w", err)
	}
	pcfg.MaxConns = cfg.DBMaxOpenConns
	pcfg.MinConns = cfg.DBMaxIdleConns
	pcfg.MaxConnLifetime = cfg.DBMaxLifetime

	pool, err := pgxpool.NewWithConfig(ctx, pcfg)
	if err != nil {
		return nil, fmt.Errorf("create pool: %w", err)
	}
	if err := pool.Ping(ctx); err != nil {
		pool.Close()
		return nil, fmt.Errorf("ping db: %w", err)
	}
	return pool, nil
}