package database

import (
	"context"
	"fmt"
	"log/slog"

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

	"marktvogt.de/backend/internal/config"
)

func NewPostgres(ctx context.Context, cfg config.DBConfig) (*pgxpool.Pool, error) {
	poolCfg, err := pgxpool.ParseConfig(cfg.DSN())
	if err != nil {
		return nil, fmt.Errorf("parsing postgres config: %w", err)
	}

	poolCfg.MaxConns = int32(cfg.MaxConns)
	poolCfg.MinConns = int32(cfg.MinConns)

	pool, err := pgxpool.NewWithConfig(ctx, poolCfg)
	if err != nil {
		return nil, fmt.Errorf("creating postgres pool: %w", err)
	}

	if err := pool.Ping(ctx); err != nil {
		pool.Close()
		return nil, fmt.Errorf("pinging postgres: %w", err)
	}

	slog.Info("connected to postgres", "host", cfg.Host, "port", cfg.Port, "db", cfg.Name)
	return pool, nil
}