package db

import (
	"context"
	"fmt"
	"log"

	"git.keircn.com/keiran/termcloud/internal/config"
	"github.com/jackc/pgx/v5/pgxpool"
)

func NewPool(ctx context.Context, cfg *config.Config) (*pgxpool.Pool, error) {
	if cfg.DatabaseURL == "" {
		return nil, fmt.Errorf("DATABASE_URL environment variable is not set")
	}

	config, err := pgxpool.ParseConfig(cfg.DatabaseURL)
	if err != nil {
		return nil, fmt.Errorf("unable to parse DATABASE_URL: %w", err)
	}

	config.MaxConns = cfg.MaxConnections
	config.MinConns = cfg.MinConnections
	config.MaxConnLifetime = cfg.ConnLifetime
	config.MaxConnIdleTime = cfg.ConnIdleTime
	config.HealthCheckPeriod = cfg.HealthCheckPeriod

	pool, err := pgxpool.NewWithConfig(ctx, config)
	if err != nil {
		return nil, fmt.Errorf("unable to create connection pool: %w", err)
	}

	err = pool.Ping(ctx)
	if err != nil {
		pool.Close()
		return nil, fmt.Errorf("unable to ping database: %w", err)
	}

	log.Println("Database connection pool successfully initialized.")
	return pool, nil
}

func ClosePool(pool *pgxpool.Pool) {
	if pool != nil {
		pool.Close()
		log.Println("Database connection pool closed.")
	}
}