package main

import (
	"database/sql"
	"fmt"
	"log"

	_ "github.com/jackc/pgx/v5/stdlib"
)

func main() {
	// Using the correct port 55432 found in .env
	connStr := "postgres://postgres:123@localhost:55432/saveinmed?sslmode=disable"

	log.Printf("Connecting to DB at %s...", connStr)
	db, err := sql.Open("pgx", connStr)
	if err != nil {
		log.Fatalf("Failed to open DB: %v", err)
	}
	defer db.Close()

	if err := db.Ping(); err != nil {
		log.Fatalf("Failed to ping DB: %v", err)
	}
	log.Println("Connected successfully!")

	id := "019be7a2-7727-7536-bee6-1ef05b464f3d"
	fmt.Printf("Checking Product ID: %s\n", id)

	var count int
	err = db.QueryRow("SELECT count(*) FROM products WHERE id = $1", id).Scan(&count)
	if err != nil {
		log.Printf("Query count failed: %v", err)
	}
	fmt.Printf("Count: %d\n", count)

	if count > 0 {
		var name string
		var batch sql.NullString
		// Check columns that might cause scan errors if null
		// Also check stock and expires_at
		var stock sql.NullInt64
		var expiresAt sql.NullTime

		err = db.QueryRow("SELECT name, batch, stock, expires_at FROM products WHERE id = $1", id).Scan(&name, &batch, &stock, &expiresAt)
		if err != nil {
			log.Printf("Select details failed: %v", err)
		} else {
			fmt.Printf("Found: Name=%s\n", name)
			fmt.Printf("Batch: Valid=%v, String=%v\n", batch.Valid, batch.String)
			fmt.Printf("Stock: Valid=%v, Int64=%v\n", stock.Valid, stock.Int64)
			fmt.Printf("ExpiresAt: Valid=%v, Time=%v\n", expiresAt.Valid, expiresAt.Time)
		}
	} else {
		fmt.Println("Product NOT FOUND in DB. Listing random 5 products:")
		rows, err := db.Query("SELECT id, name FROM products LIMIT 5")
		if err != nil {
			log.Fatal(err)
		}
		defer rows.Close()
		for rows.Next() {
			var pid, pname string
			rows.Scan(&pid, &pname)
			fmt.Printf("- %s: %s\n", pid, pname)
		}
	}
}