package database

import (
	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/log"
	"github.com/jmoiron/sqlx"
)

// Simple middleware that provides a transaction as a local key "db"
func DbMiddleware(db *sqlx.DB) func(c *fiber.Ctx) error {
	return func(c *fiber.Ctx) error {
		tx := db.MustBegin()

		defer func() {
			if err := tx.Commit(); err != nil {
				if err = tx.Rollback(); err != nil {
					log.Error("Failed to rollback transaction: ", err)
				}
				return
			}
		}()

		var db_iface Database = &Db{tx}

		c.Locals("db", &db_iface)
		return c.Next()
	}
}

// Helper function to get the database from the context, without fiddling with casts
func GetDb(c *fiber.Ctx) Database {
	// Dereference a pointer to a local, casted to a pointer to a Database
	return *c.Locals("db").(*Database)
}