Sri Lanka still hasn't seen the number of visiting tourists return to pre-Covid levels

Sri Lanka is, in the words of its own president, "bankrupt".

The Indian Ocean nation defaulted on its sovereign debt in May 2022, plunging the country into economic and political chaos.

The Colombo government secured a $2.9bn (£2.4bn) International Monetary Fund bailout in principle the following September.

But the cash will not be released to Sri Lanka until its sovereign creditors in China and India first agree to a restructuring of the billions of dollars of bilateral debt they are owed.

Despite optimism over the past month that such an agreement was imminent, a deal has still not materialised - and Sri Lanka's economic agony, and the suffering of its population, continues.

Yet, even if the bailout cash does start to flow in the coming weeks or months, that will not mark the end of Sri Lanka's economic rebuilding programme, but merely the beginning.

For it's widely accepted that Sri Lanka's economic model needs a fundamental overhaul.

In the years following the savage end of the government's 25-year war against the separatist Tamil Tigers in 2009, Sri Lanka benefited from something of a financial "peace dividend".

The government at the time successfully attracted large flows of foreign investment, not only from foreign governments like China, but also private international bondholders.

These financial flows pumped up domestic economic growth, but at the cost of ballooning imbalances.

The domestic economy grew steadily less internationally competitive in these years. And while exports continued to rise from 2000 to 2018, from $6.5bn to $19.4bn, over the same time period they slumped as a share of the economy, from 39% to 23%.

Even before the pandemic hit in 2020, tearing the heart out of the island's lucrative tourism industry, the Sri Lankan trade deficit - the gap between its imports and exports - was already running at more than 6% of GDP.

That imbalance is one of the reasons the default hit Sri Lanka so hard - it suddenly found itself without the means to generate the foreign currency needed to import vital supplies of food and fuel.

Ranil Wickremesinghe, who took over the presidency after the discredited and reviled Gotabaya Rajapaksa fled the country in July 2022, has been clear that Sri Lanka's road to recovery will have to involve addressing the imbalance at source, and, in particular, driving up exports.

"We have to transform into a highly competitive export-oriented economy," he told local business leaders last year.

"There is no other way out. We are a country with 22 million people. We have to find markets outside."

So the big economic question looming over Sri Lanka is: can this be done? Can the country trade its way back to prosperity?

Traditionally, Sri Lanka's big exports have been agricultural, starting with cinnamon, which attracted European colonisers in the 16th Century. Today tea is still the biggest export commodity.

But the tea sector is still reeling from a disastrous 2021 ban on imports of fertiliser by the previous government, which cut yields by a fifth.

Looking to the future, increasing agricultural productivity is an obvious avenue for policymakers to explore.

Yet many firms in the tea sector style themselves as "artisan" producers, with leaves still plucked by hand as they were two centuries ago when the plantations were started by the British Empire. And many estates are still using archaic processing equipment.

On top of this, Roshan Rajadurai, the general manager of the Pedro estate in Nuwara Eliya, says that its workers are resistant to new, more efficient methods of picking.

He wants to move to a model in which pickers and their families are given individual sections of plantation to harvest themselves - with them setting their own hours - rather than working in large traditional work teams for fixed daily hours.

It's a reform Mr Rajadurai says has been proven to increase yields where it has been adopted, but he says the pickers are resisting.

"If we don't do it I think with the rising cost, and the static prices that we get in the world markets for our product, I don't think we can be sustainable in the long term," he warns.

Textiles - manufacturing garments for Western brands - are another major source of exports for Sri Lanka.

But this, even more than tea, relies heavily on imported raw materials and fuel, which have shot up in price in the wake of the pandemic and the Russian invasion of Ukraine.

Those prices should come down this year, yet the reality is that tea and textiles, though they will probably always be important, are unlikely to push Sri Lanka very far up the global export value chain.

So what else could Sri Lanka export?

What's striking is that speaking to policymakers and analysts in Sri Lanka, as Newsnight did in January, is that there is very little sense of a grand plan.

Unlike other Asian nations such as Malaysia or Vietnam, which saw a major state-led push into electronic manufacturing, there's no strong sense that one hears of a particular sector where the country can and should gain an advantage.

The closest area to a prospective national champion is probably port services.

The governor of the county's central bank, Nandalal Weerasinghe, says Sri Lanka's geographical location, in the centre of Indian Ocean shipping lanes, offers an opportunity to be a major "trans-shipment" hub.

"Ports and logistics are where there is the potential for us to promote exports," he says.

It is estimated that a third of the world's bulk cargo, and two-thirds of its oil, is transported across the Indian Ocean.

But perhaps the absence of a clear national plan doesn't matter as much as getting the economic policymaking basics right.

In the grip of the crisis last year, the government removed a peg on the currency, which resulted in a halving of the value of the rupee against the US dollar. Some think keeping a floating exchange rate will ultimately help boost exports.

"[In the past] we didn't allow it to depreciate or to adjust according to market forces, which has basically discouraged exports," says Roshan Perera of the Advocata think tank, and a former central bank director.

Another area for reform identified by the World Bank is, ironically, liberalising imports and dismantling tariffs. These duties make many imported goods and products more expensive, thereby benefiting domestic producers, such as those in the retail and construction sectors.

Sri Lanka is reckoned to be one of the most protected economies in the world in terms of import duties on consumer goods.

The argument is that liberalisation could attract more foreign investment, which will help the country's industries become more efficient and export more.

The question is whether, despite the change of president last year, there is enough political space for Mr Wickremesinghe to dismantle trade barriers, which will inevitably attract opposition from powerful local vested interests.

The optimistic case is that the shock of the last year will provide an impetus for such painful reforms, and give Sri Lanka at least a fighting chance of trading its way out of its worst ever economic crisis.