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import { Contract } from '../model/contract.ts';
import { Ship } from '../model/ship.ts';
import * as mining from './mining.js';
import * as selling from './selling.js';
import * as dbContracts from '../database/contracts.ts';
import * as dbShips from '../database/ships.ts';
import * as api from '../lib/api.ts';
import * as contracts from '../lib/contracts.ts';
import * as libShips from '../lib/ships.ts';
import * as systems from '../lib/systems.ts';
import * as utils from '../lib/utils.ts';

export async function init() {
	const cs = dbContracts.getContracts().filter(c => !c.fulfilled);
	cs.forEach(contract => run(contract));
}

async function run(contract: Contract) {
	await contracts.accept(contract);
	const contractSystem = utils.systemFromWaypoint(contract.terms.deliver[0].destinationSymbol);
	let ships = dbShips.getShipsAt(contractSystem);
	ships = ships.filter(ship => ship.registration.role !== 'SATELLITE'); // filter out probes

	switch(contract.type) {
		case 'PROCUREMENT':
			await runProcurement(contract, ships);
			break;
		default:
			throw `Handling of contract type ${contract.type} is not implemented yet`;
	}
}

async function runProcurement(contract: Contract, ships: Array<Ship>) {
	// TODO check if contract is fulfilled!
	const wantedCargo = contract.terms.deliver[0].tradeSymbol;
	const deliveryPoint = contract.terms.deliver[0].destinationSymbol;
	const asteroids = await systems.type(ships[0].nav.systemSymbol, 'ENGINEERED_ASTEROID');
	const asteroidSymbol = asteroids[0].symbol;
	ships.forEach(async function(ship) {
		while (true) {
			while (!contract.fulfilled) {
				ship = dbShips.getShip(ship.symbol);
				let goodCargo = ship.cargo.inventory.filter(i => i.symbol === wantedCargo)[0]
				// If we are in transit, we wait until we arrive
				const delay = new Date(ship.nav.route.arrival).getTime() - new Date().getTime();
				if (delay > 0) await api.sleep(delay);
				// Then it depends on where we are
				switch (ship.nav.waypointSymbol) {
					case asteroidSymbol:
						await mining.mineUntilFullFor(contract, ship, asteroidSymbol);
						await libShips.navigate(ship, deliveryPoint);
						break;
					case deliveryPoint:
						if (goodCargo !== undefined) { // we could be here if a client restart happens right after selling before we navigate away
							contract = await contracts.deliver(contract, ship);
							if (contract.fulfilled) break;
						}
						await libShips.navigate(ship, asteroidSymbol);
						break;
					default:
						if (await libShips.isFull(ship)) {
							await selling.sell(ship, wantedCargo);
						}
						await libShips.navigate(ship, asteroidSymbol);
				}
			}
			contract = await libShips.negotiate(ship); 	// TODO that's not correct, the procurement type can change
		}
	});
}