<?php

namespace Tests\Feature;

use Illuminate\Database\Eloquent\Collection;
use Illuminate\Foundation\Testing\DatabaseTransactions;
use Tests\TestCase;

use App\Models\{Address,Domain,Setup,System};

/**
 * Here we test mail routing.
 *
 * - COMMON to all routing nodes
 *   + We have RCs defined - everything for a node in the Region goes to an RC, unless RC's node defined locally, or nodes assigned to ZC
 *     ie: region_id is the same, find the NC/HUB/NODE address for the system_id that has been assigned 0/0 in the same region.
 *         nodes assigned to ZC have region_id = 0. Nodes with hub_id = NULL and host_id=0 are RC nodes.
 *   + We have NCs defined - everything under the Host goes to the NC, unless NC's nodes defined locally or nodes assigned to the RC
 *     ie: node_id defines the NCs responsible. Nodes with hub_id = NULL are an NC node.
 *   + We have HUBs defined - everything under the Hub goes to the HUB, unless HUB's nodes defined locally
 *     ie: hub_id defines who the hub is.
 *   + We have NODES defined - mail collected locally, including mail for it's point
 *
 * - Routing scenarios:
 *   - We are ZC for a domain
 *     + See COMMON
 *     + Everything else is collected locally
 *
 *   - We are RC for a domain
 *     + See COMMON
 *     + Any nodes in our RC not defined with an NC is collected locally, including points
 *     + Everything else is sent to the ZC (our uplink)
 *
 *   - We are NC for a domain
 *     + See COMMON
 *     + Any nodes in our NC not defined with a HUB is collected locally, including points
 *     + Everything else is sent to the RC or ZC (our uplink)
 *
 *   - We are a Hub for a domain
 *     + See COMMON
 *     + Any nodes in our HUB is collected locally, including points
 *     + Everything else is sent to the NC or RC (our uplink)
 *
 *   - We are a Node in a domain
 *     + See COMMON
 *     + Everything else is sent to the HUB or Host or RC (our uplink)
 *
 * @see Address::parent()
 * @see Address::children()
 */
class RoutingTest extends TestCase
{
	use DatabaseTransactions;

	private function zone(): Collection
	{
		//$this->seed(TestNodeHierarchy::class);

		$do = Domain::where('name','a')->singleOrFail();
		$zo = $do->zones->where('zone_id',100)->pop();
		return $zo->addresses;
	}

	private function session_zc(): void
	{
		$ao = Address::findFTN('101:0/0@a');
		$ao->system->sessions()->attach([$ao->zone_id=>['sespass'=>'ABCD']]);
	}

	private function session_rc(): void
	{
		$ao = Address::findFTN('100:1/0@a');
		$ao->system->sessions()->attach([$ao->zone_id=>['sespass'=>'ABCD']]);
	}

	private function session_nc(): void
	{
		$ao = Address::findFTN('100:10/0@a');
		$ao->system->sessions()->attach([$ao->zone_id=>['sespass'=>'ABCD']]);
	}

	private function session_hub(): void
	{
		$ao = Address::findFTN('100:10/20@a');
		$ao->system->sessions()->attach([$ao->zone_id=>['sespass'=>'ABCD']]);
	}

	// Make sure I'm configured correctly for the rest of the tests
	public function test_my_addresses()
	{
		$ftns = Setup::findOrFail(config('app.id'))->system->addresses;
		$this->assertEquals(1,$ftns->count());
	}

	// Get a list of active addresses in a Zone
	public function test_zc_addresses()
	{
		$nodes = $this->zone();
		$this->assertEquals(936,$nodes->count());
	}

	// Get a ZC with no session details, and make sure it has no parent nor children
	public function test_zc_no_session()
	{
		// Pick ZC without any session info - we have 0 children
		$ao = Address::findFTN('101:0/0@a');

		$this->assertEquals($ao->role,Address::NODE_ZC);
		$this->assertCount(0,$ao->children());
		$this->assertNull($ao->parent());
	}

	// If we have a ZC, make sure we are routing to all it's children
	public function test_zc_session_children()
	{
		$this->session_zc();

		$ao = Address::findFTN('101:0/0@a');
		$this->assertCount(935,$ao->children());
	}

	// An RC's parent should be the ZC, when we have session details with parent
	public function test_zc_rc_node_parent()
	{
		$this->session_zc();

		$ao = Address::findFTN('101:1/0@a');
		$this->assertEquals($ao->role,Address::NODE_RC);
		$this->assertEquals('101:0/0.0@a',$ao->parent()->ftn);
	}

	// Get a list of active addresses in a Region
	public function test_rc_session_children()
	{
		$this->session_rc();

		$ao = Address::findFTN('100:1/0@a');
		$this->assertEquals(185,$ao->children()->count());
	}

	// An RCs node still collects mail from the RC
	public function test_rc_node_rc()
	{
		$this->session_rc();

		// An RCs node should still be the RC
		$ao = Address::findFTN('100:1/100@a');
		$this->assertEquals($ao->role,Address::NODE_ACTIVE);
		$this->assertEquals('100:1/0.0@a',$ao->parent()->ftn);
	}

	// An NC collects mail for its children
	public function test_rc_nc_node_rc()
	{
		$this->session_rc();

		// A NCs parent should still be the RC
		$ao = Address::findFTN('100:10/0@a');
		$this->assertEquals($ao->role,Address::NODE_NC);
		$this->assertEquals('100:1/0.0@a',$ao->parent()->ftn);
	}

	// A Hub still collects mail from NC
	public function test_rc_hub_node_nc()
	{
		$this->session_rc();

		// A Hubs parent should still be the NC
		$ao = Address::findFTN('100:10/20.0@a');
		$this->assertEquals($ao->role,Address::NODE_HC);
		$this->assertEquals('100:1/0.0@a',$ao->parent()->ftn);
	}

	// A Hub's node still collects mail from Hub
	public function test_rc_hub_node_hub()
	{
		$this->session_rc();

		// A Hubs node should still be the Hub
		$ao = Address::findFTN('100:10/22.0@a');
		$this->assertEquals($ao->role,Address::NODE_ACTIVE);
		$this->assertEquals('100:1/0.0@a',$ao->parent()->ftn);
	}

	// An RCs parent is us even if we have session details for another RC
	public function test_rc_parent()
	{
		$this->session_rc();

		$ao = Address::findFTN('100:2/0@a');
		$this->assertNull($ao->parent()?->ftn);
	}

	// If we also have session details for an NC, then there are less RC nodes
	public function test_rc_nc_session_children()
	{
		$this->session_rc();
		$this->session_nc();

		$ao = Address::findFTN('100:1/0@a');
		$this->assertCount(185-36,$ao->children());
	}

	// If we also have session details for an Hub, then there are less RC nodes
	public function test_rc_hub_session_children()
	{
		$this->session_rc();

		$ao = Address::findFTN('100:10/20@a');
		$ao->system->sessions()->attach([$ao->zone_id=>['sespass'=>'ABCD']]);

		$ao = Address::findFTN('100:1/0@a');
		$this->assertCount(185-6,$ao->children());

		$ao = Address::findFTN('100:10/22@a');
		$this->assertEquals('100:10/20.0@a',$ao->parent()->ftn);
	}

	// If we also have session details for an Hub, then there are less RC nodes
	public function test_rc_hub_session_child()
	{
		$this->session_hub();

		$ao = Address::findFTN('100:10/22@a');
		$this->assertEquals('100:10/20.0@a',$ao->parent()->ftn);
	}

	// When we have an RC with session details, we route to all its children
	public function test_nc_session_children()
	{
		$this->session_nc();

		$ao = Address::findFTN('100:10/0@a');
		$this->assertCount(35,$ao->children());
	}

	public function test_complex_rc_nc_hc()
	{
		$this->session_rc();
		$this->session_nc();
		$this->session_hub();

		$ao = Address::findFTN('100:1/100.0@a');
		$this->assertCount(0,$ao->children());
		$this->assertEquals('100:1/0.0@a',$ao->parent()->ftn);

		// RC
		$ao = Address::findFTN('100:1/0.0@a');
		$this->assertCount(186-1-30-6,$ao->children());

		$ao = Address::findFTN('100:11/0.0@a');
		$this->assertEquals('100:1/0.0@a',$ao->parent()->ftn);

		// NC
		$ao = Address::findFTN('100:10/0.0@a');
		$this->assertCount(36-1-6,$ao->children());

		$ao = Address::findFTN('100:10/10.0@a');
		$this->assertEquals('100:10/0.0@a',$ao->parent()->ftn);

		// HC
		$ao = Address::findFTN('100:10/20.0@a');
		$this->assertCount(6-1,$ao->children());

		$ao = Address::findFTN('100:10/22.0@a');
		$this->assertEquals('100:10/20.0@a',$ao->parent()->ftn);
	}

	public function test_complex_rc_nc_hc_us()
	{
		$setup = Setup::findOrFail(config('app.id'));
		$ao = Address::findFTN('100:10/0.0@a');
		$setup->system_id = $ao->system_id;
		$setup->save();

		$this->session_rc();
		//$this->session_nc();
		$this->session_hub();
		$ao = Address::findFTN('100:11/0.0');
		$ao->system->sessions()->attach([$ao->zone_id=>['sespass'=>'ABCD']]);

		$ao = Address::findFTN('100:1/100.0@a');
		$this->assertCount(0,$ao->children());
		$this->assertEquals('100:1/0.0@a',$ao->parent()?->ftn);

		// RC
		$ao = Address::findFTN('100:1/0.0@a');
		$this->assertCount(186-36-36-1,$ao->children());

		$ao = Address::findFTN('100:11/0.0@a');
		$this->assertEquals('100:11/0.0@a',$ao->parent()->ftn);

		// NC
		$ao = Address::findFTN('100:10/0.0@a');
		$this->assertCount(36-6-1,$ao->children());

		$ao = Address::findFTN('100:10/10.0@a');
		$this->assertNull($ao->parent()?->ftn);

		// HC
		$ao = Address::findFTN('100:10/20.0@a');
		$this->assertCount(6-1,$ao->children());

		$ao = Address::findFTN('100:10/22.0@a');
		$this->assertEquals('100:10/20.0@a',$ao->parent()->ftn);
	}

	// A points parent is the node, if we have traffic for a point and we have session details for the node
	public function test_point_session_node()
	{
		//$this->session_hub();

		$so = new System;
		$so->name = 'Point System';
		$so->sysop = 'Point Sysop';
		$so->location = 'Melbourne, AU';
		$so->active = TRUE;
		$so->save();

		// Create a child
		$ao = Address::createFTN('100:10/21.2@a',$so);
		$ao->region_id = 1;	// @todo This should be worked out from the parent node (if exists), or another node on the same host
		$ao->save();

		$ao = Address::findFTN('100:10/21.0@a');
		$ao->system->sessions()->attach([$ao->zone_id=>['sespass'=>'ABCD']]);

		$ao = Address::findFTN('100:10/21.2@a');
		$this->assertEquals('100:10/21.0@a',$ao->parent()?->ftn);

		$ao = Address::findFTN('100:10/21@a');
		$this->assertCount(1,$ao->children());
	}
}