import XCTest
@testable import NetworkCityCore

final class OrgClassifierTests: XCTestCase {

    func testRegistrableDomainSimple() {
        XCTAssertEqual(OrgClassifier.registrableDomain("cdn.gstatic.com"), "gstatic.com")
        XCTAssertEqual(OrgClassifier.registrableDomain("a.b.c.example.org"), "example.org")
    }

    func testRegistrableDomainMultiPartSuffix() {
        XCTAssertEqual(OrgClassifier.registrableDomain("www.bbc.co.uk"), "bbc.co.uk")
        XCTAssertEqual(OrgClassifier.registrableDomain("shop.foo.com.au"), "foo.com.au")
    }

    func testRegistrableDomainHandlesTrailingDot() {
        XCTAssertEqual(OrgClassifier.registrableDomain("host.apple.com."), "apple.com")
    }

    func testKnownOrgsCollapseToOneDistrict() {
        // Different registrable domains, same owner -> same key.
        let a = OrgClassifier.classify(ip: "1", ptr: "cdn.gstatic.com")
        let b = OrgClassifier.classify(ip: "2", ptr: "lb.1e100.net")
        XCTAssertEqual(a.key, "google")
        XCTAssertEqual(b.key, "google")
        XCTAssertEqual(a.name, "Google")
    }

    func testAppleFamilyCollapses() {
        XCTAssertEqual(OrgClassifier.classify(ip: "1", ptr: "x.icloud.com").key, "apple")
        XCTAssertEqual(OrgClassifier.classify(ip: "2", ptr: "y.aaplimg.com").key, "apple")
    }

    func testUnknownDomainGetsPrettyName() {
        let org = OrgClassifier.classify(ip: "9.9.9.9", ptr: "resolver.quad9.net")
        XCTAssertEqual(org.key, "quad9.net")
        XCTAssertEqual(org.name, "Quad9")
    }

    func testNoPTRFallsBackToIP() {
        let org = OrgClassifier.classify(ip: "203.0.113.7", ptr: nil)
        XCTAssertEqual(org.key, "203.0.113.7")
        XCTAssertEqual(org.name, "203.0.113.7")
        XCTAssertNil(org.resolvedHost)
    }
}