import XCTest
@testable import RouterOSAssistant

final class PortConflictTests: XCTestCase {
    func testBridgeMembershipProducesNoResolutionCommand() {
        // DhcpServerCommandBuilder already unconditionally detaches any bridge membership —
        // repeating it here would just be a harmless duplicate at best, so it's deliberately
        // excluded from this list.
        let conflict = PortConflict(interfaceName: "ether4", reasons: [.bridgeMember(bridgeName: "bridge")])
        XCTAssertTrue(conflict.resolutionCommands().isEmpty)
    }

    func testExistingAddressIsRemovedByInterfaceMatch() {
        let conflict = PortConflict(interfaceName: "ether4", reasons: [.hasAddresses(["10.0.0.1/24"])])
        let commands = conflict.resolutionCommands()

        XCTAssertEqual(commands.count, 1)
        XCTAssertEqual(commands[0].menuPath, "/ip address")
        XCTAssertEqual(commands[0].operation, .remove(matchField: "interface", matchValue: "ether4"))
    }

    func testDhcpClientAndPppoeClientAreBothRemoved() {
        let conflict = PortConflict(interfaceName: "ether1", reasons: [.dhcpClient, .pppoeClient])
        let commands = conflict.resolutionCommands()

        XCTAssertEqual(commands.count, 2)
        XCTAssertEqual(commands[0].menuPath, "/ip dhcp-client")
        XCTAssertEqual(commands[0].operation, .remove(matchField: "interface", matchValue: "ether1"))
        XCTAssertEqual(commands[1].menuPath, "/interface pppoe-client")
        XCTAssertEqual(commands[1].operation, .remove(matchField: "interface", matchValue: "ether1"))
    }

    /// Regression test for the Experte-tab "Port freimachen?" flow (per explicit request): unlike
    /// the Setup Wizard, the Experte tab has no separate step that unconditionally detaches a
    /// bridge port on its own, so its resolution list must include that removal explicitly —
    /// `resolutionCommands()` alone (the wizard's version) deliberately leaves it out.
    func testResolutionCommandsIncludingBridgeDetachAddsBridgePortRemoval() {
        let conflict = PortConflict(interfaceName: "ether4", reasons: [.bridgeMember(bridgeName: "bridge")])
        let commands = conflict.resolutionCommandsIncludingBridgeDetach()

        XCTAssertEqual(commands.count, 1)
        XCTAssertEqual(commands[0].menuPath, "/interface bridge port")
        XCTAssertEqual(commands[0].operation, .remove(matchField: "interface", matchValue: "ether4"))
    }

    func testResolutionCommandsIncludingBridgeDetachKeepsOtherReasonsToo() {
        let conflict = PortConflict(interfaceName: "ether4", reasons: [.bridgeMember(bridgeName: "bridge"), .dhcpClient])
        let commands = conflict.resolutionCommandsIncludingBridgeDetach()

        XCTAssertEqual(commands.count, 2)
        XCTAssertEqual(commands[0].menuPath, "/interface bridge port")
        XCTAssertEqual(commands[1].menuPath, "/ip dhcp-client")
    }
}