import AppKit
import XCTest
@testable import MacTools

final class MenuBarStatusItemControllerTests: XCTestCase {
    func testNilEventDefaultsToComponentPanel() {
        XCTAssertEqual(MenuBarStatusItemInvocation.invocation(for: nil), .componentPanel)
    }

    func testLeftMouseDownOpensComponentPanelImmediately() {
        let event = NSEvent.mouseEvent(
            with: .leftMouseDown,
            location: .zero,
            modifierFlags: [],
            timestamp: 0,
            windowNumber: 0,
            context: nil,
            eventNumber: 0,
            clickCount: 1,
            pressure: 0
        )

        XCTAssertEqual(MenuBarStatusItemInvocation.invocation(for: event), .componentPanel)
    }

    func testLeftMouseUpStillOpensComponentPanelForProgrammaticFallback() {
        let event = NSEvent.mouseEvent(
            with: .leftMouseUp,
            location: .zero,
            modifierFlags: [],
            timestamp: 0,
            windowNumber: 0,
            context: nil,
            eventNumber: 0,
            clickCount: 1,
            pressure: 0
        )

        XCTAssertEqual(MenuBarStatusItemInvocation.invocation(for: event), .componentPanel)
    }

    func testRightMouseDownOpensFeaturePanelImmediately() {
        let event = NSEvent.mouseEvent(
            with: .rightMouseDown,
            location: .zero,
            modifierFlags: [],
            timestamp: 0,
            windowNumber: 0,
            context: nil,
            eventNumber: 0,
            clickCount: 1,
            pressure: 0
        )

        XCTAssertEqual(MenuBarStatusItemInvocation.invocation(for: event), .featurePanel)
    }

    func testRightMouseUpStillOpensFeaturePanelForProgrammaticFallback() {
        let event = NSEvent.mouseEvent(
            with: .rightMouseUp,
            location: .zero,
            modifierFlags: [],
            timestamp: 0,
            windowNumber: 0,
            context: nil,
            eventNumber: 0,
            clickCount: 1,
            pressure: 0
        )

        XCTAssertEqual(MenuBarStatusItemInvocation.invocation(for: event), .featurePanel)
    }

    func testModifierLeftClicksRouteOnlyOptionToRightClickAction() {
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocation(for: mouseEvent(.leftMouseUp, modifiers: [.control])),
            .componentPanel
        )
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocation(for: mouseEvent(.leftMouseUp, modifiers: [.option])),
            .featurePanel
        )
    }

    // MARK: - Swapped click behavior

    private func mouseEvent(_ type: NSEvent.EventType, modifiers: NSEvent.ModifierFlags = []) -> NSEvent? {
        NSEvent.mouseEvent(
            with: type,
            location: .zero,
            modifierFlags: modifiers,
            timestamp: 0,
            windowNumber: 0,
            context: nil,
            eventNumber: 0,
            clickCount: 1,
            pressure: 0
        )
    }

    func testSwappedLeftClickOpensFeaturePanel() {
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocation(for: mouseEvent(.leftMouseDown), swapped: true),
            .featurePanel
        )
    }

    func testSwappedRightClickOpensComponentPanel() {
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocation(for: mouseEvent(.rightMouseDown), swapped: true),
            .componentPanel
        )
    }

    func testSwappedNilEventOpensFeaturePanel() {
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocation(for: nil, swapped: true),
            .featurePanel
        )
    }

    func testSwappedModifierLeftClicksRouteOnlyOptionToRightClickAction() {
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocation(
                for: mouseEvent(.leftMouseUp, modifiers: [.control]),
                swapped: true
            ),
            .featurePanel
        )
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocation(
                for: mouseEvent(.leftMouseUp, modifiers: [.option]),
                swapped: true
            ),
            .componentPanel
        )
    }

    func testClickBehaviorPreferenceDefaultsToStandard() {
        let suite = "MenuBarClickBehaviorPreferenceTests-\(UUID().uuidString)"
        let defaults = UserDefaults(suiteName: suite)!
        defer { defaults.removePersistentDomain(forName: suite) }

        XCTAssertEqual(MenuBarClickBehaviorPreference.current(defaults), .standard)
        XCTAssertFalse(MenuBarClickBehaviorPreference.current(defaults).isSwapped)

        defaults.set(MenuBarClickBehaviorPreference.swapped.rawValue, forKey: MenuBarClickBehaviorPreference.userDefaultsKey)
        XCTAssertEqual(MenuBarClickBehaviorPreference.current(defaults), .swapped)
        XCTAssertTrue(MenuBarClickBehaviorPreference.current(defaults).isSwapped)
    }

    func testExpandedSessionUsesOptionAsRightClickAction() {
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocationForExpandedSession(
                swapped: false,
                liveModifierFlags: []
            ),
            .componentPanel
        )
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocationForExpandedSession(
                swapped: false,
                liveModifierFlags: [.control]
            ),
            .componentPanel
        )
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocationForExpandedSession(
                swapped: false,
                liveModifierFlags: [.option]
            ),
            .featurePanel
        )
        XCTAssertEqual(
            MenuBarStatusItemInvocation.invocationForExpandedSession(
                swapped: true,
                liveModifierFlags: [.option]
            ),
            .componentPanel
        )
    }

}