import XCTest
@testable import CommandNotch
import SwiftTerm

final class TerminalScrollWheelRouterTests: XCTestCase {
    func testMouseWheelForwardingRequiresMouseReportingAndActiveMouseMode() {
        XCTAssertFalse(TerminalScrollWheelRouter.shouldSendMouseWheel(
            allowMouseReporting: false,
            mouseMode: .vt200,
            deltaY: 1
        ))
        XCTAssertFalse(TerminalScrollWheelRouter.shouldSendMouseWheel(
            allowMouseReporting: true,
            mouseMode: .off,
            deltaY: 1
        ))
        XCTAssertFalse(TerminalScrollWheelRouter.shouldSendMouseWheel(
            allowMouseReporting: true,
            mouseMode: .vt200,
            deltaY: 0
        ))
        XCTAssertTrue(TerminalScrollWheelRouter.shouldSendMouseWheel(
            allowMouseReporting: true,
            mouseMode: .vt200,
            deltaY: -1
        ))
    }

    func testVelocityMatchesExpectedThresholds() {
        XCTAssertEqual(TerminalScrollWheelRouter.velocity(for: 1), 1)
        XCTAssertEqual(TerminalScrollWheelRouter.velocity(for: 2), 3)
        XCTAssertEqual(TerminalScrollWheelRouter.velocity(for: 6), 10)
        XCTAssertEqual(TerminalScrollWheelRouter.velocity(for: 10), 20)
    }

    func testGridPositionClampsToTerminalBounds() {
        let hit = TerminalScrollWheelRouter.gridPosition(
            point: CGPoint(x: 210, y: -10),
            bounds: CGRect(x: 0, y: 0, width: 200, height: 100),
            cols: 10,
            rows: 5
        )

        XCTAssertEqual(hit.x, 9)
        XCTAssertEqual(hit.y, 4)
        XCTAssertEqual(hit.pixelX, 200)
        XCTAssertEqual(hit.pixelY, 100)
    }
}