import XCTest

final class TimelineUITests: XCTestCase {
    override func setUpWithError() throws {
        continueAfterFailure = false
    }

    private func launchApp() -> XCUIApplication {
        let app = XCUIApplication()
        app.launchArguments = ["-luma-ui-test-chat"]
        app.launch()
        return app
    }

    private func bubble(_ id: String, in app: XCUIApplication) -> XCUIElement {
        app.descendants(matching: .any).matching(identifier: "bubble-\(id)").firstMatch
    }

    private func openChat(_ app: XCUIApplication) {
        let chatRow = app.staticTexts["uitest-peer"]
        XCTAssertTrue(chatRow.waitForExistence(timeout: 15))
        chatRow.tap()
        XCTAssertTrue(
            app.descendants(matching: .any).matching(identifier: "chat-timeline").firstMatch
                .waitForExistence(timeout: 15)
        )
        XCTAssertTrue(bubble("uitest-msg-60", in: app).waitForExistence(timeout: 15))
    }

    func testTimelineVerticalScrollWorks() throws {
        let app = launchApp()
        openChat(app)

        for _ in 0..<7 {
            app.swipeDown()
        }
        XCTAssertTrue(bubble("uitest-msg-1", in: app).waitForExistence(timeout: 10))

        for _ in 0..<9 {
            app.swipeUp()
        }
        XCTAssertTrue(bubble("uitest-msg-60", in: app).waitForExistence(timeout: 10))
    }

    func testReplySwipeShowsPlateAndScrollStillWorks() throws {
        let app = launchApp()
        openChat(app)

        // Message 60 can sit partially behind the composer, so drag on a
        // bubble that is reliably visible and hittable in the bottom area.
        let target = bubble("uitest-msg-55", in: app)
        XCTAssertTrue(target.waitForExistence(timeout: 10))
        XCTAssertTrue(target.isHittable, "The swipe target must be hittable")
        // A controlled right-to-left drag: the stock swipeLeft() flicks too
        // fast for the gesture's horizontal lock to engage reliably.
        let start = target.coordinate(withNormalizedOffset: CGVector(dx: 0.9, dy: 0.5))
        start.press(forDuration: 0.15, thenDragTo: start.withOffset(CGVector(dx: -200, dy: 0)))
        let attachment = XCTAttachment(screenshot: app.screenshot())
        attachment.name = "after-drag"
        attachment.lifetime = .keepAlways
        add(attachment)
        XCTAssertTrue(
            app.descendants(matching: .any).matching(identifier: "reply-banner").firstMatch
                .waitForExistence(timeout: 5),
            "A left swipe must open the reply plate"
        )

        app.buttons["Отменить ответ"].tap()
        for _ in 0..<7 {
            app.swipeDown()
        }
        XCTAssertTrue(bubble("uitest-msg-1", in: app).waitForExistence(timeout: 10))
    }
}