import XCTest

final class ScreensUITests: XCTestCase {
    override func setUp() {
        continueAfterFailure = false
    }

    @MainActor
    func testLayoutFillsScreenAndCoreFlows() {
        let app = XCUIApplication()
        app.launch()

        // ---- Top chrome is present and flush with the safe area top.
        let title = app.staticTexts["Screens"]
        XCTAssertTrue(title.waitForExistence(timeout: 5), "Title should appear")

        let screenFrame = app.windows.firstMatch.frame
        let titleY = title.frame.midY
        XCTAssertLessThan(titleY, screenFrame.height * 0.25,
                          "Title should sit in the top 25% of the screen; actual Y \(titleY) in screen \(screenFrame.height)")

        // ---- Tap + to open Add Connection sheet.
        let addButton = app.buttons["Add connection"]
        XCTAssertTrue(addButton.exists, "Add button should exist")
        addButton.tap()

        let displayNameField = app.textFields["Display name"]
        XCTAssertTrue(displayNameField.waitForExistence(timeout: 2),
                      "Add Connection sheet should present and show Display name field")

        app.buttons["Cancel"].tap()
        XCTAssertFalse(displayNameField.waitForExistence(timeout: 1),
                       "Add sheet should dismiss on Cancel")

        // ---- Settings gear opens Settings sheet.
        app.buttons["Settings"].tap()
        let settingsTitle = app.navigationBars.staticTexts["Settings"]
        XCTAssertTrue(settingsTitle.waitForExistence(timeout: 2),
                      "Settings sheet should present")
        app.buttons["Done"].tap()

        // ---- Search field accepts input and clears.
        let search = app.textFields.matching(NSPredicate(format: "placeholderValue == %@", "Search connections")).firstMatch
        XCTAssertTrue(search.waitForExistence(timeout: 2), "Search field should exist")
        search.tap()
        search.typeText("mini")
        XCTAssertEqual(search.value as? String, "mini",
                       "Search text should round-trip")
        // Title should still be visible (top chrome does not scroll off)
        XCTAssertTrue(title.isHittable, "Title should remain on screen during search")

        // ---- Empty-state CTA routes to Add Connection.
        let emptyCTA = app.buttons["Add a computer"]
        if emptyCTA.waitForExistence(timeout: 1) {
            // clear search first
            app.buttons["Clear search"].tap()
            emptyCTA.tap()
            XCTAssertTrue(displayNameField.waitForExistence(timeout: 2),
                          "Empty-state CTA should present Add Connection sheet")
            app.buttons["Cancel"].tap()
        }
    }
}