//
//  WaitHelpers.swift
//  Tests iOS
//
//  Centralized, explicit wait helpers. No sleep() allowed.
//

import XCTest

extension XCUIElement {

    /// Wait for the element to exist in the hierarchy.
    /// - Parameters:
    ///   - timeout: Maximum seconds to wait.
    ///   - message: Custom failure message.
    /// - Returns: `true` if the element exists within the timeout.
    @discardableResult
    func waitForExistence(timeout: TimeInterval = 5, message: String? = nil) -> Bool {
        let result = waitForExistence(timeout: timeout)
        if !result, let message = message {
            XCTFail(message)
        }
        return result
    }

    /// Wait until the element is hittable (exists and is enabled/visible).
    /// - Parameter timeout: Maximum seconds to wait.
    @discardableResult
    func waitUntilHittable(timeout: TimeInterval = 5) -> Bool {
        let predicate = NSPredicate(format: "isHittable == true")
        let expectation = XCTNSPredicateExpectation(predicate: predicate, object: self)
        let result = XCTWaiter.wait(for: [expectation], timeout: timeout)
        return result == .completed
    }

    /// Tap the element after waiting for it to become hittable.
    /// - Parameter timeout: Maximum seconds to wait before tapping.
    func tapWhenReady(timeout: TimeInterval = 5, file: StaticString = #file, line: UInt = #line) {
        guard waitUntilHittable(timeout: timeout) else {
            XCTFail("Element \(identifier) not hittable after \(timeout)s", file: file, line: line)
            return
        }
        tap()
    }

    /// Wait for the element to disappear from the hierarchy.
    /// - Parameter timeout: Maximum seconds to wait.
    @discardableResult
    func waitForDisappearance(timeout: TimeInterval = 5) -> Bool {
        let predicate = NSPredicate(format: "exists == false")
        let expectation = XCTNSPredicateExpectation(predicate: predicate, object: self)
        let result = XCTWaiter.wait(for: [expectation], timeout: timeout)
        return result == .completed
    }
}

extension XCUIApplication {

    /// Wait for any element matching the identifier to exist.
    func waitForElement(identifier: String, timeout: TimeInterval = 5) -> XCUIElement {
        let element = descendants(matching: .any).matching(identifier: identifier).firstMatch
        _ = element.waitForExistence(timeout: timeout)
        return element
    }
}