//
//  XCUIApplication+Launch.swift
//  PlantGuideUITests
//
//  Created on 2026-01-21.
//

import XCTest

// MARK: - Launch Configuration Keys

/// Keys used for launch argument and environment configuration.
enum LaunchConfigKey {
    /// Launch arguments
    static let uiTesting = "-UITesting"
    static let cleanState = "-CleanState"
    static let mockData = "-MockData"
    static let offlineMode = "-OfflineMode"
    static let skipOnboarding = "-SkipOnboarding"

    /// Environment keys
    static let isUITesting = "IS_UI_TESTING"
    static let useMockData = "USE_MOCK_DATA"
    static let isOfflineMode = "IS_OFFLINE_MODE"
    static let mockAPIResponseDelay = "MOCK_API_RESPONSE_DELAY"
}

// MARK: - XCUIApplication Launch Extensions

extension XCUIApplication {

    // MARK: - Launch Configurations

    /// Launches the app with a clean state, resetting all user data and preferences.
    ///
    /// Use this for tests that need a fresh start without any prior data.
    /// This clears:
    /// - All saved plants in the collection
    /// - Care schedules and tasks
    /// - User preferences and settings
    /// - Cached images and API responses
    ///
    /// Example:
    /// ```swift
    /// let app = XCUIApplication()
    /// app.launchWithCleanState()
    /// ```
    func launchWithCleanState() {
        launchArguments.append(contentsOf: [
            LaunchConfigKey.uiTesting,
            LaunchConfigKey.cleanState,
            LaunchConfigKey.skipOnboarding
        ])

        launchEnvironment[LaunchConfigKey.isUITesting] = "YES"

        launch()
    }

    /// Launches the app with pre-populated mock data for testing.
    ///
    /// Use this for tests that need existing plants, care schedules,
    /// or other data to be present. The mock data includes:
    /// - Sample plants with various characteristics
    /// - Active care schedules with upcoming and overdue tasks
    /// - Saved user preferences
    ///
    /// - Parameter count: Number of mock plants to generate. Default is 5.
    ///
    /// Example:
    /// ```swift
    /// let app = XCUIApplication()
    /// app.launchWithMockData()
    /// ```
    func launchWithMockData(plantCount: Int = 5) {
        launchArguments.append(contentsOf: [
            LaunchConfigKey.uiTesting,
            LaunchConfigKey.mockData,
            LaunchConfigKey.skipOnboarding
        ])

        launchEnvironment[LaunchConfigKey.isUITesting] = "YES"
        launchEnvironment[LaunchConfigKey.useMockData] = "YES"
        launchEnvironment["MOCK_PLANT_COUNT"] = String(plantCount)

        launch()
    }

    /// Launches the app in offline mode to simulate network unavailability.
    ///
    /// Use this for tests that verify offline behavior:
    /// - Cached data is displayed correctly
    /// - Appropriate offline indicators appear
    /// - Network-dependent features show proper fallback UI
    /// - On-device ML identification still works
    ///
    /// Example:
    /// ```swift
    /// let app = XCUIApplication()
    /// app.launchOffline()
    /// ```
    func launchOffline() {
        launchArguments.append(contentsOf: [
            LaunchConfigKey.uiTesting,
            LaunchConfigKey.offlineMode,
            LaunchConfigKey.skipOnboarding
        ])

        launchEnvironment[LaunchConfigKey.isUITesting] = "YES"
        launchEnvironment[LaunchConfigKey.isOfflineMode] = "YES"

        launch()
    }

    /// Launches the app with custom configuration.
    ///
    /// Use this for tests requiring specific combinations of settings.
    ///
    /// - Parameters:
    ///   - cleanState: Whether to reset all app data
    ///   - mockData: Whether to use pre-populated test data
    ///   - offline: Whether to simulate offline mode
    ///   - apiDelay: Simulated API response delay in seconds (0 = instant)
    ///   - additionalArguments: Any extra launch arguments needed
    ///   - additionalEnvironment: Any extra environment variables needed
    ///
    /// Example:
    /// ```swift
    /// let app = XCUIApplication()
    /// app.launchWithConfiguration(
    ///     mockData: true,
    ///     apiDelay: 2.0  // Slow API to test loading states
    /// )
    /// ```
    func launchWithConfiguration(
        cleanState: Bool = false,
        mockData: Bool = false,
        offline: Bool = false,
        apiDelay: TimeInterval = 0,
        additionalArguments: [String] = [],
        additionalEnvironment: [String: String] = [:]
    ) {
        // Base arguments
        launchArguments.append(LaunchConfigKey.uiTesting)
        launchArguments.append(LaunchConfigKey.skipOnboarding)

        // Optional arguments
        if cleanState {
            launchArguments.append(LaunchConfigKey.cleanState)
        }
        if mockData {
            launchArguments.append(LaunchConfigKey.mockData)
        }
        if offline {
            launchArguments.append(LaunchConfigKey.offlineMode)
        }

        // Additional arguments
        launchArguments.append(contentsOf: additionalArguments)

        // Environment variables
        launchEnvironment[LaunchConfigKey.isUITesting] = "YES"
        launchEnvironment[LaunchConfigKey.useMockData] = mockData ? "YES" : "NO"
        launchEnvironment[LaunchConfigKey.isOfflineMode] = offline ? "YES" : "NO"

        if apiDelay > 0 {
            launchEnvironment[LaunchConfigKey.mockAPIResponseDelay] = String(apiDelay)
        }

        // Additional environment
        for (key, value) in additionalEnvironment {
            launchEnvironment[key] = value
        }

        launch()
    }
}

// MARK: - Element Waiting Extensions

extension XCUIElement {

    /// Waits for the element to exist with a configurable timeout.
    ///
    /// - Parameter timeout: Maximum time to wait in seconds. Default is 5 seconds.
    /// - Returns: True if element exists within timeout, false otherwise.
    @discardableResult
    func waitForExistence(timeout: TimeInterval = 5) -> Bool {
        return self.waitForExistence(timeout: timeout)
    }

    /// Waits for the element to exist and be hittable.
    ///
    /// - Parameter timeout: Maximum time to wait in seconds. Default is 5 seconds.
    /// - Returns: True if element is hittable within timeout, false otherwise.
    @discardableResult
    func waitForHittable(timeout: TimeInterval = 5) -> Bool {
        let predicate = NSPredicate(format: "exists == true AND isHittable == true")
        let expectation = XCTNSPredicateExpectation(predicate: predicate, object: self)
        let result = XCTWaiter.wait(for: [expectation], timeout: timeout)
        return result == .completed
    }

    /// Waits for the element to not exist (disappear).
    ///
    /// - Parameter timeout: Maximum time to wait in seconds. Default is 5 seconds.
    /// - Returns: True if element no longer exists within timeout, false otherwise.
    @discardableResult
    func waitForNonExistence(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
    }

    /// Waits for the element's value to match the expected value.
    ///
    /// - Parameters:
    ///   - expectedValue: The value to wait for.
    ///   - timeout: Maximum time to wait in seconds. Default is 5 seconds.
    /// - Returns: True if element's value matches within timeout, false otherwise.
    @discardableResult
    func waitForValue(_ expectedValue: String, timeout: TimeInterval = 5) -> Bool {
        let predicate = NSPredicate(format: "value == %@", expectedValue)
        let expectation = XCTNSPredicateExpectation(predicate: predicate, object: self)
        let result = XCTWaiter.wait(for: [expectation], timeout: timeout)
        return result == .completed
    }
}

// MARK: - App State Verification Extensions

extension XCUIApplication {

    /// Verifies the app launched successfully by checking for the tab bar.
    ///
    /// - Parameter timeout: Maximum time to wait for the tab bar. Default is 10 seconds.
    /// - Returns: True if tab bar appears, false otherwise.
    @discardableResult
    func verifyLaunched(timeout: TimeInterval = 10) -> Bool {
        let tabBar = self.tabBars.firstMatch
        return tabBar.waitForExistence(timeout: timeout)
    }

    /// Navigates to a specific tab by tapping on it.
    ///
    /// - Parameter tabName: The accessible label of the tab (e.g., "Camera", "Collection").
    func navigateToTab(_ tabName: String) {
        let tabButton = self.tabBars.buttons[tabName]
        if tabButton.waitForExistence(timeout: 5) {
            tabButton.tap()
        }
    }
}

// MARK: - Accessibility Identifier Constants

/// Accessibility identifiers used throughout the app.
/// Use these constants in tests to locate elements reliably.
enum AccessibilityID {
    // MARK: - Tab Bar
    enum TabBar {
        static let camera = "Camera"
        static let collection = "Collection"
        static let care = "Care"
        static let settings = "Settings"
    }

    // MARK: - Camera View
    enum Camera {
        static let captureButton = "captureButton"
        static let retakeButton = "retakeButton"
        static let usePhotoButton = "usePhotoButton"
        static let permissionRequestView = "permissionRequestView"
        static let permissionDeniedView = "permissionDeniedView"
        static let cameraPreview = "cameraPreview"
        static let capturedImagePreview = "capturedImagePreview"
    }

    // MARK: - Collection View
    enum Collection {
        static let gridView = "collectionGridView"
        static let listView = "collectionListView"
        static let searchField = "collectionSearchField"
        static let filterButton = "filterButton"
        static let viewModeToggle = "viewModeToggle"
        static let emptyState = "collectionEmptyState"
        static let plantCell = "plantCell"
        static let favoriteButton = "favoriteButton"
        static let deleteButton = "deleteButton"
    }

    // MARK: - Settings View
    enum Settings {
        static let offlineModeToggle = "offlineModeToggle"
        static let clearCacheButton = "clearCacheButton"
        static let apiStatusSection = "apiStatusSection"
        static let versionLabel = "versionLabel"
        static let confirmClearCacheButton = "confirmClearCacheButton"
    }

    // MARK: - Plant Detail View
    enum PlantDetail {
        static let headerSection = "plantHeaderSection"
        static let careInfoSection = "careInformationSection"
        static let upcomingTasksSection = "upcomingTasksSection"
        static let careScheduleButton = "careScheduleButton"
    }

    // MARK: - Care Schedule View
    enum CareSchedule {
        static let taskList = "careTaskList"
        static let overdueSection = "overdueTasksSection"
        static let todaySection = "todayTasksSection"
        static let emptyState = "careEmptyState"
        static let filterButton = "careFilterButton"
    }
}