//
//  TabBarScreen.swift
//  PlantGuideUITests
//
//  Screen object for the main tab bar.
//

import XCTest

struct TabBarScreen {
    let app: XCUIApplication

    // MARK: - Elements

    var tabBar: XCUIElement { app.tabBars.firstMatch }
    var cameraTab: XCUIElement { tabBar.buttons[UITestID.TabBar.camera] }
    var collectionTab: XCUIElement { tabBar.buttons[UITestID.TabBar.collection] }
    var todayTab: XCUIElement { tabBar.buttons[UITestID.TabBar.today] }
    var settingsTab: XCUIElement { tabBar.buttons[UITestID.TabBar.settings] }

    var allTabLabels: [String] {
        [UITestID.TabBar.camera,
         UITestID.TabBar.collection,
         UITestID.TabBar.today,
         UITestID.TabBar.settings]
    }

    // MARK: - Actions

    /// Taps a tab button using existence-based wait (not hittable — tab bar buttons
    /// report isHittable == false in iOS 26 simulator despite being tappable).
    private func tapTab(_ tab: XCUIElement) {
        XCTAssertTrue(tab.waitForExistence(timeout: 10),
                      "Tab '\(tab.label)' not found within 10s")
        tab.tap()
    }

    @discardableResult
    func tapCamera() -> CameraScreen {
        tapTab(cameraTab)
        return CameraScreen(app: app)
    }

    @discardableResult
    func tapCollection() -> CollectionScreen {
        tapTab(collectionTab)
        return CollectionScreen(app: app)
    }

    @discardableResult
    func tapToday() -> TodayScreen {
        tapTab(todayTab)
        return TodayScreen(app: app)
    }

    @discardableResult
    func tapSettings() -> SettingsScreen {
        tapTab(settingsTab)
        return SettingsScreen(app: app)
    }

    // MARK: - Assertions

    func assertAllTabsExist() {
        XCTAssertTrue(tabBar.waitForExistence(timeout: 10), "Tab bar missing")
        for label in allTabLabels {
            XCTAssertTrue(tabBar.buttons[label].waitForExistence(timeout: 5),
                          "Tab '\(label)' missing")
        }
    }

    func assertSelected(_ label: String) {
        let tab = tabBar.buttons[label]
        XCTAssertTrue(tab.waitForExistence(timeout: 5), "Tab '\(label)' not found")
        XCTAssertTrue(tab.isSelected, "Tab '\(label)' not selected")
    }
}