//
// Copyright 2021 New Vector Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

import XCTest
import RiotSwiftUI

class OnboardingAvatarUITests: MockScreenTest {

    override class var screenType: MockScreenState.Type {
        return MockOnboardingAvatarScreenState.self
    }

    override class func createTest() -> MockScreenTest {
        return OnboardingAvatarUITests(selector: #selector(verifyOnboardingAvatarScreen))
    }

    func verifyOnboardingAvatarScreen() throws {
        guard let screenState = screenState as? MockOnboardingAvatarScreenState else { fatalError("no screen") }
        switch screenState {
        case .placeholderAvatar(let userId, let displayName):
            verifyPlaceholderAvatar(userId: userId, displayName: displayName)
        case .userSelectedAvatar:
            verifyUserSelectedAvatar()
        }
    }
    
    func verifyPlaceholderAvatar(userId: String, displayName: String) {
        guard let firstLetter = displayName.uppercased().first else {
            XCTFail("Unable to get the first letter of the display name.")
            return
        }
        
        let placeholderAvatar = app.staticTexts["placeholderAvatar"]
        XCTAssertTrue(placeholderAvatar.exists, "The placeholder avatar should be shown.")
        XCTAssertEqual(placeholderAvatar.label, String(firstLetter), "The placeholder avatar should show the first letter of the display name.")
        
        let avatarImage = app.images["avatarImage"]
        XCTAssertFalse(avatarImage.exists, "The avatar image should be hidden as no selection has been made.")
        
        let saveButton = app.buttons["saveButton"]
        XCTAssertTrue(saveButton.exists, "There should be a save button.")
        XCTAssertFalse(saveButton.isEnabled, "The save button should not be enabled.")
    }
    
    func verifyUserSelectedAvatar() {
        let placeholderAvatar = app.otherElements["placeholderAvatar"]
        XCTAssertFalse(placeholderAvatar.exists, "The placeholder avatar should be hidden.")
        
        let avatarImage = app.images["avatarImage"]
        XCTAssertTrue(avatarImage.exists, "The selected avatar should be shown.")
        
        let saveButton = app.buttons["saveButton"]
        XCTAssertTrue(saveButton.exists, "There should be a save button.")
        XCTAssertTrue(saveButton.isEnabled, "The save button should be enabled.")
    }
}
