//
// Copyright 2022 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

@testable import ElementX

@MainActor
class InviteUsersScreenViewModelTests: XCTestCase {
    var viewModel: InviteUsersScreenViewModelProtocol!
    var clientProxy: MockClientProxy!
    var userDiscoveryService: UserDiscoveryServiceMock!
    
    var context: InviteUsersScreenViewModel.Context {
        viewModel.context
    }
    
    override func setUpWithError() throws {
        clientProxy = .init(userID: "")
        userDiscoveryService = UserDiscoveryServiceMock()
        userDiscoveryService.fetchSuggestionsReturnValue = .success([])
        userDiscoveryService.searchProfilesWithReturnValue = .success([])
        let userSession = MockUserSession(clientProxy: clientProxy, mediaProvider: MockMediaProvider())
        let viewModel = InviteUsersScreenViewModel(userSession: userSession, userDiscoveryService: userDiscoveryService)
        viewModel.state.usersSection = .init(type: .suggestions, users: [.mockAlice, .mockBob, .mockCharlie])
        self.viewModel = viewModel
    }
    
    func testSelectUser() {
        XCTAssertTrue(context.viewState.selectedUsers.isEmpty)
        context.send(viewAction: .tapUser(.mockAlice))
        XCTAssertTrue(context.viewState.selectedUsers.count == 1)
        XCTAssertEqual(context.viewState.selectedUsers.first?.userID, UserProfile.mockAlice.userID)
    }
    
    func testReselectUser() {
        XCTAssertTrue(context.viewState.selectedUsers.isEmpty)
        context.send(viewAction: .tapUser(.mockAlice))
        XCTAssertEqual(context.viewState.selectedUsers.count, 1)
        XCTAssertEqual(context.viewState.selectedUsers.first?.userID, UserProfile.mockAlice.userID)
        context.send(viewAction: .tapUser(.mockAlice))
        XCTAssertTrue(context.viewState.selectedUsers.isEmpty)
    }
    
    func testDeselectUser() {
        XCTAssertTrue(context.viewState.selectedUsers.isEmpty)
        context.send(viewAction: .tapUser(.mockAlice))
        XCTAssertEqual(context.viewState.selectedUsers.count, 1)
        XCTAssertEqual(context.viewState.selectedUsers.first?.userID, UserProfile.mockAlice.userID)
        context.send(viewAction: .deselectUser(.mockAlice))
        XCTAssertTrue(context.viewState.selectedUsers.isEmpty)
    }
}