//
// 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 RoomMembersListScreenViewModelTests: XCTestCase {
    var viewModel: RoomMembersListScreenViewModel!
    
    var context: RoomMembersListScreenViewModel.Context {
        viewModel.context
    }
    
    func testJoinedMembers() async {
        setup(with: [.mockAlice, .mockBob])
        await context.nextViewState()
        XCTAssertEqual(viewModel.state.joinedMembersCount, 2)
        XCTAssertEqual(viewModel.state.visibleJoinedMembers.count, 2)
    }
    
    func testSearch() async {
        setup(with: [.mockAlice, .mockBob])
        await context.nextViewState()
        context.searchQuery = "alice"
        XCTAssertEqual(viewModel.state.joinedMembersCount, 2)
        XCTAssertEqual(viewModel.state.visibleJoinedMembers.count, 1)
    }
    
    func testEmptySearch() async {
        setup(with: [.mockAlice, .mockBob])
        await context.nextViewState()
        context.searchQuery = "WWW"
        XCTAssertEqual(viewModel.state.joinedMembersCount, 2)
        XCTAssertEqual(viewModel.state.visibleJoinedMembers.count, 0)
    }
    
    func testJoinedAndInvitedMembers() async {
        setup(with: [.mockInvitedAlice, .mockBob])
        await context.nextViewState()
        XCTAssertEqual(viewModel.state.joinedMembersCount, 1)
        XCTAssertEqual(viewModel.state.visibleInvitedMembers.count, 1)
        XCTAssertEqual(viewModel.state.visibleJoinedMembers.count, 1)
    }
    
    func testInvitedMembers() async {
        setup(with: [.mockInvitedAlice])
        await context.nextViewState()
        XCTAssertEqual(viewModel.state.joinedMembersCount, 0)
        XCTAssertEqual(viewModel.state.visibleInvitedMembers.count, 1)
        XCTAssertEqual(viewModel.state.visibleJoinedMembers.count, 0)
    }
    
    func testSearchInvitedMembers() async {
        setup(with: [.mockInvitedAlice])
        context.searchQuery = "alice"
        await context.nextViewState()
        XCTAssertEqual(viewModel.state.joinedMembersCount, 0)
        XCTAssertEqual(viewModel.state.visibleInvitedMembers.count, 1)
        XCTAssertEqual(viewModel.state.visibleJoinedMembers.count, 0)
    }
    
    private func setup(with members: [RoomMemberProxyMock]) {
        viewModel = .init(roomProxy: RoomProxyMock(with: .init(displayName: "test", members: members, joinedMembersCount: members.filter { $0.membership == .join }.count)),
                          mediaProvider: MockMediaProvider(),
                          userIndicatorController: ServiceLocator.shared.userIndicatorController)
    }
}