import SwiftUI

struct MainHomeView: View {
    let onTapCanCharge: () -> Void
    let onTapSearch: () -> Void
    let onTapNotificationList: () -> Void
    let onTapLive: (Int) -> Void
    let onTapCreator: (Int) -> Void
    let onTapContent: (Int) -> Void
    let onTapCharacter: (Int) -> Void
    let onTapCommunityPost: (Int) -> Void
    let onTapBanner: (RecommendationBannerResponse) -> Void
    let onTapFollowAll: (@escaping () -> Void) -> Void
    let onSelectFollowingTab: () -> Bool
    let onTapFollowingLogin: () -> Void
    let onTapFollowingAll: () -> Void
    let onTapChatTab: () -> Void
    let onTapChatRoom: (Int, String) -> Void
    let onTapFollowingSchedule: (CreatorActivityType, Int) -> Void

    @State private var selectedTab: MainHomeTab = .recommendation

    var body: some View {
        VStack(spacing: 0) {
            HomeTitleBar {
                HStack(spacing: 14) {
                    Image("ic_bar_cash")
                        .onTapGesture { onTapCanCharge() }

                    Image("ic_bar_search")
                        .onTapGesture { onTapSearch() }

                    Image("ic_bar_bell")
                        .onTapGesture { onTapNotificationList() }
                }
            }

            TextTabBar(
                items: MainHomeTab.allCases,
                selectedItem: selectedTabBinding,
                title: { $0.title }
            )

            tabContent
                .frame(maxWidth: .infinity, maxHeight: .infinity)
        }
        .background(Color.black.ignoresSafeArea())
    }

    private var selectedTabBinding: Binding<MainHomeTab> {
        Binding(
            get: { selectedTab },
            set: { newValue in
                if newValue == .following, onSelectFollowingTab() == false {
                    return
                }

                selectedTab = newValue
            }
        )
    }

    @ViewBuilder
    private var tabContent: some View {
        switch selectedTab {
        case .recommendation:
            MainHomeRecommendationView(
                onTapLive: onTapLive,
                onTapCreator: onTapCreator,
                onTapContent: onTapContent,
                onTapCharacter: onTapCharacter,
                onTapCommunityPost: onTapCommunityPost,
                onTapBanner: onTapBanner,
                onTapFollowAll: onTapFollowAll
            )
        case .ranking:
            MainHomeRankingView(onTapCreator: onTapCreator)
        case .following:
            MainHomeFollowingView(
                onTapLive: onTapLive,
                onTapCreator: onTapCreator,
                onTapContent: onTapContent,
                onTapLogin: onTapFollowingLogin,
                onTapFollowingAll: onTapFollowingAll,
                onTapChatTab: onTapChatTab,
                onTapChatRoom: onTapChatRoom,
                onTapSchedule: onTapFollowingSchedule,
                onTapCommunityPost: onTapCommunityPost
            )
        }
    }
}

private enum MainHomeTab: CaseIterable, Hashable {
    case recommendation
    case ranking
    case following

    var title: String {
        switch self {
        case .recommendation:
            return "추천"
        case .ranking:
            return "랭킹"
        case .following:
            return "팔로잉"
        }
    }
}

struct MainHomeView_Previews: PreviewProvider {
    static var previews: some View {
        MainHomeView(
            onTapCanCharge: {},
            onTapSearch: {},
            onTapNotificationList: {},
            onTapLive: { _ in },
            onTapCreator: { _ in },
            onTapContent: { _ in },
            onTapCharacter: { _ in },
            onTapCommunityPost: { _ in },
            onTapBanner: { _ in },
            onTapFollowAll: { action in action() },
            onSelectFollowingTab: { true },
            onTapFollowingLogin: {},
            onTapFollowingAll: {},
            onTapChatTab: {},
            onTapChatRoom: { _, _ in },
            onTapFollowingSchedule: { _, _ in }
        )
    }
}