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 onTapCommunity: (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: $selectedTab,
                title: { $0.title }
            )

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

    @ViewBuilder
    private var tabContent: some View {
        switch selectedTab {
        case .recommendation:
            MainHomeRecommendationView(
                onTapLive: onTapLive,
                onTapCreator: onTapCreator,
                onTapContent: onTapContent,
                onTapCharacter: onTapCharacter,
                onTapCommunity: onTapCommunity
            )
        case .ranking:
            MainHomeRankingView()
        case .following:
            MainHomeFollowingView()
        }
    }
}

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 },
            onTapCommunity: { _ in }
        )
    }
}