import SwiftUI

struct MainChatRoomListItem: View {
    let room: MainChatRoomItem
    let onTap: (Int, String) -> Void

    var body: some View {
        Button {
            onTap(room.roomId, room.chatType)
        } label: {
            HStack(alignment: .center, spacing: SodaSpacing.s14) {
                DownsampledKFImage(url: URL(string: room.targetImageUrl), size: CGSize(width: 58, height: 58))
                    .clipShape(Circle())

                VStack(alignment: .leading, spacing: SodaSpacing.s12) {
                    HStack(alignment: .center, spacing: SodaSpacing.s6) {
                        Text(room.targetName)
                            .appFont(size: 18, weight: .bold)
                            .foregroundColor(.white)
                            .lineLimit(1)
                            .truncationMode(.tail)

                        if room.isDirectMessage {
                            MainChatDirectTagView()
                        }

                        Spacer(minLength: SodaSpacing.s8)

                        Text(room.chatListDateText())
                            .appFont(size: 14, weight: .medium)
                            .foregroundColor(Color.gray500)
                            .lineLimit(1)
                    }

                    Text(room.lastMessage)
                        .appFont(size: 16, weight: .medium)
                        .foregroundColor(Color.gray500)
                        .lineLimit(1)
                        .truncationMode(.tail)
                }
                .frame(maxWidth: .infinity, alignment: .leading)
            }
            .padding(SodaSpacing.s14)
            .contentShape(Rectangle())
        }
        .buttonStyle(.plain)
    }
}

private struct MainChatDirectTagView: View {
    var body: some View {
        Text(I18n.MainChat.directTag)
            .appFont(size: 12, weight: .bold)
            .italic()
            .foregroundColor(.white)
            .padding(.horizontal, SodaSpacing.s4)
            .padding(.vertical, SodaSpacing.s4)
            .background(Color.soda400)
            .cornerRadius(4)
    }
}

private extension MainChatRoomItem {
    var isDirectMessage: Bool {
        chatType == "DM"
    }

    func chatListDateText(now: Date = Date()) -> String {
        DateParser.chatListDateText(fromUTC: lastMessageAt, fallback: lastMessageAt, now: now)
    }
}

struct MainChatRoomListItem_Previews: PreviewProvider {
    static var previews: some View {
        MainChatRoomListItem(
            room: MainChatRoomItem(
                roomId: 1,
                chatType: "DM",
                targetName: "크리에이터 이름",
                targetImageUrl: "https://picsum.photos/500/500",
                lastMessage: "마지막 대화 내용이 들어가는 부분입니다. 한 줄 넘어가는경우 말줄임",
                lastMessageAt: "2026-07-01T01:30:00Z"
            ),
            onTap: { _, _ in }
        )
        .background(Color.black)
        .previewLayout(.sizeThatFits)
    }
}