//
//  ChatTabView.swift
//  SodaLive
//
//  Created by klaus on 8/29/25.
//

import SwiftUI

struct ChatTabView: View {
    @AppStorage("token") private var token: String = UserDefaults.string(forKey: UserDefaultsKey.token)
    
    private enum InnerTab: Int, CaseIterable {
        case character = 0
        case talk = 1
        
        var title: String {
            switch self {
            case .character: return "캐릭터"
            case .talk: return "톡"
            }
        }
    }
    
    @State private var selectedTab: InnerTab = .character
    
    var body: some View {
        VStack(alignment: .leading, spacing: 0) {
            // 앱 바
            HStack(spacing: 24) {
                Image("img_text_logo")
                
                Spacer()
                
                if !token.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
                    Image("ic_search_white")
                        .onTapGesture {
                            AppState
                                .shared
                                .setAppStep(step: .search)
                        }
                    
                    Image("ic_can")
                        .onTapGesture {
                            AppState
                                .shared
                                .setAppStep(step: .canCharge(refresh: {}))
                        }
                }
            }
            .padding(.horizontal, 24)
            .padding(.vertical, 20)
            
            // 내부 탭 (캐릭터 / 톡)
            HStack(spacing: 0) {
                ChatInnerTab(
                    title: InnerTab.character.title,
                    isSelected: selectedTab == .character,
                    onTap: { if selectedTab != .character { selectedTab = .character } }
                )
                
                ChatInnerTab(
                    title: InnerTab.talk.title,
                    isSelected: selectedTab == .talk,
                    onTap: { if selectedTab != .talk { selectedTab = .talk } }
                )
            }
            .padding(.bottom, 12)
            
            Group {
                switch selectedTab {
                case .character:
                    CharacterView()
                case .talk:
                    TalkView()
                }
            }
            .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
        }
    }
}

struct ChatInnerTab: View {
    let title: String
    let isSelected: Bool
    let onTap: () -> Void
    
    var body: some View {
        Button(action: onTap) {
            VStack(spacing: 0) {
                Spacer()
                
                Text(title)
                    .font(
                        .custom(
                            isSelected ? Font.preBold.rawValue : Font.preRegular.rawValue,
                            size: 18
                        )
                    )
                    .foregroundColor(Color(hex: isSelected ? "3bb9f1" : "b0bec5"))
                    .frame(maxWidth: .infinity)
                
                Spacer()
                
                Rectangle()
                    .frame(maxWidth: .infinity)
                    .frame(height: 4)
                    .foregroundColor(Color(hex: "3bb9f1").opacity(isSelected ? 1 : 0))
            }
            .frame(height: 50)
            .contentShape(Rectangle())
        }
        .buttonStyle(PlainButtonStyle())
    }
}

#Preview {
    ChatTabView()
}