//
//  LoginView.swift
//  punchnet
//
//  Created by 安礼成 on 2026/1/15.
//

import SwiftUI
import Observation

// 登陆页面
struct LoginView: View {
    @State private var loginMode: LoginMode = .account

    enum LoginMode {
        case token
        case account
    }
    
    var body: some View {
        VStack {
            Text("PunchNet")
                .font(.system(size: 16, weight: .medium))
            
            HStack(alignment: .center, spacing: 30) {
                Button {
                    self.loginMode = .token
                } label: {
                    HStack {
                        Image("logo")
                            .resizable()
                            .clipped()
                            .frame(width: 25, height: 25)
                        
                        Text("密钥登陆")
                            .foregroundColor(self.loginMode == .token ? .blue : .black)
                    }
                    .contentShape(Rectangle())
                }
                .buttonStyle(.plain)

                Button {
                    self.loginMode = .account
                } label: {
                    HStack {
                        Image("logo")
                            .resizable()
                            .clipped()
                            .frame(width: 25, height: 25)
                        Text("账户登陆")
                            .foregroundColor(self.loginMode == .account ? .blue : .black)
                    }
                    .contentShape(Rectangle())
                }
                .buttonStyle(.plain)
            }
           
            Group {
                switch loginMode {
                case .token:
                    LoginTokenView()
                case .account:
                    LoginAccountView()
                }
            }
            
            Spacer()
        }
        .frame(width: 400, height: 400)
    }
    
}

struct LoginTokenView: View {
    @Environment(UserContext.self) var userContext: UserContext
    @State private var token: String = ""
    
    var body: some View {
        TextField("认证密钥", text: $token)
            .multilineTextAlignment(.leading)
            .textFieldStyle(PlainTextFieldStyle())
            .frame(width: 200, height: 25)
            .background(Color.clear)
            .foregroundColor(Color.black)
            .overlay(
                Rectangle()
                    .frame(height: 1)
                    .foregroundColor(.blue)
                    .padding(.top, 25)
                , alignment: .topLeading)
        
        Rectangle()
            .overlay {
                Text("登陆")
                    .font(.system(size: 14, weight: .regular))
                    .foregroundColor(.black)
            }
            .frame(width: 120, height: 35)
            .foregroundColor(Color(red: 74 / 255, green: 207 / 255, blue: 154 / 255))
            .cornerRadius(5.0)
            .onTapGesture {
                print("call me here")
            }
    }
    
}

struct LoginAccountView: View {
    @Environment(UserContext.self) var userContext: UserContext

    @State private var username: String = ""
    @State private var password: String = ""
    
    @State private var showAlert = false
    @State private var errorMessage = ""
    
    struct LoginResult: Decodable {
        var accessToken: String
        var networkId: Int
        
        enum CodingKeys: String, CodingKey {
            case accessToken = "access_token"
            case networkId = "network_id"
        }
    }

    var body: some View {
        VStack {
            TextField("手机号/邮箱", text: $username)
                .multilineTextAlignment(.leading)
                .textFieldStyle(PlainTextFieldStyle())
                .frame(width: 200, height: 25)
                .background(Color.clear)
                .foregroundColor(Color.black)
                .overlay(
                    Rectangle()
                        .frame(height: 1)
                        .foregroundColor(.blue)
                        .padding(.top, 25)
                    , alignment: .topLeading)
            
            SecureField("密码", text: $password)
                .multilineTextAlignment(.leading)
                .textFieldStyle(PlainTextFieldStyle())
                .frame(width: 200, height: 25)
                .background(Color.clear)
                .foregroundColor(Color.black)
                .overlay(
                    Rectangle()
                        .frame(height: 1)
                        .foregroundColor(.blue)
                        .padding(.top, 25)
                    , alignment: .topLeading)
            
            Button {
                if self.username.isEmpty {
                    self.showAlert = true
                    self.errorMessage = "账号不能为空"
                } else if self.password.isEmpty {
                    self.showAlert = true
                    self.errorMessage = "密码不能为空"
                } else {
                    Task {
                        await self.doLogin()
                    }
                }
            } label: {
                Text("登陆")
                    .font(.system(size: 14, weight: .regular))
                    .foregroundColor(.black)
                    .frame(width: 120, height: 35)
            }
            .frame(width: 120, height: 35)
            .background(Color(red: 74 / 255, green: 207 / 255, blue: 154 / 255))
            .cornerRadius(5.0)
        }
        .alert(isPresented: $showAlert) {
            Alert(title: Text("错误提示"), message: Text("账号密码为空"))
        }
    }
    
    // 执行登陆操作
    private func doLogin() async {
//        let clientId = SystemConfig.getClientId()
//        do {
//            let loginResult = try await SDLAPI.loginWithAccountAndPassword(clientId: clientId, username: self.username, password: self.password, as: LoginResult.self)
//            
//            print(loginResult.accessToken)
//            
//            // 保存信息到KeychainStore
//            let store = KeychainStore.shared
//            if let tokenData = loginResult.accessToken.data(using: .utf8) {
//                try store.save(tokenData, account: self.username)
//            }
//            
//            await MainActor.run {
//                self.userContext.isLogined = true
//                self.userContext.loginCredit = .accountAndPasword(account: username, password: password, networkId: loginResult.networkId)
//            }
//            
//        } catch let err as JSONRPCError {
//            await MainActor.run {
//                self.showAlert = true
//                self.errorMessage = err.message
//            }
//        } catch {
//            await MainActor.run {
//                self.showAlert = true
//                self.errorMessage = "内部错误，请稍后重试"
//            }
//        }
    }
    
}

#Preview {
    LoginView()
}