//
//  ResetPasswordView.swift
//  punchnet
//
//  Created by 安礼成 on 2026/3/9.
//
import SwiftUI

struct ResetPasswordRootView: View {
    @State private var resetPasswordModel = ResetPasswordModel()
    
    var body: some View {
        Group {
            switch resetPasswordModel.stage {
            case .requestVerifyCode:
                GetVerifyCodeView()
            case .submitVerifyCode(let username):
                SubmitVerifyCodeView(username: username)
            case .resetPassword(let username):
                ResetPasswordView(username: username)
            }
        }
        .environment(resetPasswordModel)
    }
}

// 获取验证码
struct GetVerifyCodeView: View {
    @Environment(ResetPasswordModel.self) var resetPasswordModel: ResetPasswordModel
    
    @State private var username: String = ""
    @State private var showAlert = false
    @State private var errorMessage = ""

    var body: some View {
        VStack(spacing: 30) {
            
            // 标题
            Text("重置密码")
                .font(.system(size: 18, weight: .medium))
            
            VStack(alignment: .leading, spacing: 16) {
                TextField("手机号/邮箱", text: $username)
                    .textFieldStyle(.plain)
                    .frame(width: 260, height: 28)
                    .overlay(
                        Rectangle()
                            .frame(height: 1)
                            .foregroundColor(.blue),
                        alignment: .bottom
                    )
            }
            
            Button {
                Task { @MainActor in
                    //await self.sendVerifyCode()
                    withAnimation {
                        self.resetPasswordModel.stage = .submitVerifyCode(username: self.username)
                    }
                }
            } label: {
                Text("获取验证码")
                    .font(.system(size: 14))
                    .foregroundColor(.black)
                    .frame(width: 160, height: 36)
                    .background(Color(red: 74/255, green: 207/255, blue: 154/255))
            }
            .frame(width: 160, height: 36)
            .cornerRadius(6)

            Spacer()
        }
        .padding(.top, 40)
        .frame(width: 400, height: 400)
        .alert(isPresented: $showAlert) {
            Alert(title: Text("提示"), message: Text(self.errorMessage))
        }
    }

    private func sendVerifyCode() async {
        if username.isEmpty {
            self.showAlert = true
            self.errorMessage = "手机号/邮箱为空"
            return
        }

        switch SDLUtil.identifyContact(username) {
        case .email, .phone:
            do {
                let result = try await self.resetPasswordModel.requestVerifyCode(username: username)
                print("send verify code result: \(result)")
            } catch {
                self.showAlert = true
                self.errorMessage = error.localizedDescription
            }

        case .invalid:
            self.showAlert = true
            self.errorMessage = "手机号/邮箱格式错误"
        }
    }
}

// 输入验证码
struct SubmitVerifyCodeView: View {
    @Environment(ResetPasswordModel.self) var resetPasswordModel: ResetPasswordModel

    @State var username: String
    @State private var verifiyCode: String = ""
    
    @State private var showAlert = false
    @State private var errorMessage = ""

    var body: some View {
        VStack(spacing: 30) {
            
            // 标题
            Text("重置密码")
                .font(.system(size: 18, weight: .medium))
            
            VStack(alignment: .leading, spacing: 16) {
                TextField("手机号/邮箱", text: $username)
                    .textFieldStyle(.plain)
                    .frame(width: 260, height: 28)
                    .disabled(true)
                    .overlay(
                        Rectangle()
                            .frame(height: 1)
                            .foregroundColor(.blue),
                        alignment: .bottom
                    )
                
                HStack {
                    TextField("验证码", text: $verifiyCode)
                        .textFieldStyle(.plain)
                        .frame(width: 260, height: 28)
                        .overlay(
                            Rectangle()
                                .frame(height: 1)
                                .foregroundColor(.blue),
                            alignment: .bottom
                        )
                    Spacer()
                    
                    Button {
                        Task { @MainActor in
                            //await self.sendVerifyCode()
                        }
                    } label: {
                        Text("再次获取")
                            .font(.system(size: 14))
                            .foregroundColor(.black)
                            .frame(width: 160, height: 36)
                            .background(Color(red: 74/255, green: 207/255, blue: 154/255))
                    }
                    .frame(width: 160, height: 36)
                    .cornerRadius(6)
                }
            }
            
            Button {
                Task { @MainActor in
                    await self.submitVerifyCode()
                    withAnimation {
                        self.resetPasswordModel.stage = .resetPassword(username: username)
                    }
                }
            } label: {
                Text("设置密码")
                    .font(.system(size: 14))
                    .foregroundColor(.black)
                    .frame(width: 160, height: 36)
                    .background(Color(red: 74/255, green: 207/255, blue: 154/255))
            }
            .frame(width: 160, height: 36)
            .cornerRadius(6)

            Spacer()
        }
        .padding(.top, 40)
        .frame(width: 400, height: 400)
        .alert(isPresented: $showAlert) {
            Alert(title: Text("提示"), message: Text(self.errorMessage))
        }
    }

    private func submitVerifyCode() async {
        if verifiyCode.isEmpty {
            self.showAlert = true
            self.errorMessage = "请输入验证码"
            return
        }
        
        if verifiyCode.count != 4 {
            self.showAlert = true
            self.errorMessage = "验证码错误"
            return
        }
       
        do {
            let result = try await self.resetPasswordModel.submitVerifyCode(username: username, verifyCode: verifiyCode)
            print("submit verify code result: \(result)")
        } catch {
            self.showAlert = true
            self.errorMessage = error.localizedDescription
        }
    }
    
}

// 重置密码
struct ResetPasswordView: View {
    @Environment(ResetPasswordModel.self) var resetPasswordModel: ResetPasswordModel
    
    var username: String
    
    @State private var password: String = ""
    @State private var confirmPassword: String = ""

    @State private var showAlert = false
    @State private var errorMessage = ""

    var body: some View {
        VStack(spacing: 30) {
            
            // 标题
            Text("重置密码")
                .font(.system(size: 18, weight: .medium))
            
            VStack(alignment: .leading, spacing: 16) {
                SecureField("新密码", text: $password)
                    .textFieldStyle(.plain)
                    .frame(width: 260, height: 28)
                    .overlay(
                        Rectangle()
                            .frame(height: 1)
                            .foregroundColor(.blue),
                        alignment: .bottom
                    )
                
                SecureField("再次输入密码", text: $confirmPassword)
                    .textFieldStyle(.plain)
                    .frame(width: 260, height: 28)
                    .overlay(
                        Rectangle()
                            .frame(height: 1)
                            .foregroundColor(.blue),
                        alignment: .bottom
                    )
            }
            
            Button {
                Task { @MainActor in
                    await self.resetPassword()
                }
            } label: {
                Text("保存")
                    .font(.system(size: 14))
                    .foregroundColor(.black)
                    .frame(width: 160, height: 36)
                    .background(Color(red: 74/255, green: 207/255, blue: 154/255))
            }
            .frame(width: 160, height: 36)
            .cornerRadius(6)

            Spacer()
        }
        .padding(.top, 40)
        .frame(width: 400, height: 400)
        .alert(isPresented: $showAlert) {
            Alert(title: Text("提示"), message: Text(self.errorMessage))
        }
    }

    private func resetPassword() async {
        if password.isEmpty {
            self.showAlert = true
            self.errorMessage = "请输入新密码"
            return
        }
        
        if confirmPassword.isEmpty || confirmPassword != password {
            self.showAlert = true
            self.errorMessage = "两次输入的密码不一致"
            return
        }
        
        do {
            let result = try await self.resetPasswordModel.resetPassword(username: username, password: self.password)
            print("send verify code result: \(result)")
        } catch {
            self.showAlert = true
            self.errorMessage = error.localizedDescription
        }
    }
    
}