package com.demo.action;

import com.opensymphony.xwork2.ActionSupport;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class LoginAction extends ActionSupport {

    private static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

    private String username;
    private String password;
    private String displayName;
    private String role;
    private String loginTime;
    private String recommendation;

    @Override
    public String execute() {
        username = normalize(username);
        password = normalize(password);

        if (!hasSubmitted()) {
            return INPUT;
        }

        if ("admin".equals(username) && "123456".equals(password)) {
            displayName = "System Demo Admin";
            role = "Administrator";
            loginTime = LocalDateTime.now().format(TIME_FORMATTER);
            recommendation = "Continue with the user form, validation sample, or upload flow to explore the rest of the demo.";
            return SUCCESS;
        }

        addActionError("Invalid demo credentials. Use admin / 123456.");
        return INPUT;
    }

    @Override
    public void validate() {
        if (!hasSubmitted()) {
            return;
        }
        if (username == null || username.length() < 3) {
            addFieldError("username", "Username must be at least 3 characters.");
        }
        if (password == null || password.length() < 6) {
            addFieldError("password", "Password must be at least 6 characters.");
        }
    }

    private boolean hasSubmitted() {
        return (username != null && !username.trim().isEmpty())
            || (password != null && !password.trim().isEmpty());
    }

    private String normalize(String value) {
        return value == null ? null : value.trim();
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getDisplayName() {
        return displayName;
    }

    public String getRole() {
        return role;
    }

    public String getLoginTime() {
        return loginTime;
    }

    public String getRecommendation() {
        return recommendation;
    }
}