"use client";

import React, { useState } from "react";
import { useRouter } from "next/navigation";
import "./AddUser.scss";
import { addUser } from "@/services/roles.services";
import { IEditUserForm } from "../User.interfaces";
import { COUNTRY_CODES } from "../constants";
import { formatPhoneDisplay, validatePhone } from "../utils";

interface AddUserFormProps {
  onSuccess?: () => void;
}

const AddUserForm: React.FC<AddUserFormProps> = ({ onSuccess }) => {
  const router = useRouter();
  const [form, setForm] = useState<IEditUserForm>({
    username: "",
    firstName: "",
    lastName: "",
    email: "",
    phone: "",
    role: "",
    merchants: [],
    groups: [],
    jobTitle: "",
  });

  const [error, setError] = useState("");
  const [loading, setLoading] = useState(false);
  const [phoneError, setPhoneError] = useState("");
  const [countryCode, setCountryCode] = useState("+1");

  const handleChange = (
    e: React.ChangeEvent<HTMLInputElement | HTMLSelectElement>
  ) => {
    const { name, value } = e.target;

    if (name === "countryCode") {
      setCountryCode(value);
      return;
    }

    // Handle array fields (merchants and groups)
    if (name === "merchants" || name === "groups") {
      if (value === "") {
        // If empty selection, set empty array
        setForm(prev => ({ ...prev, [name]: [] }));
      } else {
        // Add the selected value to the array if not already present
        setForm(prev => {
          const currentArray = prev[name as keyof IEditUserForm] as string[];
          if (!currentArray.includes(value)) {
            return { ...prev, [name]: [...currentArray, value] };
          }
          return prev;
        });
      }
    } else {
      // Handle single value fields
      setForm(prev => ({ ...prev, [name]: value }));
    }
  };

  const handleCountryCodeChange = (e: React.ChangeEvent<HTMLSelectElement>) => {
    const newCountryCode = e.target.value;
    setCountryCode(newCountryCode);

    // Re-validate phone if it exists
    if (form.phone) {
      const phoneError = validatePhone(form.phone, newCountryCode);
      setPhoneError(phoneError);
    }
  };

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();

    // Validate phone number if provided
    if (form.phone && phoneError) {
      setError("Please fix phone number errors before submitting.");
      return;
    }

    if (
      !form.firstName ||
      !form.lastName ||
      !form.email ||
      form.merchants.length === 0 ||
      form.groups.length === 0 ||
      !form.jobTitle
    ) {
      setError("Please fill in all required fields.");
      return;
    }

    try {
      setLoading(true);
      setError("");

      // Format phone number with country code before submission
      const formattedForm = {
        ...form,
        phone: form.phone ? formatPhoneDisplay(form.phone, countryCode) : "",
      };

      await addUser(formattedForm);
      if (onSuccess) onSuccess();
      router.refresh(); // <- refreshes the page (SSR re-runs)
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
    } catch (err: any) {
      setError(err.message || "Something went wrong.");
    } finally {
      setLoading(false);
    }
  };

  return (
    <form className="add-user" onSubmit={handleSubmit}>
      <input
        name="username"
        placeholder="Username"
        value={form.username}
        onChange={handleChange}
        required
      />
      <input
        name="firstName"
        placeholder="First Name"
        value={form.firstName}
        onChange={handleChange}
        required
      />
      <input
        name="lastName"
        placeholder="Last Name"
        value={form.lastName}
        onChange={handleChange}
        required
      />
      <input
        name="email"
        type="email"
        placeholder="Email"
        value={form.email}
        onChange={handleChange}
        required
      />
      <div className="array-field-container">
        <label>Merchants:</label>
        <select
          name="merchants"
          value=""
          onChange={handleChange}
          className="add-user__select"
        >
          <option value="">Select Merchant</option>
          <option value="Win Bot">Win Bot</option>
          <option value="Data Spin">Data Spin</option>
        </select>
        {form.merchants.length > 0 && (
          <div className="selected-items">
            {form.merchants.map((merchant, index) => (
              <span key={index} className="selected-item">
                {merchant}
                <button
                  type="button"
                  onClick={() => {
                    setForm(prev => ({
                      ...prev,
                      merchants: prev.merchants.filter((_, i) => i !== index),
                    }));
                  }}
                  className="remove-item"
                >
                  ×
                </button>
              </span>
            ))}
          </div>
        )}
      </div>

      <div className="array-field-container">
        <label>Groups:</label>
        <select
          name="groups"
          value=""
          onChange={handleChange}
          className="add-user__select"
        >
          <option value="">Select Group</option>
          <option value="Admin">Admin</option>
          <option value="Reader">Reader</option>
          <option value="Manager">Manager</option>
          <option value="User">User</option>
        </select>
        {form.groups.length > 0 && (
          <div className="selected-items">
            {form.groups.map((group, index) => (
              <span key={index} className="selected-item">
                {group}
                <button
                  type="button"
                  onClick={() => {
                    setForm(prev => ({
                      ...prev,
                      groups: prev.groups.filter((_, i) => i !== index),
                    }));
                  }}
                  className="remove-item"
                >
                  ×
                </button>
              </span>
            ))}
          </div>
        )}
      </div>
      <select
        name="jobTitle"
        value={form.jobTitle}
        onChange={handleChange}
        required
        className="add-user__select"
      >
        <option value="">Select Job Title</option>
        <option value="Admin">Admin</option>
        <option value="Reader">Reader</option>
        <option value="User">User</option>
        <option value="Manager">Manager</option>
        <option value="Supervisor">Supervisor</option>
        <option value="Director">Director</option>
      </select>
      <div className="phone-input-container">
        <select
          name="countryCode"
          value={countryCode}
          onChange={handleCountryCodeChange}
          className="country-code-select"
        >
          {COUNTRY_CODES.map(country => (
            <option key={country.code} value={country.code}>
              {country.flag} {country.code} {country.country}
            </option>
          ))}
        </select>
        <input
          name="phone"
          type="tel"
          placeholder="Phone number (optional)"
          value={form.phone}
          onChange={handleChange}
          className={phoneError ? "phone-input-error" : ""}
        />
      </div>

      {error && <span style={{ color: "red", width: "100%" }}>{error}</span>}
      <span
        className="phone-error-message"
        style={{
          visibility: phoneError ? "visible" : "hidden",
          color: "red",
          width: "100%",
        }}
      >
        {phoneError}
      </span>

      <div className="add-user__button-container">
        <button type="submit" disabled={loading}>
          {loading ? "Adding..." : "Add User"}
        </button>
      </div>
    </form>
  );
};

export default AddUserForm;