import { useState } from 'react';

import { contactApi, CreateContactRequest } from '../api/contactApi';
import { tokenService } from '../services/TokenService';
import { DATA_KEY_ADDED_CONTACT_ID } from '../constants/app';

import './AddContact.css';

const AddContact = ({ isOpen, onClose, onSuccess }) => {
  const [formData, setFormData] = useState({
    phoneNumber: '',
    firstName: '',
    lastName: '',
  });
  const [errors, setErrors] = useState({});
  const [isSubmitting, setIsSubmitting] = useState(false);
  const [submitError, setSubmitError] = useState('');

  if (!isOpen) return null;

  const handleChange = (e) => {
    const { name, value } = e.target;
    setFormData((prev) => ({
      ...prev,
      [name]: value,
    }));
    // Clear error when user starts typing
    if (errors[name]) {
      setErrors((prev) => ({
        ...prev,
        [name]: '',
      }));
    }
    // Clear submit error when user modifies form
    if (submitError) {
      setSubmitError('');
    }
  };

  const validateForm = () => {
    const newErrors = {};

    // Phone number is required
    if (!formData.phoneNumber.trim()) {
      newErrors.phoneNumber = 'Phone number is required';
    } else if (!/^[\d\s\-\+\(\)]{10,}$/.test(formData.phoneNumber)) {
      newErrors.phoneNumber = 'Please enter a valid phone number';
    }

    return newErrors;
  };

  const handleSubmit = async (e) => {
    e.preventDefault();
    const validationErrors = validateForm();

    if (Object.keys(validationErrors).length > 0) {
      setErrors(validationErrors);
      return;
    }

    setIsSubmitting(true);
    setSubmitError('');

    try {
      const userId = tokenService.getUserId();
      let contact = new CreateContactRequest();
      contact.phone_number = formData.phoneNumber;
      contact.first_name = formData.firstName;
      contact.last_name = formData.lastName;
      contact.user_id = userId;
      const result = await contactApi.createContact(
        contact,
        tokenService.bearerToken()
      );
      if (result.data.length > 0) {
        console.log('Contact added');
        const contactId = result.data[0].id;
        localStorage.setItem(DATA_KEY_ADDED_CONTACT_ID, contactId);
      }

      // Reset form
      setFormData({ phoneNumber: '', firstName: '', lastName: '' });

      // Call onSuccess callback if provided
      if (onSuccess) {
        onSuccess(result);
      }

      // Close the modal
      onClose();
    } catch (error) {
      console.error('Error submitting form:', error);
      setSubmitError(
        error.message || 'Failed to create contact. Please try again.'
      );
    } finally {
      setIsSubmitting(false);
    }
  };

  const handleCancel = () => {
    setFormData({ phoneNumber: '', firstName: '', lastName: '' });
    setErrors({});
    setSubmitError('');
    onClose();
  };

  return (
    <div className="contact-modal-overlay">
      <div className="contact-modal">
        <div className="contact-header">
          <h2 className="contact-title">Add New Contact</h2>
          <button
            className="close-btn"
            onClick={handleCancel}
            aria-label="Close"
          >
            ×
          </button>
        </div>

        <div className="contact-card">
          {submitError && <div className="submit-error">{submitError}</div>}

          <form className="contact-form" onSubmit={handleSubmit}>
            <div className="form-group">
              <label htmlFor="phoneNumber" className="form-label">
                Phone Number <span className="required">*</span>
              </label>
              <input
                id="phoneNumber"
                name="phoneNumber"
                type="tel"
                className={`form-input ${errors.phoneNumber ? 'error' : ''}`}
                value={formData.phoneNumber}
                onChange={handleChange}
                placeholder="Enter phone number"
                disabled={isSubmitting}
                required
              />
              {errors.phoneNumber && (
                <span className="error-message">{errors.phoneNumber}</span>
              )}
            </div>

            <div className="form-group">
              <label htmlFor="firstName" className="form-label">
                First Name
              </label>
              <input
                id="firstName"
                name="firstName"
                type="text"
                className="form-input"
                value={formData.firstName}
                onChange={handleChange}
                placeholder="Enter first name (optional)"
                disabled={isSubmitting}
              />
              <span className="form-hint">Optional field</span>
            </div>

            <div className="form-group">
              <label htmlFor="lastName" className="form-label">
                Last Name
              </label>
              <input
                id="lastName"
                name="lastName"
                type="text"
                className="form-input"
                value={formData.lastName}
                onChange={handleChange}
                placeholder="Enter last name (optional)"
                disabled={isSubmitting}
              />
              <span className="form-hint">Optional field</span>
            </div>

            <div className="form-actions">
              <button
                type="button"
                className="cancel-btn"
                onClick={handleCancel}
                disabled={isSubmitting}
              >
                Cancel
              </button>
              <button
                type="submit"
                className="submit-btn"
                disabled={isSubmitting}
              >
                {isSubmitting ? 'Creating...' : 'Create Contact'}
              </button>
            </div>
          </form>
        </div>
      </div>
    </div>
  );
};

export default AddContact;