import React, { useState } from "react";
import { authAPI } from "../services/api";

interface ForgotPasswordModalProps {
  show: boolean;
  onHide: () => void;
  onBackToLogin?: () => void;
}

const ForgotPasswordModal: React.FC<ForgotPasswordModalProps> = ({
  show,
  onHide,
  onBackToLogin,
}) => {
  const [email, setEmail] = useState("");
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState("");
  const [success, setSuccess] = useState(false);

  const resetModal = () => {
    setEmail("");
    setError("");
    setSuccess(false);
  };

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

    // Custom email validation to match app's error styling
    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    if (!email.trim()) {
      setError("Please enter your email address");
      return;
    }
    if (!emailRegex.test(email)) {
      setError("Please enter a valid email address");
      return;
    }

    setLoading(true);

    try {
      await authAPI.forgotPassword(email);
      setSuccess(true);
    } catch (err: any) {
      console.error('Forgot password error:', err);
      const errorData = err.response?.data;

      // Check for rate limiting
      if (err.response?.status === 429) {
        const retryAfter = errorData?.retryAfter;
        if (retryAfter) {
          const minutes = Math.ceil(retryAfter / 60);
          setError(`Too many password reset requests. Please try again in ${minutes} minute${minutes > 1 ? 's' : ''}.`);
        } else {
          setError('Too many password reset requests. Please try again later.');
        }
      } else if (errorData?.details) {
        // Validation errors
        const validationErrors = errorData.details.map((d: any) => d.message).join(', ');
        setError(validationErrors);
      } else {
        setError(errorData?.error || "Failed to send reset email. Please try again.");
      }
    } finally {
      setLoading(false);
    }
  };

  if (!show) return null;

  return (
    <>
      <div
        className="modal show d-block"
        tabIndex={-1}
        style={{ backgroundColor: "rgba(0,0,0,0.5)" }}
      >
        <div className="modal-dialog modal-dialog-centered">
          <div className="modal-content">
            <div className="modal-header border-0 pb-0">
              <button
                type="button"
                className="btn-close"
                onClick={() => {
                  resetModal();
                  onHide();
                }}
              ></button>
            </div>
            <div className="modal-body px-4 pb-4">
              {success ? (
                <>
                  <div className="text-center">
                    <i
                      className="bi bi-envelope-check text-success"
                      style={{ fontSize: "3rem" }}
                    ></i>
                    <h4 className="mt-3">Check Your Email</h4>
                    <p className="text-muted">
                      If an account exists with that email address, you will
                      receive password reset instructions shortly.
                    </p>
                    <p className="text-muted small">
                      Please check your spam folder if you don't see the email
                      within a few minutes.
                    </p>
                    <button
                      type="button"
                      className="btn btn-primary mt-3"
                      onClick={() => {
                        resetModal();
                        onHide();
                      }}
                    >
                      Close
                    </button>
                  </div>
                </>
              ) : (
                <>
                  <h4 className="text-center mb-2">Forgot Password?</h4>
                  <p className="text-center text-muted mb-4">
                    Enter your email address and we'll send you instructions to
                    reset your password.
                  </p>

                  {error && (
                    <div className="alert alert-danger" role="alert">
                      {error}
                    </div>
                  )}

                  <form onSubmit={handleSubmit}>
                    <div className="mb-3">
                      <label className="form-label">Email Address</label>
                      <input
                        type="text"
                        className="form-control"
                        value={email}
                        onChange={(e) => setEmail(e.target.value)}
                        placeholder="your@email.com"
                        autoComplete="email"
                      />
                    </div>

                    <button
                      type="submit"
                      className="btn btn-primary w-100 py-3"
                      disabled={loading || !email}
                    >
                      {loading ? "Sending..." : "Send Reset Instructions"}
                    </button>
                  </form>

                  <div className="text-center mt-3">
                    <small className="text-muted">
                      Remember your password?{" "}
                      <a
                        href="#"
                        className="text-primary text-decoration-none"
                        onClick={(e) => {
                          e.preventDefault();
                          resetModal();
                          if (onBackToLogin) {
                            onBackToLogin();
                          } else {
                            onHide();
                          }
                        }}
                      >
                        Back to Login
                      </a>
                    </small>
                  </div>
                </>
              )}
            </div>
          </div>
        </div>
      </div>
    </>
  );
};

export default ForgotPasswordModal;
