import React, { useState, useEffect } from "react";
import { Link, useNavigate } from "react-router-dom";
import { useAuth } from "../contexts/AuthContext";
import api from "../services/api";
import { Item, Rental } from "../types";
import { rentalAPI, conditionCheckAPI } from "../services/api";
import ReviewRenterModal from "../components/ReviewRenterModal";
import RentalCancellationModal from "../components/RentalCancellationModal";
import DeclineRentalModal from "../components/DeclineRentalModal";
import ConditionCheckModal from "../components/ConditionCheckModal";
import ReturnStatusModal from "../components/ReturnStatusModal";

const Owning: React.FC = () => {
  // Helper function to format time
  const formatTime = (timeString?: string) => {
    if (!timeString || timeString.trim() === "") return "";
    try {
      const [hour, minute] = timeString.split(":");
      const hourNum = parseInt(hour);
      const hour12 = hourNum === 0 ? 12 : hourNum > 12 ? hourNum - 12 : hourNum;
      const period = hourNum < 12 ? "AM" : "PM";
      return `${hour12}:${minute} ${period}`;
    } catch (error) {
      return "";
    }
  };

  // Helper function to format date and time together
  const formatDateTime = (dateTimeString: string) => {
    const date = new Date(dateTimeString);
    return date
      .toLocaleDateString("en-US", {
        month: "2-digit",
        day: "2-digit",
        year: "numeric",
        hour: "numeric",
        minute: "2-digit",
        hour12: true,
      })
      .replace(",", "");
  };

  const { user } = useAuth();
  const navigate = useNavigate();
  const [listings, setListings] = useState<Item[]>([]);
  const [ownerRentals, setOwnerRentals] = useState<Rental[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState("");
  // Owner rental management state
  const [showReviewRenterModal, setShowReviewRenterModal] = useState(false);
  const [selectedRentalForReview, setSelectedRentalForReview] =
    useState<Rental | null>(null);
  const [showCancelModal, setShowCancelModal] = useState(false);
  const [rentalToCancel, setRentalToCancel] = useState<Rental | null>(null);
  const [showDeclineModal, setShowDeclineModal] = useState(false);
  const [rentalToDecline, setRentalToDecline] = useState<Rental | null>(null);
  const [isProcessingPayment, setIsProcessingPayment] = useState<string>("");
  const [processingSuccess, setProcessingSuccess] = useState<string>("");
  const [showConditionCheckModal, setShowConditionCheckModal] = useState(false);
  const [conditionCheckData, setConditionCheckData] = useState<{
    rental: Rental;
    checkType: string;
  } | null>(null);
  const [availableChecks, setAvailableChecks] = useState<any[]>([]);
  const [showReturnStatusModal, setShowReturnStatusModal] = useState(false);
  const [rentalForReturn, setRentalForReturn] = useState<Rental | null>(null);

  useEffect(() => {
    fetchListings();
    fetchOwnerRentals();
    fetchAvailableChecks();
  }, [user]);

  const fetchListings = async () => {
    if (!user) return;

    try {
      setLoading(true);
      setError("");
      const response = await api.get("/items");

      // Filter items to only show ones owned by current user
      const myItems = response.data.items.filter(
        (item: Item) => item.ownerId === user.id
      );
      setListings(myItems);
    } catch (err: any) {
      console.error("Error fetching listings:", err);
      if (err.response && err.response.status >= 500) {
        setError("Failed to get your listings. Please try again later.");
      }
    } finally {
      setLoading(false);
    }
  };

  const handleDelete = async (itemId: string) => {
    if (!window.confirm("Are you sure you want to delete this listing?"))
      return;

    try {
      await api.delete(`/items/${itemId}`);
      setListings(listings.filter((item) => item.id !== itemId));
    } catch (err: any) {
      alert("Failed to delete listing");
    }
  };

  const toggleAvailability = async (item: Item) => {
    try {
      await api.put(`/items/${item.id}`, {
        ...item,
        isAvailable: !item.isAvailable,
      });
      setListings(
        listings.map((i) =>
          i.id === item.id ? { ...i, isAvailable: !i.isAvailable } : i
        )
      );
    } catch (err: any) {
      alert("Failed to update availability");
    }
  };

  const fetchOwnerRentals = async () => {
    try {
      const response = await rentalAPI.getListings();
      setOwnerRentals(response.data);
    } catch (err: any) {
      console.error("Failed to fetch owner rentals:", err);
    }
  };

  const fetchAvailableChecks = async () => {
    try {
      const response = await conditionCheckAPI.getAvailableChecks();
      const checks = Array.isArray(response.data.availableChecks)
        ? response.data.availableChecks
        : [];
      setAvailableChecks(checks);
    } catch (err: any) {
      console.error("Failed to fetch available checks:", err);
      setAvailableChecks([]);
    }
  };

  // Owner functionality handlers
  const handleAcceptRental = async (rentalId: string) => {
    try {
      setIsProcessingPayment(rentalId);
      const response = await rentalAPI.updateRentalStatus(
        rentalId,
        "confirmed"
      );

      // Check if payment processing was successful
      if (response.data.paymentStatus === "paid") {
        // Payment successful, rental confirmed
        setProcessingSuccess(rentalId);
        setTimeout(() => {
          setProcessingSuccess("");
        }, 3000);
      }

      fetchOwnerRentals();
      fetchAvailableChecks(); // Refresh available checks after rental confirmation

      // Notify Navbar to update pending count
      window.dispatchEvent(new CustomEvent("rentalStatusChanged"));
    } catch (err: any) {
      console.error("Failed to accept rental request:", err);

      // Check if it's a payment failure
      if (err.response?.data?.error?.includes("Payment failed")) {
        alert(
          `Payment failed during approval: ${
            err.response.data.details || "Unknown payment error"
          }`
        );
      } else {
        alert("Failed to accept rental request");
      }
    } finally {
      setIsProcessingPayment("");
    }
  };

  const handleDeclineClick = (rental: Rental) => {
    setRentalToDecline(rental);
    setShowDeclineModal(true);
  };

  const handleDeclineComplete = (updatedRental: Rental) => {
    // Update the rental in the owner rentals list
    setOwnerRentals((prev) =>
      prev.map((rental) =>
        rental.id === updatedRental.id ? updatedRental : rental
      )
    );
    setShowDeclineModal(false);
    setRentalToDecline(null);
  };

  const handleCompleteClick = (rental: Rental) => {
    setRentalForReturn(rental);
    setShowReturnStatusModal(true);
  };

  const handleReturnStatusMarked = async (updatedRental: Rental) => {
    // Update the rental in the list
    setOwnerRentals((prev) =>
      prev.map((rental) =>
        rental.id === updatedRental.id ? updatedRental : rental
      )
    );

    // Close the return status modal
    setShowReturnStatusModal(false);
    setRentalForReturn(null);

    // Show review modal (rental is already marked as completed by return status endpoint)
    setSelectedRentalForReview(updatedRental);
    setShowReviewRenterModal(true);
    fetchOwnerRentals();
  };

  const handleReviewRenterSuccess = () => {
    fetchOwnerRentals();
  };

  const handleCancelClick = (rental: Rental) => {
    setRentalToCancel(rental);
    setShowCancelModal(true);
  };

  const handleCancellationComplete = (updatedRental: Rental) => {
    // Update the rental in the owner rentals list
    setOwnerRentals((prev) =>
      prev.map((rental) =>
        rental.id === updatedRental.id ? updatedRental : rental
      )
    );
    setShowCancelModal(false);
    setRentalToCancel(null);
  };

  const handleConditionCheck = (rental: Rental, checkType: string) => {
    setConditionCheckData({ rental, checkType });
    setShowConditionCheckModal(true);
  };

  const handleConditionCheckSuccess = () => {
    fetchAvailableChecks();
    alert("Condition check submitted successfully!");
  };

  const getAvailableChecksForRental = (rentalId: string) => {
    if (!Array.isArray(availableChecks)) return [];
    return availableChecks.filter(
      (check) =>
        check.rentalId === rentalId && check.checkType === "pre_rental_owner" // Only pre-rental; post-rental is in return modal
    );
  };

  // Filter owner rentals - exclude cancelled (shown in Rental History)
  const allOwnerRentals = ownerRentals
    .filter((r) => ["pending", "confirmed", "active"].includes(r.status))
    .sort((a, b) => {
      const statusOrder = { pending: 0, confirmed: 1, active: 2 };
      return (
        statusOrder[a.status as keyof typeof statusOrder] -
        statusOrder[b.status as keyof typeof statusOrder]
      );
    });

  if (loading) {
    return (
      <div className="container mt-4">
        <div className="text-center">
          <div className="spinner-border" role="status">
            <span className="visually-hidden">Loading...</span>
          </div>
        </div>
      </div>
    );
  }

  return (
    <div className="container mt-4">
      <h1 className="mb-4">Owning</h1>

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

      {/* Rental Requests Section - Moved to top for priority */}
      {allOwnerRentals.length > 0 && (
        <div className="mb-5">
          <h4 className="mb-3">
            <i className="bi bi-calendar-check me-2"></i>
            Rentals
          </h4>
          <div className="row">
            {allOwnerRentals.map((rental) => (
              <div key={rental.id} className="col-md-6 col-lg-4 mb-4">
                <div className="card h-100">
                  {rental.item?.imageFilenames && rental.item.imageFilenames[0] && (
                    <img
                      src={rental.item.imageFilenames[0]}
                      className="card-img-top"
                      alt={rental.item.name}
                      style={{ height: "200px", objectFit: "cover" }}
                    />
                  )}
                  <div className="card-body">
                    <h5 className="card-title text-dark">
                      {rental.item ? rental.item.name : "Item Unavailable"}
                    </h5>

                    {rental.renter && (
                      <p className="mb-1 text-dark small">
                        <strong>Renter:</strong>{" "}
                        <span
                          onClick={() => navigate(`/users/${rental.renterId}`)}
                          style={{ cursor: "pointer" }}
                        >
                          {rental.renter.firstName} {rental.renter.lastName}
                        </span>
                      </p>
                    )}

                    <div className="mb-2">
                      <span
                        className={`badge ${
                          rental.status === "active"
                            ? "bg-success"
                            : rental.status === "pending"
                            ? "bg-warning"
                            : rental.status === "confirmed"
                            ? "bg-info"
                            : "bg-danger"
                        }`}
                      >
                        {rental.status.charAt(0).toUpperCase() +
                          rental.status.slice(1)}
                      </span>
                    </div>

                    <p className="mb-1 text-dark small">
                      <strong>Period:</strong>
                      <br />
                      {formatDateTime(rental.startDateTime)} -{" "}
                      {formatDateTime(rental.endDateTime)}
                    </p>

                    <p className="mb-1 text-dark small">
                      <strong>Total:</strong> ${rental.totalAmount}
                    </p>

                    {rental.intendedUse && rental.status === "pending" && (
                      <div className="alert alert-light mt-2 mb-2 p-2 small">
                        <strong>Intended Use:</strong>
                        <br />
                        {rental.intendedUse}
                      </div>
                    )}

                    {rental.status === "cancelled" &&
                      rental.refundAmount !== undefined && (
                        <div className="alert alert-info mt-2 mb-2 p-2 small">
                          <strong>
                            <i className="bi bi-arrow-return-left me-1"></i>
                            Refund:
                          </strong>{" "}
                          ${Number(rental.refundAmount || 0).toFixed(2)}
                          {rental.refundProcessedAt && (
                            <small className="d-block text-muted mt-1">
                              Processed:{" "}
                              {new Date(
                                rental.refundProcessedAt
                              ).toLocaleDateString()}
                            </small>
                          )}
                          {rental.refundReason && (
                            <small className="d-block mt-1">
                              {rental.refundReason}
                            </small>
                          )}
                          {rental.cancelledBy && (
                            <small className="d-block text-muted mt-1">
                              Cancelled by: {rental.cancelledBy}
                            </small>
                          )}
                        </div>
                      )}

                    {rental.itemPrivateMessage && rental.itemReviewVisible && (
                      <div className="alert alert-info mt-2 mb-2 p-2 small">
                        <strong>
                          <i className="bi bi-envelope-fill me-1"></i>Private
                          Note from Renter:
                        </strong>
                        <br />
                        {rental.itemPrivateMessage}
                      </div>
                    )}

                    <div className="d-flex flex-column gap-2 mt-3">
                      <div className="d-flex gap-2">
                        {rental.status === "pending" && (
                          <>
                            <button
                              className="btn btn-sm btn-success"
                              onClick={() => handleAcceptRental(rental.id)}
                              disabled={isProcessingPayment === rental.id}
                            >
                              {isProcessingPayment === rental.id ? (
                                <>
                                  <div
                                    className="spinner-border spinner-border-sm me-2"
                                    role="status"
                                  >
                                    <span className="visually-hidden">
                                      Loading...
                                    </span>
                                  </div>
                                  Confirming...
                                </>
                              ) : processingSuccess === rental.id ? (
                                <>
                                  <i className="bi bi-check-circle me-1"></i>
                                  Confirmed!
                                </>
                              ) : (
                                "Accept"
                              )}
                            </button>
                            <button
                              className="btn btn-sm btn-danger"
                              onClick={() => handleDeclineClick(rental)}
                            >
                              Decline
                            </button>
                          </>
                        )}
                        {rental.status === "confirmed" && (
                          <>
                            <button
                              className="btn btn-sm btn-success"
                              onClick={() => handleCompleteClick(rental)}
                            >
                              Complete
                            </button>
                            <button
                              className="btn btn-sm btn-outline-danger"
                              onClick={() => handleCancelClick(rental)}
                            >
                              Cancel
                            </button>
                          </>
                        )}
                        {rental.status === "active" && (
                          <button
                            className="btn btn-sm btn-success"
                            onClick={() => handleCompleteClick(rental)}
                          >
                            Complete
                          </button>
                        )}
                      </div>

                      {/* Condition Check Buttons */}
                      {getAvailableChecksForRental(rental.id).map((check) => (
                        <button
                          key={`${rental.id}-${check.checkType}`}
                          className="btn btn-sm btn-outline-primary"
                          onClick={() =>
                            handleConditionCheck(rental, check.checkType)
                          }
                        >
                          <i className="bi bi-camera me-2" />
                          {check.checkType === "pre_rental_owner"
                            ? "Submit Pre-Rental Check"
                            : "Submit Post-Rental Check"}
                        </button>
                      ))}
                    </div>
                  </div>
                </div>
              </div>
            ))}
          </div>
        </div>
      )}

      <div className="d-flex justify-content-between align-items-center mb-3">
        <h4 className="mb-0">
          <i className="bi bi-list-ul me-2"></i>
          Listings
        </h4>
        <Link to="/create-item" className="btn btn-primary">
          Add New Item
        </Link>
      </div>

      {listings.length === 0 ? (
        <div className="text-center py-5">
          <p className="text-muted">You haven't listed any items yet.</p>
          <Link to="/create-item" className="btn btn-primary mt-3">
            List Your First Item
          </Link>
        </div>
      ) : (
        <div className="row">
          {listings.map((item) => (
            <div key={item.id} className="col-md-6 col-lg-4 mb-4">
              <div
                className="card h-100"
                style={{ cursor: "pointer" }}
                onClick={(e: React.MouseEvent<HTMLDivElement>) => {
                  const target = e.target as HTMLElement;
                  if (target.closest("button") || target.closest("a")) {
                    return;
                  }
                  navigate(`/items/${item.id}`);
                }}
              >
                {item.imageFilenames && item.imageFilenames[0] && (
                  <img
                    src={item.imageFilenames[0]}
                    className="card-img-top"
                    alt={item.name}
                    style={{ height: "200px", objectFit: "cover" }}
                  />
                )}
                <div className="card-body">
                  <h5 className="card-title text-dark">{item.name}</h5>
                  <p className="card-text text-truncate text-dark">
                    {item.description}
                  </p>

                  <div className="mb-2 d-flex gap-2 flex-wrap">
                    <span
                      className={`badge ${
                        item.isAvailable ? "bg-success" : "bg-secondary"
                      }`}
                    >
                      {item.isAvailable ? "Available" : "Not Available"}
                    </span>
                    {item.isDeleted && (
                      <span className="badge bg-danger">
                        <i className="bi bi-exclamation-triangle-fill me-1"></i>
                        Deleted by Admin
                      </span>
                    )}
                  </div>

                  <div className="mb-3">
                    {(() => {
                      const hasAnyPositivePrice =
                        (item.pricePerHour !== undefined &&
                          Number(item.pricePerHour) > 0) ||
                        (item.pricePerDay !== undefined &&
                          Number(item.pricePerDay) > 0) ||
                        (item.pricePerWeek !== undefined &&
                          Number(item.pricePerWeek) > 0) ||
                        (item.pricePerMonth !== undefined &&
                          Number(item.pricePerMonth) > 0);

                      const hasAnyZeroPrice =
                        (item.pricePerHour !== undefined &&
                          Number(item.pricePerHour) === 0) ||
                        (item.pricePerDay !== undefined &&
                          Number(item.pricePerDay) === 0) ||
                        (item.pricePerWeek !== undefined &&
                          Number(item.pricePerWeek) === 0) ||
                        (item.pricePerMonth !== undefined &&
                          Number(item.pricePerMonth) === 0);

                      if (!hasAnyPositivePrice && hasAnyZeroPrice) {
                        return (
                          <div className="text-success small fw-bold">
                            Free to Borrow
                          </div>
                        );
                      }

                      return (
                        <>
                          {item.pricePerDay && Number(item.pricePerDay) > 0 && (
                            <div className="text-muted small">
                              ${item.pricePerDay}/day
                            </div>
                          )}
                          {item.pricePerHour &&
                            Number(item.pricePerHour) > 0 && (
                              <div className="text-muted small">
                                ${item.pricePerHour}/hour
                              </div>
                            )}
                          {item.pricePerWeek &&
                            Number(item.pricePerWeek) > 0 && (
                              <div className="text-muted small">
                                ${item.pricePerWeek}/week
                              </div>
                            )}
                          {item.pricePerMonth &&
                            Number(item.pricePerMonth) > 0 && (
                              <div className="text-muted small">
                                ${item.pricePerMonth}/month
                              </div>
                            )}
                        </>
                      );
                    })()}
                  </div>

                  <div className="d-flex gap-2">
                    <Link
                      to={`/items/${item.id}/edit`}
                      className="btn btn-sm btn-outline-primary"
                    >
                      Edit
                    </Link>
                    <button
                      onClick={() => toggleAvailability(item)}
                      className="btn btn-sm btn-outline-info"
                    >
                      {item.isAvailable ? "Mark Unavailable" : "Mark Available"}
                    </button>
                    <button
                      onClick={() => handleDelete(item.id)}
                      className="btn btn-sm btn-outline-danger"
                    >
                      Delete
                    </button>
                  </div>
                </div>
              </div>
            </div>
          ))}
        </div>
      )}

      {/* Review Modal */}
      {selectedRentalForReview && (
        <ReviewRenterModal
          show={showReviewRenterModal}
          onClose={() => {
            setShowReviewRenterModal(false);
            setSelectedRentalForReview(null);
          }}
          rental={selectedRentalForReview}
          onSuccess={handleReviewRenterSuccess}
        />
      )}

      {/* Cancellation Modal */}
      {rentalToCancel && (
        <RentalCancellationModal
          show={showCancelModal}
          onHide={() => {
            setShowCancelModal(false);
            setRentalToCancel(null);
          }}
          rental={rentalToCancel}
          onCancellationComplete={handleCancellationComplete}
        />
      )}

      {/* Decline Modal */}
      {rentalToDecline && (
        <DeclineRentalModal
          show={showDeclineModal}
          onHide={() => {
            setShowDeclineModal(false);
            setRentalToDecline(null);
          }}
          rental={rentalToDecline}
          onDeclineComplete={handleDeclineComplete}
        />
      )}

      {/* Condition Check Modal */}
      {conditionCheckData && (
        <ConditionCheckModal
          show={showConditionCheckModal}
          onHide={() => {
            setShowConditionCheckModal(false);
            setConditionCheckData(null);
          }}
          rentalId={conditionCheckData.rental.id}
          checkType={conditionCheckData.checkType}
          itemName={conditionCheckData.rental.item?.name || "Item"}
          onSuccess={handleConditionCheckSuccess}
        />
      )}

      {/* Return Status Modal */}
      {rentalForReturn && (
        <ReturnStatusModal
          show={showReturnStatusModal}
          onHide={() => {
            setShowReturnStatusModal(false);
            setRentalForReturn(null);
          }}
          rental={rentalForReturn}
          onReturnMarked={handleReturnStatusMarked}
          onSubmitSuccess={handleReturnStatusMarked}
        />
      )}
    </div>
  );
};

export default Owning;