import React, { createContext, useState, useEffect, useContext, useRef } from "react";
import Breadcrumb from "../../components/common/Breadcrumb";
import GlobalModel from "../../components/common/GlobalModel";
import ManagePaymentRequest from "../../components/PaymentRequest/ManagePaymentRequest";
import { useFab } from "../../Context/FabContext";
import PaymentRequestList from "../../components/PaymentRequest/PaymentRequestList";
import PaymentRequestFilterPanel from "../../components/PaymentRequest/PaymentRequestFilterPanel";
import { defaultPaymentRequestFilter } from "../../components/PaymentRequest/PaymentRequestSchema";
import ViewPaymentRequest from "../../components/PaymentRequest/ViewPaymentRequest";
import PreviewDocument from "../../components/Expenses/PreviewDocument";
import MakeExpense from "../../components/PaymentRequest/MakeExpense";
import handlePaymentRequestExport from "../../components/PaymentRequest/handlePaymentRequestExport";

export const PaymentRequestContext = createContext();
export const usePaymentRequestContext = () => {
  const context = useContext(PaymentRequestContext);
  if (!context) {
    throw new Error("usePaymentRequestContext must be used within PaymentRequestContext.Provider");
  }
  return context;
};

const PaymentRequestPage = () => {
  const [ManageRequest, setManageRequest] = useState({ IsOpen: null, RequestId: null });
  const [ViewRequest, setVieRequest] = useState({ view: false, requestId: null });
  const [filters, setFilters] = useState(defaultPaymentRequestFilter);
  const [filterData, setFilterdata] = useState(null);
  const [ViewDocument, setDocumentView] = useState({ IsOpen: false, Image: null });
  const [searchText, setSearchText] = useState("");
  const [isExpenseGenerate, setIsExpenseGenerate] = useState({ IsOpen: null, RequestId: null });
  const [modalSize, setModalSize] = useState("md");
  const [search, setSearch] = useState("");
  const updatedRef = useRef();
  const { setOffcanvasContent, setShowTrigger } = useFab();
  const [exportLoading, setExportLoading] = useState(false);
  const tableRef = useRef(null);
  const [filteredData, setFilteredData] = useState([]);
  const contextValue = {
    setManageRequest,
    setVieRequest,
    setDocumentView,
    setModalSize,
    setIsExpenseGenerate,
    isExpenseGenerate,
  };

  const clearFilter = () => setFilters(defaultPaymentRequestFilter);

  useEffect(() => {
    setShowTrigger(true);
    setOffcanvasContent(
      "Payment Request Filters",
      <PaymentRequestFilterPanel
        onApply={setFilters}
        ref={updatedRef}
        clearFilter={clearFilter}
        setFilterdata={setFilterdata}
      />
    );

    return () => {
      setShowTrigger(false);
      setOffcanvasContent("", null);
    };
  }, []);

  const handleRemoveChip = (key, id) => {
    setFilters((prev) => {
      const updated = { ...prev };

      if (Array.isArray(updated[key])) {
        updated[key] = updated[key].filter((v) => v !== id);
        setTimeout(() => updatedRef.current?.resetFieldValue(key, updated[key]), 0);
      } else {
        updated[key] = null;
        setTimeout(() => updatedRef.current?.resetFieldValue(key, null), 0);
      }

      return updated;
    });
  };

 const handleExport = (type) => {
    handlePaymentRequestExport(type, filters, search, tableRef, setExportLoading);
};

  return (
    <PaymentRequestContext.Provider value={contextValue}>
      <div className="container-fluid">
        {/* Breadcrumb */}
        <Breadcrumb
          data={[
            { label: "Home", link: "/dashboard" },
            { label: "Finance", link: "/Payment Request" },
            { label: "Payment Request" },
          ]}
        />

        {/* Top Bar */}
        <div className="card my-3 px-sm-4 px-0">
          <div className="card-body py-2 px-0 mx-2">
            <div className="row align-items-center">
              <div className="col-md-8 col-sm-12 mb-2 mb-md-0">
                <div className="d-flex align-items-center flex-wrap gap-0">
                  <input
                    type="search"
                    className="form-control form-control-sm w-auto"
                    placeholder="Search Payment Request"
                    value={search}
                    style={{ minWidth: "200px" }}
                    onChange={(e) => setSearch(e.target.value)}
                  />
                </div>
              </div>
              <div className="col-md-4 col-sm-12 text-md-end text-end d-flex justify-content-end align-items-center gap-0">
                <button
                  className="btn btn-sm btn-primary"
                  type="button"
                  onClick={() =>
                    setManageRequest({
                      IsOpen: true,
                      expenseId: null,
                    })
                  }
                >
                  <i className="bx bx-plus-circle me-2"></i>
                  <span className="d-none d-md-inline-block">
                    Add Payment Request
                  </span>
                </button>

                {/* 3-Dots Dropdown */}
                <div className="dropdown">
                  <button
                    className="btn btn-icon"
                    type="button"
                    data-bs-toggle="dropdown"
                    aria-expanded="false"
                  >
                    <i className="bx bx-dots-vertical-rounded bx-md"></i>
                  </button>

                  <ul className="dropdown-menu dropdown-menu-end shadow-sm" style={{ minWidth: "220px" }}>
                    <li>
                      <button className="dropdown-item" onClick={() => handleExport("print")}>
                        <i className="bx bx-printer me-2"></i> Print
                      </button>
                    </li>

                    <li><hr className="dropdown-divider" /></li>

                    <li>
                      <button className="dropdown-item" onClick={() => handleExport("csv")}>
                        <i className="bx bx-file me-2"></i> CSV
                      </button>
                    </li>

                    <li>
                      <button className="dropdown-item" onClick={() => handleExport("excel")}>
                        <i className="bx bxs-file-export me-2"></i> Excel
                      </button>
                    </li>

                    <li>
                      <button className="dropdown-item" onClick={() => handleExport("pdf")}>
                        <i className="bx bxs-file-pdf me-2"></i> PDF
                      </button>
                    </li>
                  </ul>
                </div>

              </div>

            </div>
          </div>
        </div>
        <PaymentRequestList
          search={search}
          filters={filters}
          filterData={filterData}
          removeFilterChip={handleRemoveChip}
          clearFilter={clearFilter}
          tableRef={tableRef}
          onDataFiltered={setFilteredData}
        />

        {/* Add/Edit Modal */}
        {ManageRequest.IsOpen && (
          <GlobalModel
            isOpen
            size="lg"
            closeModal={() => setManageRequest({ IsOpen: null, expenseId: null })}
          >
            <ManagePaymentRequest
              key={ManageRequest.RequestId ?? "new"}
              requestToEdit={ManageRequest.RequestId}
              closeModal={() => setManageRequest({ IsOpen: null, RequestId: null })}
            />
          </GlobalModel>
        )}

        {ViewRequest.view && (
          <GlobalModel
            isOpen
            size="xl"
            modalType="top"
            closeModal={() => setVieRequest({ requestId: null, view: false })}
          >
            <ViewPaymentRequest requestId={ViewRequest?.requestId} />
          </GlobalModel>
        )}
        {isExpenseGenerate.IsOpen && (
          <GlobalModel
            isOpen
            size="md"
            closeModal={() => setIsExpenseGenerate({ IsOpen: false, requestId: null })}
          >
            <MakeExpense
              onClose={() => setIsExpenseGenerate({ IsOpen: false, requestId: null })}
            />
          </GlobalModel>
        )}

        {ViewDocument.IsOpen && (
          <GlobalModel
            isOpen
            size="md"
            key={ViewDocument.Image ?? "doc"}
            closeModal={() => setDocumentView({ IsOpen: false, Image: null })}
          >
            <PreviewDocument imageUrl={ViewDocument.Image} />
          </GlobalModel>
        )}
      </div>
    </PaymentRequestContext.Provider>
  );
};

export default PaymentRequestPage;