import React, { useState, useEffect } from "react";
import GameDataManager from "../../../services/GameDataManager.js";
import "./styles/ItemListTab.css";

const ItemListTab = () => {
  const [allItems, setAllItems] = useState([]);
  const [filteredItems, setFilteredItems] = useState([]);
  const [searchQuery, setSearchQuery] = useState("");
  const [selectedCategory, setSelectedCategory] = useState("all");
  const [selectedItem, setSelectedItem] = useState(null);
  const [isMobile, setIsMobile] = useState(window.innerWidth <= 768);

  const ASSET_BASE_URL = "http://localhost:5003/static/";

  useEffect(() => {
    const handleResize = () => setIsMobile(window.innerWidth <= 768);
    window.addEventListener("resize", handleResize);

    const itemsArray = Array.from(GameDataManager.items.keys()).map((id) =>
      GameDataManager.getItem(id),
    );
    setAllItems(itemsArray);
    setFilteredItems(itemsArray);

    return () => window.removeEventListener("resize", handleResize);
  }, []);

  useEffect(() => {
    let result = allItems;
    if (selectedCategory !== "all") {
      result = result.filter(
        (item) => item.meta?.category === selectedCategory,
      );
    }
    if (searchQuery) {
      const q = searchQuery.toLowerCase();
      result = result.filter(
        (item) =>
          item.displayName.toLowerCase().includes(q) ||
          item.id.toLowerCase().includes(q),
      );
    }
    setFilteredItems(result);
  }, [searchQuery, selectedCategory, allItems]);

  const getFullTextureUrl = (path) => {
    if (!path) return "/assets/no-image.png";
    return path.startsWith("http") ? path : `${ASSET_BASE_URL}${path}`;
  };

  const categories = [
    "all",
    ...new Set(allItems.map((i) => i.meta?.category).filter(Boolean)),
  ];

  const renderInspector = () => (
    <div
      className={`item-inspector ${isMobile && selectedItem ? "mobile-modal" : ""}`}
      onClick={() => isMobile && setSelectedItem(null)}
    >
      {selectedItem && (
        <div className="inspector-content" onClick={(e) => e.stopPropagation()}>
          {isMobile && (
            <button
              className="close-inspector"
              onClick={() => setSelectedItem(null)}
            >
              &times;
            </button>
          )}

          <div className={`inspector-header ${selectedItem.meta?.rarity}`}>
            <div className="header-visual">
              <img src={getFullTextureUrl(selectedItem.texture)} alt="" />
            </div>
            <div className="header-info">
              <div className="id-tag">{selectedItem.id}</div>
              <h1>{selectedItem.displayName}</h1>
              <span className="rarity-label">
                {selectedItem.meta?.rarity?.toUpperCase()}
              </span>
            </div>
          </div>

          <div className="inspector-grid">
            <div className="inspector-section">
              <div className="section-title">DATA_DESCRIPTION</div>
              <p>{selectedItem.description}</p>
            </div>

            {selectedItem.stats &&
              Object.keys(selectedItem.stats).length > 0 && (
                <div className="inspector-section">
                  <div className="section-title">PARAMETER_READOUT</div>
                  <div className="stat-pills">
                    {Object.entries(selectedItem.stats).map(([k, v]) => (
                      <div key={k} className="stat-pill">
                        <span>{GameDataManager.getStatName(k)}</span>
                        <span>+{v}</span>
                      </div>
                    ))}
                  </div>
                </div>
              )}
          </div>
        </div>
      )}
    </div>
  );

  return (
    <div className="item-list-container">
      <div className="item-list-sidebar">
        <div className="search-box">
          <input
            type="text"
            placeholder="SEARCH_ID_OR_NAME..."
            value={searchQuery}
            onChange={(e) => setSearchQuery(e.target.value)}
          />
        </div>
        <div className="category-filters">
          {categories.map((cat) => (
            <button
              key={cat}
              className={`filter-btn ${selectedCategory === cat ? "active" : ""}`}
              onClick={() => setSelectedCategory(cat)}
            >
              {cat.toUpperCase()}
            </button>
          ))}
        </div>
        <div className="items-list-scroll">
          {filteredItems.map((item) => (
            <div
              key={item.id}
              className={`item-row ${selectedItem?.id === item.id ? "selected" : ""} ${item.meta?.rarity}`}
              onClick={() => setSelectedItem(item)}
            >
              <div className="item-row-icon">
                <img src={getFullTextureUrl(item.texture)} alt="" />
              </div>
              <div className="item-row-content">
                <div className="item-row-title">{item.displayName}</div>
                <div className="item-row-subtitle">{item.id}</div>
              </div>
            </div>
          ))}
        </div>
      </div>
      {(!isMobile || (isMobile && selectedItem)) && renderInspector()}
    </div>
  );
};

export default ItemListTab;
