import React, { useState, useEffect } from 'react';
import { useNavigate } from 'react-router-dom';
import PageHeader from '../components/PageHeader';
import ContentGrid, { ContentItem } from '../components/ContentGrid';
import { getAllFromMyList, removeFromMyList } from '../lib/storage';
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { Plus, TrashIcon } from 'lucide-react';
import { useToast } from '@/hooks/use-toast';

interface MyListItem {
  type: 'movie' | 'tvshow';
  title: string;
  addedAt: string;
}

const MyListPage = () => {
  const [myListItems, setMyListItems] = useState<MyListItem[]>([]);
  const [showRemoveButtons, setShowRemoveButtons] = useState(false);
  const [activeTab, setActiveTab] = useState('all');
  const [isLoading, setIsLoading] = useState(true);
  const navigate = useNavigate();
  const { toast } = useToast();

  useEffect(() => {
    const fetchMyList = async () => {
      try {
        setIsLoading(true);
        const items = await getAllFromMyList();
        // Sort by most recently added
        items.sort((a, b) => new Date(b.addedAt).getTime() - new Date(a.addedAt).getTime());
        setMyListItems(items);
      } catch (error) {
        console.error("Error loading My List:", error);
      } finally {
        setIsLoading(false);
      }
    };

    fetchMyList();
  }, []);

  const handleRemoveItem = async (title: string, type: 'movie' | 'tvshow') => {
    try {
      await removeFromMyList(title, type);
      setMyListItems(prev => prev.filter(item => !(item.title === title && item.type === type)));
      toast({
        title: "Removed from My List",
        description: `"${title}" has been removed from your list`,
      });
    } catch (error) {
      console.error("Error removing item from My List:", error);
      toast({
        title: "Error",
        description: "Failed to remove item from your list",
        variant: "destructive"
      });
    }
  };

  const toggleRemoveButtons = () => {
    setShowRemoveButtons(!showRemoveButtons);
  };

  const getFilteredItems = (filter: string): ContentItem[] => {
    let filtered = myListItems;
    if (filter === 'movies') {
      filtered = myListItems.filter(item => item.type === 'movie');
    } else if (filter === 'tvshows') {
      filtered = myListItems.filter(item => item.type === 'tvshow');
    }
    
    // Convert to ContentItem format
    return filtered.map(item => ({
      type: item.type,
      title: item.title,
      image: undefined // ContentCard will fetch the image if not provided
    }));
  };

  const allItems = getFilteredItems('all');
  const movieItems = getFilteredItems('movies');
  const tvShowItems = getFilteredItems('tvshows');

  if (isLoading) {
    return (
      <div className="container mx-auto px-4 py-8 animate-pulse">
        <div className="h-8 w-1/3 bg-gray-700 rounded mb-8"></div>
        <div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-5 gap-6">
          {[...Array(10)].map((_, i) => (
            <div key={i} className="h-32 rounded bg-gray-800"></div>
          ))}
        </div>
      </div>
    );
  }

  return (
    <div className="container mx-auto px-4 py-8">
      <div className="flex justify-between items-center mb-6">
        <PageHeader 
          title="My List" 
          subtitle={`${myListItems.length} ${myListItems.length === 1 ? 'title' : 'titles'}`}
        />
        
        <div className="flex gap-4 items-center">
          {myListItems.length > 0 && (
            <button
              onClick={toggleRemoveButtons}
              className="px-4 py-2 rounded-full bg-theme-card hover:bg-theme-card-hover text-sm flex items-center gap-2"
            >
              {showRemoveButtons ? 'Done' : (
                <>
                  <TrashIcon size={16} />
                  <span className="hidden sm:inline">Edit List</span>
                </>
              )}
            </button>
          )}
          
          <button
            onClick={() => navigate('/browse')}
            className="px-4 py-2 rounded-full bg-theme-primary hover:bg-theme-primary-hover text-white text-sm flex items-center gap-2"
          >
            <Plus size={16} />
            <span className="hidden sm:inline">Add Titles</span>
          </button>
        </div>
      </div>

      {myListItems.length === 0 ? (
        <div className="flex flex-col items-center justify-center py-16 text-center">
          <div className="text-5xl mb-4">🎬</div>
          <h3 className="text-xl font-bold mb-2">Your list is empty</h3>
          <p className="text-gray-400 mb-6">Start adding movies and shows to create your watchlist.</p>
          <button
            onClick={() => navigate('/browse')}
            className="px-6 py-2 rounded bg-theme-primary hover:bg-theme-primary-hover text-white text-sm font-medium"
          >
            Browse Content
          </button>
        </div>
      ) : (
        <Tabs defaultValue={activeTab} onValueChange={setActiveTab}>
          <TabsList className="mb-8">
            <TabsTrigger value="all">All ({allItems.length})</TabsTrigger>
            <TabsTrigger value="movies">Movies ({movieItems.length})</TabsTrigger>
            <TabsTrigger value="tvshows">TV Shows ({tvShowItems.length})</TabsTrigger>
          </TabsList>
          
          <TabsContent value="all">
            <ContentGrid items={allItems} emptyMessage="No items in your list" />
          </TabsContent>
          
          <TabsContent value="movies">
            <ContentGrid items={movieItems} emptyMessage="No movies in your list" />
          </TabsContent>
          
          <TabsContent value="tvshows">
            <ContentGrid items={tvShowItems} emptyMessage="No TV shows in your list" />
          </TabsContent>
        </Tabs>
      )}
    </div>
  );
};

export default MyListPage;