// src/components/Resources/Resources.jsx
import React, { useState, useEffect, useMemo } from 'react';
import './Resources.css';
import ResourceLoader from './ResourceLoader';
import { supabase } from '../../lib/supabase';

const Resources = () => {
  // State management
  const [resources, setResources] = useState([]);
  const [activeCategory, setActiveCategory] = useState('All');
  const [searchQuery, setSearchQuery] = useState('');
  const [showNewOnly, setShowNewOnly] = useState(false);
  const [showScoreImpactOnly, setShowScoreImpactOnly] = useState(false);
  const [isLoading, setIsLoading] = useState(true);
  // Add a new state to store category emojis from database
  const [categoryEmojis, setCategoryEmojis] = useState({
    'All': '🗃️' // Default emoji for 'All'
  });
  // New state for random resources
  const [randomResources, setRandomResources] = useState([]);
  const [showRandomResources, setShowRandomResources] = useState(false);

  // Load saved user preferences from localStorage
  useEffect(() => {
    const savedPreferences = localStorage.getItem('resourcesPreferences');
    if (savedPreferences) {
      try {
        const preferences = JSON.parse(savedPreferences);
        setActiveCategory(preferences.activeCategory || 'All');
        setShowNewOnly(preferences.showNewOnly || false);
        setShowScoreImpactOnly(preferences.showScoreImpactOnly || false);
      } catch (error) {
        console.error('Error loading preferences:', error);
      }
    }
  }, []);

  // Save user preferences to localStorage
  useEffect(() => {
    const preferences = {
      activeCategory,
      showNewOnly,
      showScoreImpactOnly
    };
    localStorage.setItem('resourcesPreferences', JSON.stringify(preferences));
  }, [activeCategory, showNewOnly, showScoreImpactOnly]);

  // Hide random resources when filters are applied
  useEffect(() => {
    // Hide random resources when any filter is active or category is not 'All'
    if (showNewOnly || showScoreImpactOnly || activeCategory !== 'All' || searchQuery.trim() !== '') {
      setShowRandomResources(false);
    }
  }, [showNewOnly, showScoreImpactOnly, activeCategory, searchQuery]);

  // Fetch resources from Supabase
  useEffect(() => {
    async function fetchResources() {
      setIsLoading(true);
      try {
        // Fetch only published resources
        const { data: resourcesData, error: resourcesError } = await supabase
          .from('resources')
          .select('*')
          .eq('status', 'published')  // Only select resources with 'published' status
          .order('position');
  
        if (resourcesError) {
          throw resourcesError;
        }
  
        // Rest of your existing fetching code continues as before...
        // Then fetch the categories for each resource using the junction table
        const { data: resourceCategories, error: categoriesError } = await supabase
          .from('resource_categories')
          .select(`
            resource_id,
            category:categories(id, name, emoji)
          `);
  
        if (categoriesError) {
          throw categoriesError;
        }
  
        // Fetch all categories to build the emoji mapping
        const { data: allCategories, error: allCategoriesError } = await supabase
          .from('categories')
          .select('name, emoji');
  
        if (allCategoriesError) {
          throw allCategoriesError;
        }
  
        // Build category emojis mapping
        const emojisMap = { 'All': '🗃️' }; // Default for 'All'
        allCategories.forEach(category => {
          emojisMap[category.name] = category.emoji || '❓'; // Fallback emoji if none in DB
        });
        setCategoryEmojis(emojisMap);
  
        // Then fetch the tags for each resource
        const { data: resourceTags, error: tagsError } = await supabase
          .from('resource_tags')
          .select(`
            resource_id,
            tag:tags(id, name)
          `);
  
        if (tagsError) {
          throw tagsError;
        }
  
        // Group categories by resource_id
        const categoriesByResource = {};
        resourceCategories.forEach(item => {
          if (!categoriesByResource[item.resource_id]) {
            categoriesByResource[item.resource_id] = [];
          }
          categoriesByResource[item.resource_id].push({
            id: item.category.id,
            name: item.category.name,
            emoji: item.category.emoji || '❓' // Fallback emoji if none in DB
          });
        });
  
        // Group tags by resource_id
        const tagsByResource = {};
        resourceTags.forEach(item => {
          if (!tagsByResource[item.resource_id]) {
            tagsByResource[item.resource_id] = [];
          }
          tagsByResource[item.resource_id].push({
            id: item.tag.id,
            name: item.tag.name
          });
        });
  
        // Transform data to match the expected format
        const formattedResources = resourcesData.map(resource => {
          // Get categories for this resource
          const resourceCategoryList = categoriesByResource[resource.id] || [];
          // Get tags for this resource
          const resourceTagList = tagsByResource[resource.id] || [];
          
          return {
            ...resource,
            // Primary category for backwards compatibility (use first category if available)
            category: resourceCategoryList.length > 0 ? resourceCategoryList[0].name : 'Misc',
            // Store all categories
            categories: resourceCategoryList,
            // Store all tags
            tags: resourceTagList,
            emoji: resourceCategoryList.length > 0 ? resourceCategoryList[0].emoji : '🔮',
            url: addUTMParameters(resource.url)
          };
        });
  
        setResources(formattedResources);
      } catch (error) {
        console.error('Error fetching resources:', error);
        // In case of error, we could use local data as fallback
      } finally {
        setIsLoading(false);
      }
    }
  
    fetchResources();
  }, []);

// Check if a resource is new (added in the last 14 days)
// but exclude resources created on February 27, 2025
const isNewResource = (date) => {
  if (!date) return false;
  
  const resourceDate = new Date(date);
  
  // Check if the resource was created on February 27, 2025
  // We need to use UTC methods to avoid timezone issues with database timestamps
  const isFeb27 = resourceDate.getUTCFullYear() === 2025 && 
                 resourceDate.getUTCMonth() === 1 && // February is month 1 (0-indexed)
                 resourceDate.getUTCDate() === 27;
  
  // If it was created on Feb 27, 2025, don't mark it as new
  if (isFeb27) {
    return false;
  }
  
  // Otherwise, apply the normal 14-day rule
  const now = new Date();
  const daysDiff = Math.floor((now - resourceDate) / (1000 * 60 * 60 * 24));
  return daysDiff < 14;
};

  // Check if a resource impacts score
  const impactsScore = (resource) => {
    if (!resource.tags) return false;
    return resource.tags.some(tag => tag.name.toLowerCase() === 'score');
  };

  // Add UTM parameters to URLs
  const addUTMParameters = (url) => {
    const separator = url.includes('?') ? '&' : '?';
    return `${url}${separator}utm_source=cred.blue&utm_medium=resources&utm_campaign=tools_directory`;
  };

  // Function to share the resources page on Bluesky
  const shareOnBluesky = () => {
    const shareText = `Check out this collection of Bluesky + ATProto resources curated by @cred.blue! 🔧🦋\n\nFind lexicons, alternative clients, and much more to enhance your Bluesky experience.\n\nExplore the library: https://cred.blue/resources`;
    
    window.open(
      `https://bsky.app/intent/compose?text=${encodeURIComponent(shareText)}`,
      '_blank'
    );
  };

  // Get 4 random resources from the full resource list
  const getRandomResources = () => {
    // Filter out any resources that might not have essential data
    const validResources = resources.filter(r => r.name && r.description);
    
    if (validResources.length <= 6) {
      setRandomResources(validResources);
      return;
    }
    
    // Create a copy of the array to avoid mutating the original
    const shuffled = [...validResources];
    
    // Fisher-Yates shuffle algorithm
    for (let i = shuffled.length - 1; i > 0; i--) {
      const j = Math.floor(Math.random() * (i + 1));
      [shuffled[i], shuffled[j]] = [shuffled[j], shuffled[i]];
    }
    
    // Take the first 6 items
    setRandomResources(shuffled.slice(0, 6));
    setShowRandomResources(true);
    
    // Reset all filters when showing random resources
    if (activeCategory !== 'All' || showNewOnly || showScoreImpactOnly || searchQuery.trim() !== '') {
      setActiveCategory('All');
      setShowNewOnly(false);
      setShowScoreImpactOnly(false);
      setSearchQuery('');
    }
    
    // Auto-scroll to the random resources section
    setTimeout(() => {
      const element = document.getElementById('random-resources-section');
      if (element) {
        element.scrollIntoView({ behavior: 'smooth' });
      }
    }, 100);
  };

  // Get all categories from resources
  const categories = useMemo(() => {
    if (resources.length === 0) return ['All'];
    
    // Extract all unique categories from all resources
    const allCategories = new Set();
    resources.forEach(resource => {
      if (resource.categories && resource.categories.length > 0) {
        resource.categories.forEach(cat => allCategories.add(cat.name));
      }
    });
    
    return ['All', ...Array.from(allCategories).sort()];
  }, [resources]);
  
  // Count resources per category
  const categoryCounts = useMemo(() => {
    const counts = { 'All': resources.length };
    
    resources.forEach(resource => {
      if (resource.categories && resource.categories.length > 0) {
        resource.categories.forEach(category => {
          counts[category.name] = (counts[category.name] || 0) + 1;
        });
      }
    });
    
    return counts;
  }, [resources]);

  // Check if a resource belongs to a category
  const resourceHasCategory = (resource, categoryName) => {
    if (categoryName === 'All') return true;
    return resource.categories && resource.categories.some(cat => cat.name === categoryName);
  };

// Filter resources based on active category, search query, and filters
const filteredResources = useMemo(() => {
  return resources.filter(resource => {
    // Filter by category
    const categoryMatch = resourceHasCategory(resource, activeCategory);
    
    // Filter by search query
    const searchMatch = 
      resource.name.toLowerCase().includes(searchQuery.toLowerCase()) || 
      resource.description.toLowerCase().includes(searchQuery.toLowerCase()) ||
      (resource.domain && resource.domain.toLowerCase().includes(searchQuery.toLowerCase())) ||
      // Add search in tags
      (resource.tags && resource.tags.some(tag => 
        tag.name.toLowerCase().includes(searchQuery.toLowerCase())
      ));
    
    // Filter by "new" status if the toggle is active
    const newMatch = !showNewOnly || isNewResource(resource.created_at);
    
    // Filter by "impacts score" status if the toggle is active
    const scoreMatch = !showScoreImpactOnly || impactsScore(resource);
    
    return categoryMatch && searchMatch && newMatch && scoreMatch;
  });
}, [resources, activeCategory, searchQuery, showNewOnly, showScoreImpactOnly]);

  // Get featured resources
  const featuredResources = useMemo(() => {
    return resources.filter(resource => resource.featured);
  }, [resources]);
  
  // Group resources by category when "All" is selected and randomize order within each category
  const resourcesByCategory = useMemo(() => {
    if (activeCategory !== 'All') return {};
    
    const grouped = {};
    
    // First, initialize all category groups
    categories.forEach(category => {
      if (category !== 'All') {
        grouped[category] = [];
      }
    });
    
    // Then add resources to their respective categories
    filteredResources.forEach(resource => {
      if (resource.categories && resource.categories.length > 0) {
        // Add resource to each of its categories
        resource.categories.forEach(category => {
          if (!grouped[category.name]) {
            grouped[category.name] = [];
          }
          // Avoid duplicates
          if (!grouped[category.name].some(r => r.id === resource.id)) {
            grouped[category.name].push(resource);
          }
        });
      } else {
        // If no categories, add to Misc
        if (!grouped['Misc']) {
          grouped['Misc'] = [];
        }
        grouped['Misc'].push(resource);
      }
    });
    
    // Remove empty categories
    Object.keys(grouped).forEach(category => {
      if (grouped[category].length === 0) {
        delete grouped[category];
      } else {
        // Randomize order of resources within each category
        // Use Fisher-Yates shuffle algorithm
        const array = grouped[category];
        for (let i = array.length - 1; i > 0; i--) {
          const j = Math.floor(Math.random() * (i + 1));
          [array[i], array[j]] = [array[j], array[i]];
        }
      }
    });
    
    return grouped;
  }, [filteredResources, activeCategory, categories]);

  // Randomize the filtered resources order (for specific category views)
  const randomizedFilteredResources = useMemo(() => {
    // Only randomize when not in "All" category view
    if (activeCategory === 'All') return filteredResources;
    
    // Create a new array to avoid mutating the original
    const shuffled = [...filteredResources];
    
    // Fisher-Yates shuffle algorithm
    for (let i = shuffled.length - 1; i > 0; i--) {
      const j = Math.floor(Math.random() * (i + 1));
      [shuffled[i], shuffled[j]] = [shuffled[j], shuffled[i]];
    }
    
    return shuffled;
  }, [filteredResources, activeCategory]);
  
  // Should show featured section only when All category is selected and search query is empty
  const shouldShowFeatured = activeCategory === 'All' && 
  searchQuery.trim() === '' && 
  !showNewOnly && 
  !showScoreImpactOnly;

  // Handle search input change
  const handleSearchChange = (e) => {
    setSearchQuery(e.target.value);
  };

  // Handlers for filters to hide random resources
  const handleCategoryChange = (e) => {
    setActiveCategory(e.target.value);
  };

  const handleNewToggle = () => {
    setShowNewOnly(!showNewOnly);
  };

  const handleScoreToggle = () => {
    setShowScoreImpactOnly(!showScoreImpactOnly);
  };

  return (
    <main className="resources-page">
      <div className="alt-card">
        {/* Redesigned Header Section */}
        <header className="resources-header">
          <div className="header-main">
            <h1>Bluesky & AT Protocol Resources</h1>
            <div className="header-tagline">
              <p className="header-tagline-p">A curated collection of tools and services for the Bluesky ecosystem</p>
              <p className="header-tagline-detail">To submit a resource, DM @cred.blue</p>
            </div>
          </div>
          
          <div className="search-filters-container">
            <div className="search-container">
              <input 
                type="text" 
                placeholder="Search resources..." 
                value={searchQuery}
                onChange={handleSearchChange}
                className="search-input"
                aria-label="Search resources"
              />
            </div>
            
            <div className="quick-actions">
              <button
                className="feeling-lucky-button"
                type="button"
                onClick={getRandomResources}
                aria-label="Show random resources"
              >
                Feeling Lucky
              </button>
            </div>
          </div>
        </header>
        
        <div className="filter-controls-container">
          {/* Improved Filter Bar */}
          <div className="filter-bar">
            <div className="filter-section">
              {/* All filters in one row */}
              <div className="filters-row">
                {/* Category filter dropdown */}
                <div className="filter-dropdown">
                  <label htmlFor="category-select" className="filter-label">Category:</label>
                  <select 
                    id="category-select"
                    value={activeCategory}
                    onChange={handleCategoryChange}
                    className="filter-select"
                  >
                    {categories.map(category => (
                      <option key={category} value={category}>
                        {categoryEmojis[category] || '🔹'} {category} ({categoryCounts[category] || 0})
                      </option>
                    ))}
                  </select>
                </div>

                {/* Toggle filters */}
                <div className="toggle-filters">
                  {/* New resources toggle */}
                  <div className="toggle-filter">
                    <label className="toggle-label" htmlFor="new-toggle">
                      <input
                        id="new-toggle"
                        type="checkbox"
                        checked={showNewOnly}
                        onChange={handleNewToggle}
                        aria-label="Show only recently added resources"
                      />
                      <span className="toggle-text">Recently Added</span>
                    </label>
                  </div>
                  
                  {/* Score impact toggle */}
                  <div className="toggle-filter">
                    <label className="toggle-label" htmlFor="score-toggle">
                      <input
                        id="score-toggle"
                        type="checkbox"
                        checked={showScoreImpactOnly}
                        onChange={handleScoreToggle}
                        aria-label="Show only resources that impact score"
                      />
                      <span className="toggle-text">Impacts Score</span>
                    </label>
                  </div>
                </div>
                
                {/* Share button (moved to filter row) */}
                <div className="filter-share-button">
                  <button
                    className="share-button compact"
                    type="button"
                    onClick={shareOnBluesky}
                    aria-label="Share this page on Bluesky"
                  >
                    Share
                  </button>
                </div>
              </div>
            </div>
          </div>

          <div className="resources-disclaimer">
            <div className="disclaimer-icon">⚠️</div>
            <p><strong>Disclaimer:</strong> These resources are not affiliated with cred.blue or Bluesky. Use them at your own risk and exercise caution when providing access to your data.</p>
          </div>
        </div>
        
        {/* Loading indication */}
        {isLoading ? (
          <ResourceLoader />
        ) : (
        <>
          {/* Random Resources Section - now only shows when no filters are active */}
          {showRandomResources && randomResources.length > 0 && !showNewOnly && !showScoreImpactOnly && activeCategory === 'All' && searchQuery.trim() === '' && (
            <div id="random-resources-section" className="random-resources-section">
              <h2>Feeling Lucky Results</h2>
              <p className="featured-description">Here are {randomResources.length} resources picked just for you!</p>
              <div className="resources-grid">
                {randomResources.map((resource, index) => (
                  <ResourceCard 
                    key={`random-${index}`} 
                    resource={resource} 
                    isNew={isNewResource(resource.created_at)}
                    impactsScore={impactsScore(resource)}
                  />
                ))}
              </div>
            </div>
          )}
          
          {/* Featured Section - Hidden when quality filter is active or search query is not empty */}
          {shouldShowFeatured && featuredResources.length > 0 && (
            <div className="featured-section">
              <h2>Featured Resources</h2>
              <p className="featured-description">Hand-selected tools that we love and use regularly. These are not sponsored or paid placements.</p>
              <div className="resources-grid">
                {featuredResources.map((resource, index) => (
                  <ResourceCard 
                    key={`featured-${index}`} 
                    resource={resource} 
                    isNew={isNewResource(resource.created_at)}
                    impactsScore={impactsScore(resource)}
                  />
                ))}
              </div>
            </div>
          )}
          
          {activeCategory === 'All' ? (
            // When "All" is selected, show resources by category
            <div className="all-resources-section">
              <h2>All Resources ({filteredResources.length})</h2>
              
              {Object.keys(resourcesByCategory).sort().map(category => (
                <div key={category} className="category-section">
                  <h3 className="category-header">
                    {categoryEmojis[category] || '❓'} {category} ({resourcesByCategory[category].length})
                  </h3>
                  <div className="resources-grid">
                    {resourcesByCategory[category].map((resource, index) => (
                      <ResourceCard 
                        key={`${category}-${index}`} 
                        resource={resource} 
                        isNew={isNewResource(resource.created_at)}
                        impactsScore={impactsScore(resource)}
                      />
                    ))}
                  </div>
                </div>
              ))}
            </div>
          ) : (
            // When a specific category is selected
            <div className="all-resources-section">
              <h2>{categoryEmojis[activeCategory] || '❓'} {activeCategory} Resources ({filteredResources.length})</h2>
              {filteredResources.length > 0 ? (
                <div className="resources-grid">
                  {randomizedFilteredResources.map((resource, index) => (
                    <ResourceCard 
                      key={index} 
                      resource={resource} 
                      isNew={isNewResource(resource.created_at)}
                      impactsScore={impactsScore(resource)}
                    />
                  ))}
                </div>
              ) : (
                <div className="no-results">
                  <p>No resources found matching your filters.</p>
                </div>
              )}
            </div>
          )}
        </>
        )}
      </div>
    </main>
  );
};

// ResourceCard component for displaying individual resources
const ResourceCard = ({ resource, isNew, impactsScore }) => {
  return (
    <a 
      href={resource.url} 
      target="_blank" 
      rel="noopener noreferrer" 
      className="resource-card"
    >
      <div className="resource-content">
        <div className="resource-header">
          <h3 className="resource-name">{resource.name}</h3>
          <div className="resource-badges">
            {isNew && (
              <span className="new-badge">NEW</span>
            )}
            {impactsScore && (
              <span className="score-badge">SCORE</span>
            )}
          </div>
        </div>
        <p className="resource-description">{resource.description}</p>
        <p className="resource-domain">{resource.domain}</p>
        <div className="resource-meta">
          <div className="resource-categories">
            {resource.categories && resource.categories.length > 0 ? (
              resource.categories.map((cat, idx) => (
                <span key={idx} className="resource-category">
                  {cat.name}
                </span>
              ))
            ) : (
              <span className="resource-category">Misc</span>
            )}
          </div>
        </div>
        {resource.tags && resource.tags.length > 0 && (
          <div className="resource-tags">
            {resource.tags.map((tag, idx) => (
              <span key={idx} className="resource-tag">
                #{tag.name}
              </span>
            ))}
          </div>
        )}
      </div>
    </a>
  );
};

export default Resources;