import { useKindeAuth } from "@kinde-oss/kinde-auth-react";
import React, { useEffect, useState } from "react";
import { Check, X } from "lucide-react";
import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "./ui/table";
import { Pagination } from "./ui/pagination";
import File from "./File";
import { 
  File as FileType, 
  FilesResponse, 
  NightFilter, 
  PaginationMetadata,
  SpeciesOption 
} from "../types";
// Define a component for just the filter controls
export const FilesFilter: React.FC<{
  clusterId: string;
  onFilterChange: (filter: NightFilter) => void;
  currentFilter: NightFilter;
  onSpeciesFilterChange: (speciesId: string | null) => void;
  currentSpeciesId: string | null;
  speciesOptions: SpeciesOption[];
  totalFiles?: number | undefined;
}> = ({ 
  currentFilter, 
  onFilterChange, 
  currentSpeciesId,
  onSpeciesFilterChange,
  speciesOptions,
  totalFiles 
}) => {
  return (
    <div className="flex flex-wrap items-center gap-4">
      <div className="flex items-center">
        <select
          id="nightFilter"
          value={currentFilter}
          onChange={(e) => onFilterChange(e.target.value as NightFilter)}
          className="rounded-md border border-gray-300 bg-white py-1 px-3 text-sm shadow-sm focus:border-primary focus:outline-none focus:ring-1 focus:ring-primary"
        >
          <option value="none">Time Filter</option>
          <option value="solarNight">Solar night</option>
          <option value="solarDay">Solar day</option>
          <option value="civilNight">Civil night</option>
          <option value="civilDay">Civil day</option>
        </select>
      </div>
      
      {speciesOptions.length > 0 && (
        <div className="flex items-center">
          <select
            id="speciesFilter"
            value={currentSpeciesId || ''}
            onChange={(e) => onSpeciesFilterChange(e.target.value || null)}
            className="rounded-md border border-gray-300 bg-white py-1 px-3 text-sm shadow-sm focus:border-primary focus:outline-none focus:ring-1 focus:ring-primary"
          >
            <option value="">Species Filter</option>
            {speciesOptions.map(species => (
              <option key={species.id} value={species.id}>
                {species.label}
              </option>
            ))}
          </select>
        </div>
      )}
      
      {totalFiles !== undefined && (
        <div className="text-gray-600 text-sm">
          {totalFiles} files
        </div>
      )}
    </div>
  );
};
interface FilesProps {
  clusterId: string;
  clusterName: string;
  datasetId: string | null; // Add datasetId to fetch species for the dataset (can be null)
  hideHeaderInfo?: boolean;
  nightFilter?: NightFilter;
}
const Files: React.FC<FilesProps> = ({ 
  clusterId, 
  clusterName,
  datasetId,
  hideHeaderInfo = false,
  nightFilter: externalNightFilter
}) => {
  // Force usage of parameters by logging their values in development
  React.useEffect(() => {
    if (process.env.NODE_ENV === 'development') {
      console.log('Files component props:', { clusterId, clusterName, datasetId, hideHeaderInfo });
    }
  }, [clusterId, clusterName, datasetId, hideHeaderInfo]);
  const { isAuthenticated, isLoading: authLoading, getAccessToken } = useKindeAuth();
  const [files, setFiles] = useState<FileType[]>([]);
  const [pagination, setPagination] = useState<PaginationMetadata | null>(null);
  const [loading, setLoading] = useState<boolean>(true);
  const [error, setError] = useState<string | null>(null);
  const [currentPage, setCurrentPage] = useState<number>(1);
  const [hasMetadata, setHasMetadata] = useState<boolean>(false);
  const [hasMothMetadata, setHasMothMetadata] = useState<boolean>(false);
  const [nightFilter, setNightFilter] = useState<NightFilter>(externalNightFilter || 'none');
  const [speciesFilter, setSpeciesFilter] = useState<string | null>(null);
  const [speciesOptions, setSpeciesOptions] = useState<SpeciesOption[]>([]);
  const [hasSpecies, setHasSpecies] = useState<boolean>(false);
  // We track loading state but don't need to display it since we're showing species in the table, not as a filter header
  const [, setLoadingSpecies] = useState<boolean>(true);
  
  // File modal state
  const [selectedFile, setSelectedFile] = useState<FileType | null>(null);
  const [isFileModalOpen, setIsFileModalOpen] = useState<boolean>(false);
  const [datasetOwnerId, setDatasetOwnerId] = useState<string | null>(null);
  
  const formatDuration = (durationSec: number): string => {
    const minutes = Math.floor(durationSec / 60);
    const seconds = Math.floor(durationSec % 60);
    return `${minutes}:${seconds.toString().padStart(2, '0')}`;
  };
  
  // Keep these formatters commented out for future use
  // const formatDateTime = (isoString: string): string => {
  //   try {
  //     const date = new Date(isoString);
  //     return new Intl.DateTimeFormat('en-GB', {
  //       year: 'numeric',
  //       month: 'short',
  //       day: '2-digit',
  //       hour: '2-digit',
  //       minute: '2-digit',
  //       hour12: false
  //     }).format(date);
  //   } catch {
  //     return isoString;
  //   }
  // };
  
  // const formatSampleRate = (rate: number): string => {
  //   return `${(rate / 1000).toFixed(1)} kHz`;
  // };
  
  const formatMoonPhase = (phase: number | null | undefined): string => {
    if (phase === null || phase === undefined) return "—";
    try {
      return Number(phase).toFixed(2);
    } catch {
      return "—";
    }
  };
  
  const formatBatteryVoltage = (volts: number | null | undefined): string => {
    if (volts === null || volts === undefined) return "—";
    try {
      return Number(volts).toFixed(1) + 'V';
    } catch {
      return "—";
    }
  };
  
  const formatTemperature = (temp: number | null | undefined): string => {
    if (temp === null || temp === undefined) return "—";
    try {
      return Number(temp).toFixed(1) + '°C';
    } catch {
      return "—";
    }
  };
  
  // Generate different gray shades for different metadata keys
  const getMetadataKeyColor = (key: string): string => {
    const grayShades = [
      'bg-stone-200 text-stone-800',
      'bg-gray-200 text-gray-800',
      'bg-slate-200 text-slate-800',
      'bg-zinc-200 text-zinc-800',
      'bg-neutral-200 text-neutral-800',
      'bg-stone-300 text-stone-800',
      'bg-gray-300 text-gray-800',
      'bg-slate-300 text-slate-800'
    ];
    
    // Simple hash function to get consistent shade for each key
    let hash = 0;
    for (let i = 0; i < key.length; i++) {
      hash = ((hash << 5) - hash + key.charCodeAt(i)) & 0xffffffff;
    }
    return grayShades[Math.abs(hash) % grayShades.length];
  };
  
  // Generate different gray shades for different species
  const getSpeciesColor = (speciesId: string): string => {
    const grayShades = [
      'bg-stone-200 text-stone-800',
      'bg-gray-200 text-gray-800',
      'bg-slate-200 text-slate-800',
      'bg-zinc-200 text-zinc-800',
      'bg-neutral-200 text-neutral-800',
      'bg-stone-300 text-stone-800',
      'bg-gray-300 text-gray-800',
      'bg-slate-300 text-slate-800'
    ];
    
    // Simple hash function to get consistent shade for each species
    let hash = 0;
    for (let i = 0; i < speciesId.length; i++) {
      hash = ((hash << 5) - hash + speciesId.charCodeAt(i)) & 0xffffffff;
    }
    return grayShades[Math.abs(hash) % grayShades.length];
  };
  
  // Render metadata as visual tags
  const renderMetadata = (metadata: unknown) => {
    if (!metadata) return "—";
    
    try {
      const metaObj = typeof metadata === 'string' 
        ? JSON.parse(metadata) 
        : metadata;
      
      if (typeof metaObj === 'object' && metaObj !== null) {
        const entries = Object.entries(metaObj);
        
        return (
          <div className="flex flex-wrap gap-1">
            {entries.map(([key, value]) => {
              const colorClass = getMetadataKeyColor(key);
              
              if (Array.isArray(value)) {
                // Render array values as separate tags with same color
                return value.map((item, index) => {
                  const cleanItem = String(item).replace(/[[\]"]/g, '').trim();
                  return (
                    <div 
                      key={`${key}-${index}`}
                      className={`inline-block px-3 py-1 rounded-full text-xs font-medium ${colorClass} text-center whitespace-nowrap overflow-hidden text-ellipsis`}
                      title={`${key}: ${cleanItem}`}
                    >
                      {cleanItem}
                    </div>
                  );
                });
              } else {
                // Render single value
                const displayValue = String(value).replace(/[[\]"]/g, '').trim();
                
                return (
                  <div 
                    key={key}
                    className={`inline-block px-3 py-1 rounded-full text-xs font-medium ${colorClass} text-center whitespace-nowrap overflow-hidden text-ellipsis`}
                    title={`${key}: ${displayValue}`}
                  >
                    {displayValue}
                  </div>
                );
              }
            })}
          </div>
        );
      }
      
      return JSON.stringify(metaObj);
    } catch (e) {
      console.error("Error formatting metadata:", e);
      return typeof metadata === 'string' 
        ? (metadata as string).substring(0, 50) 
        : "Invalid metadata";
    }
  };
  
  const handlePageChange = (newPage: number) => {
    if (newPage >= 1 && (!pagination || newPage <= pagination.totalPages)) {
      setCurrentPage(newPage);
    }
  };
  
  const handleSpeciesFilterChange = (newSpeciesId: string | null) => {
    setSpeciesFilter(newSpeciesId);
    // Reset to first page when changing filters
    setCurrentPage(1);
  };
  // Handle file name click
  const handleFileClick = (file: FileType) => {
    setSelectedFile(file);
    setIsFileModalOpen(true);
    
    // Fetch dataset owner if we don't have it yet
    if (!datasetOwnerId && datasetId) {
      void fetchDatasetOwner(datasetId).catch(console.error);
    }
  };
  // Fetch dataset owner
  const fetchDatasetOwner = React.useCallback(async (targetDatasetId: string) => {
    if (!isAuthenticated) return;
    try {
      const accessToken = await getAccessToken();
      console.log('Fetching dataset owner for:', targetDatasetId);
      const response = await fetch(`/api/datasets/${targetDatasetId}`, {
        headers: {
          Authorization: `Bearer ${accessToken}`,
        },
      });
      if (response.ok) {
        const result = await response.json();
        console.log('Dataset API response:', result);
        const owner = result.data?.owner || result.owner || null;
        console.log('Setting dataset owner to:', owner);
        setDatasetOwnerId(owner);
      } else {
        console.error('Failed to fetch dataset:', response.status, response.statusText);
      }
    } catch (error) {
      console.error("Error fetching dataset owner:", error);
    }
  }, [isAuthenticated, getAccessToken]);
  
  // Removed handleFilterChange function since we now use external filter
  const fetchFiles = React.useCallback(async (skipLoadingState = false) => {
    if (!isAuthenticated || !clusterId) {
      if (!authLoading) {
        setLoading(false);
      }
      return;
    }
    if (!skipLoadingState) {
      setLoading(true);
    }
    try {
      const accessToken = await getAccessToken();
      // Build URL with filters
      let url = `/api/files?clusterId=${encodeURIComponent(clusterId)}&page=${currentPage}&pageSize=100`;
      
      // Add night filters
      switch (nightFilter) {
        case 'solarNight':
          url += '&solarNight=true';
          break;
        case 'solarDay':
          url += '&solarNight=false';
          break;
        case 'civilNight':
          url += '&civilNight=true';
          break;
        case 'civilDay':
          url += '&civilNight=false';
          break;
        // 'none' doesn't add any filter parameters
      }
      
      // Add species filter if selected
      if (speciesFilter) {
        url += `&speciesId=${encodeURIComponent(speciesFilter)}`;
      }
      const response = await fetch(url, {
        headers: {
          Authorization: `Bearer ${accessToken}`,
        },
      });
      if (!response.ok) {
        throw new Error(`Server error: ${response.status}`);
      }
      const data = await response.json() as FilesResponse;
      if (!data.data || !Array.isArray(data.data) || !data.pagination) {
        throw new Error("Invalid response format");
      }
      
      // Process all metadata checks and state updates in a batch
      // to reduce multiple re-renders
      const validMetadata = data.data.some(file => {
        if (!file.metadata) return false;
        
        try {
          const meta = typeof file.metadata === 'string' 
            ? JSON.parse(file.metadata)
            : file.metadata;
            
          return meta && typeof meta === 'object' && Object.keys(meta).length > 0;
        } catch {
          return false;
        }
      });
      
      const validMothMetadata = data.data.some(file => 
        file.mothMetadata && 
        (file.mothMetadata.gain !== null || 
         file.mothMetadata.batteryV !== null || 
         file.mothMetadata.tempC !== null)
      );
      
      const validSpeciesData = data.data.some(file => 
        file.species && file.species.length > 0
      );
      
      // Use React 18's batch updates to minimize re-renders
      // All of these state updates will be batched into a single render
      setHasMetadata(validMetadata);
      setHasMothMetadata(validMothMetadata);
      setHasSpecies(validSpeciesData || speciesOptions.length > 0);
      setFiles(data.data);
      setPagination(data.pagination);
      setError(null);
    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : "Failed to fetch files";
      setError(errorMessage);
      // Clear data when there's an error
      setFiles([]);
      setPagination(null);
    } finally {
      setLoading(false);
    }
  }, [isAuthenticated, authLoading, getAccessToken, clusterId, currentPage, nightFilter, speciesFilter, speciesOptions.length]);
  // Effect to handle clusterId changes and initial load
  useEffect(() => {
    // Reset state when cluster changes
    setFiles([]);
    setPagination(null);
    setLoading(true);
    setError(null);
    
    // Use a small delay before fetching to allow the UI to show loading state
    // This prevents the brief flash of empty content
    const timeoutId = setTimeout(() => {
      if (isAuthenticated && !authLoading) {
        void fetchFiles().catch(console.error);
      }
    }, 50);
    
    return () => clearTimeout(timeoutId);
  }, [isAuthenticated, authLoading, clusterId, fetchFiles]);
  // Update internal state when external filter changes
  // This doesn't trigger a fetch because we use 'setNightFilter' which
  // will be caught by fetchFiles dependency
  useEffect(() => {
    if (externalNightFilter !== undefined) {
      setNightFilter(externalNightFilter);
    }
  }, [externalNightFilter]);
  
  // Effect to handle pagination and filter changes
  useEffect(() => {
    // Skip the initial render caused by the dependency array initialization
    // Only fetch if we're not already in the initial loading state (first load)
    if (!loading && (currentPage > 1 || nightFilter !== 'none' || speciesFilter !== null)) {
      // Use skipLoadingState=true to avoid flashing when changing filters or pagination
      // This allows data to be replaced smoothly without showing loading indicators
      void fetchFiles(true).catch(console.error);
    }
  }, [currentPage, nightFilter, speciesFilter, fetchFiles, loading]);
  
  // Fetch species for the dataset to populate the species filter dropdown
  useEffect(() => {
    setLoadingSpecies(true);
    setSpeciesOptions([]);
    
    const fetchSpecies = async () => {
      if (!isAuthenticated || !datasetId) {
        setLoadingSpecies(false);
        setSpeciesOptions([]);
        return;
      }
      
      try {
        const accessToken = await getAccessToken();
        const url = `/api/species?datasetId=${encodeURIComponent(datasetId)}`;
        
        const response = await fetch(url, {
          headers: {
            Authorization: `Bearer ${accessToken}`,
          },
        });
        
        if (!response.ok) {
          throw new Error(`Server error: ${response.status}`);
        }
        
        const data = await response.json() as { data: SpeciesOption[] };
        
        if (!data.data || !Array.isArray(data.data)) {
          throw new Error("Invalid response format");
        }
        
        setSpeciesOptions(data.data);
        setHasSpecies(data.data.length > 0);
      } catch (err) {
        console.error("Error fetching species:", err);
        // Don't show error for species, just hide the filter
        setSpeciesOptions([]);
      } finally {
        setLoadingSpecies(false);
      }
    };
    
    if (isAuthenticated && !authLoading) {
      void fetchSpecies().catch(console.error);
    }
  }, [isAuthenticated, authLoading, getAccessToken, datasetId]);
  return (
    <div className="card p-6 bg-white shadow-sm rounded-lg">
      {/* Filter controls - always show filters when we have data to filter, even if current filters result in no files */}
      {!loading && !error && (pagination || speciesOptions.length > 0) && (
        <div className="mb-4">
          <FilesFilter
            clusterId={clusterId}
            currentFilter={nightFilter}
            onFilterChange={setNightFilter}
            currentSpeciesId={speciesFilter}
            onSpeciesFilterChange={handleSpeciesFilterChange}
            speciesOptions={speciesOptions}
            totalFiles={pagination?.totalItems}
          />
        </div>
      )}
      {loading && (
        <div className="py-4 text-center text-gray-500 animate-fade-in">
          Loading files...
        </div>
      )}
      {error && (
        <div className="p-4 bg-red-50 text-red-700 rounded-md mb-4">
          <p className="font-medium">Error loading files</p>
          <p className="text-sm mt-1">{error}</p>
        </div>
      )}
      {!loading && !error && (
        <>
          <div className="w-full overflow-visible">
            <Table>
              <TableHeader className="bg-muted">
                <TableRow className="border-b-2 border-primary/20">
                  <TableHead className="w-[240px] py-3 font-bold text-sm uppercase">File</TableHead>
                  <TableHead className="py-3 font-bold text-sm uppercase">Online</TableHead>
                  {hasSpecies && (
                    <TableHead className="py-3 font-bold text-sm uppercase">Species</TableHead>
                  )}
                  <TableHead className="py-3 font-bold text-sm uppercase">Duration</TableHead>
                  {hasMothMetadata && (
                    <>
                      <TableHead className="py-3 font-bold text-sm uppercase">Gain</TableHead>
                      <TableHead className="py-3 font-bold text-sm uppercase">Battery</TableHead>
                      <TableHead className="py-3 font-bold text-sm uppercase">Temp</TableHead>
                    </>
                  )}
                  <TableHead className="py-3 font-bold text-sm uppercase">Moon Phase</TableHead>
                  {hasMetadata && (
                    <TableHead className="py-3 font-bold text-sm uppercase">Metadata</TableHead>
                  )}
                </TableRow>
              </TableHeader>
              <TableBody>
                {files.length > 0 ? (
                  files.map((file) => (
                    <TableRow key={file.id} className={`hover:bg-primary/5 ${file.upload ? "bg-gray-50" : ""}`}>
                      <TableCell 
                        className="font-medium whitespace-normal break-words cursor-pointer"
                        onClick={() => handleFileClick(file)}
                      >
                        {file.fileName}
                      </TableCell>
                      <TableCell 
                        className="whitespace-normal break-words cursor-pointer"
                        onClick={() => handleFileClick(file)}
                      >
                        {file.upload ? (
                          <Check className="h-4 w-4 text-gray-600" />
                        ) : (
                          <X className="h-4 w-4 text-gray-600" />
                        )}
                      </TableCell>
                      {hasSpecies && (
                        <TableCell 
                          className="whitespace-normal break-words cursor-pointer"
                          onClick={() => handleFileClick(file)}
                        >
                          {file.species && file.species.length > 0 ? (
                            <div className="flex flex-wrap gap-1">
                              {file.species.map(species => (
                                <div 
                                  key={species.id}
                                  className={`inline-block px-3 py-1 rounded-full text-xs font-medium ${getSpeciesColor(species.id)} text-center whitespace-nowrap overflow-hidden text-ellipsis`}
                                  style={{ minWidth: '80px', maxWidth: '150px' }}
                                  title={species.label} // Show full name on hover
                                >
                                  {species.label}
                                </div>
                              ))}
                            </div>
                          ) : "—"}
                        </TableCell>
                      )}
                      <TableCell 
                        className="whitespace-normal break-words cursor-pointer"
                        onClick={() => handleFileClick(file)}
                      >
                        {formatDuration(Number(file.duration))}
                      </TableCell>
                      {hasMothMetadata && (
                        <>
                          <TableCell 
                            className="whitespace-normal break-words cursor-pointer"
                            onClick={() => handleFileClick(file)}
                          >
                            {file.mothMetadata?.gain || "—"}
                          </TableCell>
                          <TableCell 
                            className="whitespace-normal break-words cursor-pointer"
                            onClick={() => handleFileClick(file)}
                          >
                            {formatBatteryVoltage(file.mothMetadata?.batteryV)}
                          </TableCell>
                          <TableCell 
                            className="whitespace-normal break-words cursor-pointer"
                            onClick={() => handleFileClick(file)}
                          >
                            {formatTemperature(file.mothMetadata?.tempC)}
                          </TableCell>
                        </>
                      )}
                      <TableCell 
                        className="whitespace-normal break-words cursor-pointer"
                        onClick={() => handleFileClick(file)}
                      >
                        {formatMoonPhase(file.moonPhase)}
                      </TableCell>
                      {hasMetadata && (
                        <TableCell 
                          className="whitespace-normal break-words cursor-pointer"
                          onClick={() => handleFileClick(file)}
                        >
                          {renderMetadata(file.metadata)}
                        </TableCell>
                      )}
                    </TableRow>
                  ))
                ) : (
                  <TableRow>
                    <TableCell 
                      colSpan={
                        // Calculate total columns based on optional columns
                        4 + // File, Status, Duration, Moon Phase (always present)
                        (hasSpecies ? 1 : 0) + 
                        (hasMothMetadata ? 3 : 0) + 
                        (hasMetadata ? 1 : 0)
                      } 
                      className="text-center py-8"
                    >
                      <div className="text-gray-500">
                        Try adjusting your filters to see more results
                      </div>
                    </TableCell>
                  </TableRow>
                )}
              </TableBody>
            </Table>
          </div>
          
          {pagination && pagination.totalPages > 1 && files.length > 0 && (
            <Pagination 
              currentPage={currentPage}
              totalPages={pagination.totalPages}
              onPageChange={handlePageChange}
            />
          )}
        </>
      )}
      {/* Initial state - completely empty cluster */}
      {!loading && !error && files.length === 0 && !pagination && speciesOptions.length === 0 && (
        <div className="p-4 bg-yellow-50 text-yellow-800 rounded-md">
          <p className="font-medium">No files found for this cluster</p>
        </div>
      )}
      {/* File Modal */}
      <File 
        file={selectedFile}
        isOpen={isFileModalOpen}
        onClose={() => setIsFileModalOpen(false)}
        datasetOwnerId={datasetOwnerId}
        datasetId={datasetId}
      />
    </div>
  );
};
export default Files;

  // Force usage of parameters by logging their values in development
  React.useEffect(() => {
    if (process.env.NODE_ENV === 'development') {
      console.log('File component datasetId:', datasetId);
    }
  }, [datasetId]);