/**
 * Context Documents Section Component
 *
 * Main section for managing context documents in the TraceDetailsModal
 */

import React, { useState, useEffect } from "react";
import { Button } from "@/components/ui/button";
import { FileText, Plus } from "lucide-react";
import { useContextDocuments } from "@/hooks/useContextDocuments";
import { ContextDocumentCard } from "@/components/features/context/ContextDocumentCard";
import { ContextUploadDialog } from "@/components/features/context/ContextUploadDialog";
import { ContextDocumentModal } from "@/components/features/context/ContextDocumentModal";
import { ContextDocument } from "@/types/context";

interface ContextDocumentsSectionProps {
  traceId: string;
  showHeader?: boolean; // New prop to control header visibility
  triggerAdd?: number; // Prop to trigger add dialog from external button
}

export function ContextDocumentsSection({
  traceId,
  showHeader = true, // Default to showing header for backward compatibility
  triggerAdd,
}: ContextDocumentsSectionProps) {
  const {
    documents,
    loading,
    error,
    loadDocuments,
    deleteDocument,
    updateDocument,
  } = useContextDocuments();

  const [isUploadDialogOpen, setIsUploadDialogOpen] = useState(false);
  const [selectedDocument, setSelectedDocument] =
    useState<ContextDocument | null>(null);
  const [isModalOpen, setIsModalOpen] = useState(false);

  // Load documents when component mounts or traceId changes
  useEffect(() => {
    if (traceId) {
      loadDocuments(traceId);
    }
  }, [traceId, loadDocuments]);

  // Trigger add dialog when external button is clicked
  useEffect(() => {
    if (triggerAdd && triggerAdd > 0) {
      setIsUploadDialogOpen(true);
    }
  }, [triggerAdd]);

  const handleAddContext = () => {
    setIsUploadDialogOpen(true);
  };

  const handleDeleteDocument = async (contextId: string) => {
    const success = await deleteDocument(traceId, contextId);
    if (success) {
      // Document has been removed from state by the hook
    }
  };

  const handleViewEdit = (document: ContextDocument) => {
    setSelectedDocument(document);
    setIsModalOpen(true);
  };

  const handleModalClose = () => {
    setIsModalOpen(false);
    setSelectedDocument(null);
  };

  const handleDocumentSave = async (updates: any) => {
    if (!selectedDocument) return false;

    const updatedDocument = await updateDocument(
      traceId,
      selectedDocument.id,
      updates
    );
    if (updatedDocument) {
      setSelectedDocument(updatedDocument);
      return true;
    }
    return false;
  };

  const handleDocumentDelete = async () => {
    if (!selectedDocument) return false;

    const success = await deleteDocument(traceId, selectedDocument.id);
    if (success) {
      setIsModalOpen(false);
      setSelectedDocument(null);
    }
    return success;
  };

  if (error) {
    return (
      <div className="p-4 rounded-lg border border-destructive/20 bg-destructive/5">
        <div className="flex items-center gap-2 text-destructive mb-2">
          <FileText className="h-5 w-5" />
          <span className="font-medium">Context Documents - Error</span>
        </div>
        <p className="text-sm text-destructive mb-2">{error}</p>
        <Button
          variant="outline"
          size="sm"
          onClick={() => loadDocuments(traceId)}
        >
          Retry
        </Button>
      </div>
    );
  }

  return (
    <>
      <div className="space-y-4">
        {showHeader && (
          <div className="flex items-center justify-between">
            <div className="flex items-center gap-2">
              <FileText className="h-5 w-5" />
              <span className="font-medium">
                Context Documents ({documents.length})
              </span>
            </div>
            <Button
              onClick={handleAddContext}
              disabled={loading}
              size="sm"
              className="bg-primary hover:bg-primary/90"
              data-context-add-button
            >
              <Plus className="h-3 w-3 mr-2" />
              Add Context
            </Button>
          </div>
        )}

        {loading && documents.length === 0 ? (
          <div className="text-center py-8">
            <div className="w-8 h-8 border-2 border-primary border-t-transparent rounded-full animate-spin mx-auto mb-2" />
            <p className="text-sm text-muted-foreground">
              Loading context documents...
            </p>
          </div>
        ) : documents.length === 0 ? (
          <div className="text-center py-8 text-muted-foreground">
            <FileText className="h-12 w-12 mx-auto mb-3 opacity-50" />
            <p className="font-medium mb-2">No context documents yet</p>
            <p className="text-sm mb-4">
              Add domain knowledge, schemas, or guidelines to improve extraction
              quality.
            </p>
            <Button
              onClick={handleAddContext}
              size="sm"
              data-context-add-button
            >
              <Plus className="h-4 w-4 mr-2" />
              Add Your First Context Document
            </Button>
          </div>
        ) : (
          <div className="space-y-3">
            {documents.map((document) => (
              <ContextDocumentCard
                key={document.id}
                document={document}
                onDelete={() => handleDeleteDocument(document.id)}
                onViewEdit={() => handleViewEdit(document)}
              />
            ))}
          </div>
        )}
      </div>

      {/* Upload Dialog */}
      <ContextUploadDialog
        isOpen={isUploadDialogOpen}
        onClose={() => setIsUploadDialogOpen(false)}
        traceId={traceId}
        onSuccess={() => {
          setIsUploadDialogOpen(false);
          loadDocuments(traceId);
        }}
      />

      {/* Context Document Modal */}
      {selectedDocument && (
        <ContextDocumentModal
          document={selectedDocument}
          isOpen={isModalOpen}
          onClose={handleModalClose}
          onSave={handleDocumentSave}
          onDelete={handleDocumentDelete}
        />
      )}
    </>
  );
}