import React, { useState, useEffect } from 'react';
import { useParams, useNavigate, useLocation } from 'react-router-dom';
import { EmployeeProjectDetail } from '../types';
import { Button } from '../components/ui/button';
import { 
  getEmployeeProjectDetailsByEmployeeId, 
  createEmployeeProjectDetail, 
  updateEmployeeProjectDetail 
} from '../services/employeeProjectDetailApi';
import { getEmployeeById } from '../services/employeeApi';
import EmployeeProjectList from '../components/employee-projects/EmployeeProjectList';
import { ArrowLeft, User } from 'lucide-react';
import { toast } from 'sonner';
import Header from '@/components/layout/header';
import Sidebar from '@/components/layout/sidebar';
import { useIsMobile } from '@/hooks/use-mobile';

const EmployeeProjects: React.FC = () => {
  const { id } = useParams<{ id: string }>();
  const employeeId = parseInt(id || '0');
  const navigate = useNavigate();
  const location = useLocation();
  const isMobile = useIsMobile();
  const [isSidebarOpen, setIsSidebarOpen] = useState(!isMobile);
  
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [projects, setProjects] = useState<EmployeeProjectDetail[]>([]);
  const [employeeName, setEmployeeName] = useState<string>('');

  // Close sidebar on mobile when route changes
  useEffect(() => {
    if (isMobile) {
      setIsSidebarOpen(false);
    }
  }, [location, isMobile]);

  // Update sidebar state when screen size changes
  useEffect(() => {
    setIsSidebarOpen(!isMobile);
  }, [isMobile]);

  const toggleSidebar = () => {
    setIsSidebarOpen(!isSidebarOpen);
  };

  const fetchProjects = async () => {
    setLoading(true);
    setError(null);
    try {
      if (employeeId) {
        const fetchedProjects = await getEmployeeProjectDetailsByEmployeeId(employeeId);
        setProjects(fetchedProjects);
        
        // Fetch employee details to display name
        console.log(`Fetching employee details for ID: ${employeeId}`);
        const employeeResponse = await getEmployeeById(employeeId);
        console.log('Employee response:', employeeResponse);
        
        if (employeeResponse.success && employeeResponse.data) {
          const name = `${employeeResponse.data.firstName} ${employeeResponse.data.lastName}`;
          console.log(`Setting employee name to: ${name}`);
          setEmployeeName(name);
        } else {
          console.log('Employee data not available or response not successful');
        }
      }
    } catch (err) {
      console.error('Error fetching employee projects:', err);
      setError('Failed to load projects. Please try again.');
      toast.error('Failed to load projects');
    } finally {
      setLoading(false);
    }
  };

  useEffect(() => {
    if (employeeId) {
      fetchProjects();
    } else {
      setError('Invalid employee ID');
      setLoading(false);
    }
  }, [employeeId]);

  const handleAddProject = async (data: Partial<EmployeeProjectDetail>) => {
    try {
      await createEmployeeProjectDetail({
        ...data,
        employeeId
      });
      toast.success('Project added successfully');
      fetchProjects(); // Refresh the list after adding
      return Promise.resolve();
    } catch (error) {
      console.error('Error adding project:', error);
      toast.error('Failed to add project');
      return Promise.reject(error);
    }
  };

  const handleEditProject = async (projectId: number, data: Partial<EmployeeProjectDetail>) => {
    try {
      await updateEmployeeProjectDetail(projectId, {
        ...data,
        employeeId
      });
      toast.success('Project updated successfully');
      fetchProjects(); // Refresh the list after editing
      return Promise.resolve();
    } catch (error) {
      console.error('Error updating project:', error);
      toast.error('Failed to update project');
      return Promise.reject(error);
    }
  };

  return (
    <div className="flex min-h-screen flex-col">
      <Header toggleSidebar={toggleSidebar} isSidebarOpen={isSidebarOpen} />
      <Sidebar isOpen={isSidebarOpen} setIsOpen={setIsSidebarOpen} />
      
      <main className={`flex-1 bg-muted/40 p-6 pt-20 md:p-10 md:pt-24 ${isSidebarOpen ? "md:ml-64" : ""} transition-all duration-300`}>
        <div className="mx-auto max-w-6xl">
          <div className="flex items-center justify-between mb-6">
            <div className="flex items-center">
              <Button 
                variant="ghost" 
                size="icon" 
                className="mr-2" 
                onClick={() => navigate(-1)}
              >
                <ArrowLeft className="h-5 w-5" />
              </Button>
              <div>
                <h1 className="text-2xl font-bold">Projects History</h1>
                {employeeName && (
                  <div className="flex items-center text-muted-foreground">
                    <User className="h-4 w-4 mr-1" />
                    <span>{employeeName}</span>
                  </div>
                )}
              </div>
            </div>
          </div>

          {loading ? (
            <div className="flex justify-center items-center h-64">
              <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-primary"></div>
            </div>
          ) : error ? (
            <div className="bg-destructive/10 text-destructive p-4 rounded-md">
              {error}
            </div>
          ) : (
            // Log to confirm employee name is available before rendering component
            ((logValue) => {
              console.log('About to render EmployeeProjectList with employeeName:', logValue);
              return (
                <EmployeeProjectList 
                  projects={projects}
                  employeeId={employeeId}
                  employeeName={employeeName}
                  onAdd={handleAddProject}
                  onEdit={handleEditProject}
                  onRefresh={fetchProjects}
                />
              );
            })(employeeName)
          )}
        </div>
      </main>
    </div>
  );
};

export default EmployeeProjects;