import { useState, useEffect } from 'react';
import { useNavigate } from 'react-router-dom';
import { Header } from '@/components/layout/Header';
import { Input } from '@/components/ui/input';
import { Button } from '@/components/ui/button';
import { Dialog, DialogContent } from '@/components/ui/dialog';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
import { Badge } from '@/components/ui/badge';
import { Search, SlidersHorizontal, Ruler, Plus } from 'lucide-react';
import { Company } from '@/types/database';
import { supabase } from '@/integrations/supabase/client';
import { DesignerCard } from '@/components/designers/DesignerCard';
import { DesignerForm } from '@/components/admin/DesignerForm';
import { useAuth } from '@/hooks/useAuth';
import { useUserRole } from '@/hooks/useUserRole';
import { toast } from '@/hooks/use-toast';
import { submitCompanyCreation } from '@/lib/companyHelpers';

export default function Designers() {
  const navigate = useNavigate();
  const { user } = useAuth();
  const { isModerator } = useUserRole();
  const [companies, setCompanies] = useState<Company[]>([]);
  const [loading, setLoading] = useState(true);
  const [searchQuery, setSearchQuery] = useState('');
  const [sortBy, setSortBy] = useState('name');
  const [isCreateModalOpen, setIsCreateModalOpen] = useState(false);

  const handleCreateSubmit = async (data: any) => {
    try {
      if (!user) {
        navigate('/auth');
        return;
      }
      const result = await submitCompanyCreation(data, 'designer', user.id, isModerator());
      toast({
        title: result.submitted ? "Designer Submitted" : "Designer Created",
        description: result.submitted ? "Your submission has been sent for review." : "The designer has been created successfully."
      });
      setIsCreateModalOpen(false);
      if (!result.submitted) fetchCompanies();
    } catch (error: any) {
      toast({ title: "Error", description: error.message || "Failed to create designer.", variant: "destructive" });
    }
  };

  useEffect(() => {
    fetchCompanies();
  }, [sortBy]);

  const fetchCompanies = async () => {
    try {
      let query = supabase
        .from('companies')
        .select('*');

      // Filter only designers
      query = query.eq('company_type', 'designer');

      // Apply sorting
      switch (sortBy) {
        case 'founded':
          query = query.order('founded_year', { ascending: false, nullsFirst: false });
          break;
        default:
          query = query.order('name');
      }

      const { data } = await query;
      setCompanies(data || []);
    } catch (error) {
      console.error('Error fetching companies:', error);
    } finally {
      setLoading(false);
    }
  };

  const filteredCompanies = companies.filter(company =>
    company.name.toLowerCase().includes(searchQuery.toLowerCase()) ||
    company.headquarters_location?.toLowerCase().includes(searchQuery.toLowerCase()) ||
    company.description?.toLowerCase().includes(searchQuery.toLowerCase())
  );

  if (loading) {
    return (
      <div className="min-h-screen bg-background">
        <Header />
        <div className="container mx-auto px-4 py-8">
          <div className="animate-pulse space-y-6">
            <div className="h-12 bg-muted rounded w-1/3"></div>
            <div className="grid md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
              {[...Array(8)].map((_, i) => (
                <div key={i} className="h-64 bg-muted rounded-lg"></div>
              ))}
            </div>
          </div>
        </div>
      </div>
    );
  }

  return (
    <div className="min-h-screen bg-background">
      <Header />
      
      <main className="container mx-auto px-4 py-8">
        {/* Page Header */}
        <div className="mb-8">
          <div className="flex items-center justify-between mb-4">
            <div className="flex items-center gap-3">
              <Ruler className="w-10 h-10 text-primary" />
              <h1 className="text-4xl font-bold">Designers</h1>
            </div>
            {(user && isModerator()) && (
              <Button onClick={() => setIsCreateModalOpen(true)}>
                <Plus className="w-4 h-4 mr-2" />Create Designer
              </Button>
            )}
          </div>
          <p className="text-lg text-muted-foreground">
            Explore the designers behind your favorite rides and attractions
          </p>
          <div className="flex items-center gap-2 mt-2">
            <Badge variant="secondary">{filteredCompanies.length} designers found</Badge>
          </div>
        </div>

        {/* Search and Filters */}
        <div className="space-y-3 mb-6">
          <div className="relative">
            <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 text-muted-foreground h-4 w-4" />
            <Input
              placeholder="Search designers..."
              value={searchQuery}
              onChange={(e) => setSearchQuery(e.target.value)}
              className="pl-10 h-11"
            />
          </div>
          
          <Select value={sortBy} onValueChange={setSortBy}>
            <SelectTrigger className="w-full h-10">
              <SlidersHorizontal className="h-4 w-4 mr-2" />
              <SelectValue />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value="name">Name A-Z</SelectItem>
              <SelectItem value="founded">Founded (Newest)</SelectItem>
            </SelectContent>
          </Select>
        </div>

        {/* Companies Grid */}
        {filteredCompanies.length > 0 ? (
          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-4 md:gap-6">
            {filteredCompanies.map((company) => (
              <DesignerCard key={company.id} company={company} />
            ))}
          </div>
        ) : (
          <div className="text-center py-12">
            <Ruler className="w-16 h-16 mb-4 mx-auto text-muted-foreground" />
            <h3 className="text-xl font-semibold mb-2">No designers found</h3>
            <p className="text-muted-foreground">
              Try adjusting your search criteria
            </p>
          </div>
        )}
      </main>
      <Dialog open={isCreateModalOpen} onOpenChange={setIsCreateModalOpen}>
        <DialogContent className="max-w-4xl max-h-[90vh] overflow-y-auto">
          <DesignerForm onSubmit={handleCreateSubmit} onCancel={() => setIsCreateModalOpen(false)} />
        </DialogContent>
      </Dialog>
    </div>
  );
}