/**
 * This file is part of Sharenet.
 * 
 * Sharenet is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
 * 
 * You may obtain a copy of the license at:
 * https://creativecommons.org/licenses/by-nc-sa/4.0/
 * 
 * Copyright (c) 2024 Continuist <continuist02@gmail.com>
 */

'use client';

import { useState, useEffect } from 'react';
import { productApi, Product } from '@/lib/api';
import { Button } from '@/components/ui/button';
import { ResponsiveTable } from '@/components/ui/responsive-table';
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogTrigger,
} from '@/components/ui/dialog';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';

export default function ProductsPage() {
  const [products, setProducts] = useState<Product[]>([]);
  const [isDialogOpen, setIsDialogOpen] = useState(false);
  const [editingProduct, setEditingProduct] = useState<Product | null>(null);
  const [formData, setFormData] = useState({
    name: '',
    description: '',
  });
  const [errors, setErrors] = useState({
    name: '',
    description: '',
  });

  useEffect(() => {
    loadProducts();
  }, []);

  const loadProducts = async () => {
    try {
      const response = await productApi.getAll();
      setProducts(response.data);
    } catch (error) {
      console.error('Error loading products:', error);
    }
  };

  const validateForm = () => {
    const newErrors = {
      name: '',
      description: '',
    };

    // Product name cannot be empty
    if (!formData.name.trim()) {
      newErrors.name = 'Product name is required';
    }

    // Description can be empty, no validation needed
    setErrors(newErrors);
    return !newErrors.name;
  };

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    
    if (!validateForm()) {
      return;
    }

    try {
      if (editingProduct) {
        await productApi.update(editingProduct.id, formData);
      } else {
        await productApi.create(formData);
      }
      setIsDialogOpen(false);
      setEditingProduct(null);
      setFormData({ name: '', description: '' });
      setErrors({ name: '', description: '' });
      loadProducts();
    } catch (error) {
      console.error('Error saving product:', error);
    }
  };

  const handleEdit = (product: Product) => {
    setEditingProduct(product);
    setFormData({
      name: product.name,
      description: product.description,
    });
    setErrors({ name: '', description: '' });
    setIsDialogOpen(true);
  };

  const handleDelete = async (id: string) => {
    if (confirm('Are you sure you want to delete this product?')) {
      try {
        await productApi.delete(id);
        loadProducts();
      } catch (error) {
        console.error('Error deleting product:', error);
      }
    }
  };

  const handleInputChange = (field: 'name' | 'description', value: string) => {
    setFormData({ ...formData, [field]: value });
    // Clear error when user starts typing
    if (errors[field]) {
      setErrors({ ...errors, [field]: '' });
    }
  };

  const columns = [
    {
      key: 'name',
      header: 'Name',
      mobilePriority: true,
    },
    {
      key: 'description',
      header: 'Description',
      mobilePriority: true,
      render: (value: unknown) => String(value || 'No description'),
    },
    {
      key: 'actions',
      header: 'Actions',
      mobilePriority: true,
      render: (_: unknown, product: Record<string, unknown>) => (
        <div className="flex flex-col sm:flex-row gap-2 sm:gap-1">
          <Button 
            variant="outline" 
            size="sm" 
            onClick={() => handleEdit(product as unknown as Product)}
            className="w-full sm:w-auto"
          >
            Edit
          </Button>
          <Button 
            variant="destructive" 
            size="sm" 
            onClick={() => handleDelete((product as unknown as Product).id)}
            className="w-full sm:w-auto"
          >
            Delete
          </Button>
        </div>
      ),
    },
  ];

  return (
    <div className="space-y-6">
      <div className="flex flex-col sm:flex-row justify-between items-start sm:items-center gap-4">
        <h1 className="text-2xl font-bold">Products</h1>
        <Dialog open={isDialogOpen} onOpenChange={setIsDialogOpen}>
          <DialogTrigger asChild>
            <Button 
              onClick={() => {
                setEditingProduct(null);
                setFormData({ name: '', description: '' });
                setErrors({ name: '', description: '' });
              }}
              className="w-full sm:w-auto"
            >
              Add Product
            </Button>
          </DialogTrigger>
          <DialogContent className="sm:max-w-md">
            <DialogHeader>
              <DialogTitle>{editingProduct ? 'Edit Product' : 'Add Product'}</DialogTitle>
            </DialogHeader>
            <form onSubmit={handleSubmit} className="space-y-4">
              <div className="space-y-2">
                <Label htmlFor="name">Name *</Label>
                <Input
                  id="name"
                  value={formData.name}
                  onChange={(e) => handleInputChange('name', e.target.value)}
                  className={errors.name ? 'border-red-500' : ''}
                />
                {errors.name && (
                  <p className="text-red-500 text-sm">{errors.name}</p>
                )}
              </div>
              <div className="space-y-2">
                <Label htmlFor="description">Description</Label>
                <Input
                  id="description"
                  value={formData.description}
                  onChange={(e) => handleInputChange('description', e.target.value)}
                />
              </div>
              <div className="flex flex-col sm:flex-row gap-2 pt-2">
                <Button type="submit" className="flex-1">
                  {editingProduct ? 'Update' : 'Create'}
                </Button>
                <Button 
                  type="button" 
                  variant="outline" 
                  onClick={() => setIsDialogOpen(false)}
                  className="flex-1"
                >
                  Cancel
                </Button>
              </div>
            </form>
          </DialogContent>
        </Dialog>
      </div>

      <ResponsiveTable columns={columns} data={products as unknown as Record<string, unknown>[]} />
    </div>
  );
}