'use client';

import { useState, useEffect } from 'react';
import { Product, CreateProductData, UpdateProductData, PRODUCT_TYPES } from '@/types/product';
import { PlusIcon, XMarkIcon } from '@heroicons/react/24/outline';

interface ProductFormProps {
    product?: Product | null;
    packageName: string;
    onSubmit: (data: CreateProductData | UpdateProductData) => Promise<void>;
    onCancel: () => void;
    isLoading: boolean;
}

export default function ProductForm({ product, packageName, onSubmit, onCancel, isLoading }: ProductFormProps) {
    const [formData, setFormData] = useState<CreateProductData | UpdateProductData>({
        title: '',
        price: 0,
        type: 4, // Default to monthly
        discounted_price: '',
        daily_price: '',
        discount: '',
        is_best_seller: false,
        sort_order: 0,
    });

    const [descriptions, setDescriptions] = useState<string[]>([]);
    const [newDescription, setNewDescription] = useState('');

    useEffect(() => {
        if (product) {
            setFormData({
                title: product.title || '',
                price: product.price || 0,
                type: product.type || 4,
                discounted_price: product.discounted_price || '',
                daily_price: product.daily_price || '',
                discount: product.discount || '',
                is_best_seller: product.is_best_seller || false,
                sort_order: product.sort_order || 0,
            });
            setDescriptions(product.descriptions || []);
        }
    }, [product]);

    const handleInputChange = (e: React.ChangeEvent<HTMLInputElement | HTMLSelectElement>) => {
        const { name, value, type } = e.target;
        if (type === 'checkbox') {
            const { checked } = e.target as HTMLInputElement;
            setFormData(prev => ({ ...prev, [name]: checked }));
            return;
        }
        setFormData(prev => ({
            ...prev,
            [name]: name === 'price' || name === 'sort_order' ? parseInt(value) || 0 : value,
        }));
    };

    const handleAddDescription = () => {
        if (newDescription.trim()) {
            setDescriptions([...descriptions, newDescription.trim()]);
            setNewDescription('');
        }
    };

    const handleRemoveDescription = (index: number) => {
        setDescriptions(descriptions.filter((_, i) => i !== index));
    };

    const handleSubmit = async (e: React.FormEvent) => {
        e.preventDefault();

        const submitData = {
            ...formData,
            ...(descriptions.length > 0 && { descriptions }),
        };

        await onSubmit(submitData);
    };

    return (
        <form onSubmit={handleSubmit} className="space-y-6 bg-white dark:bg-gray-900 p-6 rounded-lg shadow">
            <div>
                <h3 className="text-lg font-medium text-gray-900 dark:text-gray-100 mb-4">
                    {product ? 'ویرایش محصول' : 'ایجاد محصول جدید'} برای پکیج {packageName}
                </h3>
            </div>

            <div className="grid grid-cols-1 gap-6 md:grid-cols-2">
                {/* Title */}
                <div>
                    <label htmlFor="title" className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
                        عنوان <span className="text-red-500">*</span>
                    </label>
                    <input
                        type="text"
                        id="title"
                        name="title"
                        required
                        value={formData.title || ''}
                        onChange={handleInputChange}
                        className="block w-full px-3 py-2 text-slate-900 dark:text-gray-100 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark:bg-gray-800 dark:placeholder-gray-500 transition-colors"
                        placeholder="مثال: اشتراک ماهانه"
                    />
                </div>

                {/* Price */}
                <div>
                    <label htmlFor="price" className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
                        قیمت (تومان) <span className="text-red-500">*</span>
                    </label>
                    <input
                        type="number"
                        id="price"
                        name="price"
                        required
                        min="0"
                        value={formData.price || ''}
                        onChange={handleInputChange}
                        className="block w-full px-3 py-2 text-slate-900 dark:text-gray-100 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark:bg-gray-800 dark:placeholder-gray-500 transition-colors"
                        placeholder="مثال: 60000"
                    />
                </div>

                {/* Type */}
                <div>
                    <label htmlFor="type" className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
                        نوع اشتراک <span className="text-red-500">*</span>
                    </label>
                    <select
                        id="type"
                        name="type"
                        required
                        value={formData.type || 4}
                        onChange={handleInputChange}
                        className="block w-full px-3 py-2 text-slate-900 dark:text-gray-100 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark:bg-gray-800 dark:placeholder-gray-500 transition-colors"
                    >
                        {Object.entries(PRODUCT_TYPES).map(([value, label]) => (
                            <option key={value} value={value}>
                                {label}
                            </option>
                        ))}
                    </select>
                </div>

                {/* Discounted price (display only) */}
                <div>
                    <label htmlFor="discounted_price" className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
                        قیمت کلی تخفیف خورده <span className="text-xs text-gray-400">(فقط نمایشی)</span>
                    </label>
                    <input
                        type="text"
                        id="discounted_price"
                        name="discounted_price"
                        value={formData.discounted_price || ''}
                        onChange={handleInputChange}
                        dir="rtl"
                        className="block w-full px-3 py-2 text-slate-900 dark:text-gray-100 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark:bg-gray-800 dark:placeholder-gray-500 transition-colors"
                        placeholder="مثال: ۱٬۴۶۰٬۰۰۰"
                    />
                </div>

                {/* Daily price (display only) */}
                <div>
                    <label htmlFor="daily_price" className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
                        قیمت روزانه <span className="text-xs text-gray-400">(فقط نمایشی)</span>
                    </label>
                    <input
                        type="text"
                        id="daily_price"
                        name="daily_price"
                        value={formData.daily_price || ''}
                        onChange={handleInputChange}
                        dir="rtl"
                        className="block w-full px-3 py-2 text-slate-900 dark:text-gray-100 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark:bg-gray-800 dark:placeholder-gray-500 transition-colors"
                        placeholder="مثال: معادل روزانه ۴٬۰۰۰ تومان"
                    />
                </div>

                {/* Discount (display only) */}
                <div>
                    <label htmlFor="discount" className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
                        تخفیف <span className="text-xs text-gray-400">(فقط نمایشی)</span>
                    </label>
                    <input
                        type="text"
                        id="discount"
                        name="discount"
                        value={formData.discount || ''}
                        onChange={handleInputChange}
                        dir="rtl"
                        className="block w-full px-3 py-2 text-slate-900 dark:text-gray-100 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark:bg-gray-800 dark:placeholder-gray-500 transition-colors"
                        placeholder="مثال: ۵۵٪ تخفیف"
                    />
                </div>

                {/* Sort order */}
                <div>
                    <label htmlFor="sort_order" className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
                        ترتیب نمایش <span className="text-xs text-gray-400">(۰ بالاترین)</span>
                    </label>
                    <input
                        type="number"
                        id="sort_order"
                        name="sort_order"
                        min="0"
                        value={formData.sort_order ?? 0}
                        onChange={handleInputChange}
                        className="block w-full px-3 py-2 text-slate-900 dark:text-gray-100 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark:bg-gray-800 dark:placeholder-gray-500 transition-colors"
                        placeholder="0"
                    />
                </div>

                {/* Best seller */}
                <div className="md:col-span-2">
                    <label className="flex items-center gap-2 cursor-pointer">
                        <input
                            type="checkbox"
                            name="is_best_seller"
                            checked={!!formData.is_best_seller}
                            onChange={handleInputChange}
                            className="h-4 w-4 text-indigo-600 border-gray-300 dark:border-gray-600 rounded focus:ring-indigo-500 dark:bg-gray-800"
                        />
                        <span className="text-sm font-medium text-gray-700 dark:text-gray-300">
                            پرفروش‌ترین اشتراک
                        </span>
                        <span className="text-xs text-gray-400">(فقط برای یک محصول فعال می‌شود)</span>
                    </label>
                </div>
            </div>

            {/* Descriptions */}
            <div>
                <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
                    ویژگی‌ها
                </label>
                <div className="flex space-x-2 space-x-reverse">
                    <input
                        type="text"
                        value={newDescription}
                        onChange={(e) => setNewDescription(e.target.value)}
                        className="flex-1 px-3 py-2 text-slate-900 dark:text-gray-100 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm dark:bg-gray-800 dark:placeholder-gray-500 transition-colors"
                        placeholder="ویژگی جدید را وارد کنید"
                        onKeyPress={(e) => {
                            if (e.key === 'Enter') {
                                e.preventDefault();
                                handleAddDescription();
                            }
                        }}
                    />
                    <button
                        type="button"
                        onClick={handleAddDescription}
                        className="inline-flex items-center px-3 py-2 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-indigo-600 hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-offset-2 dark:focus:ring-offset-gray-900 focus:ring-indigo-500 transition-colors"
                    >
                        <PlusIcon className="h-5 w-5" />
                    </button>
                </div>

                {/* Descriptions List */}
                {descriptions.length > 0 && (
                    <ul className="mt-3 space-y-2">
                        {descriptions.map((desc, index) => (
                            <li key={index} className="flex items-center justify-between bg-gray-50 dark:bg-gray-800/60 px-3 py-2 rounded-md">
                                <span className="text-sm text-gray-700 dark:text-gray-300">{desc}</span>
                                <button
                                    type="button"
                                    onClick={() => handleRemoveDescription(index)}
                                    className="text-red-600 dark:text-red-400 hover:text-red-900 transition-colors"
                                >
                                    <XMarkIcon className="h-5 w-5" />
                                </button>
                            </li>
                        ))}
                    </ul>
                )}
            </div>

            {/* Form Actions */}
            <div className="flex justify-end space-x-3 space-x-reverse pt-4 border-t dark:border-gray-800">
                <button
                    type="button"
                    onClick={onCancel}
                    className="px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm text-sm font-medium text-gray-700 dark:text-gray-200 bg-white dark:bg-gray-800 hover:bg-gray-50 dark:hover:bg-gray-700 focus:outline-none focus:ring-2 focus:ring-offset-2 dark:focus:ring-offset-gray-900 focus:ring-indigo-500 transition-colors"
                >
                    انصراف
                </button>
                <button
                    type="submit"
                    disabled={isLoading}
                    className="px-4 py-2 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-indigo-600 hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-offset-2 dark:focus:ring-offset-gray-900 focus:ring-indigo-500 disabled:opacity-50 transition-colors"
                >
                    {isLoading ? 'در حال ذخیره...' : product ? 'به‌روزرسانی' : 'ایجاد'}
                </button>
            </div>
        </form>
    );
}