'use client';

import { useState, useEffect } from 'react';
import { Promotion, CreatePromotionData, UpdatePromotionData, PROMOTION_TYPES } from '@/types/promotion';
import { PhotoIcon, XMarkIcon } from '@heroicons/react/24/outline';

interface PromotionFormProps {
    promotion?: Promotion | null;
    onSubmit: (data: CreatePromotionData | UpdatePromotionData) => Promise<void>;
    onCancel: () => void;
    isLoading: boolean;
}

export default function PromotionForm({ promotion, onSubmit, onCancel, isLoading }: PromotionFormProps) {
    const [formData, setFormData] = useState<CreatePromotionData | UpdatePromotionData>({
        type: 'slider',
        title: '',
        subtitle: '',
        action_text: '',
        url_myket: '',
        url_bazzar: '',
        url_google_play: '',
        url_site: '',
        priority: 0,
        start_at: '',
        end_at: '',
    });

    const [imageFile, setImageFile] = useState<File | null>(null);
    const [imagePreview, setImagePreview] = useState<string | null>(null);
    const [isActive, setIsActive] = useState(true);

    useEffect(() => {
        if (promotion) {
            const startAt = promotion.start_at ? promotion.start_at.slice(0, 16) : '';
            const endAt = promotion.end_at ? promotion.end_at.slice(0, 16) : '';
            setFormData({
                type: promotion.type || 'slider',
                title: promotion.title || '',
                subtitle: promotion.subtitle || '',
                action_text: promotion.action_text || '',
                url_myket: promotion.url_myket || '',
                url_bazzar: promotion.url_bazzar || '',
                url_google_play: promotion.url_google_play || '',
                url_site: promotion.url_site || '',
                priority: promotion.priority || 0,
                start_at: startAt,
                end_at: endAt,
            });
            setIsActive(promotion.is_active);
            if (promotion.image_url) setImagePreview(promotion.image_url);
        } else {
            setFormData(prev => ({ ...prev, priority: 0 }));
        }
    }, [promotion]);

    const handleInputChange = (e: React.ChangeEvent<HTMLInputElement | HTMLTextAreaElement | HTMLSelectElement>) => {
        const { name, value } = e.target;
        setFormData(prev => ({ ...prev, [name]: value === '' ? null : value }));
    };

    const handleNumberChange = (e: React.ChangeEvent<HTMLInputElement>) => {
        const { name, value } = e.target;
        setFormData(prev => ({ ...prev, [name]: value === '' ? null : parseInt(value, 10) }));
    };

    const handleImageChange = (e: React.ChangeEvent<HTMLInputElement>) => {
        const file = e.target.files?.[0];
        if (file) {
            setImageFile(file);
            setFormData(prev => ({ ...prev, image: file }));
            const reader = new FileReader();
            reader.onloadend = () => setImagePreview(reader.result as string);
            reader.readAsDataURL(file);
        }
    };

    const removeImage = () => {
        setImageFile(null);
        setImagePreview(null);
        setFormData(prev => ({ ...prev, image: null }));
    };

    const handleSubmit = async (e: React.FormEvent) => {
        e.preventDefault();
        let submitData: any = { ...formData };
        if (submitData.start_at) submitData.start_at = submitData.start_at.replace('T', ' ') + ':00';
        if (submitData.end_at) submitData.end_at = submitData.end_at.replace('T', ' ') + ':00';
        if (promotion) submitData.is_active = isActive;
        await onSubmit(submitData);
    };

    const inputClass = 'block w-full px-4 py-2.5 text-sm text-gray-900 dark:text-gray-100 border border-gray-200 dark:border-gray-700 rounded-xl bg-gray-50 dark:bg-gray-800/60 placeholder-gray-400 dark:placeholder-gray-500 focus:ring-2 focus:ring-indigo-500/20 focus:border-indigo-500 dark:focus:border-indigo-400 transition-colors';
    const labelClass = 'block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1.5';

    return (
        <form onSubmit={handleSubmit} className="space-y-6 bg-white dark:bg-gray-900 p-6 rounded-2xl ring-1 ring-gray-200 dark:ring-gray-800 shadow-sm">
            <div className="pb-4 border-b border-gray-100 dark:border-gray-800">
                <h3 className="text-lg font-semibold text-gray-900 dark:text-gray-100">
                    {promotion ? 'ویرایش تبلیغ' : 'ایجاد تبلیغ جدید'}
                </h3>
            </div>

            <div className="grid grid-cols-1 gap-5 md:grid-cols-2">
                <div>
                    <label htmlFor="type" className={labelClass}>نوع <span className="text-red-500">*</span></label>
                    <select id="type" name="type" required value={formData.type || 'slider'} onChange={handleInputChange} className={inputClass}>
                        {Object.entries(PROMOTION_TYPES).map(([value, label]) => (
                            <option key={value} value={value}>{label}</option>
                        ))}
                    </select>
                </div>
                <div>
                    <label htmlFor="title" className={labelClass}>عنوان</label>
                    <input type="text" id="title" name="title" value={formData.title || ''} onChange={handleInputChange} className={inputClass} placeholder="عنوان تبلیغ" />
                </div>
                <div className="md:col-span-2">
                    <label htmlFor="subtitle" className={labelClass}>زیرعنوان</label>
                    <input type="text" id="subtitle" name="subtitle" value={formData.subtitle || ''} onChange={handleInputChange} className={inputClass} placeholder="زیرعنوان تبلیغ" />
                </div>
                <div>
                    <label htmlFor="action_text" className={labelClass}>متن دکمه</label>
                    <input type="text" id="action_text" name="action_text" value={formData.action_text || ''} onChange={handleInputChange} className={inputClass} placeholder="مثال: همین حالا نصب کن" />
                </div>
                <div>
                    <label htmlFor="priority" className={labelClass}>اولویت</label>
                    <input type="number" id="priority" name="priority" min="0" value={formData.priority || 0} onChange={handleNumberChange} className={inputClass} placeholder="عدد بالاتر = اولویت بیشتر" />
                </div>
                <div>
                    <label htmlFor="start_at" className={labelClass}>تاریخ شروع</label>
                    <input type="datetime-local" id="start_at" name="start_at" value={formData.start_at || ''} onChange={handleInputChange} className={inputClass} />
                </div>
                <div>
                    <label htmlFor="end_at" className={labelClass}>تاریخ پایان</label>
                    <input type="datetime-local" id="end_at" name="end_at" value={formData.end_at || ''} onChange={handleInputChange} className={inputClass} />
                </div>
            </div>

            <div className="pt-4 border-t border-gray-100 dark:border-gray-800">
                <h4 className="text-sm font-semibold text-gray-900 dark:text-gray-100 mb-3">لینک‌ها</h4>
                <div className="grid grid-cols-1 gap-4 md:grid-cols-2">
                    <div>
                        <label htmlFor="url_myket" className={labelClass}>لینک مایکت</label>
                        <input type="url" id="url_myket" name="url_myket" value={formData.url_myket || ''} onChange={handleInputChange} className={inputClass} placeholder="https://myket.ir/app/..." dir="ltr" />
                    </div>
                    <div>
                        <label htmlFor="url_bazzar" className={labelClass}>لینک بازار</label>
                        <input type="url" id="url_bazzar" name="url_bazzar" value={formData.url_bazzar || ''} onChange={handleInputChange} className={inputClass} placeholder="https://cafebazaar.ir/app/..." dir="ltr" />
                    </div>
                    <div>
                        <label htmlFor="url_google_play" className={labelClass}>لینک گوگل‌پلی</label>
                        <input type="url" id="url_google_play" name="url_google_play" value={formData.url_google_play || ''} onChange={handleInputChange} className={inputClass} placeholder="https://play.google.com/store/apps/..." dir="ltr" />
                    </div>
                    <div>
                        <label htmlFor="url_site" className={labelClass}>لینک وبسایت</label>
                        <input type="url" id="url_site" name="url_site" value={formData.url_site || ''} onChange={handleInputChange} className={inputClass} placeholder="https://example.com" dir="ltr" />
                    </div>
                </div>
            </div>

            <div className="pt-2 border-t border-gray-100 dark:border-gray-800">
                <label className={labelClass}>تصویر</label>
                <div className="flex items-center gap-3">
                    <label className="cursor-pointer inline-flex items-center gap-2 px-4 py-2.5 rounded-xl border border-gray-200 dark:border-gray-700 text-sm font-medium text-gray-700 dark:text-gray-200 bg-gray-50 dark:bg-gray-800/60 hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors">
                        <PhotoIcon className="h-4 w-4 text-gray-400" />
                        انتخاب تصویر
                        <input type="file" accept="image/*" onChange={handleImageChange} className="hidden" />
                    </label>
                    {imagePreview && (
                        <button type="button" onClick={removeImage} className="text-red-500 hover:text-red-700 transition-colors">
                            <XMarkIcon className="h-5 w-5" />
                        </button>
                    )}
                </div>
                {imagePreview && (
                    <div className="mt-3 relative h-32 w-32 rounded-xl overflow-hidden ring-1 ring-gray-200 dark:ring-gray-800">
                        <img src={imagePreview} alt="Preview" className="w-full h-full object-cover" />
                    </div>
                )}
                <p className="mt-1.5 text-xs text-gray-400 dark:text-gray-500">حداکثر حجم: ۲ مگابایت</p>
            </div>

            {promotion && (
                <div className="pt-2 border-t border-gray-100 dark:border-gray-800">
                    <label className="flex items-center gap-3 p-3 rounded-xl bg-gray-50 dark:bg-gray-800/60 hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors cursor-pointer">
                        <input type="checkbox" id="is_active" checked={isActive} onChange={(e) => setIsActive(e.target.checked)} className="h-4 w-4 text-indigo-600 border-gray-300 dark:border-gray-600 dark:bg-gray-800 rounded-lg focus:ring-indigo-500" />
                        <span className="text-sm font-medium text-gray-700 dark:text-gray-300">فعال</span>
                    </label>
                </div>
            )}

            <div className="flex justify-end gap-3 pt-4 border-t border-gray-100 dark:border-gray-800">
                <button type="button" onClick={onCancel} className="px-5 py-2.5 rounded-xl border border-gray-200 dark:border-gray-700 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 transition-colors">
                    انصراف
                </button>
                <button type="submit" disabled={isLoading} className="px-5 py-2.5 rounded-xl bg-indigo-600 text-white text-sm font-medium hover:bg-indigo-700 focus:ring-2 focus:ring-indigo-500/30 disabled:opacity-50 transition-colors shadow-sm shadow-indigo-500/20">
                    {isLoading ? 'در حال ذخیره...' : promotion ? 'به‌روزرسانی' : 'ایجاد'}
                </button>
            </div>
        </form>
    );
}