import AuthenticatedLayout from '@/Layouts/AuthenticatedLayout';
import { Head, useForm, Link } from '@inertiajs/react';
import { Button } from '@/Components/ui/button';
import { Input } from '@/Components/ui/input';
import { Label } from '@/Components/ui/label';
import { Upload, ArrowLeft, FileSpreadsheet } from 'lucide-react';
import React from 'react';

export default function SalesImportCreate() {
    const { data, setData, post, processing, errors } = useForm({
        file: null as File | null,
    });

    const submit = (e: React.FormEvent) => {
        e.preventDefault();
        post(route('sales-imports.store'));
    };

    return (
        <AuthenticatedLayout
            breadcrumbs={[
                { label: '銷售管理', href: '#' },
                { label: '銷售單匯入', href: route('sales-imports.index') },
                { label: '新增匯入', href: route('sales-imports.create'), isPage: true },
            ]}
        >
            <Head title="新增銷售匯入" />

            <div className="container mx-auto p-6 max-w-3xl">
                <div className="mb-6">
                    <Link href={route('sales-imports.index')}>
                        <Button variant="outline" type="button" className="gap-2 mb-4">
                            <ArrowLeft className="h-4 w-4" />
                            返回列表
                        </Button>
                    </Link>
                    <h1 className="text-2xl font-bold text-gray-900 flex items-center gap-2">
                        <FileSpreadsheet className="h-6 w-6 text-primary-main" />
                        新增銷售匯入
                    </h1>
                </div>

                <div className="bg-white rounded-lg border shadow-sm p-8">
                    <form onSubmit={submit} className="space-y-6">
                        <div className="space-y-2">
                            <Label htmlFor="file" className="text-lg font-medium">上傳 Excel 檔案</Label>
                            <div className="border-2 border-dashed border-gray-300 rounded-xl p-10 flex flex-col items-center justify-center bg-gray-50 hover:bg-gray-100 transition-colors cursor-pointer relative">
                                <Input
                                    id="file"
                                    type="file"
                                    accept=".xlsx,.xls,.csv"
                                    onChange={(e) => setData('file', e.target.files ? e.target.files[0] : null)}
                                    className="absolute inset-0 w-full h-full opacity-0 cursor-pointer"
                                />
                                <Upload className="h-10 w-10 text-gray-400 mb-4" />
                                <div className="text-center">
                                    <p className="text-sm font-medium text-gray-700">
                                        {data.file ? data.file.name : '點擊或拖曳檔案至此'}
                                    </p>
                                    <p className="text-xs text-gray-500 mt-1">支援 .xlsx, .xls, .csv</p>
                                </div>
                            </div>
                            {errors.file && <p className="text-red-500 text-sm">{errors.file}</p>}
                        </div>

                        <div className="flex justify-end pt-4">
                            <Button
                                type="submit"
                                size="lg"
                                className="button-filled-primary w-full md:w-auto px-8"
                                disabled={processing}
                            >
                                {processing ? '處理中...' : '開始匯入'}
                            </Button>
                        </div>
                    </form>
                </div>

                <div className="mt-8 bg-blue-50 p-6 rounded-lg border border-blue-100">
                    <h3 className="font-bold text-blue-800 mb-2">匯入說明</h3>
                    <ul className="list-disc list-inside text-sm text-blue-700 space-y-1">
                        <li>請使用統一的 Excel 格式（商品銷貨單）。</li>
                        <li>系統將自動解析機台編號、商品代號與交易時間。</li>
                        <li>匯入後請至「待確認」清單檢查內容，確認無誤後再執行扣庫。</li>
                    </ul>
                </div>
            </div>
        </AuthenticatedLayout>
    );
}
